From 73545ea6611a5661dc9571d6d4f8f7bfd0ce65d7 Mon Sep 17 00:00:00 2001 From: Wei-Chen Wang Date: Fri, 2 Feb 2024 12:27:32 -0500 Subject: [PATCH] Support LLaVA (#89) --- .gitignore | 9 +- llm/application/chat.cc | 152 +- llm/include/Generate.h | 7 +- llm/include/common.h | 100 + llm/include/model.h | 35 +- llm/include/nn_modules/Fp32CLIPAttention.h | 45 + llm/include/nn_modules/Fp32CLIPEncoder.h | 37 + llm/include/nn_modules/Fp32CLIPEncoderLayer.h | 49 + .../nn_modules/Fp32CLIPVisionTransformer.h | 51 + llm/include/nn_modules/Fp32llamaDecoder.h | 24 +- llm/include/nn_modules/Fp32llamaForCausalLM.h | 19 +- llm/include/nn_modules/Int4llamaDecoder.h | 24 +- llm/include/nn_modules/Int4llamaForCausalLM.h | 19 +- llm/include/operators.h | 3 + llm/include/ops/Conv2D.h | 29 + llm/include/ops/Gelu.h | 6 + llm/include/stb_image.h | 8396 +++++++++++++++++ llm/scripts/chat-13b.sh | 2 + llm/scripts/chat.sh | 2 + llm/scripts/code.sh | 2 + llm/scripts/llava.sh | 7 + llm/scripts/voice_llava.sh | 7 + llm/scripts/voicechat.sh | 2 + llm/src/nn_modules/Fp32CLIPAttention.cc | 284 + llm/src/nn_modules/Fp32CLIPEncoder.cc | 47 + llm/src/nn_modules/Fp32CLIPEncoderLayer.cc | 119 + .../nn_modules/Fp32CLIPVisionTransformer.cc | 147 + .../nn_modules/Fp32GPTBigCodeDecoderLayer.cc | 24 +- llm/src/nn_modules/Fp32llamaDecoder.cc | 41 +- llm/src/nn_modules/Fp32llamaForCausalLM.cc | 19 +- .../nn_modules/Int4GPTBigCodeDecoderLayer.cc | 24 +- .../nn_modules/non_cuda/Int4llamaDecoder.cc | 33 +- .../non_cuda/Int4llamaForCausalLM.cc | 20 +- llm/src/nn_modules/non_cuda/LLaVAGenerate.cc | 580 ++ llm/src/ops/Conv2D.cc | 95 + llm/src/ops/Gelu.cc | 27 + llm/tools/clip_exporter.py | 166 + llm/tools/download_model.py | 8 + llm/tools/llama_exporter.py | 9 +- llm/tools/llama_qkv_merger.py | 8 +- llm/tools/llava_exporter.py | 175 + llm/tools/model_quantizer.py | 34 +- llm/tools/vila_exporter.py | 175 + requirements.txt | 5 +- 44 files changed, 10981 insertions(+), 86 deletions(-) create mode 100644 llm/include/nn_modules/Fp32CLIPAttention.h create mode 100644 llm/include/nn_modules/Fp32CLIPEncoder.h create mode 100644 llm/include/nn_modules/Fp32CLIPEncoderLayer.h create mode 100644 llm/include/nn_modules/Fp32CLIPVisionTransformer.h create mode 100644 llm/include/ops/Conv2D.h create mode 100644 llm/include/ops/Gelu.h create mode 100644 llm/include/stb_image.h create mode 100755 llm/scripts/chat-13b.sh create mode 100755 llm/scripts/chat.sh create mode 100755 llm/scripts/code.sh create mode 100755 llm/scripts/llava.sh create mode 100755 llm/scripts/voice_llava.sh create mode 100755 llm/scripts/voicechat.sh create mode 100644 llm/src/nn_modules/Fp32CLIPAttention.cc create mode 100644 llm/src/nn_modules/Fp32CLIPEncoder.cc create mode 100644 llm/src/nn_modules/Fp32CLIPEncoderLayer.cc create mode 100644 llm/src/nn_modules/Fp32CLIPVisionTransformer.cc create mode 100644 llm/src/nn_modules/non_cuda/LLaVAGenerate.cc create mode 100644 llm/src/ops/Conv2D.cc create mode 100644 llm/src/ops/Gelu.cc create mode 100644 llm/tools/clip_exporter.py create mode 100644 llm/tools/llava_exporter.py create mode 100644 llm/tools/vila_exporter.py diff --git a/.gitignore b/.gitignore index fe0af372..70495af5 100644 --- a/.gitignore +++ b/.gitignore @@ -14,6 +14,7 @@ .vscode/ assets/ +models/ *.bin !llama_vocab.bin !starcoder_vocab.bin @@ -31,8 +32,8 @@ voicechat profile_* !profile_*.cc libtorch/ +checkpoints/ -llm/chat -llm/output.wav -llm/tmpfile -llm/TTS \ No newline at end of file +output.wav +tmpfile +TTS/ diff --git a/llm/application/chat.cc b/llm/application/chat.cc index 4cd8dd56..1544e865 100644 --- a/llm/application/chat.cc +++ b/llm/application/chat.cc @@ -9,7 +9,7 @@ std::map model_config = { {"OPT_125m", OPT_125M}, {"OPT_1.3B", OPT_1_3B}, {"OPT_6.7B", OPT_6_7B}, {"LLaMA_7B", LLaMA_7B}, {"LLaMA2_7B_chat", LLaMA_7B}, {"7b", LLaMA_7B}, {"LLaMA2_13B_chat", LLaMA_13B}, {"13b", LLaMA_13B}, {"CodeLLaMA_7B_Instruct", CodeLLaMA_7B}, {"CodeLLaMA_13B_Instruct", CodeLLaMA_13B}, - {"StarCoder", StarCoder_15_5B}, {"StarCoder_15.5B", StarCoder_15_5B} + {"StarCoder", StarCoder_15_5B}, {"StarCoder_15.5B", StarCoder_15_5B}, {"LLaVA_7B", LLaVA_7B}, {"Clip_ViT_Large", Clip_ViT_Large} }; std::map model_path = {{"OPT_125m", "models/OPT_125m"}, @@ -23,7 +23,9 @@ std::map model_path = {{"OPT_125m", "models/OPT_125m"} {"CodeLLaMA_7B_Instruct", "models/CodeLLaMA_7B_Instruct"}, {"CodeLLaMA_13B_Instruct", "models/CodeLLaMA_13B_Instruct"}, {"StarCoder", "models/StarCoder"}, - {"StarCoder_15.5B", "models/StarCoder"} + {"StarCoder_15.5B", "models/StarCoder"}, + {"LLaVA_7B", "models/LLaVA_7B"}, + {"Clip_ViT_Large", "models/CLIP_ViT_Large"} }; std::map data_format_list = { @@ -33,7 +35,6 @@ std::map data_format_list = { bool isLLaMA(std::string s) { std::string LLaMA_prefix = "LLaMA"; std::string CodeLLaMA_prefix = "CodeLLaMA"; - if (s.substr(0, LLaMA_prefix.size()) == LLaMA_prefix || s.substr(0, CodeLLaMA_prefix.size()) == CodeLLaMA_prefix || s == "7b" || s == "13b") return true; else @@ -42,7 +43,6 @@ bool isLLaMA(std::string s) { bool isCodeLLaMA(std::string s) { std::string CodeLLaMA_prefix = "CodeLLaMA"; - if (s.substr(0, CodeLLaMA_prefix.size()) == CodeLLaMA_prefix) return true; else @@ -51,13 +51,20 @@ bool isCodeLLaMA(std::string s) { bool isStarCoder(std::string s) { std::string StarCoder_prefix = "StarCoder"; - if (s.substr(0, StarCoder_prefix.size()) == StarCoder_prefix) return true; else return false; } +bool isLLaVA(std::string s) { + std::string LLaVA_prefix = "LLaVA"; + if (s.substr(0, LLaVA_prefix.size()) == LLaVA_prefix) + return true; + else + return false; +} + bool convertToBool(const char* str) { if (strcmp(str, "true") == 0 || strcmp(str, "1") == 0) { return true; @@ -71,7 +78,7 @@ bool convertToBool(const char* str) { } } -int NUM_THREAD = 8; +int NUM_THREAD = 5; int main(int argc, char* argv[]) { bool use_voicechat = false; @@ -92,19 +99,26 @@ int main(int argc, char* argv[]) { std::string target_model = "LLaMA2_7B_chat"; std::string target_data_format = "INT4"; bool instruct = true; + std::string img_path = "images/monalisa.jpg"; Profiler::getInstance().for_demo = true; std::cout << "TinyChatEngine by MIT HAN Lab: https://github.com/mit-han-lab/TinyChatEngine" << std::endl; if (argc >= 3 && argc <= 5) { + auto target_str = argv[1]; + target_model = argv[1]; + if (argc >= 4) { NUM_THREAD = atoi(argv[3]); } if (argc == 5) { - instruct = convertToBool(argv[4]); + if (isCodeLLaMA(target_model)) { + instruct = convertToBool(argv[4]); + } + else if (isLLaVA(target_model)) { + img_path = argv[4]; + } } - auto target_str = argv[1]; - target_model = argv[1]; if (model_config.count(target_model) == 0) { std::cerr << "Model config:" << target_str << " unsupported" << std::endl; std::cerr << "Please select one of the following:"; @@ -161,6 +175,13 @@ int main(int argc, char* argv[]) { else std::cout << "Using data format: " << target_data_format << std::endl; } + else if (isLLaVA(target_model)) { + std::cout << "Using model: " + target_model << std::endl; + if (target_data_format == "INT4" || target_data_format == "int4") + std::cout << "Using AWQ for 4bit quantization: https://github.com/mit-han-lab/llm-awq" << std::endl; + else + std::cout << "Using data format: " << target_data_format << std::endl; + } else { // OPT target_model = "OPT6.7B"; target_data_format = "INT8"; @@ -225,7 +246,6 @@ int main(int argc, char* argv[]) { input = " [INST] " + input + " [/INST] "; } } - } else { if (isCodeLLaMA(target_model)) { @@ -297,7 +317,7 @@ int main(int argc, char* argv[]) { } } else { std::cout << std::endl; - std::cerr << "At this time, we only support FP32 and INT4 for LLaMA7B." << std::endl; + std::cerr << "At this time, we only support FP32 and INT4 for LLaMA_7B." << std::endl; } } else if (isStarCoder(target_model)) { int format_id = data_format_list[target_data_format]; @@ -349,6 +369,116 @@ int main(int argc, char* argv[]) { std::cout << std::endl; std::cerr << "At this time, we only support FP32 and INT4 for StarCoder." << std::endl; } + } else if (isLLaVA(target_model)) { + int format_id = data_format_list[target_data_format]; + + // Load model + std::cout << "Loading model... " << std::flush; + std::string clip_m_path = model_path["Clip_ViT_Large"]; + std::string llama_m_path = model_path[target_model]; + + int clip_model_id = model_config["Clip_ViT_Large"]; + int llama_model_id = model_config[target_model]; + + #ifdef MODEL_PREFIX + llama_m_path = MODEL_PREFIX + llama_m_path; + #endif + + struct opt_params generation_config; + generation_config.n_predict = 512; + generation_config.repeat_penalty = 1.1f; + generation_config.temp = 0.2f; + generation_config.n_vocab = 32000; + + int prompt_iter = 0; + + if (format_id == FP32) { + Fp32CLIPVisionTransformer clip_model = Fp32CLIPVisionTransformer(clip_m_path, get_opt_model_config(clip_model_id)); + Fp32LlamaForCausalLM llama_model = Fp32LlamaForCausalLM(llama_m_path, get_opt_model_config(llama_model_id)); + + // Get input from the user + while (true) { + std::string input; + if (prompt_iter == 1) { + std::cout << "Finished!" << std::endl; + } + if (prompt_iter > 0) { + if (use_voicechat){ + int result = std::system("./application/sts_utils/listen"); + std::ifstream in("tmpfile"); + std::getline(in, input); + result = std::system("rm tmpfile"); + (void)result; + std::cout << input << std::endl; + } else { + std::cout << "USER: "; + std::getline(std::cin, input); + } + if (input == "quit" || input == "Quit" || input == "Quit." || input == "quit.") + break; + std::cout << "ASSISTANT: " << std::endl; + } + + if (prompt_iter == 0) { + input = "This is a chat between a user and an assistant.\n\n### USER: "; + prompt_iter += 1; + } + else if (prompt_iter == 1) { + input = "\n" + input + "\n### ASSISTANT:"; + prompt_iter += 1; + } + else { + input = "### USER: " + input + "\n### ASSISTANT: \n"; + } + + LLaVAGenerate(llama_m_path, &llama_model, clip_m_path, &clip_model, LLaVA_FP32, input, img_path, generation_config, "models/llama_vocab.bin", true, false); + } + } else if (format_id == INT4) { + Fp32CLIPVisionTransformer clip_model = Fp32CLIPVisionTransformer(clip_m_path, get_opt_model_config(clip_model_id)); + llama_m_path = "INT4/" + llama_m_path; + Int4LlamaForCausalLM llama_model = Int4LlamaForCausalLM(llama_m_path, get_opt_model_config(llama_model_id)); + + // Get input from the user + while (true) { + if (prompt_iter == 1) { + std::cout << "Finished!" << std::endl; + } + std::string input; + if (prompt_iter > 0) { + if (use_voicechat){ + int result = std::system("./application/sts_utils/listen"); + std::ifstream in("tmpfile"); + std::getline(in, input); + result = std::system("rm tmpfile"); + (void)result; + std::cout << input << std::endl; + } else { + std::cout << "USER: "; + std::getline(std::cin, input); + } + if (input == "quit" || input == "Quit" || input == "Quit." || input == "quit.") + break; + std::cout << "ASSISTANT: " << std::endl; + } + + if (prompt_iter == 0) { + input = "This is a chat between a user and an assistant.\n\n### USER: "; + prompt_iter += 1; + } + else if (prompt_iter == 1) { + input = "\n" + input + "\n### ASSISTANT:"; + prompt_iter += 1; + } + else { + input = "### USER: " + input + "\n### ASSISTANT: \n"; + } + + LLaVAGenerate(llama_m_path, &llama_model, clip_m_path, &clip_model, LLaVA_INT4, input, img_path, generation_config, "models/llama_vocab.bin", true, use_voicechat); + } + } else { + std::cout << std::endl; + std::cerr << "At this time, we only support FP32 and INT4 for LLaVA_7B." << std::endl; + } } else { // OPT #ifdef QM_CUDA printf("OPT is not supported with CUDA backend yet."); diff --git a/llm/include/Generate.h b/llm/include/Generate.h index f241f030..63aefa12 100644 --- a/llm/include/Generate.h +++ b/llm/include/Generate.h @@ -24,6 +24,7 @@ Adapted from llama.cpp: #include "Int4OPTForCausalLM.h" #include "Int4llamaForCausalLM.h" #include "Int4GPTBigCodeForCausalLM.h" +#include "Fp32CLIPVisionTransformer.h" #include "OPTForCausalLM.h" #include "OPTTokenizer.h" #include "operators.h" @@ -100,11 +101,15 @@ std::vector OPTGenerate(void* model, int model_type, std::vector input const struct opt_params generation_config, Encoder* encoder = NULL, bool interactive = false, bool voicechat = false); -enum { OPT_INT8, LLaMA_FP32, LLaMA_INT4, OPT_FP32, OPT_INT4, StarCoder_FP32, StarCoder_INT4 }; +enum { OPT_INT8, LLaMA_FP32, LLaMA_INT4, OPT_FP32, OPT_INT4, StarCoder_FP32, StarCoder_INT4, LLaVA_FP32, LLaVA_INT4 }; std::string LLaMAGenerate(std::string param_path, void* model, int model_type, std::string text, const struct opt_params generation_config, std::string voc_path, bool interactive, bool voicechat); std::string GPTBigCodeGenerate(std::string param_path, void *model_ptr, int model_type, std::string text, const struct opt_params generation_config, std::string voc_path, bool interactive); +std::string LLaVAGenerate(std::string llama_param_path, void* llama_model_ptr, std::string clip_param_path, void* clip_model_ptr, int model_type, + std::string text, std::string img_path, const struct opt_params generation_config, std::string voc_path, bool interactive, + bool voicechat); + #endif // GENERATE_H diff --git a/llm/include/common.h b/llm/include/common.h index 1ce43879..42d46d26 100644 --- a/llm/include/common.h +++ b/llm/include/common.h @@ -125,6 +125,106 @@ class Matrix3D { Matrix3D() { m_data = NULL; } }; +template +class Matrix4D { + public: + Matrix4D(T *data, int dim_w, int dim_x, int dim_y, int dim_z) : + m_data(data), m_dim_w(dim_w), m_dim_x(dim_x), m_dim_y(dim_y), m_dim_z(dim_z) {} + +#if defined(__CUDACC__) + __host__ __device__ T &operator()(int w, int x, int y, int z) { + return m_data[w * m_dim_x * m_dim_y * m_dim_z + x * m_dim_y * m_dim_z + y * m_dim_z + z]; + } + + __host__ __device__ const T &operator()(int w, int x, int y, int z) const { + return m_data[w * m_dim_x * m_dim_y * m_dim_z + x * m_dim_y * m_dim_z + y * m_dim_z + z]; + } +#else + T &operator()(int w, int x, int y, int z) { + if (w < 0 || w >= m_dim_w || x < 0 || x >= m_dim_x || y < 0 || y >= m_dim_y || z < 0 || z >= m_dim_z) { + printf("%d, %d, %d, %d\n", w, x, y, z); + printf("%d, %d, %d, %d\n", m_dim_w, m_dim_x, m_dim_y, m_dim_z); + throw std::out_of_range("Matrix4D: Indices out of range."); + } + return m_data[w * m_dim_x * m_dim_y * m_dim_z + x * m_dim_y * m_dim_z + y * m_dim_z + z]; + } + + const T &operator()(int w, int x, int y, int z) const { + if (w < 0 || w >= m_dim_w || x < 0 || x >= m_dim_x || y < 0 || y >= m_dim_y || z < 0 || z >= m_dim_z) { + printf("%d, %d, %d, %d\n", w, x, y, z); + printf("%d, %d, %d, %d\n", m_dim_w, m_dim_x, m_dim_y, m_dim_z); + throw std::out_of_range("Matrix4D: Indices out of range."); + } + return m_data[w * m_dim_x * m_dim_y * m_dim_z + x * m_dim_y * m_dim_z + y * m_dim_z + z]; + } +#endif + + bool operator==(const Matrix4D &other) const { + if (m_dim_w != other.m_dim_w || m_dim_x != other.m_dim_x || m_dim_y != other.m_dim_y || m_dim_z != other.m_dim_z) { + return false; + } + + for (int w = 0; w < m_dim_w; ++w) { + for (int x = 0; x < m_dim_x; ++x) { + for (int y = 0; y < m_dim_y; ++y) { + for (int z = 0; z < m_dim_z; ++z) { + if ((*this)(w, x, y, z) != other(w, x, y, z)) { + return false; + } + } + } + } + } + + return true; + } + +#if defined(__CUDACC__) + __host__ __device__ int length() const { return m_dim_w * m_dim_x * m_dim_y * m_dim_z; } +#else + int length() const { return m_dim_w * m_dim_x * m_dim_y * m_dim_z; } +#endif + + T sum() const { + T sum = 0; + for (int i = 0; i < this->length(); i++) { + sum += this->m_data[i]; + } + return sum; + } + T sum(int size) const { + T sum = 0; + for (int i = 0; i < size; i++) { + sum += this->m_data[i]; + } + return sum; + } + + T sum(int size, int start_idx) const { + T sum = 0; + for (int i = 0; i < size; i++) { + sum += this->m_data[start_idx + i]; + } + return sum; + } + + void load(const char *path) { + std::ifstream infile(path, std::ios::binary | std::ios::in); + if (infile.fail()) { + std::cout << strerror(errno) << ": " << path << std::endl; + throw("Expected error..."); + } else { + infile.read(reinterpret_cast(this->m_data), this->length() * sizeof(T)); + infile.close(); + } + } + T *m_data; + int m_dim_w, m_dim_x, m_dim_y, m_dim_z; + + // Default constructor + Matrix4D() { m_data = NULL; } +}; + static inline void debug_info(std::string s) { #ifdef DEBUG std::cout << s << std::endl; diff --git a/llm/include/model.h b/llm/include/model.h index 27f1c193..9a06153d 100644 --- a/llm/include/model.h +++ b/llm/include/model.h @@ -12,8 +12,13 @@ struct model_config { int vocsize; int padding_idx; float rms_norm_eps; // RMSNorm epsilon (only for LLaMA models) + // Below are for Clip models + int image_size; + int patch_size; + int projection_dim; + int mmproj_dim; - model_config() : model_config(1, 32, 32, 2048, 4096, 11008, 32000, 1, 1e-6) {} + model_config() : model_config(1, 32, 32, 2048, 4096, 11008, 32000, 1, 1e-6, 0, 0, 0, 0) {} model_config(int batch, int num_heads, int num_layers, int max_sqlen, int embed_dim, int hidden_dim, int vocsize, int padding_idx, float rms_norm_eps) : batch(batch), @@ -25,9 +30,25 @@ struct model_config { vocsize(vocsize), padding_idx(padding_idx), rms_norm_eps(rms_norm_eps) {} + // Clip models + model_config(int batch, int num_heads, int num_layers, int max_sqlen, int embed_dim, int hidden_dim, int vocsize, + int padding_idx, float rms_norm_eps, int image_size, int patch_size, int projection_dim, int mmproj_dim) + : batch(batch), + num_heads(num_heads), + num_layers(num_layers), + max_sqlen(max_sqlen), + embed_dim(embed_dim), + hidden_dim(hidden_dim), + vocsize(vocsize), + padding_idx(padding_idx), + rms_norm_eps(rms_norm_eps), + image_size(image_size), + patch_size(patch_size), + projection_dim(projection_dim), + mmproj_dim(mmproj_dim) {} }; -enum { OPT_125M, OPT_1_3B, OPT_6_7B, LLaMA_7B, LLaMA_13B, CodeLLaMA_7B, CodeLLaMA_13B, StarCoder_15_5B }; +enum { OPT_125M, OPT_1_3B, OPT_6_7B, LLaMA_7B, LLaMA_13B, CodeLLaMA_7B, CodeLLaMA_13B, StarCoder_15_5B, LLaVA_7B, Clip_ViT_Large }; enum { FP32, QINT8, INT4 }; const struct model_config opt_6_7B(1, 32, 32, 2048, 4096, 16384, 50272, 1, 0); @@ -37,8 +58,10 @@ const struct model_config llama_7B(1, 32, 32, 2048, 4096, 11008, 32000, 1, 1e-6) const struct model_config llama_13B(1, 40, 40, 2048, 5120, 13824, 32000, 1, 1e-6); const struct model_config codellama_7B(1, 32, 32, 2048, 4096, 11008, 32016, 1, 1e-5); const struct model_config codellama_13B(1, 40, 40, 2048, 5120, 13824, 32016, 1, 1e-5); -// const struct model_config starcoder_15_5B(1, 32, 32, 2048, 4096, 11008, 32000, 1, 0); // temporary const struct model_config starcoder_15_5B(1, 48, 40, 2048, 6144, 24576, 49152, 1, 0); +const struct model_config llava_7B(1, 32, 32, 2048, 4096, 11008, 32000, 1, 1e-5); +const struct model_config clip_vit_large(1, 16, 23, 2048, 1024, 4096, 0, 1, 0, 336, 14, 768, 4096); // llava's clip model uses only 23 layers out of 24 + static struct model_config get_opt_model_config(int choise) { struct model_config ret; switch (choise) { @@ -66,6 +89,12 @@ static struct model_config get_opt_model_config(int choise) { case StarCoder_15_5B: ret = starcoder_15_5B; break; + case LLaVA_7B: + ret = llava_7B; + break; + case Clip_ViT_Large: + ret = clip_vit_large; + break; default: throw("Unsupported model choice."); break; diff --git a/llm/include/nn_modules/Fp32CLIPAttention.h b/llm/include/nn_modules/Fp32CLIPAttention.h new file mode 100644 index 00000000..af4be7ae --- /dev/null +++ b/llm/include/nn_modules/Fp32CLIPAttention.h @@ -0,0 +1,45 @@ +#include + +#include "common.h" +#include "operators.h" + +struct Fp32CLIPAttention_output { + Matrix3D attn_output; + Matrix3D attn_probs_reshaped; + std::pair, Matrix3D> past_key_value; +}; +struct Fp32CLIPAttention_input { + Matrix3D hidden_states; + Matrix3D attention_mask; + Matrix3D past_key, past_value; + bool has_past_key_value = false; + int layer_idx; + + Fp32CLIPAttention_input(Matrix3D hidden_states_, Matrix3D attention_mask_, int layer_idx_) + : hidden_states(hidden_states_), attention_mask(attention_mask_), layer_idx(layer_idx_) {} + + Fp32CLIPAttention_input(Matrix3D hidden_states_, Matrix3D attention_mask_, Matrix3D past_key_, + Matrix3D past_value_, bool has_past_key_value_, int layer_idx_) + : hidden_states(hidden_states_), + attention_mask(attention_mask_), + past_key(past_key_), + past_value(past_value_), + has_past_key_value(has_past_key_value_), + layer_idx(layer_idx_) {} +}; + +class Fp32CLIPAttention { + public: + Fp32CLIPAttention(std::string param_path, const struct model_config config); + Fp32CLIPAttention() {} + static void initialized_memory(const struct model_config config); + struct Fp32CLIPAttention_output forward(const struct Fp32CLIPAttention_input &input); + + private: + void unshape(Matrix3D shaped, Matrix3D unshape, int sqlen); + void shape(Matrix3D unshape, Matrix3D shaped, int sqlen); + int embed_dim, num_heads, head_dim; + Linear_FP k_proj, v_proj, q_proj, out_proj; + BMM_F32T qk_bmm, pv_bmm; + std::string profile_name = "Fp32CLIPAttention"; +}; diff --git a/llm/include/nn_modules/Fp32CLIPEncoder.h b/llm/include/nn_modules/Fp32CLIPEncoder.h new file mode 100644 index 00000000..8b19522c --- /dev/null +++ b/llm/include/nn_modules/Fp32CLIPEncoder.h @@ -0,0 +1,37 @@ +#include +#include +#include + +#include "Fp32CLIPEncoderLayer.h" +#include "common.h" +#include "operators.h" + +struct Fp32CLIPEncoder_output { + Matrix3D last_hidden_state; + std::vector> past_keys, past_values; +}; +struct Fp32CLIPEncoder_input { + Matrix3D hidden_states; + Matrix3D attention_mask; + std::vector> past_keys, past_values; + bool has_past_keys_values; + + Fp32CLIPEncoder_input(Matrix3D hidden_states_, Matrix3D attention_mask_) + : hidden_states(hidden_states_), attention_mask(attention_mask_) { + has_past_keys_values = false; + } + Fp32CLIPEncoder_input(Matrix3D hidden_states_, Matrix3D attention_mask_, + std::vector> past_keys_, std::vector> past_values_) + : hidden_states(hidden_states_), attention_mask(attention_mask_), past_keys(past_keys_), past_values(past_values_) { + has_past_keys_values = true; + } +}; + +class Fp32CLIPEncoder { + public: + Fp32CLIPEncoder(std::string param_path, const struct model_config config); + Fp32CLIPEncoder(){}; + struct Fp32CLIPEncoder_output forward(const struct Fp32CLIPEncoder_input& input); + std::vector layers; + std::string profile_name = "Fp32CLIPEncoder"; +}; diff --git a/llm/include/nn_modules/Fp32CLIPEncoderLayer.h b/llm/include/nn_modules/Fp32CLIPEncoderLayer.h new file mode 100644 index 00000000..5736bb48 --- /dev/null +++ b/llm/include/nn_modules/Fp32CLIPEncoderLayer.h @@ -0,0 +1,49 @@ +#include "Fp32CLIPAttention.h" +#include "common.h" +#include "operators.h" + +struct Fp32CLIPEncoderLayer_output { + Matrix3D hidden_states; + Matrix3D attentions; + std::pair, Matrix3D> past_key_value; + + Fp32CLIPEncoderLayer_output(Matrix3D hidden_states_, Matrix3D attentions_, + std::pair, Matrix3D> past_key_value_) { + hidden_states = hidden_states_; + attentions = attentions_; + past_key_value = past_key_value_; + }; +}; +struct Fp32CLIPEncoderLayer_input { + Matrix3D hidden_states; + Matrix3D attention_mask; + Matrix3D past_key, past_value; + bool has_past_key_value = false; + + Fp32CLIPEncoderLayer_input(Matrix3D &hidden_states_, Matrix3D attention_mask_) { + hidden_states = hidden_states_; + attention_mask = attention_mask_; + has_past_key_value = false; + } + + Fp32CLIPEncoderLayer_input(Matrix3D &hidden_states_, Matrix3D attention_mask_, + Matrix3D past_key_, Matrix3D past_value_) { + hidden_states = hidden_states_; + attention_mask = attention_mask_; + past_key = past_key_; + past_value = past_value_; + has_past_key_value = true; + } +}; + +class Fp32CLIPEncoderLayer { + public: + Fp32CLIPEncoderLayer(std::string param_path, const struct model_config config, int layer_idx); + struct Fp32CLIPEncoderLayer_output forward(const struct Fp32CLIPEncoderLayer_input &input); + + int embed_dim, num_attention_heads, hidden_dim, layer_idx; + LayerNorm layer_norm1, layer_norm2; + Linear_FP mlp_fc1, mlp_fc2; + Fp32CLIPAttention attn; + std::string profile_name = "Fp32CLIPEncoderLayer"; +}; diff --git a/llm/include/nn_modules/Fp32CLIPVisionTransformer.h b/llm/include/nn_modules/Fp32CLIPVisionTransformer.h new file mode 100644 index 00000000..268c0425 --- /dev/null +++ b/llm/include/nn_modules/Fp32CLIPVisionTransformer.h @@ -0,0 +1,51 @@ +#include +#include +#include + +#include "Fp32CLIPEncoder.h" +#include "common.h" +#include "operators.h" + +struct Fp32CLIPVisionTransformer_output { + Matrix3D last_hidden_state; + std::vector> past_keys, past_values; +}; +struct Fp32CLIPVisionTransformer_input { + Matrix3D input_image; + std::vector> past_keys, past_values; + bool has_past_keys_values; + + Fp32CLIPVisionTransformer_input() {} + Fp32CLIPVisionTransformer_input(Matrix3D input_image_) : input_image(input_image_) { has_past_keys_values = false; } + Fp32CLIPVisionTransformer_input(Matrix3D input_image_, std::vector> past_keys_, + std::vector> past_values_) + : input_image(input_image_), past_keys(past_keys_), past_values(past_values_) { + has_past_keys_values = true; + } +}; + +class Fp32CLIPVisionTransformer { + public: + Fp32CLIPVisionTransformer(std::string param_path, const struct model_config config); + Fp32CLIPVisionTransformer(){}; + struct Fp32CLIPVisionTransformer_output forward(const struct Fp32CLIPVisionTransformer_input& input); + Embedding embed_positions; + Conv2D embed_patch; + LayerNorm pre_layernorm; + Linear_FP mm_proj_0, mm_proj_2; + int voc_size, embed_dim, padding_idx, hidden_dim, num_heads, image_size, patch_size, num_patches, num_positions, + projection_dim, mmproj_dim; + std::vector layers; + std::string profile_name = "Fp32CLIPVisionTransformer"; + + private: + Fp32CLIPEncoder encoder; + float* patch_embeds_buf; + float* class_embeds_buf; + float* pos_embeds_buf; + float* last_hidden_states_buf; + float* hidden_states_buf; + float* embeddings_buf; + float* mm_proj_0_arr; + float* mm_proj_2_arr; +}; diff --git a/llm/include/nn_modules/Fp32llamaDecoder.h b/llm/include/nn_modules/Fp32llamaDecoder.h index 8502d0ed..7f7ddc68 100644 --- a/llm/include/nn_modules/Fp32llamaDecoder.h +++ b/llm/include/nn_modules/Fp32llamaDecoder.h @@ -12,14 +12,32 @@ struct Fp32llamaDecoder_output { }; struct Fp32llamaDecoder_input { Matrix3D input_ids; + Matrix3D image_embed; + Matrix3D second_input_ids; std::vector> past_keys, past_values; bool has_past_keys_values; + bool is_llava; - Fp32llamaDecoder_input(Matrix3D input_ids_) : input_ids(input_ids_) { has_past_keys_values = false; } + Fp32llamaDecoder_input() {} + Fp32llamaDecoder_input(Matrix3D input_ids_) : input_ids(input_ids_) { + has_past_keys_values = false; + is_llava = false; + } Fp32llamaDecoder_input(Matrix3D input_ids_, std::vector> past_keys_, std::vector> past_values_) : input_ids(input_ids_), past_keys(past_keys_), past_values(past_values_) { has_past_keys_values = true; + is_llava = false; + } + Fp32llamaDecoder_input(Matrix3D input_ids_, Matrix3D image_embed_, Matrix3D second_input_ids_) + : input_ids(input_ids_), image_embed(image_embed_), second_input_ids(second_input_ids_) { + has_past_keys_values = false; + is_llava = true; + } + Fp32llamaDecoder_input(Matrix3D input_ids_, Matrix3D image_embed_) + : input_ids(input_ids_), image_embed(image_embed_) { + has_past_keys_values = false; + is_llava = true; } }; @@ -41,4 +59,8 @@ class Fp32llamaDecoder { float* pos_embeds_buf; float* last_hidden_states_buf; float* hidden_states_buf; + float* inputs_embeds_buf; + float* first_input_ids_buf; + float* image_embed_buf; + float* second_input_ids_buf; }; diff --git a/llm/include/nn_modules/Fp32llamaForCausalLM.h b/llm/include/nn_modules/Fp32llamaForCausalLM.h index dde35f4c..0ef86373 100644 --- a/llm/include/nn_modules/Fp32llamaForCausalLM.h +++ b/llm/include/nn_modules/Fp32llamaForCausalLM.h @@ -6,15 +6,32 @@ struct Fp32LlamaForCausalLM_output { }; struct Fp32LlamaForCausalLM_input { Matrix3D input_ids; + Matrix3D image_embed; + Matrix3D second_input_ids; std::vector> past_keys, past_values; bool has_past_keys_values; + bool is_llava; Fp32LlamaForCausalLM_input() {} - Fp32LlamaForCausalLM_input(Matrix3D input_ids_) : input_ids(input_ids_) { has_past_keys_values = false; } + Fp32LlamaForCausalLM_input(Matrix3D input_ids_) : input_ids(input_ids_) { + has_past_keys_values = false; + is_llava = false; + } Fp32LlamaForCausalLM_input(Matrix3D input_ids_, std::vector> past_keys_, std::vector> past_values_) : input_ids(input_ids_), past_keys(past_keys_), past_values(past_values_) { has_past_keys_values = true; + is_llava = false; + } + Fp32LlamaForCausalLM_input(Matrix3D input_ids_, Matrix3D image_embed_, Matrix3D second_input_ids_) + : input_ids(input_ids_), image_embed(image_embed_), second_input_ids(second_input_ids_) { + has_past_keys_values = false; + is_llava = true; + } + Fp32LlamaForCausalLM_input(Matrix3D input_ids_, Matrix3D image_embed_) + : input_ids(input_ids_), image_embed(image_embed_) { + has_past_keys_values = false; + is_llava = true; } }; diff --git a/llm/include/nn_modules/Int4llamaDecoder.h b/llm/include/nn_modules/Int4llamaDecoder.h index 7b5c57f2..ea90e856 100644 --- a/llm/include/nn_modules/Int4llamaDecoder.h +++ b/llm/include/nn_modules/Int4llamaDecoder.h @@ -17,14 +17,21 @@ struct Int4llamaDecoder_output { }; struct Int4llamaDecoder_input { Matrix3D input_ids; + Matrix3D image_embed; + Matrix3D second_input_ids; bool has_past_keys_values; + bool is_llava; #ifdef QM_CUDA std::vector> past_keys, past_values; #else std::vector> past_keys, past_values; #endif - Int4llamaDecoder_input(Matrix3D input_ids_) : input_ids(input_ids_) { has_past_keys_values = false; } + Int4llamaDecoder_input() {} + Int4llamaDecoder_input(Matrix3D input_ids_) : input_ids(input_ids_) { + has_past_keys_values = false; + is_llava = false; + } #ifdef QM_CUDA Int4llamaDecoder_input(Matrix3D input_ids_, std::vector> past_keys_, std::vector> past_values_) @@ -34,6 +41,17 @@ struct Int4llamaDecoder_input { #endif : input_ids(input_ids_), past_keys(past_keys_), past_values(past_values_) { has_past_keys_values = true; + is_llava = false; + } + Int4llamaDecoder_input(Matrix3D input_ids_, Matrix3D image_embed_, Matrix3D second_input_ids_) + : input_ids(input_ids_), image_embed(image_embed_), second_input_ids(second_input_ids_) { + has_past_keys_values = false; + is_llava = true; + } + Int4llamaDecoder_input(Matrix3D input_ids_, Matrix3D image_embed_) + : input_ids(input_ids_), image_embed(image_embed_) { + has_past_keys_values = false; + is_llava = true; } }; @@ -64,6 +82,10 @@ class Int4llamaDecoder { float* pos_embeds_buf; float* last_hidden_states_buf; float* hidden_states_buf; + float* inputs_embeds_buf; + float* first_input_ids_buf; + float* image_embed_buf; + float* second_input_ids_buf; #endif float* norm_weight_ptr = nullptr; }; diff --git a/llm/include/nn_modules/Int4llamaForCausalLM.h b/llm/include/nn_modules/Int4llamaForCausalLM.h index 80f03002..2e9c7bfa 100644 --- a/llm/include/nn_modules/Int4llamaForCausalLM.h +++ b/llm/include/nn_modules/Int4llamaForCausalLM.h @@ -10,7 +10,10 @@ struct Int4LlamaForCausalLM_output { }; struct Int4LlamaForCausalLM_input { Matrix3D input_ids; + Matrix3D image_embed; + Matrix3D second_input_ids; bool has_past_keys_values; + bool is_llava; #ifdef QM_CUDA std::vector> past_keys, past_values; #else @@ -18,7 +21,10 @@ struct Int4LlamaForCausalLM_input { #endif Int4LlamaForCausalLM_input() {} - Int4LlamaForCausalLM_input(Matrix3D input_ids_) : input_ids(input_ids_) { has_past_keys_values = false; } + Int4LlamaForCausalLM_input(Matrix3D input_ids_) : input_ids(input_ids_) { + has_past_keys_values = false; + is_llava = false; + } #ifdef QM_CUDA Int4LlamaForCausalLM_input(Matrix3D input_ids_, std::vector> past_keys_, std::vector> past_values_) @@ -28,6 +34,17 @@ struct Int4LlamaForCausalLM_input { #endif : input_ids(input_ids_), past_keys(past_keys_), past_values(past_values_) { has_past_keys_values = true; + is_llava = false; + } + Int4LlamaForCausalLM_input(Matrix3D input_ids_, Matrix3D image_embed_, Matrix3D second_input_ids_) + : input_ids(input_ids_), image_embed(image_embed_), second_input_ids(second_input_ids_) { + has_past_keys_values = false; + is_llava = true; + } + Int4LlamaForCausalLM_input(Matrix3D input_ids_, Matrix3D image_embed_) + : input_ids(input_ids_), image_embed(image_embed_) { + has_past_keys_values = false; + is_llava = true; } }; diff --git a/llm/include/operators.h b/llm/include/operators.h index 38cc2e62..1123ed3a 100644 --- a/llm/include/operators.h +++ b/llm/include/operators.h @@ -23,12 +23,15 @@ extern int NUM_THREAD; #include "ops/W8A8BFP32OFP32Linear.h" #include "ops/arg_max.h" #include "ops/linear.h" +#include "ops/Conv2D.h" +#include "ops/Gelu.h" void softmax(const Matrix3D &input, Matrix3D &output, int dim); void batch_Add(const Matrix3D &input, const Matrix3D &input2, Matrix3D &output); template void linear(Matrix3D &a, Matrix3D &b, Matrix3D &c); + #ifdef QM_CUDA #include "ops/cuda/BMM_F16T.cuh" #include "ops/cuda/Embedding.cuh" diff --git a/llm/include/ops/Conv2D.h b/llm/include/ops/Conv2D.h new file mode 100644 index 00000000..c4172bed --- /dev/null +++ b/llm/include/ops/Conv2D.h @@ -0,0 +1,29 @@ +#include "common.h" +#include + +struct Conv2D_params { + Matrix4D weight; + Matrix3D bias; + int stride_width = 1; + int stride_height = 1; + int dilation_width_factor = 1; + int dilation_height_factor = 1; + int padding_width = 0; + int padding_height = 0; + float float_activation_min = -std::numeric_limits::max(); + float float_activation_max = std::numeric_limits::max(); +}; + +class Conv2D { + public: + Conv2D(Conv2D_params params_) : params(params_){}; + Conv2D(){}; + void forward(const Matrix3D &input, Matrix3D &output); + struct Conv2D_params params; + bool has_bias = false; + + private: + std::string profile_name = "Conv2D"; +}; + +void load_Conv2D(Conv2D &op, std::string prefix); diff --git a/llm/include/ops/Gelu.h b/llm/include/ops/Gelu.h new file mode 100644 index 00000000..c51b9d85 --- /dev/null +++ b/llm/include/ops/Gelu.h @@ -0,0 +1,6 @@ +#include "common.h" + +float Gelu_imp(float x); +void Gelu(Matrix3D a); +float Gelu_quick_imp(float x); +void Gelu_quick(Matrix3D a); diff --git a/llm/include/stb_image.h b/llm/include/stb_image.h new file mode 100644 index 00000000..4766d7e6 --- /dev/null +++ b/llm/include/stb_image.h @@ -0,0 +1,8396 @@ +/* stb_image - v2.28 - public domain image loader - http://nothings.org/stb + no warranty implied; use at your own risk + + Do this: + #define STB_IMAGE_IMPLEMENTATION + before you include this file in *one* C or C++ file to create the implementation. + + // i.e. it should look like this: + #include ... + #include ... + #include ... + #define STB_IMAGE_IMPLEMENTATION + #include "stb_image.h" + + You can #define STBI_ASSERT(x) before the #include to avoid using assert.h. + And #define STBI_MALLOC, STBI_REALLOC, and STBI_FREE to avoid using malloc,realloc,free + + + QUICK NOTES: + Primarily of interest to game developers and other people who can + avoid problematic images and only need the trivial interface + + JPEG baseline & progressive (12 bpc/arithmetic not supported, same as stock IJG lib) + PNG 1/2/4/8/16-bit-per-channel + + TGA (not sure what subset, if a subset) + BMP non-1bpp, non-RLE + PSD (composited view only, no extra channels, 8/16 bit-per-channel) + + GIF (*comp always reports as 4-channel) + HDR (radiance rgbE format) + PIC (Softimage PIC) + PNM (PPM and PGM binary only) + + Animated GIF still needs a proper API, but here's one way to do it: + http://gist.github.com/urraka/685d9a6340b26b830d49 + + - decode from memory or through FILE (define STBI_NO_STDIO to remove code) + - decode from arbitrary I/O callbacks + - SIMD acceleration on x86/x64 (SSE2) and ARM (NEON) + + Full documentation under "DOCUMENTATION" below. + + +LICENSE + + See end of file for license information. + +RECENT REVISION HISTORY: + + 2.28 (2023-01-29) many error fixes, security errors, just tons of stuff + 2.27 (2021-07-11) document stbi_info better, 16-bit PNM support, bug fixes + 2.26 (2020-07-13) many minor fixes + 2.25 (2020-02-02) fix warnings + 2.24 (2020-02-02) fix warnings; thread-local failure_reason and flip_vertically + 2.23 (2019-08-11) fix clang static analysis warning + 2.22 (2019-03-04) gif fixes, fix warnings + 2.21 (2019-02-25) fix typo in comment + 2.20 (2019-02-07) support utf8 filenames in Windows; fix warnings and platform ifdefs + 2.19 (2018-02-11) fix warning + 2.18 (2018-01-30) fix warnings + 2.17 (2018-01-29) bugfix, 1-bit BMP, 16-bitness query, fix warnings + 2.16 (2017-07-23) all functions have 16-bit variants; optimizations; bugfixes + 2.15 (2017-03-18) fix png-1,2,4; all Imagenet JPGs; no runtime SSE detection on GCC + 2.14 (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs + 2.13 (2016-12-04) experimental 16-bit API, only for PNG so far; fixes + 2.12 (2016-04-02) fix typo in 2.11 PSD fix that caused crashes + 2.11 (2016-04-02) 16-bit PNGS; enable SSE2 in non-gcc x64 + RGB-format JPEG; remove white matting in PSD; + allocate large structures on the stack; + correct channel count for PNG & BMP + 2.10 (2016-01-22) avoid warning introduced in 2.09 + 2.09 (2016-01-16) 16-bit TGA; comments in PNM files; STBI_REALLOC_SIZED + + See end of file for full revision history. + + + ============================ Contributors ========================= + + Image formats Extensions, features + Sean Barrett (jpeg, png, bmp) Jetro Lauha (stbi_info) + Nicolas Schulz (hdr, psd) Martin "SpartanJ" Golini (stbi_info) + Jonathan Dummer (tga) James "moose2000" Brown (iPhone PNG) + Jean-Marc Lienher (gif) Ben "Disch" Wenger (io callbacks) + Tom Seddon (pic) Omar Cornut (1/2/4-bit PNG) + Thatcher Ulrich (psd) Nicolas Guillemot (vertical flip) + Ken Miller (pgm, ppm) Richard Mitton (16-bit PSD) + github:urraka (animated gif) Junggon Kim (PNM comments) + Christopher Forseth (animated gif) Daniel Gibson (16-bit TGA) + socks-the-fox (16-bit PNG) + Jeremy Sawicki (handle all ImageNet JPGs) + Optimizations & bugfixes Mikhail Morozov (1-bit BMP) + Fabian "ryg" Giesen Anael Seghezzi (is-16-bit query) + Arseny Kapoulkine Simon Breuss (16-bit PNM) + John-Mark Allen + Carmelo J Fdez-Aguera + + Bug & warning fixes + Marc LeBlanc David Woo Guillaume George Martins Mozeiko + Christpher Lloyd Jerry Jansson Joseph Thomson Blazej Dariusz Roszkowski + Phil Jordan Dave Moore Roy Eltham + Hayaki Saito Nathan Reed Won Chun + Luke Graham Johan Duparc Nick Verigakis the Horde3D community + Thomas Ruf Ronny Chevalier github:rlyeh + Janez Zemva John Bartholomew Michal Cichon github:romigrou + Jonathan Blow Ken Hamada Tero Hanninen github:svdijk + Eugene Golushkov Laurent Gomila Cort Stratton github:snagar + Aruelien Pocheville Sergio Gonzalez Thibault Reuille github:Zelex + Cass Everitt Ryamond Barbiero github:grim210 + Paul Du Bois Engin Manap Aldo Culquicondor github:sammyhw + Philipp Wiesemann Dale Weiler Oriol Ferrer Mesia github:phprus + Josh Tobin Neil Bickford Matthew Gregan github:poppolopoppo + Julian Raschke Gregory Mullen Christian Floisand github:darealshinji + Baldur Karlsson Kevin Schmidt JR Smith github:Michaelangel007 + Brad Weinberger Matvey Cherevko github:mosra + Luca Sas Alexander Veselov Zack Middleton [reserved] + Ryan C. Gordon [reserved] [reserved] + DO NOT ADD YOUR NAME HERE + + Jacko Dirks + + To add your name to the credits, pick a random blank space in the middle and fill it. + 80% of merge conflicts on stb PRs are due to people adding their name at the end + of the credits. +*/ + +#ifndef STBI_INCLUDE_STB_IMAGE_H +#define STBI_INCLUDE_STB_IMAGE_H + +// DOCUMENTATION +// +// Limitations: +// - no 12-bit-per-channel JPEG +// - no JPEGs with arithmetic coding +// - GIF always returns *comp=4 +// +// Basic usage (see HDR discussion below for HDR usage): +// int x,y,n; +// unsigned char *data = stbi_load(filename, &x, &y, &n, 0); +// // ... process data if not NULL ... +// // ... x = width, y = height, n = # 8-bit components per pixel ... +// // ... replace '0' with '1'..'4' to force that many components per pixel +// // ... but 'n' will always be the number that it would have been if you said 0 +// stbi_image_free(data); +// +// Standard parameters: +// int *x -- outputs image width in pixels +// int *y -- outputs image height in pixels +// int *channels_in_file -- outputs # of image components in image file +// int desired_channels -- if non-zero, # of image components requested in result +// +// The return value from an image loader is an 'unsigned char *' which points +// to the pixel data, or NULL on an allocation failure or if the image is +// corrupt or invalid. The pixel data consists of *y scanlines of *x pixels, +// with each pixel consisting of N interleaved 8-bit components; the first +// pixel pointed to is top-left-most in the image. There is no padding between +// image scanlines or between pixels, regardless of format. The number of +// components N is 'desired_channels' if desired_channels is non-zero, or +// *channels_in_file otherwise. If desired_channels is non-zero, +// *channels_in_file has the number of components that _would_ have been +// output otherwise. E.g. if you set desired_channels to 4, you will always +// get RGBA output, but you can check *channels_in_file to see if it's trivially +// opaque because e.g. there were only 3 channels in the source image. +// +// An output image with N components has the following components interleaved +// in this order in each pixel: +// +// N=#comp components +// 1 grey +// 2 grey, alpha +// 3 red, green, blue +// 4 red, green, blue, alpha +// +// If image loading fails for any reason, the return value will be NULL, +// and *x, *y, *channels_in_file will be unchanged. The function +// stbi_failure_reason() can be queried for an extremely brief, end-user +// unfriendly explanation of why the load failed. Define STBI_NO_FAILURE_STRINGS +// to avoid compiling these strings at all, and STBI_FAILURE_USERMSG to get slightly +// more user-friendly ones. +// +// Paletted PNG, BMP, GIF, and PIC images are automatically depalettized. +// +// To query the width, height and component count of an image without having to +// decode the full file, you can use the stbi_info family of functions: +// +// int x,y,n,ok; +// ok = stbi_info(filename, &x, &y, &n); +// // returns ok=1 and sets x, y, n if image is a supported format, +// // 0 otherwise. +// +// Note that stb_image pervasively uses ints in its public API for sizes, +// including sizes of memory buffers. This is now part of the API and thus +// hard to change without causing breakage. As a result, the various image +// loaders all have certain limits on image size; these differ somewhat +// by format but generally boil down to either just under 2GB or just under +// 1GB. When the decoded image would be larger than this, stb_image decoding +// will fail. +// +// Additionally, stb_image will reject image files that have any of their +// dimensions set to a larger value than the configurable STBI_MAX_DIMENSIONS, +// which defaults to 2**24 = 16777216 pixels. Due to the above memory limit, +// the only way to have an image with such dimensions load correctly +// is for it to have a rather extreme aspect ratio. Either way, the +// assumption here is that such larger images are likely to be malformed +// or malicious. If you do need to load an image with individual dimensions +// larger than that, and it still fits in the overall size limit, you can +// #define STBI_MAX_DIMENSIONS on your own to be something larger. +// +// =========================================================================== +// +// UNICODE: +// +// If compiling for Windows and you wish to use Unicode filenames, compile +// with +// #define STBI_WINDOWS_UTF8 +// and pass utf8-encoded filenames. Call stbi_convert_wchar_to_utf8 to convert +// Windows wchar_t filenames to utf8. +// +// =========================================================================== +// +// Philosophy +// +// stb libraries are designed with the following priorities: +// +// 1. easy to use +// 2. easy to maintain +// 3. good performance +// +// Sometimes I let "good performance" creep up in priority over "easy to maintain", +// and for best performance I may provide less-easy-to-use APIs that give higher +// performance, in addition to the easy-to-use ones. Nevertheless, it's important +// to keep in mind that from the standpoint of you, a client of this library, +// all you care about is #1 and #3, and stb libraries DO NOT emphasize #3 above all. +// +// Some secondary priorities arise directly from the first two, some of which +// provide more explicit reasons why performance can't be emphasized. +// +// - Portable ("ease of use") +// - Small source code footprint ("easy to maintain") +// - No dependencies ("ease of use") +// +// =========================================================================== +// +// I/O callbacks +// +// I/O callbacks allow you to read from arbitrary sources, like packaged +// files or some other source. Data read from callbacks are processed +// through a small internal buffer (currently 128 bytes) to try to reduce +// overhead. +// +// The three functions you must define are "read" (reads some bytes of data), +// "skip" (skips some bytes of data), "eof" (reports if the stream is at the end). +// +// =========================================================================== +// +// SIMD support +// +// The JPEG decoder will try to automatically use SIMD kernels on x86 when +// supported by the compiler. For ARM Neon support, you must explicitly +// request it. +// +// (The old do-it-yourself SIMD API is no longer supported in the current +// code.) +// +// On x86, SSE2 will automatically be used when available based on a run-time +// test; if not, the generic C versions are used as a fall-back. On ARM targets, +// the typical path is to have separate builds for NEON and non-NEON devices +// (at least this is true for iOS and Android). Therefore, the NEON support is +// toggled by a build flag: define STBI_NEON to get NEON loops. +// +// If for some reason you do not want to use any of SIMD code, or if +// you have issues compiling it, you can disable it entirely by +// defining STBI_NO_SIMD. +// +// =========================================================================== +// +// HDR image support (disable by defining STBI_NO_HDR) +// +// stb_image supports loading HDR images in general, and currently the Radiance +// .HDR file format specifically. You can still load any file through the existing +// interface; if you attempt to load an HDR file, it will be automatically remapped +// to LDR, assuming gamma 2.2 and an arbitrary scale factor defaulting to 1; +// both of these constants can be reconfigured through this interface: +// +// stbi_hdr_to_ldr_gamma(2.2f); +// stbi_hdr_to_ldr_scale(1.0f); +// +// (note, do not use _inverse_ constants; stbi_image will invert them +// appropriately). +// +// Additionally, there is a new, parallel interface for loading files as +// (linear) floats to preserve the full dynamic range: +// +// float *data = stbi_loadf(filename, &x, &y, &n, 0); +// +// If you load LDR images through this interface, those images will +// be promoted to floating point values, run through the inverse of +// constants corresponding to the above: +// +// stbi_ldr_to_hdr_scale(1.0f); +// stbi_ldr_to_hdr_gamma(2.2f); +// +// Finally, given a filename (or an open file or memory block--see header +// file for details) containing image data, you can query for the "most +// appropriate" interface to use (that is, whether the image is HDR or +// not), using: +// +// stbi_is_hdr(char *filename); +// +// =========================================================================== +// +// iPhone PNG support: +// +// We optionally support converting iPhone-formatted PNGs (which store +// premultiplied BGRA) back to RGB, even though they're internally encoded +// differently. To enable this conversion, call +// stbi_convert_iphone_png_to_rgb(1). +// +// Call stbi_set_unpremultiply_on_load(1) as well to force a divide per +// pixel to remove any premultiplied alpha *only* if the image file explicitly +// says there's premultiplied data (currently only happens in iPhone images, +// and only if iPhone convert-to-rgb processing is on). +// +// =========================================================================== +// +// ADDITIONAL CONFIGURATION +// +// - You can suppress implementation of any of the decoders to reduce +// your code footprint by #defining one or more of the following +// symbols before creating the implementation. +// +// STBI_NO_JPEG +// STBI_NO_PNG +// STBI_NO_BMP +// STBI_NO_PSD +// STBI_NO_TGA +// STBI_NO_GIF +// STBI_NO_HDR +// STBI_NO_PIC +// STBI_NO_PNM (.ppm and .pgm) +// +// - You can request *only* certain decoders and suppress all other ones +// (this will be more forward-compatible, as addition of new decoders +// doesn't require you to disable them explicitly): +// +// STBI_ONLY_JPEG +// STBI_ONLY_PNG +// STBI_ONLY_BMP +// STBI_ONLY_PSD +// STBI_ONLY_TGA +// STBI_ONLY_GIF +// STBI_ONLY_HDR +// STBI_ONLY_PIC +// STBI_ONLY_PNM (.ppm and .pgm) +// +// - If you use STBI_NO_PNG (or _ONLY_ without PNG), and you still +// want the zlib decoder to be available, #define STBI_SUPPORT_ZLIB +// +// - If you define STBI_MAX_DIMENSIONS, stb_image will reject images greater +// than that size (in either width or height) without further processing. +// This is to let programs in the wild set an upper bound to prevent +// denial-of-service attacks on untrusted data, as one could generate a +// valid image of gigantic dimensions and force stb_image to allocate a +// huge block of memory and spend disproportionate time decoding it. By +// default this is set to (1 << 24), which is 16777216, but that's still +// very big. + +#ifndef STBI_NO_STDIO +#include +#endif // STBI_NO_STDIO + +#define STBI_VERSION 1 + +enum { + STBI_default = 0, // only used for desired_channels + + STBI_grey = 1, + STBI_grey_alpha = 2, + STBI_rgb = 3, + STBI_rgb_alpha = 4 +}; + +#include +typedef unsigned char stbi_uc; +typedef unsigned short stbi_us; + +#ifdef __cplusplus +extern "C" { +#endif + +#ifndef STBIDEF +#ifdef STB_IMAGE_STATIC +#define STBIDEF static +#else +#define STBIDEF extern +#endif +#endif + +////////////////////////////////////////////////////////////////////////////// +// +// PRIMARY API - works on images of any type +// + +// +// load image by filename, open file, or memory buffer +// + +typedef struct { + int (*read)(void * user, char * data, + int size); // fill 'data' with 'size' bytes. return number of bytes actually read + void (*skip)(void * user, int n); // skip the next 'n' bytes, or 'unget' the last -n bytes if negative + int (*eof)(void * user); // returns nonzero if we are at end of file/data +} stbi_io_callbacks; + +//////////////////////////////////// +// +// 8-bits-per-channel interface +// + +STBIDEF stbi_uc * stbi_load_from_memory(stbi_uc const * buffer, int len, int * x, int * y, int * channels_in_file, + int desired_channels); +STBIDEF stbi_uc * stbi_load_from_callbacks(stbi_io_callbacks const * clbk, void * user, int * x, int * y, + int * channels_in_file, int desired_channels); + +#ifndef STBI_NO_STDIO +STBIDEF stbi_uc * stbi_load(char const * filename, int * x, int * y, int * channels_in_file, int desired_channels); +STBIDEF stbi_uc * stbi_load_from_file(FILE * f, int * x, int * y, int * channels_in_file, int desired_channels); +// for stbi_load_from_file, file pointer is left pointing immediately after image +#endif + +#ifndef STBI_NO_GIF +STBIDEF stbi_uc * stbi_load_gif_from_memory(stbi_uc const * buffer, int len, int ** delays, int * x, int * y, int * z, + int * comp, int req_comp); +#endif + +#ifdef STBI_WINDOWS_UTF8 +STBIDEF int stbi_convert_wchar_to_utf8(char * buffer, size_t bufferlen, const wchar_t * input); +#endif + +//////////////////////////////////// +// +// 16-bits-per-channel interface +// + +STBIDEF stbi_us * stbi_load_16_from_memory(stbi_uc const * buffer, int len, int * x, int * y, int * channels_in_file, + int desired_channels); +STBIDEF stbi_us * stbi_load_16_from_callbacks(stbi_io_callbacks const * clbk, void * user, int * x, int * y, + int * channels_in_file, int desired_channels); + +#ifndef STBI_NO_STDIO +STBIDEF stbi_us * stbi_load_16(char const * filename, int * x, int * y, int * channels_in_file, int desired_channels); +STBIDEF stbi_us * stbi_load_from_file_16(FILE * f, int * x, int * y, int * channels_in_file, int desired_channels); +#endif + +//////////////////////////////////// +// +// float-per-channel interface +// +#ifndef STBI_NO_LINEAR +STBIDEF float * stbi_loadf_from_memory(stbi_uc const * buffer, int len, int * x, int * y, int * channels_in_file, + int desired_channels); +STBIDEF float * stbi_loadf_from_callbacks(stbi_io_callbacks const * clbk, void * user, int * x, int * y, int * channels_in_file, + int desired_channels); + +#ifndef STBI_NO_STDIO +STBIDEF float * stbi_loadf(char const * filename, int * x, int * y, int * channels_in_file, int desired_channels); +STBIDEF float * stbi_loadf_from_file(FILE * f, int * x, int * y, int * channels_in_file, int desired_channels); +#endif +#endif + +#ifndef STBI_NO_HDR +STBIDEF void stbi_hdr_to_ldr_gamma(float gamma); +STBIDEF void stbi_hdr_to_ldr_scale(float scale); +#endif // STBI_NO_HDR + +#ifndef STBI_NO_LINEAR +STBIDEF void stbi_ldr_to_hdr_gamma(float gamma); +STBIDEF void stbi_ldr_to_hdr_scale(float scale); +#endif // STBI_NO_LINEAR + +// stbi_is_hdr is always defined, but always returns false if STBI_NO_HDR +STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const * clbk, void * user); +STBIDEF int stbi_is_hdr_from_memory(stbi_uc const * buffer, int len); +#ifndef STBI_NO_STDIO +STBIDEF int stbi_is_hdr(char const * filename); +STBIDEF int stbi_is_hdr_from_file(FILE * f); +#endif // STBI_NO_STDIO + +// get a VERY brief reason for failure +// on most compilers (and ALL modern mainstream compilers) this is threadsafe +STBIDEF const char * stbi_failure_reason(void); + +// free the loaded image -- this is just free() +STBIDEF void stbi_image_free(void * retval_from_stbi_load); + +// get image dimensions & components without fully decoding +STBIDEF int stbi_info_from_memory(stbi_uc const * buffer, int len, int * x, int * y, int * comp); +STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const * clbk, void * user, int * x, int * y, int * comp); +STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const * buffer, int len); +STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const * clbk, void * user); + +#ifndef STBI_NO_STDIO +STBIDEF int stbi_info(char const * filename, int * x, int * y, int * comp); +STBIDEF int stbi_info_from_file(FILE * f, int * x, int * y, int * comp); +STBIDEF int stbi_is_16_bit(char const * filename); +STBIDEF int stbi_is_16_bit_from_file(FILE * f); +#endif + +// for image formats that explicitly notate that they have premultiplied alpha, +// we just return the colors as stored in the file. set this flag to force +// unpremultiplication. results are undefined if the unpremultiply overflow. +STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply); + +// indicate whether we should process iphone images back to canonical format, +// or just pass them through "as-is" +STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert); + +// flip the image vertically, so the first pixel in the output array is the bottom left +STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip); + +// as above, but only applies to images loaded on the thread that calls the function +// this function is only available if your compiler supports thread-local variables; +// calling it will fail to link if your compiler doesn't +STBIDEF void stbi_set_unpremultiply_on_load_thread(int flag_true_if_should_unpremultiply); +STBIDEF void stbi_convert_iphone_png_to_rgb_thread(int flag_true_if_should_convert); +STBIDEF void stbi_set_flip_vertically_on_load_thread(int flag_true_if_should_flip); + +// ZLIB client - used by PNG, available for other purposes + +STBIDEF char * stbi_zlib_decode_malloc_guesssize(const char * buffer, int len, int initial_size, int * outlen); +STBIDEF char * stbi_zlib_decode_malloc_guesssize_headerflag(const char * buffer, int len, int initial_size, int * outlen, + int parse_header); +STBIDEF char * stbi_zlib_decode_malloc(const char * buffer, int len, int * outlen); +STBIDEF int stbi_zlib_decode_buffer(char * obuffer, int olen, const char * ibuffer, int ilen); + +STBIDEF char * stbi_zlib_decode_noheader_malloc(const char * buffer, int len, int * outlen); +STBIDEF int stbi_zlib_decode_noheader_buffer(char * obuffer, int olen, const char * ibuffer, int ilen); + +#ifdef __cplusplus +} +#endif + +// +// +//// end header file ///////////////////////////////////////////////////// +#endif // STBI_INCLUDE_STB_IMAGE_H + +#ifdef STB_IMAGE_IMPLEMENTATION + +#if defined(STBI_ONLY_JPEG) || defined(STBI_ONLY_PNG) || defined(STBI_ONLY_BMP) || defined(STBI_ONLY_TGA) || \ + defined(STBI_ONLY_GIF) || defined(STBI_ONLY_PSD) || defined(STBI_ONLY_HDR) || defined(STBI_ONLY_PIC) || \ + defined(STBI_ONLY_PNM) || defined(STBI_ONLY_ZLIB) +#ifndef STBI_ONLY_JPEG +#define STBI_NO_JPEG +#endif +#ifndef STBI_ONLY_PNG +#define STBI_NO_PNG +#endif +#ifndef STBI_ONLY_BMP +#define STBI_NO_BMP +#endif +#ifndef STBI_ONLY_PSD +#define STBI_NO_PSD +#endif +#ifndef STBI_ONLY_TGA +#define STBI_NO_TGA +#endif +#ifndef STBI_ONLY_GIF +#define STBI_NO_GIF +#endif +#ifndef STBI_ONLY_HDR +#define STBI_NO_HDR +#endif +#ifndef STBI_ONLY_PIC +#define STBI_NO_PIC +#endif +#ifndef STBI_ONLY_PNM +#define STBI_NO_PNM +#endif +#endif + +#if defined(STBI_NO_PNG) && !defined(STBI_SUPPORT_ZLIB) && !defined(STBI_NO_ZLIB) +#define STBI_NO_ZLIB +#endif + +#include +#include +#include // ptrdiff_t on osx +#include +#include + +#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) +#include // ldexp, pow +#endif + +#ifndef STBI_NO_STDIO +#include +#endif + +#ifndef STBI_ASSERT +#include +#define STBI_ASSERT(x) assert(x) +#endif + +#ifdef __cplusplus +#define STBI_EXTERN extern "C" +#else +#define STBI_EXTERN extern +#endif + +#ifndef _MSC_VER +#ifdef __cplusplus +#define stbi_inline inline +#else +#define stbi_inline +#endif +#else +#define stbi_inline __forceinline +#endif + +#ifndef STBI_NO_THREAD_LOCALS +#if defined(__cplusplus) && __cplusplus >= 201103L +#define STBI_THREAD_LOCAL thread_local +#elif defined(__GNUC__) && __GNUC__ < 5 +#define STBI_THREAD_LOCAL __thread +#elif defined(_MSC_VER) +#define STBI_THREAD_LOCAL __declspec(thread) +#elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L && !defined(__STDC_NO_THREADS__) +#define STBI_THREAD_LOCAL _Thread_local +#endif + +#ifndef STBI_THREAD_LOCAL +#if defined(__GNUC__) +#define STBI_THREAD_LOCAL __thread +#endif +#endif +#endif + +#if defined(_MSC_VER) || defined(__SYMBIAN32__) +typedef unsigned short stbi__uint16; +typedef signed short stbi__int16; +typedef unsigned int stbi__uint32; +typedef signed int stbi__int32; +#else +#include +typedef uint16_t stbi__uint16; +typedef int16_t stbi__int16; +typedef uint32_t stbi__uint32; +typedef int32_t stbi__int32; +#endif + +// should produce compiler error if size is wrong +typedef unsigned char validate_uint32[sizeof(stbi__uint32) == 4 ? 1 : -1]; + +#ifdef _MSC_VER +#define STBI_NOTUSED(v) (void)(v) +#else +#define STBI_NOTUSED(v) (void)sizeof(v) +#endif + +#ifdef _MSC_VER +#define STBI_HAS_LROTL +#endif + +#ifdef STBI_HAS_LROTL +#define stbi_lrot(x, y) _lrotl(x, y) +#else +#define stbi_lrot(x, y) (((x) << (y)) | ((x) >> (-(y)&31))) +#endif + +#if defined(STBI_MALLOC) && defined(STBI_FREE) && (defined(STBI_REALLOC) || defined(STBI_REALLOC_SIZED)) +// ok +#elif !defined(STBI_MALLOC) && !defined(STBI_FREE) && !defined(STBI_REALLOC) && !defined(STBI_REALLOC_SIZED) +// ok +#else +#error "Must define all or none of STBI_MALLOC, STBI_FREE, and STBI_REALLOC (or STBI_REALLOC_SIZED)." +#endif + +#ifndef STBI_MALLOC +#define STBI_MALLOC(sz) malloc(sz) +#define STBI_REALLOC(p, newsz) realloc(p, newsz) +#define STBI_FREE(p) free(p) +#endif + +#ifndef STBI_REALLOC_SIZED +#define STBI_REALLOC_SIZED(p, oldsz, newsz) STBI_REALLOC(p, newsz) +#endif + +// x86/x64 detection +#if defined(__x86_64__) || defined(_M_X64) +#define STBI__X64_TARGET +#elif defined(__i386) || defined(_M_IX86) +#define STBI__X86_TARGET +#endif + +#if defined(__GNUC__) && defined(STBI__X86_TARGET) && !defined(__SSE2__) && !defined(STBI_NO_SIMD) +// gcc doesn't support sse2 intrinsics unless you compile with -msse2, +// which in turn means it gets to use SSE2 everywhere. This is unfortunate, +// but previous attempts to provide the SSE2 functions with runtime +// detection caused numerous issues. The way architecture extensions are +// exposed in GCC/Clang is, sadly, not really suited for one-file libs. +// New behavior: if compiled with -msse2, we use SSE2 without any +// detection; if not, we don't use it at all. +#define STBI_NO_SIMD +#endif + +#if defined(__MINGW32__) && defined(STBI__X86_TARGET) && !defined(STBI_MINGW_ENABLE_SSE2) && !defined(STBI_NO_SIMD) +// Note that __MINGW32__ doesn't actually mean 32-bit, so we have to avoid STBI__X64_TARGET +// +// 32-bit MinGW wants ESP to be 16-byte aligned, but this is not in the +// Windows ABI and VC++ as well as Windows DLLs don't maintain that invariant. +// As a result, enabling SSE2 on 32-bit MinGW is dangerous when not +// simultaneously enabling "-mstackrealign". +// +// See https://github.com/nothings/stb/issues/81 for more information. +// +// So default to no SSE2 on 32-bit MinGW. If you've read this far and added +// -mstackrealign to your build settings, feel free to #define STBI_MINGW_ENABLE_SSE2. +#define STBI_NO_SIMD +#endif + +#if !defined(STBI_NO_SIMD) && (defined(STBI__X86_TARGET) || defined(STBI__X64_TARGET)) +#define STBI_SSE2 +#include + +#ifdef _MSC_VER + +#if _MSC_VER >= 1400 // not VC6 +#include // __cpuid +static int stbi__cpuid3(void) { + int info[4]; + __cpuid(info, 1); + return info[3]; +} +#else +static int stbi__cpuid3(void) { + int res; + __asm { + mov eax,1 + cpuid + mov res,edx + } + return res; +} +#endif + +#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name + +#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2) +static int stbi__sse2_available(void) { + int info3 = stbi__cpuid3(); + return ((info3 >> 26) & 1) != 0; +} +#endif + +#else // assume GCC-style if not VC++ +#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16))) + +#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2) +static int stbi__sse2_available(void) { + // If we're even attempting to compile this on GCC/Clang, that means + // -msse2 is on, which means the compiler is allowed to use SSE2 + // instructions at will, and so are we. + return 1; +} +#endif + +#endif +#endif + +// ARM NEON +#if defined(STBI_NO_SIMD) && defined(STBI_NEON) +#undef STBI_NEON +#endif + +#ifdef STBI_NEON +#include +#ifdef _MSC_VER +#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name +#else +#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16))) +#endif +#endif + +#ifndef STBI_SIMD_ALIGN +#define STBI_SIMD_ALIGN(type, name) type name +#endif + +#ifndef STBI_MAX_DIMENSIONS +#define STBI_MAX_DIMENSIONS (1 << 24) +#endif + +/////////////////////////////////////////////// +// +// stbi__context struct and start_xxx functions + +// stbi__context structure is our basic context used by all images, so it +// contains all the IO context, plus some basic image information +typedef struct { + stbi__uint32 img_x, img_y; + int img_n, img_out_n; + + stbi_io_callbacks io; + void * io_user_data; + + int read_from_callbacks; + int buflen; + stbi_uc buffer_start[128]; + int callback_already_read; + + stbi_uc *img_buffer, *img_buffer_end; + stbi_uc *img_buffer_original, *img_buffer_original_end; +} stbi__context; + +static void stbi__refill_buffer(stbi__context * s); + +// initialize a memory-decode context +static void stbi__start_mem(stbi__context * s, stbi_uc const * buffer, int len) { + s->io.read = NULL; + s->read_from_callbacks = 0; + s->callback_already_read = 0; + s->img_buffer = s->img_buffer_original = (stbi_uc *)buffer; + s->img_buffer_end = s->img_buffer_original_end = (stbi_uc *)buffer + len; +} + +// initialize a callback-based context +static void stbi__start_callbacks(stbi__context * s, stbi_io_callbacks * c, void * user) { + s->io = *c; + s->io_user_data = user; + s->buflen = sizeof(s->buffer_start); + s->read_from_callbacks = 1; + s->callback_already_read = 0; + s->img_buffer = s->img_buffer_original = s->buffer_start; + stbi__refill_buffer(s); + s->img_buffer_original_end = s->img_buffer_end; +} + +#ifndef STBI_NO_STDIO + +static int stbi__stdio_read(void * user, char * data, int size) { return (int)fread(data, 1, size, (FILE *)user); } + +static void stbi__stdio_skip(void * user, int n) { + int ch; + fseek((FILE *)user, n, SEEK_CUR); + ch = fgetc((FILE *)user); /* have to read a byte to reset feof()'s flag */ + if (ch != EOF) { + ungetc(ch, (FILE *)user); /* push byte back onto stream if valid. */ + } +} + +static int stbi__stdio_eof(void * user) { return feof((FILE *)user) || ferror((FILE *)user); } + +static stbi_io_callbacks stbi__stdio_callbacks = { + stbi__stdio_read, + stbi__stdio_skip, + stbi__stdio_eof, +}; + +static void stbi__start_file(stbi__context * s, FILE * f) { stbi__start_callbacks(s, &stbi__stdio_callbacks, (void *)f); } + +// static void stop_file(stbi__context *s) { } + +#endif // !STBI_NO_STDIO + +static void stbi__rewind(stbi__context * s) { + // conceptually rewind SHOULD rewind to the beginning of the stream, + // but we just rewind to the beginning of the initial buffer, because + // we only use it after doing 'test', which only ever looks at at most 92 bytes + s->img_buffer = s->img_buffer_original; + s->img_buffer_end = s->img_buffer_original_end; +} + +enum { STBI_ORDER_RGB, STBI_ORDER_BGR }; + +typedef struct { + int bits_per_channel; + int num_channels; + int channel_order; +} stbi__result_info; + +#ifndef STBI_NO_JPEG +static int stbi__jpeg_test(stbi__context * s); +static void * stbi__jpeg_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri); +static int stbi__jpeg_info(stbi__context * s, int * x, int * y, int * comp); +#endif + +#ifndef STBI_NO_PNG +static int stbi__png_test(stbi__context * s); +static void * stbi__png_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri); +static int stbi__png_info(stbi__context * s, int * x, int * y, int * comp); +static int stbi__png_is16(stbi__context * s); +#endif + +#ifndef STBI_NO_BMP +static int stbi__bmp_test(stbi__context * s); +static void * stbi__bmp_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri); +static int stbi__bmp_info(stbi__context * s, int * x, int * y, int * comp); +#endif + +#ifndef STBI_NO_TGA +static int stbi__tga_test(stbi__context * s); +static void * stbi__tga_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri); +static int stbi__tga_info(stbi__context * s, int * x, int * y, int * comp); +#endif + +#ifndef STBI_NO_PSD +static int stbi__psd_test(stbi__context * s); +static void * stbi__psd_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri, int bpc); +static int stbi__psd_info(stbi__context * s, int * x, int * y, int * comp); +static int stbi__psd_is16(stbi__context * s); +#endif + +#ifndef STBI_NO_HDR +static int stbi__hdr_test(stbi__context * s); +static float * stbi__hdr_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri); +static int stbi__hdr_info(stbi__context * s, int * x, int * y, int * comp); +#endif + +#ifndef STBI_NO_PIC +static int stbi__pic_test(stbi__context * s); +static void * stbi__pic_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri); +static int stbi__pic_info(stbi__context * s, int * x, int * y, int * comp); +#endif + +#ifndef STBI_NO_GIF +static int stbi__gif_test(stbi__context * s); +static void * stbi__gif_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri); +static void * stbi__load_gif_main(stbi__context * s, int ** delays, int * x, int * y, int * z, int * comp, int req_comp); +static int stbi__gif_info(stbi__context * s, int * x, int * y, int * comp); +#endif + +#ifndef STBI_NO_PNM +static int stbi__pnm_test(stbi__context * s); +static void * stbi__pnm_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri); +static int stbi__pnm_info(stbi__context * s, int * x, int * y, int * comp); +static int stbi__pnm_is16(stbi__context * s); +#endif + +static +#ifdef STBI_THREAD_LOCAL + STBI_THREAD_LOCAL +#endif + const char * stbi__g_failure_reason; + +STBIDEF const char * stbi_failure_reason(void) { return stbi__g_failure_reason; } + +#ifndef STBI_NO_FAILURE_STRINGS +static int stbi__err(const char * str) { + stbi__g_failure_reason = str; + return 0; +} +#endif + +static void * stbi__malloc(size_t size) { return STBI_MALLOC(size); } + +// stb_image uses ints pervasively, including for offset calculations. +// therefore the largest decoded image size we can support with the +// current code, even on 64-bit targets, is INT_MAX. this is not a +// significant limitation for the intended use case. +// +// we do, however, need to make sure our size calculations don't +// overflow. hence a few helper functions for size calculations that +// multiply integers together, making sure that they're non-negative +// and no overflow occurs. + +// return 1 if the sum is valid, 0 on overflow. +// negative terms are considered invalid. +static int stbi__addsizes_valid(int a, int b) { + if (b < 0) + return 0; + // now 0 <= b <= INT_MAX, hence also + // 0 <= INT_MAX - b <= INTMAX. + // And "a + b <= INT_MAX" (which might overflow) is the + // same as a <= INT_MAX - b (no overflow) + return a <= INT_MAX - b; +} + +// returns 1 if the product is valid, 0 on overflow. +// negative factors are considered invalid. +static int stbi__mul2sizes_valid(int a, int b) { + if (a < 0 || b < 0) + return 0; + if (b == 0) + return 1; // mul-by-0 is always safe + // portable way to check for no overflows in a*b + return a <= INT_MAX / b; +} + +#if !defined(STBI_NO_JPEG) || !defined(STBI_NO_PNG) || !defined(STBI_NO_TGA) || !defined(STBI_NO_HDR) +// returns 1 if "a*b + add" has no negative terms/factors and doesn't overflow +static int stbi__mad2sizes_valid(int a, int b, int add) { + return stbi__mul2sizes_valid(a, b) && stbi__addsizes_valid(a * b, add); +} +#endif + +// returns 1 if "a*b*c + add" has no negative terms/factors and doesn't overflow +static int stbi__mad3sizes_valid(int a, int b, int c, int add) { + return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a * b, c) && stbi__addsizes_valid(a * b * c, add); +} + +// returns 1 if "a*b*c*d + add" has no negative terms/factors and doesn't overflow +#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) || !defined(STBI_NO_PNM) +static int stbi__mad4sizes_valid(int a, int b, int c, int d, int add) { + return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a * b, c) && stbi__mul2sizes_valid(a * b * c, d) && + stbi__addsizes_valid(a * b * c * d, add); +} +#endif + +#if !defined(STBI_NO_JPEG) || !defined(STBI_NO_PNG) || !defined(STBI_NO_TGA) || !defined(STBI_NO_HDR) +// mallocs with size overflow checking +static void * stbi__malloc_mad2(int a, int b, int add) { + if (!stbi__mad2sizes_valid(a, b, add)) + return NULL; + return stbi__malloc(a * b + add); +} +#endif + +static void * stbi__malloc_mad3(int a, int b, int c, int add) { + if (!stbi__mad3sizes_valid(a, b, c, add)) + return NULL; + return stbi__malloc(a * b * c + add); +} + +#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) || !defined(STBI_NO_PNM) +static void * stbi__malloc_mad4(int a, int b, int c, int d, int add) { + if (!stbi__mad4sizes_valid(a, b, c, d, add)) + return NULL; + return stbi__malloc(a * b * c * d + add); +} +#endif + +// returns 1 if the sum of two signed ints is valid (between -2^31 and 2^31-1 inclusive), 0 on overflow. +static int stbi__addints_valid(int a, int b) { + if ((a >= 0) != (b >= 0)) + return 1; // a and b have different signs, so no overflow + if (a < 0 && b < 0) + return a >= INT_MIN - b; // same as a + b >= INT_MIN; INT_MIN - b cannot overflow since b < 0. + return a <= INT_MAX - b; +} + +// returns 1 if the product of two signed shorts is valid, 0 on overflow. +static int stbi__mul2shorts_valid(short a, short b) { + if (b == 0 || b == -1) + return 1; // multiplication by 0 is always 0; check for -1 so SHRT_MIN/b doesn't overflow + if ((a >= 0) == (b >= 0)) + return a <= SHRT_MAX / b; // product is positive, so similar to mul2sizes_valid + if (b < 0) + return a <= SHRT_MIN / b; // same as a * b >= SHRT_MIN + return a >= SHRT_MIN / b; +} + +// stbi__err - error +// stbi__errpf - error returning pointer to float +// stbi__errpuc - error returning pointer to unsigned char + +#ifdef STBI_NO_FAILURE_STRINGS +#define stbi__err(x, y) 0 +#elif defined(STBI_FAILURE_USERMSG) +#define stbi__err(x, y) stbi__err(y) +#else +#define stbi__err(x, y) stbi__err(x) +#endif + +#define stbi__errpf(x, y) ((float *)(size_t)(stbi__err(x, y) ? NULL : NULL)) +#define stbi__errpuc(x, y) ((unsigned char *)(size_t)(stbi__err(x, y) ? NULL : NULL)) + +STBIDEF void stbi_image_free(void * retval_from_stbi_load) { STBI_FREE(retval_from_stbi_load); } + +#ifndef STBI_NO_LINEAR +static float * stbi__ldr_to_hdr(stbi_uc * data, int x, int y, int comp); +#endif + +#ifndef STBI_NO_HDR +static stbi_uc * stbi__hdr_to_ldr(float * data, int x, int y, int comp); +#endif + +static int stbi__vertically_flip_on_load_global = 0; + +STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip) { + stbi__vertically_flip_on_load_global = flag_true_if_should_flip; +} + +#ifndef STBI_THREAD_LOCAL +#define stbi__vertically_flip_on_load stbi__vertically_flip_on_load_global +#else +static STBI_THREAD_LOCAL int stbi__vertically_flip_on_load_local, stbi__vertically_flip_on_load_set; + +STBIDEF void stbi_set_flip_vertically_on_load_thread(int flag_true_if_should_flip) { + stbi__vertically_flip_on_load_local = flag_true_if_should_flip; + stbi__vertically_flip_on_load_set = 1; +} + +#define stbi__vertically_flip_on_load \ + (stbi__vertically_flip_on_load_set ? stbi__vertically_flip_on_load_local : stbi__vertically_flip_on_load_global) +#endif // STBI_THREAD_LOCAL + +static void * stbi__load_main(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri, int bpc) { + memset(ri, 0, sizeof(*ri)); // make sure it's initialized if we add new fields + ri->bits_per_channel = 8; // default is 8 so most paths don't have to be changed + ri->channel_order = STBI_ORDER_RGB; // all current input & output are this, but this is here so we can add BGR order + ri->num_channels = 0; + +// test the formats with a very explicit header first (at least a FOURCC +// or distinctive magic number first) +#ifndef STBI_NO_PNG + if (stbi__png_test(s)) + return stbi__png_load(s, x, y, comp, req_comp, ri); +#endif +#ifndef STBI_NO_BMP + if (stbi__bmp_test(s)) + return stbi__bmp_load(s, x, y, comp, req_comp, ri); +#endif +#ifndef STBI_NO_GIF + if (stbi__gif_test(s)) + return stbi__gif_load(s, x, y, comp, req_comp, ri); +#endif +#ifndef STBI_NO_PSD + if (stbi__psd_test(s)) + return stbi__psd_load(s, x, y, comp, req_comp, ri, bpc); +#else + STBI_NOTUSED(bpc); +#endif +#ifndef STBI_NO_PIC + if (stbi__pic_test(s)) + return stbi__pic_load(s, x, y, comp, req_comp, ri); +#endif + +// then the formats that can end up attempting to load with just 1 or 2 +// bytes matching expectations; these are prone to false positives, so +// try them later +#ifndef STBI_NO_JPEG + if (stbi__jpeg_test(s)) + return stbi__jpeg_load(s, x, y, comp, req_comp, ri); +#endif +#ifndef STBI_NO_PNM + if (stbi__pnm_test(s)) + return stbi__pnm_load(s, x, y, comp, req_comp, ri); +#endif + +#ifndef STBI_NO_HDR + if (stbi__hdr_test(s)) { + float * hdr = stbi__hdr_load(s, x, y, comp, req_comp, ri); + return stbi__hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp); + } +#endif + +#ifndef STBI_NO_TGA + // test tga last because it's a crappy test! + if (stbi__tga_test(s)) + return stbi__tga_load(s, x, y, comp, req_comp, ri); +#endif + + return stbi__errpuc("unknown image type", "Image not of any known type, or corrupt"); +} + +static stbi_uc * stbi__convert_16_to_8(stbi__uint16 * orig, int w, int h, int channels) { + int i; + int img_len = w * h * channels; + stbi_uc * reduced; + + reduced = (stbi_uc *)stbi__malloc(img_len); + if (reduced == NULL) + return stbi__errpuc("outofmem", "Out of memory"); + + for (i = 0; i < img_len; ++i) + reduced[i] = (stbi_uc)((orig[i] >> 8) & 0xFF); // top half of each byte is sufficient approx of 16->8 bit scaling + + STBI_FREE(orig); + return reduced; +} + +static stbi__uint16 * stbi__convert_8_to_16(stbi_uc * orig, int w, int h, int channels) { + int i; + int img_len = w * h * channels; + stbi__uint16 * enlarged; + + enlarged = (stbi__uint16 *)stbi__malloc(img_len * 2); + if (enlarged == NULL) + return (stbi__uint16 *)stbi__errpuc("outofmem", "Out of memory"); + + for (i = 0; i < img_len; ++i) + enlarged[i] = (stbi__uint16)((orig[i] << 8) + orig[i]); // replicate to high and low byte, maps 0->0, 255->0xffff + + STBI_FREE(orig); + return enlarged; +} + +static void stbi__vertical_flip(void * image, int w, int h, int bytes_per_pixel) { + int row; + size_t bytes_per_row = (size_t)w * bytes_per_pixel; + stbi_uc temp[2048]; + stbi_uc * bytes = (stbi_uc *)image; + + for (row = 0; row < (h >> 1); row++) { + stbi_uc * row0 = bytes + row * bytes_per_row; + stbi_uc * row1 = bytes + (h - row - 1) * bytes_per_row; + // swap row0 with row1 + size_t bytes_left = bytes_per_row; + while (bytes_left) { + size_t bytes_copy = (bytes_left < sizeof(temp)) ? bytes_left : sizeof(temp); + memcpy(temp, row0, bytes_copy); + memcpy(row0, row1, bytes_copy); + memcpy(row1, temp, bytes_copy); + row0 += bytes_copy; + row1 += bytes_copy; + bytes_left -= bytes_copy; + } + } +} + +#ifndef STBI_NO_GIF +static void stbi__vertical_flip_slices(void * image, int w, int h, int z, int bytes_per_pixel) { + int slice; + int slice_size = w * h * bytes_per_pixel; + + stbi_uc * bytes = (stbi_uc *)image; + for (slice = 0; slice < z; ++slice) { + stbi__vertical_flip(bytes, w, h, bytes_per_pixel); + bytes += slice_size; + } +} +#endif + +static unsigned char * stbi__load_and_postprocess_8bit(stbi__context * s, int * x, int * y, int * comp, int req_comp) { + stbi__result_info ri; + void * result = stbi__load_main(s, x, y, comp, req_comp, &ri, 8); + + if (result == NULL) + return NULL; + + // it is the responsibility of the loaders to make sure we get either 8 or 16 bit. + STBI_ASSERT(ri.bits_per_channel == 8 || ri.bits_per_channel == 16); + + if (ri.bits_per_channel != 8) { + result = stbi__convert_16_to_8((stbi__uint16 *)result, *x, *y, req_comp == 0 ? *comp : req_comp); + ri.bits_per_channel = 8; + } + + // @TODO: move stbi__convert_format to here + + if (stbi__vertically_flip_on_load) { + int channels = req_comp ? req_comp : *comp; + stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi_uc)); + } + + return (unsigned char *)result; +} + +static stbi__uint16 * stbi__load_and_postprocess_16bit(stbi__context * s, int * x, int * y, int * comp, int req_comp) { + stbi__result_info ri; + void * result = stbi__load_main(s, x, y, comp, req_comp, &ri, 16); + + if (result == NULL) + return NULL; + + // it is the responsibility of the loaders to make sure we get either 8 or 16 bit. + STBI_ASSERT(ri.bits_per_channel == 8 || ri.bits_per_channel == 16); + + if (ri.bits_per_channel != 16) { + result = stbi__convert_8_to_16((stbi_uc *)result, *x, *y, req_comp == 0 ? *comp : req_comp); + ri.bits_per_channel = 16; + } + + // @TODO: move stbi__convert_format16 to here + // @TODO: special case RGB-to-Y (and RGBA-to-YA) for 8-bit-to-16-bit case to keep more precision + + if (stbi__vertically_flip_on_load) { + int channels = req_comp ? req_comp : *comp; + stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi__uint16)); + } + + return (stbi__uint16 *)result; +} + +#if !defined(STBI_NO_HDR) && !defined(STBI_NO_LINEAR) +static void stbi__float_postprocess(float * result, int * x, int * y, int * comp, int req_comp) { + if (stbi__vertically_flip_on_load && result != NULL) { + int channels = req_comp ? req_comp : *comp; + stbi__vertical_flip(result, *x, *y, channels * sizeof(float)); + } +} +#endif + +#ifndef STBI_NO_STDIO + +#if defined(_WIN32) && defined(STBI_WINDOWS_UTF8) +STBI_EXTERN __declspec(dllimport) int __stdcall MultiByteToWideChar(unsigned int cp, unsigned long flags, const char * str, + int cbmb, wchar_t * widestr, int cchwide); +STBI_EXTERN __declspec(dllimport) int __stdcall WideCharToMultiByte(unsigned int cp, unsigned long flags, + const wchar_t * widestr, int cchwide, char * str, int cbmb, + const char * defchar, int * used_default); +#endif + +#if defined(_WIN32) && defined(STBI_WINDOWS_UTF8) +STBIDEF int stbi_convert_wchar_to_utf8(char * buffer, size_t bufferlen, const wchar_t * input) { + return WideCharToMultiByte(65001 /* UTF8 */, 0, input, -1, buffer, (int)bufferlen, NULL, NULL); +} +#endif + +static FILE * stbi__fopen(char const * filename, char const * mode) { + FILE * f; +#if defined(_WIN32) && defined(STBI_WINDOWS_UTF8) + wchar_t wMode[64]; + wchar_t wFilename[1024]; + if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof(wFilename) / sizeof(*wFilename))) + return 0; + + if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, mode, -1, wMode, sizeof(wMode) / sizeof(*wMode))) + return 0; + +#if defined(_MSC_VER) && _MSC_VER >= 1400 + if (0 != _wfopen_s(&f, wFilename, wMode)) + f = 0; +#else + f = _wfopen(wFilename, wMode); +#endif + +#elif defined(_MSC_VER) && _MSC_VER >= 1400 + if (0 != fopen_s(&f, filename, mode)) + f = 0; +#else + f = fopen(filename, mode); +#endif + return f; +} + +STBIDEF stbi_uc * stbi_load(char const * filename, int * x, int * y, int * comp, int req_comp) { + FILE * f = stbi__fopen(filename, "rb"); + unsigned char * result; + if (!f) + return stbi__errpuc("can't fopen", "Unable to open file"); + result = stbi_load_from_file(f, x, y, comp, req_comp); + fclose(f); + return result; +} + +STBIDEF stbi_uc * stbi_load_from_file(FILE * f, int * x, int * y, int * comp, int req_comp) { + unsigned char * result; + stbi__context s; + stbi__start_file(&s, f); + result = stbi__load_and_postprocess_8bit(&s, x, y, comp, req_comp); + if (result) { + // need to 'unget' all the characters in the IO buffer + fseek(f, -(int)(s.img_buffer_end - s.img_buffer), SEEK_CUR); + } + return result; +} + +STBIDEF stbi__uint16 * stbi_load_from_file_16(FILE * f, int * x, int * y, int * comp, int req_comp) { + stbi__uint16 * result; + stbi__context s; + stbi__start_file(&s, f); + result = stbi__load_and_postprocess_16bit(&s, x, y, comp, req_comp); + if (result) { + // need to 'unget' all the characters in the IO buffer + fseek(f, -(int)(s.img_buffer_end - s.img_buffer), SEEK_CUR); + } + return result; +} + +STBIDEF stbi_us * stbi_load_16(char const * filename, int * x, int * y, int * comp, int req_comp) { + FILE * f = stbi__fopen(filename, "rb"); + stbi__uint16 * result; + if (!f) + return (stbi_us *)stbi__errpuc("can't fopen", "Unable to open file"); + result = stbi_load_from_file_16(f, x, y, comp, req_comp); + fclose(f); + return result; +} + +#endif //! STBI_NO_STDIO + +STBIDEF stbi_us * stbi_load_16_from_memory(stbi_uc const * buffer, int len, int * x, int * y, int * channels_in_file, + int desired_channels) { + stbi__context s; + stbi__start_mem(&s, buffer, len); + return stbi__load_and_postprocess_16bit(&s, x, y, channels_in_file, desired_channels); +} + +STBIDEF stbi_us * stbi_load_16_from_callbacks(stbi_io_callbacks const * clbk, void * user, int * x, int * y, + int * channels_in_file, int desired_channels) { + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *)clbk, user); + return stbi__load_and_postprocess_16bit(&s, x, y, channels_in_file, desired_channels); +} + +STBIDEF stbi_uc * stbi_load_from_memory(stbi_uc const * buffer, int len, int * x, int * y, int * comp, int req_comp) { + stbi__context s; + stbi__start_mem(&s, buffer, len); + return stbi__load_and_postprocess_8bit(&s, x, y, comp, req_comp); +} + +STBIDEF stbi_uc * stbi_load_from_callbacks(stbi_io_callbacks const * clbk, void * user, int * x, int * y, int * comp, + int req_comp) { + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *)clbk, user); + return stbi__load_and_postprocess_8bit(&s, x, y, comp, req_comp); +} + +#ifndef STBI_NO_GIF +STBIDEF stbi_uc * stbi_load_gif_from_memory(stbi_uc const * buffer, int len, int ** delays, int * x, int * y, int * z, + int * comp, int req_comp) { + unsigned char * result; + stbi__context s; + stbi__start_mem(&s, buffer, len); + + result = (unsigned char *)stbi__load_gif_main(&s, delays, x, y, z, comp, req_comp); + if (stbi__vertically_flip_on_load) { + stbi__vertical_flip_slices(result, *x, *y, *z, *comp); + } + + return result; +} +#endif + +#ifndef STBI_NO_LINEAR +static float * stbi__loadf_main(stbi__context * s, int * x, int * y, int * comp, int req_comp) { + unsigned char * data; +#ifndef STBI_NO_HDR + if (stbi__hdr_test(s)) { + stbi__result_info ri; + float * hdr_data = stbi__hdr_load(s, x, y, comp, req_comp, &ri); + if (hdr_data) + stbi__float_postprocess(hdr_data, x, y, comp, req_comp); + return hdr_data; + } +#endif + data = stbi__load_and_postprocess_8bit(s, x, y, comp, req_comp); + if (data) + return stbi__ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp); + return stbi__errpf("unknown image type", "Image not of any known type, or corrupt"); +} + +STBIDEF float * stbi_loadf_from_memory(stbi_uc const * buffer, int len, int * x, int * y, int * comp, int req_comp) { + stbi__context s; + stbi__start_mem(&s, buffer, len); + return stbi__loadf_main(&s, x, y, comp, req_comp); +} + +STBIDEF float * stbi_loadf_from_callbacks(stbi_io_callbacks const * clbk, void * user, int * x, int * y, int * comp, + int req_comp) { + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *)clbk, user); + return stbi__loadf_main(&s, x, y, comp, req_comp); +} + +#ifndef STBI_NO_STDIO +STBIDEF float * stbi_loadf(char const * filename, int * x, int * y, int * comp, int req_comp) { + float * result; + FILE * f = stbi__fopen(filename, "rb"); + if (!f) + return stbi__errpf("can't fopen", "Unable to open file"); + result = stbi_loadf_from_file(f, x, y, comp, req_comp); + fclose(f); + return result; +} + +STBIDEF float * stbi_loadf_from_file(FILE * f, int * x, int * y, int * comp, int req_comp) { + stbi__context s; + stbi__start_file(&s, f); + return stbi__loadf_main(&s, x, y, comp, req_comp); +} +#endif // !STBI_NO_STDIO + +#endif // !STBI_NO_LINEAR + +// these is-hdr-or-not is defined independent of whether STBI_NO_LINEAR is +// defined, for API simplicity; if STBI_NO_LINEAR is defined, it always +// reports false! + +STBIDEF int stbi_is_hdr_from_memory(stbi_uc const * buffer, int len) { +#ifndef STBI_NO_HDR + stbi__context s; + stbi__start_mem(&s, buffer, len); + return stbi__hdr_test(&s); +#else + STBI_NOTUSED(buffer); + STBI_NOTUSED(len); + return 0; +#endif +} + +#ifndef STBI_NO_STDIO +STBIDEF int stbi_is_hdr(char const * filename) { + FILE * f = stbi__fopen(filename, "rb"); + int result = 0; + if (f) { + result = stbi_is_hdr_from_file(f); + fclose(f); + } + return result; +} + +STBIDEF int stbi_is_hdr_from_file(FILE * f) { +#ifndef STBI_NO_HDR + long pos = ftell(f); + int res; + stbi__context s; + stbi__start_file(&s, f); + res = stbi__hdr_test(&s); + fseek(f, pos, SEEK_SET); + return res; +#else + STBI_NOTUSED(f); + return 0; +#endif +} +#endif // !STBI_NO_STDIO + +STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const * clbk, void * user) { +#ifndef STBI_NO_HDR + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *)clbk, user); + return stbi__hdr_test(&s); +#else + STBI_NOTUSED(clbk); + STBI_NOTUSED(user); + return 0; +#endif +} + +#ifndef STBI_NO_LINEAR +static float stbi__l2h_gamma = 2.2f, stbi__l2h_scale = 1.0f; + +STBIDEF void stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; } +STBIDEF void stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; } +#endif + +static float stbi__h2l_gamma_i = 1.0f / 2.2f, stbi__h2l_scale_i = 1.0f; + +STBIDEF void stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1 / gamma; } +STBIDEF void stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1 / scale; } + +////////////////////////////////////////////////////////////////////////////// +// +// Common code used by all image loaders +// + +enum { STBI__SCAN_load = 0, STBI__SCAN_type, STBI__SCAN_header }; + +static void stbi__refill_buffer(stbi__context * s) { + int n = (s->io.read)(s->io_user_data, (char *)s->buffer_start, s->buflen); + s->callback_already_read += (int)(s->img_buffer - s->img_buffer_original); + if (n == 0) { + // at end of file, treat same as if from memory, but need to handle case + // where s->img_buffer isn't pointing to safe memory, e.g. 0-byte file + s->read_from_callbacks = 0; + s->img_buffer = s->buffer_start; + s->img_buffer_end = s->buffer_start + 1; + *s->img_buffer = 0; + } else { + s->img_buffer = s->buffer_start; + s->img_buffer_end = s->buffer_start + n; + } +} + +stbi_inline static stbi_uc stbi__get8(stbi__context * s) { + if (s->img_buffer < s->img_buffer_end) + return *s->img_buffer++; + if (s->read_from_callbacks) { + stbi__refill_buffer(s); + return *s->img_buffer++; + } + return 0; +} + +#if defined(STBI_NO_JPEG) && defined(STBI_NO_HDR) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM) +// nothing +#else +stbi_inline static int stbi__at_eof(stbi__context * s) { + if (s->io.read) { + if (!(s->io.eof)(s->io_user_data)) + return 0; + // if feof() is true, check if buffer = end + // special case: we've only got the special 0 character at the end + if (s->read_from_callbacks == 0) + return 1; + } + + return s->img_buffer >= s->img_buffer_end; +} +#endif + +#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && \ + defined(STBI_NO_GIF) && defined(STBI_NO_PIC) +// nothing +#else +static void stbi__skip(stbi__context * s, int n) { + if (n == 0) + return; // already there! + if (n < 0) { + s->img_buffer = s->img_buffer_end; + return; + } + if (s->io.read) { + int blen = (int)(s->img_buffer_end - s->img_buffer); + if (blen < n) { + s->img_buffer = s->img_buffer_end; + (s->io.skip)(s->io_user_data, n - blen); + return; + } + } + s->img_buffer += n; +} +#endif + +#if defined(STBI_NO_PNG) && defined(STBI_NO_TGA) && defined(STBI_NO_HDR) && defined(STBI_NO_PNM) +// nothing +#else +static int stbi__getn(stbi__context * s, stbi_uc * buffer, int n) { + if (s->io.read) { + int blen = (int)(s->img_buffer_end - s->img_buffer); + if (blen < n) { + int res, count; + + memcpy(buffer, s->img_buffer, blen); + + count = (s->io.read)(s->io_user_data, (char *)buffer + blen, n - blen); + res = (count == (n - blen)); + s->img_buffer = s->img_buffer_end; + return res; + } + } + + if (s->img_buffer + n <= s->img_buffer_end) { + memcpy(buffer, s->img_buffer, n); + s->img_buffer += n; + return 1; + } else + return 0; +} +#endif + +#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_PSD) && defined(STBI_NO_PIC) +// nothing +#else +static int stbi__get16be(stbi__context * s) { + int z = stbi__get8(s); + return (z << 8) + stbi__get8(s); +} +#endif + +#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD) && defined(STBI_NO_PIC) +// nothing +#else +static stbi__uint32 stbi__get32be(stbi__context * s) { + stbi__uint32 z = stbi__get16be(s); + return (z << 16) + stbi__get16be(s); +} +#endif + +#if defined(STBI_NO_BMP) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) +// nothing +#else +static int stbi__get16le(stbi__context * s) { + int z = stbi__get8(s); + return z + (stbi__get8(s) << 8); +} +#endif + +#ifndef STBI_NO_BMP +static stbi__uint32 stbi__get32le(stbi__context * s) { + stbi__uint32 z = stbi__get16le(s); + z += (stbi__uint32)stbi__get16le(s) << 16; + return z; +} +#endif + +#define STBI__BYTECAST(x) ((stbi_uc)((x)&255)) // truncate int to byte without warnings + +#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && \ + defined(STBI_NO_GIF) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM) +// nothing +#else +////////////////////////////////////////////////////////////////////////////// +// +// generic converter from built-in img_n to req_comp +// individual types do this automatically as much as possible (e.g. jpeg +// does all cases internally since it needs to colorspace convert anyway, +// and it never has alpha, so very few cases ). png can automatically +// interleave an alpha=255 channel, but falls back to this for other cases +// +// assume data buffer is malloced, so malloc a new one and free that one +// only failure mode is malloc failing + +static stbi_uc stbi__compute_y(int r, int g, int b) { return (stbi_uc)(((r * 77) + (g * 150) + (29 * b)) >> 8); } +#endif + +#if defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) && \ + defined(STBI_NO_PIC) && defined(STBI_NO_PNM) +// nothing +#else +static unsigned char * stbi__convert_format(unsigned char * data, int img_n, int req_comp, unsigned int x, unsigned int y) { + int i, j; + unsigned char * good; + + if (req_comp == img_n) + return data; + STBI_ASSERT(req_comp >= 1 && req_comp <= 4); + + good = (unsigned char *)stbi__malloc_mad3(req_comp, x, y, 0); + if (good == NULL) { + STBI_FREE(data); + return stbi__errpuc("outofmem", "Out of memory"); + } + + for (j = 0; j < (int)y; ++j) { + unsigned char * src = data + j * x * img_n; + unsigned char * dest = good + j * x * req_comp; + +#define STBI__COMBO(a, b) ((a)*8 + (b)) +#define STBI__CASE(a, b) \ + case STBI__COMBO(a, b): \ + for (i = x - 1; i >= 0; --i, src += a, dest += b) + // convert source image with img_n components to one with req_comp components; + // avoid switch per pixel, so use switch per scanline and massive macros + switch (STBI__COMBO(img_n, req_comp)) { + STBI__CASE(1, 2) { + dest[0] = src[0]; + dest[1] = 255; + } + break; + STBI__CASE(1, 3) { dest[0] = dest[1] = dest[2] = src[0]; } + break; + STBI__CASE(1, 4) { + dest[0] = dest[1] = dest[2] = src[0]; + dest[3] = 255; + } + break; + STBI__CASE(2, 1) { dest[0] = src[0]; } + break; + STBI__CASE(2, 3) { dest[0] = dest[1] = dest[2] = src[0]; } + break; + STBI__CASE(2, 4) { + dest[0] = dest[1] = dest[2] = src[0]; + dest[3] = src[1]; + } + break; + STBI__CASE(3, 4) { + dest[0] = src[0]; + dest[1] = src[1]; + dest[2] = src[2]; + dest[3] = 255; + } + break; + STBI__CASE(3, 1) { dest[0] = stbi__compute_y(src[0], src[1], src[2]); } + break; + STBI__CASE(3, 2) { + dest[0] = stbi__compute_y(src[0], src[1], src[2]); + dest[1] = 255; + } + break; + STBI__CASE(4, 1) { dest[0] = stbi__compute_y(src[0], src[1], src[2]); } + break; + STBI__CASE(4, 2) { + dest[0] = stbi__compute_y(src[0], src[1], src[2]); + dest[1] = src[3]; + } + break; + STBI__CASE(4, 3) { + dest[0] = src[0]; + dest[1] = src[1]; + dest[2] = src[2]; + } + break; + default: + STBI_ASSERT(0); + STBI_FREE(data); + STBI_FREE(good); + return stbi__errpuc("unsupported", "Unsupported format conversion"); + } +#undef STBI__CASE + } + + STBI_FREE(data); + return good; +} +#endif + +#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD) +// nothing +#else +static stbi__uint16 stbi__compute_y_16(int r, int g, int b) { return (stbi__uint16)(((r * 77) + (g * 150) + (29 * b)) >> 8); } +#endif + +#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD) +// nothing +#else +static stbi__uint16 * stbi__convert_format16(stbi__uint16 * data, int img_n, int req_comp, unsigned int x, unsigned int y) { + int i, j; + stbi__uint16 * good; + + if (req_comp == img_n) + return data; + STBI_ASSERT(req_comp >= 1 && req_comp <= 4); + + good = (stbi__uint16 *)stbi__malloc(req_comp * x * y * 2); + if (good == NULL) { + STBI_FREE(data); + return (stbi__uint16 *)stbi__errpuc("outofmem", "Out of memory"); + } + + for (j = 0; j < (int)y; ++j) { + stbi__uint16 * src = data + j * x * img_n; + stbi__uint16 * dest = good + j * x * req_comp; + +#define STBI__COMBO(a, b) ((a)*8 + (b)) +#define STBI__CASE(a, b) \ + case STBI__COMBO(a, b): \ + for (i = x - 1; i >= 0; --i, src += a, dest += b) + // convert source image with img_n components to one with req_comp components; + // avoid switch per pixel, so use switch per scanline and massive macros + switch (STBI__COMBO(img_n, req_comp)) { + STBI__CASE(1, 2) { + dest[0] = src[0]; + dest[1] = 0xffff; + } + break; + STBI__CASE(1, 3) { dest[0] = dest[1] = dest[2] = src[0]; } + break; + STBI__CASE(1, 4) { + dest[0] = dest[1] = dest[2] = src[0]; + dest[3] = 0xffff; + } + break; + STBI__CASE(2, 1) { dest[0] = src[0]; } + break; + STBI__CASE(2, 3) { dest[0] = dest[1] = dest[2] = src[0]; } + break; + STBI__CASE(2, 4) { + dest[0] = dest[1] = dest[2] = src[0]; + dest[3] = src[1]; + } + break; + STBI__CASE(3, 4) { + dest[0] = src[0]; + dest[1] = src[1]; + dest[2] = src[2]; + dest[3] = 0xffff; + } + break; + STBI__CASE(3, 1) { dest[0] = stbi__compute_y_16(src[0], src[1], src[2]); } + break; + STBI__CASE(3, 2) { + dest[0] = stbi__compute_y_16(src[0], src[1], src[2]); + dest[1] = 0xffff; + } + break; + STBI__CASE(4, 1) { dest[0] = stbi__compute_y_16(src[0], src[1], src[2]); } + break; + STBI__CASE(4, 2) { + dest[0] = stbi__compute_y_16(src[0], src[1], src[2]); + dest[1] = src[3]; + } + break; + STBI__CASE(4, 3) { + dest[0] = src[0]; + dest[1] = src[1]; + dest[2] = src[2]; + } + break; + default: + STBI_ASSERT(0); + STBI_FREE(data); + STBI_FREE(good); + return (stbi__uint16 *)stbi__errpuc("unsupported", "Unsupported format conversion"); + } +#undef STBI__CASE + } + + STBI_FREE(data); + return good; +} +#endif + +#ifndef STBI_NO_LINEAR +static float * stbi__ldr_to_hdr(stbi_uc * data, int x, int y, int comp) { + int i, k, n; + float * output; + if (!data) + return NULL; + output = (float *)stbi__malloc_mad4(x, y, comp, sizeof(float), 0); + if (output == NULL) { + STBI_FREE(data); + return stbi__errpf("outofmem", "Out of memory"); + } + // compute number of non-alpha components + if (comp & 1) + n = comp; + else + n = comp - 1; + for (i = 0; i < x * y; ++i) { + for (k = 0; k < n; ++k) { + output[i * comp + k] = (float)(pow(data[i * comp + k] / 255.0f, stbi__l2h_gamma) * stbi__l2h_scale); + } + } + if (n < comp) { + for (i = 0; i < x * y; ++i) { + output[i * comp + n] = data[i * comp + n] / 255.0f; + } + } + STBI_FREE(data); + return output; +} +#endif + +#ifndef STBI_NO_HDR +#define stbi__float2int(x) ((int)(x)) +static stbi_uc * stbi__hdr_to_ldr(float * data, int x, int y, int comp) { + int i, k, n; + stbi_uc * output; + if (!data) + return NULL; + output = (stbi_uc *)stbi__malloc_mad3(x, y, comp, 0); + if (output == NULL) { + STBI_FREE(data); + return stbi__errpuc("outofmem", "Out of memory"); + } + // compute number of non-alpha components + if (comp & 1) + n = comp; + else + n = comp - 1; + for (i = 0; i < x * y; ++i) { + for (k = 0; k < n; ++k) { + float z = (float)pow(data[i * comp + k] * stbi__h2l_scale_i, stbi__h2l_gamma_i) * 255 + 0.5f; + if (z < 0) + z = 0; + if (z > 255) + z = 255; + output[i * comp + k] = (stbi_uc)stbi__float2int(z); + } + if (k < comp) { + float z = data[i * comp + k] * 255 + 0.5f; + if (z < 0) + z = 0; + if (z > 255) + z = 255; + output[i * comp + k] = (stbi_uc)stbi__float2int(z); + } + } + STBI_FREE(data); + return output; +} +#endif + +////////////////////////////////////////////////////////////////////////////// +// +// "baseline" JPEG/JFIF decoder +// +// simple implementation +// - doesn't support delayed output of y-dimension +// - simple interface (only one output format: 8-bit interleaved RGB) +// - doesn't try to recover corrupt jpegs +// - doesn't allow partial loading, loading multiple at once +// - still fast on x86 (copying globals into locals doesn't help x86) +// - allocates lots of intermediate memory (full size of all components) +// - non-interleaved case requires this anyway +// - allows good upsampling (see next) +// high-quality +// - upsampled channels are bilinearly interpolated, even across blocks +// - quality integer IDCT derived from IJG's 'slow' +// performance +// - fast huffman; reasonable integer IDCT +// - some SIMD kernels for common paths on targets with SSE2/NEON +// - uses a lot of intermediate memory, could cache poorly + +#ifndef STBI_NO_JPEG + +// huffman decoding acceleration +#define FAST_BITS 9 // larger handles more cases; smaller stomps less cache + +typedef struct { + stbi_uc fast[1 << FAST_BITS]; + // weirdly, repacking this into AoS is a 10% speed loss, instead of a win + stbi__uint16 code[256]; + stbi_uc values[256]; + stbi_uc size[257]; + unsigned int maxcode[18]; + int delta[17]; // old 'firstsymbol' - old 'firstcode' +} stbi__huffman; + +typedef struct { + stbi__context * s; + stbi__huffman huff_dc[4]; + stbi__huffman huff_ac[4]; + stbi__uint16 dequant[4][64]; + stbi__int16 fast_ac[4][1 << FAST_BITS]; + + // sizes for components, interleaved MCUs + int img_h_max, img_v_max; + int img_mcu_x, img_mcu_y; + int img_mcu_w, img_mcu_h; + + // definition of jpeg image component + struct { + int id; + int h, v; + int tq; + int hd, ha; + int dc_pred; + + int x, y, w2, h2; + stbi_uc * data; + void *raw_data, *raw_coeff; + stbi_uc * linebuf; + short * coeff; // progressive only + int coeff_w, coeff_h; // number of 8x8 coefficient blocks + } img_comp[4]; + + stbi__uint32 code_buffer; // jpeg entropy-coded buffer + int code_bits; // number of valid bits + unsigned char marker; // marker seen while filling entropy buffer + int nomore; // flag if we saw a marker so must stop + + int progressive; + int spec_start; + int spec_end; + int succ_high; + int succ_low; + int eob_run; + int jfif; + int app14_color_transform; // Adobe APP14 tag + int rgb; + + int scan_n, order[4]; + int restart_interval, todo; + + // kernels + void (*idct_block_kernel)(stbi_uc * out, int out_stride, short data[64]); + void (*YCbCr_to_RGB_kernel)(stbi_uc * out, const stbi_uc * y, const stbi_uc * pcb, const stbi_uc * pcr, int count, + int step); + stbi_uc * (*resample_row_hv_2_kernel)(stbi_uc * out, stbi_uc * in_near, stbi_uc * in_far, int w, int hs); +} stbi__jpeg; + +static int stbi__build_huffman(stbi__huffman * h, int * count) { + int i, j, k = 0; + unsigned int code; + // build size list for each symbol (from JPEG spec) + for (i = 0; i < 16; ++i) { + for (j = 0; j < count[i]; ++j) { + h->size[k++] = (stbi_uc)(i + 1); + if (k >= 257) + return stbi__err("bad size list", "Corrupt JPEG"); + } + } + h->size[k] = 0; + + // compute actual symbols (from jpeg spec) + code = 0; + k = 0; + for (j = 1; j <= 16; ++j) { + // compute delta to add to code to compute symbol id + h->delta[j] = k - code; + if (h->size[k] == j) { + while (h->size[k] == j) + h->code[k++] = (stbi__uint16)(code++); + if (code - 1 >= (1u << j)) + return stbi__err("bad code lengths", "Corrupt JPEG"); + } + // compute largest code + 1 for this size, preshifted as needed later + h->maxcode[j] = code << (16 - j); + code <<= 1; + } + h->maxcode[j] = 0xffffffff; + + // build non-spec acceleration table; 255 is flag for not-accelerated + memset(h->fast, 255, 1 << FAST_BITS); + for (i = 0; i < k; ++i) { + int s = h->size[i]; + if (s <= FAST_BITS) { + int c = h->code[i] << (FAST_BITS - s); + int m = 1 << (FAST_BITS - s); + for (j = 0; j < m; ++j) { + h->fast[c + j] = (stbi_uc)i; + } + } + } + return 1; +} + +// build a table that decodes both magnitude and value of small ACs in +// one go. +static void stbi__build_fast_ac(stbi__int16 * fast_ac, stbi__huffman * h) { + int i; + for (i = 0; i < (1 << FAST_BITS); ++i) { + stbi_uc fast = h->fast[i]; + fast_ac[i] = 0; + if (fast < 255) { + int rs = h->values[fast]; + int run = (rs >> 4) & 15; + int magbits = rs & 15; + int len = h->size[fast]; + + if (magbits && len + magbits <= FAST_BITS) { + // magnitude code followed by receive_extend code + int k = ((i << len) & ((1 << FAST_BITS) - 1)) >> (FAST_BITS - magbits); + int m = 1 << (magbits - 1); + if (k < m) + k += (~0U << magbits) + 1; + // if the result is small enough, we can fit it in fast_ac table + if (k >= -128 && k <= 127) + fast_ac[i] = (stbi__int16)((k * 256) + (run * 16) + (len + magbits)); + } + } + } +} + +static void stbi__grow_buffer_unsafe(stbi__jpeg * j) { + do { + unsigned int b = j->nomore ? 0 : stbi__get8(j->s); + if (b == 0xff) { + int c = stbi__get8(j->s); + while (c == 0xff) + c = stbi__get8(j->s); // consume fill bytes + if (c != 0) { + j->marker = (unsigned char)c; + j->nomore = 1; + return; + } + } + j->code_buffer |= b << (24 - j->code_bits); + j->code_bits += 8; + } while (j->code_bits <= 24); +} + +// (1 << n) - 1 +static const stbi__uint32 stbi__bmask[17] = {0, 1, 3, 7, 15, 31, 63, 127, 255, + 511, 1023, 2047, 4095, 8191, 16383, 32767, 65535}; + +// decode a jpeg huffman value from the bitstream +stbi_inline static int stbi__jpeg_huff_decode(stbi__jpeg * j, stbi__huffman * h) { + unsigned int temp; + int c, k; + + if (j->code_bits < 16) + stbi__grow_buffer_unsafe(j); + + // look at the top FAST_BITS and determine what symbol ID it is, + // if the code is <= FAST_BITS + c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS) - 1); + k = h->fast[c]; + if (k < 255) { + int s = h->size[k]; + if (s > j->code_bits) + return -1; + j->code_buffer <<= s; + j->code_bits -= s; + return h->values[k]; + } + + // naive test is to shift the code_buffer down so k bits are + // valid, then test against maxcode. To speed this up, we've + // preshifted maxcode left so that it has (16-k) 0s at the + // end; in other words, regardless of the number of bits, it + // wants to be compared against something shifted to have 16; + // that way we don't need to shift inside the loop. + temp = j->code_buffer >> 16; + for (k = FAST_BITS + 1;; ++k) + if (temp < h->maxcode[k]) + break; + if (k == 17) { + // error! code not found + j->code_bits -= 16; + return -1; + } + + if (k > j->code_bits) + return -1; + + // convert the huffman code to the symbol id + c = ((j->code_buffer >> (32 - k)) & stbi__bmask[k]) + h->delta[k]; + if (c < 0 || c >= 256) // symbol id out of bounds! + return -1; + STBI_ASSERT((((j->code_buffer) >> (32 - h->size[c])) & stbi__bmask[h->size[c]]) == h->code[c]); + + // convert the id to a symbol + j->code_bits -= k; + j->code_buffer <<= k; + return h->values[c]; +} + +// bias[n] = (-1<code_bits < n) + stbi__grow_buffer_unsafe(j); + if (j->code_bits < n) + return 0; // ran out of bits from stream, return 0s intead of continuing + + sgn = j->code_buffer >> 31; // sign bit always in MSB; 0 if MSB clear (positive), 1 if MSB set (negative) + k = stbi_lrot(j->code_buffer, n); + j->code_buffer = k & ~stbi__bmask[n]; + k &= stbi__bmask[n]; + j->code_bits -= n; + return k + (stbi__jbias[n] & (sgn - 1)); +} + +// get some unsigned bits +stbi_inline static int stbi__jpeg_get_bits(stbi__jpeg * j, int n) { + unsigned int k; + if (j->code_bits < n) + stbi__grow_buffer_unsafe(j); + if (j->code_bits < n) + return 0; // ran out of bits from stream, return 0s intead of continuing + k = stbi_lrot(j->code_buffer, n); + j->code_buffer = k & ~stbi__bmask[n]; + k &= stbi__bmask[n]; + j->code_bits -= n; + return k; +} + +stbi_inline static int stbi__jpeg_get_bit(stbi__jpeg * j) { + unsigned int k; + if (j->code_bits < 1) + stbi__grow_buffer_unsafe(j); + if (j->code_bits < 1) + return 0; // ran out of bits from stream, return 0s intead of continuing + k = j->code_buffer; + j->code_buffer <<= 1; + --j->code_bits; + return k & 0x80000000; +} + +// given a value that's at position X in the zigzag stream, +// where does it appear in the 8x8 matrix coded as row-major? +static const stbi_uc stbi__jpeg_dezigzag[64 + 15] = { + 0, 1, 8, 16, 9, 2, 3, 10, 17, 24, 32, 25, 18, 11, 4, 5, 12, 19, 26, 33, 40, 48, 41, 34, 27, 20, 13, 6, 7, 14, 21, 28, 35, + 42, 49, 56, 57, 50, 43, 36, 29, 22, 15, 23, 30, 37, 44, 51, 58, 59, 52, 45, 38, 31, 39, 46, 53, 60, 61, 54, 47, 55, 62, 63, + // let corrupt input sample past end + 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63}; + +// decode one 64-entry block-- +static int stbi__jpeg_decode_block(stbi__jpeg * j, short data[64], stbi__huffman * hdc, stbi__huffman * hac, stbi__int16 * fac, + int b, stbi__uint16 * dequant) { + int diff, dc, k; + int t; + + if (j->code_bits < 16) + stbi__grow_buffer_unsafe(j); + t = stbi__jpeg_huff_decode(j, hdc); + if (t < 0 || t > 15) + return stbi__err("bad huffman code", "Corrupt JPEG"); + + // 0 all the ac values now so we can do it 32-bits at a time + memset(data, 0, 64 * sizeof(data[0])); + + diff = t ? stbi__extend_receive(j, t) : 0; + if (!stbi__addints_valid(j->img_comp[b].dc_pred, diff)) + return stbi__err("bad delta", "Corrupt JPEG"); + dc = j->img_comp[b].dc_pred + diff; + j->img_comp[b].dc_pred = dc; + if (!stbi__mul2shorts_valid(dc, dequant[0])) + return stbi__err("can't merge dc and ac", "Corrupt JPEG"); + data[0] = (short)(dc * dequant[0]); + + // decode AC components, see JPEG spec + k = 1; + do { + unsigned int zig; + int c, r, s; + if (j->code_bits < 16) + stbi__grow_buffer_unsafe(j); + c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS) - 1); + r = fac[c]; + if (r) { // fast-AC path + k += (r >> 4) & 15; // run + s = r & 15; // combined length + if (s > j->code_bits) + return stbi__err("bad huffman code", "Combined length longer than code bits available"); + j->code_buffer <<= s; + j->code_bits -= s; + // decode into unzigzag'd location + zig = stbi__jpeg_dezigzag[k++]; + data[zig] = (short)((r >> 8) * dequant[zig]); + } else { + int rs = stbi__jpeg_huff_decode(j, hac); + if (rs < 0) + return stbi__err("bad huffman code", "Corrupt JPEG"); + s = rs & 15; + r = rs >> 4; + if (s == 0) { + if (rs != 0xf0) + break; // end block + k += 16; + } else { + k += r; + // decode into unzigzag'd location + zig = stbi__jpeg_dezigzag[k++]; + data[zig] = (short)(stbi__extend_receive(j, s) * dequant[zig]); + } + } + } while (k < 64); + return 1; +} + +static int stbi__jpeg_decode_block_prog_dc(stbi__jpeg * j, short data[64], stbi__huffman * hdc, int b) { + int diff, dc; + int t; + if (j->spec_end != 0) + return stbi__err("can't merge dc and ac", "Corrupt JPEG"); + + if (j->code_bits < 16) + stbi__grow_buffer_unsafe(j); + + if (j->succ_high == 0) { + // first scan for DC coefficient, must be first + memset(data, 0, 64 * sizeof(data[0])); // 0 all the ac values now + t = stbi__jpeg_huff_decode(j, hdc); + if (t < 0 || t > 15) + return stbi__err("can't merge dc and ac", "Corrupt JPEG"); + diff = t ? stbi__extend_receive(j, t) : 0; + + if (!stbi__addints_valid(j->img_comp[b].dc_pred, diff)) + return stbi__err("bad delta", "Corrupt JPEG"); + dc = j->img_comp[b].dc_pred + diff; + j->img_comp[b].dc_pred = dc; + if (!stbi__mul2shorts_valid(dc, 1 << j->succ_low)) + return stbi__err("can't merge dc and ac", "Corrupt JPEG"); + data[0] = (short)(dc * (1 << j->succ_low)); + } else { + // refinement scan for DC coefficient + if (stbi__jpeg_get_bit(j)) + data[0] += (short)(1 << j->succ_low); + } + return 1; +} + +// @OPTIMIZE: store non-zigzagged during the decode passes, +// and only de-zigzag when dequantizing +static int stbi__jpeg_decode_block_prog_ac(stbi__jpeg * j, short data[64], stbi__huffman * hac, stbi__int16 * fac) { + int k; + if (j->spec_start == 0) + return stbi__err("can't merge dc and ac", "Corrupt JPEG"); + + if (j->succ_high == 0) { + int shift = j->succ_low; + + if (j->eob_run) { + --j->eob_run; + return 1; + } + + k = j->spec_start; + do { + unsigned int zig; + int c, r, s; + if (j->code_bits < 16) + stbi__grow_buffer_unsafe(j); + c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS) - 1); + r = fac[c]; + if (r) { // fast-AC path + k += (r >> 4) & 15; // run + s = r & 15; // combined length + if (s > j->code_bits) + return stbi__err("bad huffman code", "Combined length longer than code bits available"); + j->code_buffer <<= s; + j->code_bits -= s; + zig = stbi__jpeg_dezigzag[k++]; + data[zig] = (short)((r >> 8) * (1 << shift)); + } else { + int rs = stbi__jpeg_huff_decode(j, hac); + if (rs < 0) + return stbi__err("bad huffman code", "Corrupt JPEG"); + s = rs & 15; + r = rs >> 4; + if (s == 0) { + if (r < 15) { + j->eob_run = (1 << r); + if (r) + j->eob_run += stbi__jpeg_get_bits(j, r); + --j->eob_run; + break; + } + k += 16; + } else { + k += r; + zig = stbi__jpeg_dezigzag[k++]; + data[zig] = (short)(stbi__extend_receive(j, s) * (1 << shift)); + } + } + } while (k <= j->spec_end); + } else { + // refinement scan for these AC coefficients + + short bit = (short)(1 << j->succ_low); + + if (j->eob_run) { + --j->eob_run; + for (k = j->spec_start; k <= j->spec_end; ++k) { + short * p = &data[stbi__jpeg_dezigzag[k]]; + if (*p != 0) + if (stbi__jpeg_get_bit(j)) + if ((*p & bit) == 0) { + if (*p > 0) + *p += bit; + else + *p -= bit; + } + } + } else { + k = j->spec_start; + do { + int r, s; + int rs = stbi__jpeg_huff_decode( + j, hac); // @OPTIMIZE see if we can use the fast path here, advance-by-r is so slow, eh + if (rs < 0) + return stbi__err("bad huffman code", "Corrupt JPEG"); + s = rs & 15; + r = rs >> 4; + if (s == 0) { + if (r < 15) { + j->eob_run = (1 << r) - 1; + if (r) + j->eob_run += stbi__jpeg_get_bits(j, r); + r = 64; // force end of block + } else { + // r=15 s=0 should write 16 0s, so we just do + // a run of 15 0s and then write s (which is 0), + // so we don't have to do anything special here + } + } else { + if (s != 1) + return stbi__err("bad huffman code", "Corrupt JPEG"); + // sign bit + if (stbi__jpeg_get_bit(j)) + s = bit; + else + s = -bit; + } + + // advance by r + while (k <= j->spec_end) { + short * p = &data[stbi__jpeg_dezigzag[k++]]; + if (*p != 0) { + if (stbi__jpeg_get_bit(j)) + if ((*p & bit) == 0) { + if (*p > 0) + *p += bit; + else + *p -= bit; + } + } else { + if (r == 0) { + *p = (short)s; + break; + } + --r; + } + } + } while (k <= j->spec_end); + } + } + return 1; +} + +// take a -128..127 value and stbi__clamp it and convert to 0..255 +stbi_inline static stbi_uc stbi__clamp(int x) { + // trick to use a single test to catch both cases + if ((unsigned int)x > 255) { + if (x < 0) + return 0; + if (x > 255) + return 255; + } + return (stbi_uc)x; +} + +#define stbi__f2f(x) ((int)(((x)*4096 + 0.5))) +#define stbi__fsh(x) ((x)*4096) + +// derived from jidctint -- DCT_ISLOW +#define STBI__IDCT_1D(s0, s1, s2, s3, s4, s5, s6, s7) \ + int t0, t1, t2, t3, p1, p2, p3, p4, p5, x0, x1, x2, x3; \ + p2 = s2; \ + p3 = s6; \ + p1 = (p2 + p3) * stbi__f2f(0.5411961f); \ + t2 = p1 + p3 * stbi__f2f(-1.847759065f); \ + t3 = p1 + p2 * stbi__f2f(0.765366865f); \ + p2 = s0; \ + p3 = s4; \ + t0 = stbi__fsh(p2 + p3); \ + t1 = stbi__fsh(p2 - p3); \ + x0 = t0 + t3; \ + x3 = t0 - t3; \ + x1 = t1 + t2; \ + x2 = t1 - t2; \ + t0 = s7; \ + t1 = s5; \ + t2 = s3; \ + t3 = s1; \ + p3 = t0 + t2; \ + p4 = t1 + t3; \ + p1 = t0 + t3; \ + p2 = t1 + t2; \ + p5 = (p3 + p4) * stbi__f2f(1.175875602f); \ + t0 = t0 * stbi__f2f(0.298631336f); \ + t1 = t1 * stbi__f2f(2.053119869f); \ + t2 = t2 * stbi__f2f(3.072711026f); \ + t3 = t3 * stbi__f2f(1.501321110f); \ + p1 = p5 + p1 * stbi__f2f(-0.899976223f); \ + p2 = p5 + p2 * stbi__f2f(-2.562915447f); \ + p3 = p3 * stbi__f2f(-1.961570560f); \ + p4 = p4 * stbi__f2f(-0.390180644f); \ + t3 += p1 + p4; \ + t2 += p2 + p3; \ + t1 += p2 + p4; \ + t0 += p1 + p3; + +static void stbi__idct_block(stbi_uc * out, int out_stride, short data[64]) { + int i, val[64], *v = val; + stbi_uc * o; + short * d = data; + + // columns + for (i = 0; i < 8; ++i, ++d, ++v) { + // if all zeroes, shortcut -- this avoids dequantizing 0s and IDCTing + if (d[8] == 0 && d[16] == 0 && d[24] == 0 && d[32] == 0 && d[40] == 0 && d[48] == 0 && d[56] == 0) { + // no shortcut 0 seconds + // (1|2|3|4|5|6|7)==0 0 seconds + // all separate -0.047 seconds + // 1 && 2|3 && 4|5 && 6|7: -0.047 seconds + int dcterm = d[0] * 4; + v[0] = v[8] = v[16] = v[24] = v[32] = v[40] = v[48] = v[56] = dcterm; + } else { + STBI__IDCT_1D(d[0], d[8], d[16], d[24], d[32], d[40], d[48], d[56]) + // constants scaled things up by 1<<12; let's bring them back + // down, but keep 2 extra bits of precision + x0 += 512; + x1 += 512; + x2 += 512; + x3 += 512; + v[0] = (x0 + t3) >> 10; + v[56] = (x0 - t3) >> 10; + v[8] = (x1 + t2) >> 10; + v[48] = (x1 - t2) >> 10; + v[16] = (x2 + t1) >> 10; + v[40] = (x2 - t1) >> 10; + v[24] = (x3 + t0) >> 10; + v[32] = (x3 - t0) >> 10; + } + } + + for (i = 0, v = val, o = out; i < 8; ++i, v += 8, o += out_stride) { + // no fast case since the first 1D IDCT spread components out + STBI__IDCT_1D(v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7]) + // constants scaled things up by 1<<12, plus we had 1<<2 from first + // loop, plus horizontal and vertical each scale by sqrt(8) so together + // we've got an extra 1<<3, so 1<<17 total we need to remove. + // so we want to round that, which means adding 0.5 * 1<<17, + // aka 65536. Also, we'll end up with -128 to 127 that we want + // to encode as 0..255 by adding 128, so we'll add that before the shift + x0 += 65536 + (128 << 17); + x1 += 65536 + (128 << 17); + x2 += 65536 + (128 << 17); + x3 += 65536 + (128 << 17); + // tried computing the shifts into temps, or'ing the temps to see + // if any were out of range, but that was slower + o[0] = stbi__clamp((x0 + t3) >> 17); + o[7] = stbi__clamp((x0 - t3) >> 17); + o[1] = stbi__clamp((x1 + t2) >> 17); + o[6] = stbi__clamp((x1 - t2) >> 17); + o[2] = stbi__clamp((x2 + t1) >> 17); + o[5] = stbi__clamp((x2 - t1) >> 17); + o[3] = stbi__clamp((x3 + t0) >> 17); + o[4] = stbi__clamp((x3 - t0) >> 17); + } +} + +#ifdef STBI_SSE2 +// sse2 integer IDCT. not the fastest possible implementation but it +// produces bit-identical results to the generic C version so it's +// fully "transparent". +static void stbi__idct_simd(stbi_uc * out, int out_stride, short data[64]) { + // This is constructed to match our regular (generic) integer IDCT exactly. + __m128i row0, row1, row2, row3, row4, row5, row6, row7; + __m128i tmp; + +// dot product constant: even elems=x, odd elems=y +#define dct_const(x, y) _mm_setr_epi16((x), (y), (x), (y), (x), (y), (x), (y)) + +// out(0) = c0[even]*x + c0[odd]*y (c0, x, y 16-bit, out 32-bit) +// out(1) = c1[even]*x + c1[odd]*y +#define dct_rot(out0, out1, x, y, c0, c1) \ + __m128i c0##lo = _mm_unpacklo_epi16((x), (y)); \ + __m128i c0##hi = _mm_unpackhi_epi16((x), (y)); \ + __m128i out0##_l = _mm_madd_epi16(c0##lo, c0); \ + __m128i out0##_h = _mm_madd_epi16(c0##hi, c0); \ + __m128i out1##_l = _mm_madd_epi16(c0##lo, c1); \ + __m128i out1##_h = _mm_madd_epi16(c0##hi, c1) + +// out = in << 12 (in 16-bit, out 32-bit) +#define dct_widen(out, in) \ + __m128i out##_l = _mm_srai_epi32(_mm_unpacklo_epi16(_mm_setzero_si128(), (in)), 4); \ + __m128i out##_h = _mm_srai_epi32(_mm_unpackhi_epi16(_mm_setzero_si128(), (in)), 4) + +// wide add +#define dct_wadd(out, a, b) \ + __m128i out##_l = _mm_add_epi32(a##_l, b##_l); \ + __m128i out##_h = _mm_add_epi32(a##_h, b##_h) + +// wide sub +#define dct_wsub(out, a, b) \ + __m128i out##_l = _mm_sub_epi32(a##_l, b##_l); \ + __m128i out##_h = _mm_sub_epi32(a##_h, b##_h) + +// butterfly a/b, add bias, then shift by "s" and pack +#define dct_bfly32o(out0, out1, a, b, bias, s) \ + { \ + __m128i abiased_l = _mm_add_epi32(a##_l, bias); \ + __m128i abiased_h = _mm_add_epi32(a##_h, bias); \ + dct_wadd(sum, abiased, b); \ + dct_wsub(dif, abiased, b); \ + out0 = _mm_packs_epi32(_mm_srai_epi32(sum_l, s), _mm_srai_epi32(sum_h, s)); \ + out1 = _mm_packs_epi32(_mm_srai_epi32(dif_l, s), _mm_srai_epi32(dif_h, s)); \ + } + +// 8-bit interleave step (for transposes) +#define dct_interleave8(a, b) \ + tmp = a; \ + a = _mm_unpacklo_epi8(a, b); \ + b = _mm_unpackhi_epi8(tmp, b) + +// 16-bit interleave step (for transposes) +#define dct_interleave16(a, b) \ + tmp = a; \ + a = _mm_unpacklo_epi16(a, b); \ + b = _mm_unpackhi_epi16(tmp, b) + +#define dct_pass(bias, shift) \ + { \ + /* even part */ \ + dct_rot(t2e, t3e, row2, row6, rot0_0, rot0_1); \ + __m128i sum04 = _mm_add_epi16(row0, row4); \ + __m128i dif04 = _mm_sub_epi16(row0, row4); \ + dct_widen(t0e, sum04); \ + dct_widen(t1e, dif04); \ + dct_wadd(x0, t0e, t3e); \ + dct_wsub(x3, t0e, t3e); \ + dct_wadd(x1, t1e, t2e); \ + dct_wsub(x2, t1e, t2e); \ + /* odd part */ \ + dct_rot(y0o, y2o, row7, row3, rot2_0, rot2_1); \ + dct_rot(y1o, y3o, row5, row1, rot3_0, rot3_1); \ + __m128i sum17 = _mm_add_epi16(row1, row7); \ + __m128i sum35 = _mm_add_epi16(row3, row5); \ + dct_rot(y4o, y5o, sum17, sum35, rot1_0, rot1_1); \ + dct_wadd(x4, y0o, y4o); \ + dct_wadd(x5, y1o, y5o); \ + dct_wadd(x6, y2o, y5o); \ + dct_wadd(x7, y3o, y4o); \ + dct_bfly32o(row0, row7, x0, x7, bias, shift); \ + dct_bfly32o(row1, row6, x1, x6, bias, shift); \ + dct_bfly32o(row2, row5, x2, x5, bias, shift); \ + dct_bfly32o(row3, row4, x3, x4, bias, shift); \ + } + + __m128i rot0_0 = dct_const(stbi__f2f(0.5411961f), stbi__f2f(0.5411961f) + stbi__f2f(-1.847759065f)); + __m128i rot0_1 = dct_const(stbi__f2f(0.5411961f) + stbi__f2f(0.765366865f), stbi__f2f(0.5411961f)); + __m128i rot1_0 = dct_const(stbi__f2f(1.175875602f) + stbi__f2f(-0.899976223f), stbi__f2f(1.175875602f)); + __m128i rot1_1 = dct_const(stbi__f2f(1.175875602f), stbi__f2f(1.175875602f) + stbi__f2f(-2.562915447f)); + __m128i rot2_0 = dct_const(stbi__f2f(-1.961570560f) + stbi__f2f(0.298631336f), stbi__f2f(-1.961570560f)); + __m128i rot2_1 = dct_const(stbi__f2f(-1.961570560f), stbi__f2f(-1.961570560f) + stbi__f2f(3.072711026f)); + __m128i rot3_0 = dct_const(stbi__f2f(-0.390180644f) + stbi__f2f(2.053119869f), stbi__f2f(-0.390180644f)); + __m128i rot3_1 = dct_const(stbi__f2f(-0.390180644f), stbi__f2f(-0.390180644f) + stbi__f2f(1.501321110f)); + + // rounding biases in column/row passes, see stbi__idct_block for explanation. + __m128i bias_0 = _mm_set1_epi32(512); + __m128i bias_1 = _mm_set1_epi32(65536 + (128 << 17)); + + // load + row0 = _mm_load_si128((const __m128i *)(data + 0 * 8)); + row1 = _mm_load_si128((const __m128i *)(data + 1 * 8)); + row2 = _mm_load_si128((const __m128i *)(data + 2 * 8)); + row3 = _mm_load_si128((const __m128i *)(data + 3 * 8)); + row4 = _mm_load_si128((const __m128i *)(data + 4 * 8)); + row5 = _mm_load_si128((const __m128i *)(data + 5 * 8)); + row6 = _mm_load_si128((const __m128i *)(data + 6 * 8)); + row7 = _mm_load_si128((const __m128i *)(data + 7 * 8)); + + // column pass + dct_pass(bias_0, 10); + + { + // 16bit 8x8 transpose pass 1 + dct_interleave16(row0, row4); + dct_interleave16(row1, row5); + dct_interleave16(row2, row6); + dct_interleave16(row3, row7); + + // transpose pass 2 + dct_interleave16(row0, row2); + dct_interleave16(row1, row3); + dct_interleave16(row4, row6); + dct_interleave16(row5, row7); + + // transpose pass 3 + dct_interleave16(row0, row1); + dct_interleave16(row2, row3); + dct_interleave16(row4, row5); + dct_interleave16(row6, row7); + } + + // row pass + dct_pass(bias_1, 17); + + { + // pack + __m128i p0 = _mm_packus_epi16(row0, row1); // a0a1a2a3...a7b0b1b2b3...b7 + __m128i p1 = _mm_packus_epi16(row2, row3); + __m128i p2 = _mm_packus_epi16(row4, row5); + __m128i p3 = _mm_packus_epi16(row6, row7); + + // 8bit 8x8 transpose pass 1 + dct_interleave8(p0, p2); // a0e0a1e1... + dct_interleave8(p1, p3); // c0g0c1g1... + + // transpose pass 2 + dct_interleave8(p0, p1); // a0c0e0g0... + dct_interleave8(p2, p3); // b0d0f0h0... + + // transpose pass 3 + dct_interleave8(p0, p2); // a0b0c0d0... + dct_interleave8(p1, p3); // a4b4c4d4... + + // store + _mm_storel_epi64((__m128i *)out, p0); + out += out_stride; + _mm_storel_epi64((__m128i *)out, _mm_shuffle_epi32(p0, 0x4e)); + out += out_stride; + _mm_storel_epi64((__m128i *)out, p2); + out += out_stride; + _mm_storel_epi64((__m128i *)out, _mm_shuffle_epi32(p2, 0x4e)); + out += out_stride; + _mm_storel_epi64((__m128i *)out, p1); + out += out_stride; + _mm_storel_epi64((__m128i *)out, _mm_shuffle_epi32(p1, 0x4e)); + out += out_stride; + _mm_storel_epi64((__m128i *)out, p3); + out += out_stride; + _mm_storel_epi64((__m128i *)out, _mm_shuffle_epi32(p3, 0x4e)); + } + +#undef dct_const +#undef dct_rot +#undef dct_widen +#undef dct_wadd +#undef dct_wsub +#undef dct_bfly32o +#undef dct_interleave8 +#undef dct_interleave16 +#undef dct_pass +} + +#endif // STBI_SSE2 + +#ifdef STBI_NEON + +// NEON integer IDCT. should produce bit-identical +// results to the generic C version. +static void stbi__idct_simd(stbi_uc * out, int out_stride, short data[64]) { + int16x8_t row0, row1, row2, row3, row4, row5, row6, row7; + + int16x4_t rot0_0 = vdup_n_s16(stbi__f2f(0.5411961f)); + int16x4_t rot0_1 = vdup_n_s16(stbi__f2f(-1.847759065f)); + int16x4_t rot0_2 = vdup_n_s16(stbi__f2f(0.765366865f)); + int16x4_t rot1_0 = vdup_n_s16(stbi__f2f(1.175875602f)); + int16x4_t rot1_1 = vdup_n_s16(stbi__f2f(-0.899976223f)); + int16x4_t rot1_2 = vdup_n_s16(stbi__f2f(-2.562915447f)); + int16x4_t rot2_0 = vdup_n_s16(stbi__f2f(-1.961570560f)); + int16x4_t rot2_1 = vdup_n_s16(stbi__f2f(-0.390180644f)); + int16x4_t rot3_0 = vdup_n_s16(stbi__f2f(0.298631336f)); + int16x4_t rot3_1 = vdup_n_s16(stbi__f2f(2.053119869f)); + int16x4_t rot3_2 = vdup_n_s16(stbi__f2f(3.072711026f)); + int16x4_t rot3_3 = vdup_n_s16(stbi__f2f(1.501321110f)); + +#define dct_long_mul(out, inq, coeff) \ + int32x4_t out##_l = vmull_s16(vget_low_s16(inq), coeff); \ + int32x4_t out##_h = vmull_s16(vget_high_s16(inq), coeff) + +#define dct_long_mac(out, acc, inq, coeff) \ + int32x4_t out##_l = vmlal_s16(acc##_l, vget_low_s16(inq), coeff); \ + int32x4_t out##_h = vmlal_s16(acc##_h, vget_high_s16(inq), coeff) + +#define dct_widen(out, inq) \ + int32x4_t out##_l = vshll_n_s16(vget_low_s16(inq), 12); \ + int32x4_t out##_h = vshll_n_s16(vget_high_s16(inq), 12) + +// wide add +#define dct_wadd(out, a, b) \ + int32x4_t out##_l = vaddq_s32(a##_l, b##_l); \ + int32x4_t out##_h = vaddq_s32(a##_h, b##_h) + +// wide sub +#define dct_wsub(out, a, b) \ + int32x4_t out##_l = vsubq_s32(a##_l, b##_l); \ + int32x4_t out##_h = vsubq_s32(a##_h, b##_h) + +// butterfly a/b, then shift using "shiftop" by "s" and pack +#define dct_bfly32o(out0, out1, a, b, shiftop, s) \ + { \ + dct_wadd(sum, a, b); \ + dct_wsub(dif, a, b); \ + out0 = vcombine_s16(shiftop(sum_l, s), shiftop(sum_h, s)); \ + out1 = vcombine_s16(shiftop(dif_l, s), shiftop(dif_h, s)); \ + } + +#define dct_pass(shiftop, shift) \ + { \ + /* even part */ \ + int16x8_t sum26 = vaddq_s16(row2, row6); \ + dct_long_mul(p1e, sum26, rot0_0); \ + dct_long_mac(t2e, p1e, row6, rot0_1); \ + dct_long_mac(t3e, p1e, row2, rot0_2); \ + int16x8_t sum04 = vaddq_s16(row0, row4); \ + int16x8_t dif04 = vsubq_s16(row0, row4); \ + dct_widen(t0e, sum04); \ + dct_widen(t1e, dif04); \ + dct_wadd(x0, t0e, t3e); \ + dct_wsub(x3, t0e, t3e); \ + dct_wadd(x1, t1e, t2e); \ + dct_wsub(x2, t1e, t2e); \ + /* odd part */ \ + int16x8_t sum15 = vaddq_s16(row1, row5); \ + int16x8_t sum17 = vaddq_s16(row1, row7); \ + int16x8_t sum35 = vaddq_s16(row3, row5); \ + int16x8_t sum37 = vaddq_s16(row3, row7); \ + int16x8_t sumodd = vaddq_s16(sum17, sum35); \ + dct_long_mul(p5o, sumodd, rot1_0); \ + dct_long_mac(p1o, p5o, sum17, rot1_1); \ + dct_long_mac(p2o, p5o, sum35, rot1_2); \ + dct_long_mul(p3o, sum37, rot2_0); \ + dct_long_mul(p4o, sum15, rot2_1); \ + dct_wadd(sump13o, p1o, p3o); \ + dct_wadd(sump24o, p2o, p4o); \ + dct_wadd(sump23o, p2o, p3o); \ + dct_wadd(sump14o, p1o, p4o); \ + dct_long_mac(x4, sump13o, row7, rot3_0); \ + dct_long_mac(x5, sump24o, row5, rot3_1); \ + dct_long_mac(x6, sump23o, row3, rot3_2); \ + dct_long_mac(x7, sump14o, row1, rot3_3); \ + dct_bfly32o(row0, row7, x0, x7, shiftop, shift); \ + dct_bfly32o(row1, row6, x1, x6, shiftop, shift); \ + dct_bfly32o(row2, row5, x2, x5, shiftop, shift); \ + dct_bfly32o(row3, row4, x3, x4, shiftop, shift); \ + } + + // load + row0 = vld1q_s16(data + 0 * 8); + row1 = vld1q_s16(data + 1 * 8); + row2 = vld1q_s16(data + 2 * 8); + row3 = vld1q_s16(data + 3 * 8); + row4 = vld1q_s16(data + 4 * 8); + row5 = vld1q_s16(data + 5 * 8); + row6 = vld1q_s16(data + 6 * 8); + row7 = vld1q_s16(data + 7 * 8); + + // add DC bias + row0 = vaddq_s16(row0, vsetq_lane_s16(1024, vdupq_n_s16(0), 0)); + + // column pass + dct_pass(vrshrn_n_s32, 10); + + // 16bit 8x8 transpose + { +// these three map to a single VTRN.16, VTRN.32, and VSWP, respectively. +// whether compilers actually get this is another story, sadly. +#define dct_trn16(x, y) \ + { \ + int16x8x2_t t = vtrnq_s16(x, y); \ + x = t.val[0]; \ + y = t.val[1]; \ + } +#define dct_trn32(x, y) \ + { \ + int32x4x2_t t = vtrnq_s32(vreinterpretq_s32_s16(x), vreinterpretq_s32_s16(y)); \ + x = vreinterpretq_s16_s32(t.val[0]); \ + y = vreinterpretq_s16_s32(t.val[1]); \ + } +#define dct_trn64(x, y) \ + { \ + int16x8_t x0 = x; \ + int16x8_t y0 = y; \ + x = vcombine_s16(vget_low_s16(x0), vget_low_s16(y0)); \ + y = vcombine_s16(vget_high_s16(x0), vget_high_s16(y0)); \ + } + + // pass 1 + dct_trn16(row0, row1); // a0b0a2b2a4b4a6b6 + dct_trn16(row2, row3); + dct_trn16(row4, row5); + dct_trn16(row6, row7); + + // pass 2 + dct_trn32(row0, row2); // a0b0c0d0a4b4c4d4 + dct_trn32(row1, row3); + dct_trn32(row4, row6); + dct_trn32(row5, row7); + + // pass 3 + dct_trn64(row0, row4); // a0b0c0d0e0f0g0h0 + dct_trn64(row1, row5); + dct_trn64(row2, row6); + dct_trn64(row3, row7); + +#undef dct_trn16 +#undef dct_trn32 +#undef dct_trn64 + } + + // row pass + // vrshrn_n_s32 only supports shifts up to 16, we need + // 17. so do a non-rounding shift of 16 first then follow + // up with a rounding shift by 1. + dct_pass(vshrn_n_s32, 16); + + { + // pack and round + uint8x8_t p0 = vqrshrun_n_s16(row0, 1); + uint8x8_t p1 = vqrshrun_n_s16(row1, 1); + uint8x8_t p2 = vqrshrun_n_s16(row2, 1); + uint8x8_t p3 = vqrshrun_n_s16(row3, 1); + uint8x8_t p4 = vqrshrun_n_s16(row4, 1); + uint8x8_t p5 = vqrshrun_n_s16(row5, 1); + uint8x8_t p6 = vqrshrun_n_s16(row6, 1); + uint8x8_t p7 = vqrshrun_n_s16(row7, 1); + + // again, these can translate into one instruction, but often don't. +#define dct_trn8_8(x, y) \ + { \ + uint8x8x2_t t = vtrn_u8(x, y); \ + x = t.val[0]; \ + y = t.val[1]; \ + } +#define dct_trn8_16(x, y) \ + { \ + uint16x4x2_t t = vtrn_u16(vreinterpret_u16_u8(x), vreinterpret_u16_u8(y)); \ + x = vreinterpret_u8_u16(t.val[0]); \ + y = vreinterpret_u8_u16(t.val[1]); \ + } +#define dct_trn8_32(x, y) \ + { \ + uint32x2x2_t t = vtrn_u32(vreinterpret_u32_u8(x), vreinterpret_u32_u8(y)); \ + x = vreinterpret_u8_u32(t.val[0]); \ + y = vreinterpret_u8_u32(t.val[1]); \ + } + + // sadly can't use interleaved stores here since we only write + // 8 bytes to each scan line! + + // 8x8 8-bit transpose pass 1 + dct_trn8_8(p0, p1); + dct_trn8_8(p2, p3); + dct_trn8_8(p4, p5); + dct_trn8_8(p6, p7); + + // pass 2 + dct_trn8_16(p0, p2); + dct_trn8_16(p1, p3); + dct_trn8_16(p4, p6); + dct_trn8_16(p5, p7); + + // pass 3 + dct_trn8_32(p0, p4); + dct_trn8_32(p1, p5); + dct_trn8_32(p2, p6); + dct_trn8_32(p3, p7); + + // store + vst1_u8(out, p0); + out += out_stride; + vst1_u8(out, p1); + out += out_stride; + vst1_u8(out, p2); + out += out_stride; + vst1_u8(out, p3); + out += out_stride; + vst1_u8(out, p4); + out += out_stride; + vst1_u8(out, p5); + out += out_stride; + vst1_u8(out, p6); + out += out_stride; + vst1_u8(out, p7); + +#undef dct_trn8_8 +#undef dct_trn8_16 +#undef dct_trn8_32 + } + +#undef dct_long_mul +#undef dct_long_mac +#undef dct_widen +#undef dct_wadd +#undef dct_wsub +#undef dct_bfly32o +#undef dct_pass +} + +#endif // STBI_NEON + +#define STBI__MARKER_none 0xff +// if there's a pending marker from the entropy stream, return that +// otherwise, fetch from the stream and get a marker. if there's no +// marker, return 0xff, which is never a valid marker value +static stbi_uc stbi__get_marker(stbi__jpeg * j) { + stbi_uc x; + if (j->marker != STBI__MARKER_none) { + x = j->marker; + j->marker = STBI__MARKER_none; + return x; + } + x = stbi__get8(j->s); + if (x != 0xff) + return STBI__MARKER_none; + while (x == 0xff) + x = stbi__get8(j->s); // consume repeated 0xff fill bytes + return x; +} + +// in each scan, we'll have scan_n components, and the order +// of the components is specified by order[] +#define STBI__RESTART(x) ((x) >= 0xd0 && (x) <= 0xd7) + +// after a restart interval, stbi__jpeg_reset the entropy decoder and +// the dc prediction +static void stbi__jpeg_reset(stbi__jpeg * j) { + j->code_bits = 0; + j->code_buffer = 0; + j->nomore = 0; + j->img_comp[0].dc_pred = j->img_comp[1].dc_pred = j->img_comp[2].dc_pred = j->img_comp[3].dc_pred = 0; + j->marker = STBI__MARKER_none; + j->todo = j->restart_interval ? j->restart_interval : 0x7fffffff; + j->eob_run = 0; + // no more than 1<<31 MCUs if no restart_interal? that's plenty safe, + // since we don't even allow 1<<30 pixels +} + +static int stbi__parse_entropy_coded_data(stbi__jpeg * z) { + stbi__jpeg_reset(z); + if (!z->progressive) { + if (z->scan_n == 1) { + int i, j; + STBI_SIMD_ALIGN(short, data[64]); + int n = z->order[0]; + // non-interleaved data, we just need to process one block at a time, + // in trivial scanline order + // number of blocks to do just depends on how many actual "pixels" this + // component has, independent of interleaved MCU blocking and such + int w = (z->img_comp[n].x + 7) >> 3; + int h = (z->img_comp[n].y + 7) >> 3; + for (j = 0; j < h; ++j) { + for (i = 0; i < w; ++i) { + int ha = z->img_comp[n].ha; + if (!stbi__jpeg_decode_block(z, data, z->huff_dc + z->img_comp[n].hd, z->huff_ac + ha, z->fast_ac[ha], n, + z->dequant[z->img_comp[n].tq])) + return 0; + z->idct_block_kernel(z->img_comp[n].data + z->img_comp[n].w2 * j * 8 + i * 8, z->img_comp[n].w2, data); + // every data block is an MCU, so countdown the restart interval + if (--z->todo <= 0) { + if (z->code_bits < 24) + stbi__grow_buffer_unsafe(z); + // if it's NOT a restart, then just bail, so we get corrupt data + // rather than no data + if (!STBI__RESTART(z->marker)) + return 1; + stbi__jpeg_reset(z); + } + } + } + return 1; + } else { // interleaved + int i, j, k, x, y; + STBI_SIMD_ALIGN(short, data[64]); + for (j = 0; j < z->img_mcu_y; ++j) { + for (i = 0; i < z->img_mcu_x; ++i) { + // scan an interleaved mcu... process scan_n components in order + for (k = 0; k < z->scan_n; ++k) { + int n = z->order[k]; + // scan out an mcu's worth of this component; that's just determined + // by the basic H and V specified for the component + for (y = 0; y < z->img_comp[n].v; ++y) { + for (x = 0; x < z->img_comp[n].h; ++x) { + int x2 = (i * z->img_comp[n].h + x) * 8; + int y2 = (j * z->img_comp[n].v + y) * 8; + int ha = z->img_comp[n].ha; + if (!stbi__jpeg_decode_block(z, data, z->huff_dc + z->img_comp[n].hd, z->huff_ac + ha, + z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) + return 0; + z->idct_block_kernel(z->img_comp[n].data + z->img_comp[n].w2 * y2 + x2, z->img_comp[n].w2, + data); + } + } + } + // after all interleaved components, that's an interleaved MCU, + // so now count down the restart interval + if (--z->todo <= 0) { + if (z->code_bits < 24) + stbi__grow_buffer_unsafe(z); + if (!STBI__RESTART(z->marker)) + return 1; + stbi__jpeg_reset(z); + } + } + } + return 1; + } + } else { + if (z->scan_n == 1) { + int i, j; + int n = z->order[0]; + // non-interleaved data, we just need to process one block at a time, + // in trivial scanline order + // number of blocks to do just depends on how many actual "pixels" this + // component has, independent of interleaved MCU blocking and such + int w = (z->img_comp[n].x + 7) >> 3; + int h = (z->img_comp[n].y + 7) >> 3; + for (j = 0; j < h; ++j) { + for (i = 0; i < w; ++i) { + short * data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w); + if (z->spec_start == 0) { + if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n)) + return 0; + } else { + int ha = z->img_comp[n].ha; + if (!stbi__jpeg_decode_block_prog_ac(z, data, &z->huff_ac[ha], z->fast_ac[ha])) + return 0; + } + // every data block is an MCU, so countdown the restart interval + if (--z->todo <= 0) { + if (z->code_bits < 24) + stbi__grow_buffer_unsafe(z); + if (!STBI__RESTART(z->marker)) + return 1; + stbi__jpeg_reset(z); + } + } + } + return 1; + } else { // interleaved + int i, j, k, x, y; + for (j = 0; j < z->img_mcu_y; ++j) { + for (i = 0; i < z->img_mcu_x; ++i) { + // scan an interleaved mcu... process scan_n components in order + for (k = 0; k < z->scan_n; ++k) { + int n = z->order[k]; + // scan out an mcu's worth of this component; that's just determined + // by the basic H and V specified for the component + for (y = 0; y < z->img_comp[n].v; ++y) { + for (x = 0; x < z->img_comp[n].h; ++x) { + int x2 = (i * z->img_comp[n].h + x); + int y2 = (j * z->img_comp[n].v + y); + short * data = z->img_comp[n].coeff + 64 * (x2 + y2 * z->img_comp[n].coeff_w); + if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n)) + return 0; + } + } + } + // after all interleaved components, that's an interleaved MCU, + // so now count down the restart interval + if (--z->todo <= 0) { + if (z->code_bits < 24) + stbi__grow_buffer_unsafe(z); + if (!STBI__RESTART(z->marker)) + return 1; + stbi__jpeg_reset(z); + } + } + } + return 1; + } + } +} + +static void stbi__jpeg_dequantize(short * data, stbi__uint16 * dequant) { + int i; + for (i = 0; i < 64; ++i) + data[i] *= dequant[i]; +} + +static void stbi__jpeg_finish(stbi__jpeg * z) { + if (z->progressive) { + // dequantize and idct the data + int i, j, n; + for (n = 0; n < z->s->img_n; ++n) { + int w = (z->img_comp[n].x + 7) >> 3; + int h = (z->img_comp[n].y + 7) >> 3; + for (j = 0; j < h; ++j) { + for (i = 0; i < w; ++i) { + short * data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w); + stbi__jpeg_dequantize(data, z->dequant[z->img_comp[n].tq]); + z->idct_block_kernel(z->img_comp[n].data + z->img_comp[n].w2 * j * 8 + i * 8, z->img_comp[n].w2, data); + } + } + } + } +} + +static int stbi__process_marker(stbi__jpeg * z, int m) { + int L; + switch (m) { + case STBI__MARKER_none: // no marker found + return stbi__err("expected marker", "Corrupt JPEG"); + + case 0xDD: // DRI - specify restart interval + if (stbi__get16be(z->s) != 4) + return stbi__err("bad DRI len", "Corrupt JPEG"); + z->restart_interval = stbi__get16be(z->s); + return 1; + + case 0xDB: // DQT - define quantization table + L = stbi__get16be(z->s) - 2; + while (L > 0) { + int q = stbi__get8(z->s); + int p = q >> 4, sixteen = (p != 0); + int t = q & 15, i; + if (p != 0 && p != 1) + return stbi__err("bad DQT type", "Corrupt JPEG"); + if (t > 3) + return stbi__err("bad DQT table", "Corrupt JPEG"); + + for (i = 0; i < 64; ++i) + z->dequant[t][stbi__jpeg_dezigzag[i]] = (stbi__uint16)(sixteen ? stbi__get16be(z->s) : stbi__get8(z->s)); + L -= (sixteen ? 129 : 65); + } + return L == 0; + + case 0xC4: // DHT - define huffman table + L = stbi__get16be(z->s) - 2; + while (L > 0) { + stbi_uc * v; + int sizes[16], i, n = 0; + int q = stbi__get8(z->s); + int tc = q >> 4; + int th = q & 15; + if (tc > 1 || th > 3) + return stbi__err("bad DHT header", "Corrupt JPEG"); + for (i = 0; i < 16; ++i) { + sizes[i] = stbi__get8(z->s); + n += sizes[i]; + } + if (n > 256) + return stbi__err("bad DHT header", "Corrupt JPEG"); // Loop over i < n would write past end of values! + L -= 17; + if (tc == 0) { + if (!stbi__build_huffman(z->huff_dc + th, sizes)) + return 0; + v = z->huff_dc[th].values; + } else { + if (!stbi__build_huffman(z->huff_ac + th, sizes)) + return 0; + v = z->huff_ac[th].values; + } + for (i = 0; i < n; ++i) + v[i] = stbi__get8(z->s); + if (tc != 0) + stbi__build_fast_ac(z->fast_ac[th], z->huff_ac + th); + L -= n; + } + return L == 0; + } + + // check for comment block or APP blocks + if ((m >= 0xE0 && m <= 0xEF) || m == 0xFE) { + L = stbi__get16be(z->s); + if (L < 2) { + if (m == 0xFE) + return stbi__err("bad COM len", "Corrupt JPEG"); + else + return stbi__err("bad APP len", "Corrupt JPEG"); + } + L -= 2; + + if (m == 0xE0 && L >= 5) { // JFIF APP0 segment + static const unsigned char tag[5] = {'J', 'F', 'I', 'F', '\0'}; + int ok = 1; + int i; + for (i = 0; i < 5; ++i) + if (stbi__get8(z->s) != tag[i]) + ok = 0; + L -= 5; + if (ok) + z->jfif = 1; + } else if (m == 0xEE && L >= 12) { // Adobe APP14 segment + static const unsigned char tag[6] = {'A', 'd', 'o', 'b', 'e', '\0'}; + int ok = 1; + int i; + for (i = 0; i < 6; ++i) + if (stbi__get8(z->s) != tag[i]) + ok = 0; + L -= 6; + if (ok) { + stbi__get8(z->s); // version + stbi__get16be(z->s); // flags0 + stbi__get16be(z->s); // flags1 + z->app14_color_transform = stbi__get8(z->s); // color transform + L -= 6; + } + } + + stbi__skip(z->s, L); + return 1; + } + + return stbi__err("unknown marker", "Corrupt JPEG"); +} + +// after we see SOS +static int stbi__process_scan_header(stbi__jpeg * z) { + int i; + int Ls = stbi__get16be(z->s); + z->scan_n = stbi__get8(z->s); + if (z->scan_n < 1 || z->scan_n > 4 || z->scan_n > (int)z->s->img_n) + return stbi__err("bad SOS component count", "Corrupt JPEG"); + if (Ls != 6 + 2 * z->scan_n) + return stbi__err("bad SOS len", "Corrupt JPEG"); + for (i = 0; i < z->scan_n; ++i) { + int id = stbi__get8(z->s), which; + int q = stbi__get8(z->s); + for (which = 0; which < z->s->img_n; ++which) + if (z->img_comp[which].id == id) + break; + if (which == z->s->img_n) + return 0; // no match + z->img_comp[which].hd = q >> 4; + if (z->img_comp[which].hd > 3) + return stbi__err("bad DC huff", "Corrupt JPEG"); + z->img_comp[which].ha = q & 15; + if (z->img_comp[which].ha > 3) + return stbi__err("bad AC huff", "Corrupt JPEG"); + z->order[i] = which; + } + + { + int aa; + z->spec_start = stbi__get8(z->s); + z->spec_end = stbi__get8(z->s); // should be 63, but might be 0 + aa = stbi__get8(z->s); + z->succ_high = (aa >> 4); + z->succ_low = (aa & 15); + if (z->progressive) { + if (z->spec_start > 63 || z->spec_end > 63 || z->spec_start > z->spec_end || z->succ_high > 13 || z->succ_low > 13) + return stbi__err("bad SOS", "Corrupt JPEG"); + } else { + if (z->spec_start != 0) + return stbi__err("bad SOS", "Corrupt JPEG"); + if (z->succ_high != 0 || z->succ_low != 0) + return stbi__err("bad SOS", "Corrupt JPEG"); + z->spec_end = 63; + } + } + + return 1; +} + +static int stbi__free_jpeg_components(stbi__jpeg * z, int ncomp, int why) { + int i; + for (i = 0; i < ncomp; ++i) { + if (z->img_comp[i].raw_data) { + STBI_FREE(z->img_comp[i].raw_data); + z->img_comp[i].raw_data = NULL; + z->img_comp[i].data = NULL; + } + if (z->img_comp[i].raw_coeff) { + STBI_FREE(z->img_comp[i].raw_coeff); + z->img_comp[i].raw_coeff = 0; + z->img_comp[i].coeff = 0; + } + if (z->img_comp[i].linebuf) { + STBI_FREE(z->img_comp[i].linebuf); + z->img_comp[i].linebuf = NULL; + } + } + return why; +} + +static int stbi__process_frame_header(stbi__jpeg * z, int scan) { + stbi__context * s = z->s; + int Lf, p, i, q, h_max = 1, v_max = 1, c; + Lf = stbi__get16be(s); + if (Lf < 11) + return stbi__err("bad SOF len", "Corrupt JPEG"); // JPEG + p = stbi__get8(s); + if (p != 8) + return stbi__err("only 8-bit", "JPEG format not supported: 8-bit only"); // JPEG baseline + s->img_y = stbi__get16be(s); + if (s->img_y == 0) + return stbi__err("no header height", + "JPEG format not supported: delayed height"); // Legal, but we don't handle it--but neither does IJG + s->img_x = stbi__get16be(s); + if (s->img_x == 0) + return stbi__err("0 width", "Corrupt JPEG"); // JPEG requires + if (s->img_y > STBI_MAX_DIMENSIONS) + return stbi__err("too large", "Very large image (corrupt?)"); + if (s->img_x > STBI_MAX_DIMENSIONS) + return stbi__err("too large", "Very large image (corrupt?)"); + c = stbi__get8(s); + if (c != 3 && c != 1 && c != 4) + return stbi__err("bad component count", "Corrupt JPEG"); + s->img_n = c; + for (i = 0; i < c; ++i) { + z->img_comp[i].data = NULL; + z->img_comp[i].linebuf = NULL; + } + + if (Lf != 8 + 3 * s->img_n) + return stbi__err("bad SOF len", "Corrupt JPEG"); + + z->rgb = 0; + for (i = 0; i < s->img_n; ++i) { + static const unsigned char rgb[3] = {'R', 'G', 'B'}; + z->img_comp[i].id = stbi__get8(s); + if (s->img_n == 3 && z->img_comp[i].id == rgb[i]) + ++z->rgb; + q = stbi__get8(s); + z->img_comp[i].h = (q >> 4); + if (!z->img_comp[i].h || z->img_comp[i].h > 4) + return stbi__err("bad H", "Corrupt JPEG"); + z->img_comp[i].v = q & 15; + if (!z->img_comp[i].v || z->img_comp[i].v > 4) + return stbi__err("bad V", "Corrupt JPEG"); + z->img_comp[i].tq = stbi__get8(s); + if (z->img_comp[i].tq > 3) + return stbi__err("bad TQ", "Corrupt JPEG"); + } + + if (scan != STBI__SCAN_load) + return 1; + + if (!stbi__mad3sizes_valid(s->img_x, s->img_y, s->img_n, 0)) + return stbi__err("too large", "Image too large to decode"); + + for (i = 0; i < s->img_n; ++i) { + if (z->img_comp[i].h > h_max) + h_max = z->img_comp[i].h; + if (z->img_comp[i].v > v_max) + v_max = z->img_comp[i].v; + } + + // check that plane subsampling factors are integer ratios; our resamplers can't deal with fractional ratios + // and I've never seen a non-corrupted JPEG file actually use them + for (i = 0; i < s->img_n; ++i) { + if (h_max % z->img_comp[i].h != 0) + return stbi__err("bad H", "Corrupt JPEG"); + if (v_max % z->img_comp[i].v != 0) + return stbi__err("bad V", "Corrupt JPEG"); + } + + // compute interleaved mcu info + z->img_h_max = h_max; + z->img_v_max = v_max; + z->img_mcu_w = h_max * 8; + z->img_mcu_h = v_max * 8; + // these sizes can't be more than 17 bits + z->img_mcu_x = (s->img_x + z->img_mcu_w - 1) / z->img_mcu_w; + z->img_mcu_y = (s->img_y + z->img_mcu_h - 1) / z->img_mcu_h; + + for (i = 0; i < s->img_n; ++i) { + // number of effective pixels (e.g. for non-interleaved MCU) + z->img_comp[i].x = (s->img_x * z->img_comp[i].h + h_max - 1) / h_max; + z->img_comp[i].y = (s->img_y * z->img_comp[i].v + v_max - 1) / v_max; + // to simplify generation, we'll allocate enough memory to decode + // the bogus oversized data from using interleaved MCUs and their + // big blocks (e.g. a 16x16 iMCU on an image of width 33); we won't + // discard the extra data until colorspace conversion + // + // img_mcu_x, img_mcu_y: <=17 bits; comp[i].h and .v are <=4 (checked earlier) + // so these muls can't overflow with 32-bit ints (which we require) + z->img_comp[i].w2 = z->img_mcu_x * z->img_comp[i].h * 8; + z->img_comp[i].h2 = z->img_mcu_y * z->img_comp[i].v * 8; + z->img_comp[i].coeff = 0; + z->img_comp[i].raw_coeff = 0; + z->img_comp[i].linebuf = NULL; + z->img_comp[i].raw_data = stbi__malloc_mad2(z->img_comp[i].w2, z->img_comp[i].h2, 15); + if (z->img_comp[i].raw_data == NULL) + return stbi__free_jpeg_components(z, i + 1, stbi__err("outofmem", "Out of memory")); + // align blocks for idct using mmx/sse + z->img_comp[i].data = (stbi_uc *)(((size_t)z->img_comp[i].raw_data + 15) & ~15); + if (z->progressive) { + // w2, h2 are multiples of 8 (see above) + z->img_comp[i].coeff_w = z->img_comp[i].w2 / 8; + z->img_comp[i].coeff_h = z->img_comp[i].h2 / 8; + z->img_comp[i].raw_coeff = stbi__malloc_mad3(z->img_comp[i].w2, z->img_comp[i].h2, sizeof(short), 15); + if (z->img_comp[i].raw_coeff == NULL) + return stbi__free_jpeg_components(z, i + 1, stbi__err("outofmem", "Out of memory")); + z->img_comp[i].coeff = (short *)(((size_t)z->img_comp[i].raw_coeff + 15) & ~15); + } + } + + return 1; +} + +// use comparisons since in some cases we handle more than one case (e.g. SOF) +#define stbi__DNL(x) ((x) == 0xdc) +#define stbi__SOI(x) ((x) == 0xd8) +#define stbi__EOI(x) ((x) == 0xd9) +#define stbi__SOF(x) ((x) == 0xc0 || (x) == 0xc1 || (x) == 0xc2) +#define stbi__SOS(x) ((x) == 0xda) + +#define stbi__SOF_progressive(x) ((x) == 0xc2) + +static int stbi__decode_jpeg_header(stbi__jpeg * z, int scan) { + int m; + z->jfif = 0; + z->app14_color_transform = -1; // valid values are 0,1,2 + z->marker = STBI__MARKER_none; // initialize cached marker to empty + m = stbi__get_marker(z); + if (!stbi__SOI(m)) + return stbi__err("no SOI", "Corrupt JPEG"); + if (scan == STBI__SCAN_type) + return 1; + m = stbi__get_marker(z); + while (!stbi__SOF(m)) { + if (!stbi__process_marker(z, m)) + return 0; + m = stbi__get_marker(z); + while (m == STBI__MARKER_none) { + // some files have extra padding after their blocks, so ok, we'll scan + if (stbi__at_eof(z->s)) + return stbi__err("no SOF", "Corrupt JPEG"); + m = stbi__get_marker(z); + } + } + z->progressive = stbi__SOF_progressive(m); + if (!stbi__process_frame_header(z, scan)) + return 0; + return 1; +} + +static int stbi__skip_jpeg_junk_at_end(stbi__jpeg * j) { + // some JPEGs have junk at end, skip over it but if we find what looks + // like a valid marker, resume there + while (!stbi__at_eof(j->s)) { + int x = stbi__get8(j->s); + while (x == 255) { // might be a marker + if (stbi__at_eof(j->s)) + return STBI__MARKER_none; + x = stbi__get8(j->s); + if (x != 0x00 && x != 0xff) { + // not a stuffed zero or lead-in to another marker, looks + // like an actual marker, return it + return x; + } + // stuffed zero has x=0 now which ends the loop, meaning we go + // back to regular scan loop. + // repeated 0xff keeps trying to read the next byte of the marker. + } + } + return STBI__MARKER_none; +} + +// decode image to YCbCr format +static int stbi__decode_jpeg_image(stbi__jpeg * j) { + int m; + for (m = 0; m < 4; m++) { + j->img_comp[m].raw_data = NULL; + j->img_comp[m].raw_coeff = NULL; + } + j->restart_interval = 0; + if (!stbi__decode_jpeg_header(j, STBI__SCAN_load)) + return 0; + m = stbi__get_marker(j); + while (!stbi__EOI(m)) { + if (stbi__SOS(m)) { + if (!stbi__process_scan_header(j)) + return 0; + if (!stbi__parse_entropy_coded_data(j)) + return 0; + if (j->marker == STBI__MARKER_none) { + j->marker = stbi__skip_jpeg_junk_at_end(j); + // if we reach eof without hitting a marker, stbi__get_marker() below will fail and we'll eventually return 0 + } + m = stbi__get_marker(j); + if (STBI__RESTART(m)) + m = stbi__get_marker(j); + } else if (stbi__DNL(m)) { + int Ld = stbi__get16be(j->s); + stbi__uint32 NL = stbi__get16be(j->s); + if (Ld != 4) + return stbi__err("bad DNL len", "Corrupt JPEG"); + if (NL != j->s->img_y) + return stbi__err("bad DNL height", "Corrupt JPEG"); + m = stbi__get_marker(j); + } else { + if (!stbi__process_marker(j, m)) + return 1; + m = stbi__get_marker(j); + } + } + if (j->progressive) + stbi__jpeg_finish(j); + return 1; +} + +// static jfif-centered resampling (across block boundaries) + +typedef stbi_uc * (*resample_row_func)(stbi_uc * out, stbi_uc * in0, stbi_uc * in1, int w, int hs); + +#define stbi__div4(x) ((stbi_uc)((x) >> 2)) + +static stbi_uc * resample_row_1(stbi_uc * out, stbi_uc * in_near, stbi_uc * in_far, int w, int hs) { + STBI_NOTUSED(out); + STBI_NOTUSED(in_far); + STBI_NOTUSED(w); + STBI_NOTUSED(hs); + return in_near; +} + +static stbi_uc * stbi__resample_row_v_2(stbi_uc * out, stbi_uc * in_near, stbi_uc * in_far, int w, int hs) { + // need to generate two samples vertically for every one in input + int i; + STBI_NOTUSED(hs); + for (i = 0; i < w; ++i) + out[i] = stbi__div4(3 * in_near[i] + in_far[i] + 2); + return out; +} + +static stbi_uc * stbi__resample_row_h_2(stbi_uc * out, stbi_uc * in_near, stbi_uc * in_far, int w, int hs) { + // need to generate two samples horizontally for every one in input + int i; + stbi_uc * input = in_near; + + if (w == 1) { + // if only one sample, can't do any interpolation + out[0] = out[1] = input[0]; + return out; + } + + out[0] = input[0]; + out[1] = stbi__div4(input[0] * 3 + input[1] + 2); + for (i = 1; i < w - 1; ++i) { + int n = 3 * input[i] + 2; + out[i * 2 + 0] = stbi__div4(n + input[i - 1]); + out[i * 2 + 1] = stbi__div4(n + input[i + 1]); + } + out[i * 2 + 0] = stbi__div4(input[w - 2] * 3 + input[w - 1] + 2); + out[i * 2 + 1] = input[w - 1]; + + STBI_NOTUSED(in_far); + STBI_NOTUSED(hs); + + return out; +} + +#define stbi__div16(x) ((stbi_uc)((x) >> 4)) + +static stbi_uc * stbi__resample_row_hv_2(stbi_uc * out, stbi_uc * in_near, stbi_uc * in_far, int w, int hs) { + // need to generate 2x2 samples for every one in input + int i, t0, t1; + if (w == 1) { + out[0] = out[1] = stbi__div4(3 * in_near[0] + in_far[0] + 2); + return out; + } + + t1 = 3 * in_near[0] + in_far[0]; + out[0] = stbi__div4(t1 + 2); + for (i = 1; i < w; ++i) { + t0 = t1; + t1 = 3 * in_near[i] + in_far[i]; + out[i * 2 - 1] = stbi__div16(3 * t0 + t1 + 8); + out[i * 2] = stbi__div16(3 * t1 + t0 + 8); + } + out[w * 2 - 1] = stbi__div4(t1 + 2); + + STBI_NOTUSED(hs); + + return out; +} + +#if defined(STBI_SSE2) || defined(STBI_NEON) +static stbi_uc * stbi__resample_row_hv_2_simd(stbi_uc * out, stbi_uc * in_near, stbi_uc * in_far, int w, int hs) { + // need to generate 2x2 samples for every one in input + int i = 0, t0, t1; + + if (w == 1) { + out[0] = out[1] = stbi__div4(3 * in_near[0] + in_far[0] + 2); + return out; + } + + t1 = 3 * in_near[0] + in_far[0]; + // process groups of 8 pixels for as long as we can. + // note we can't handle the last pixel in a row in this loop + // because we need to handle the filter boundary conditions. + for (; i < ((w - 1) & ~7); i += 8) { +#if defined(STBI_SSE2) + // load and perform the vertical filtering pass + // this uses 3*x + y = 4*x + (y - x) + __m128i zero = _mm_setzero_si128(); + __m128i farb = _mm_loadl_epi64((__m128i *)(in_far + i)); + __m128i nearb = _mm_loadl_epi64((__m128i *)(in_near + i)); + __m128i farw = _mm_unpacklo_epi8(farb, zero); + __m128i nearw = _mm_unpacklo_epi8(nearb, zero); + __m128i diff = _mm_sub_epi16(farw, nearw); + __m128i nears = _mm_slli_epi16(nearw, 2); + __m128i curr = _mm_add_epi16(nears, diff); // current row + + // horizontal filter works the same based on shifted vers of current + // row. "prev" is current row shifted right by 1 pixel; we need to + // insert the previous pixel value (from t1). + // "next" is current row shifted left by 1 pixel, with first pixel + // of next block of 8 pixels added in. + __m128i prv0 = _mm_slli_si128(curr, 2); + __m128i nxt0 = _mm_srli_si128(curr, 2); + __m128i prev = _mm_insert_epi16(prv0, t1, 0); + __m128i next = _mm_insert_epi16(nxt0, 3 * in_near[i + 8] + in_far[i + 8], 7); + + // horizontal filter, polyphase implementation since it's convenient: + // even pixels = 3*cur + prev = cur*4 + (prev - cur) + // odd pixels = 3*cur + next = cur*4 + (next - cur) + // note the shared term. + __m128i bias = _mm_set1_epi16(8); + __m128i curs = _mm_slli_epi16(curr, 2); + __m128i prvd = _mm_sub_epi16(prev, curr); + __m128i nxtd = _mm_sub_epi16(next, curr); + __m128i curb = _mm_add_epi16(curs, bias); + __m128i even = _mm_add_epi16(prvd, curb); + __m128i odd = _mm_add_epi16(nxtd, curb); + + // interleave even and odd pixels, then undo scaling. + __m128i int0 = _mm_unpacklo_epi16(even, odd); + __m128i int1 = _mm_unpackhi_epi16(even, odd); + __m128i de0 = _mm_srli_epi16(int0, 4); + __m128i de1 = _mm_srli_epi16(int1, 4); + + // pack and write output + __m128i outv = _mm_packus_epi16(de0, de1); + _mm_storeu_si128((__m128i *)(out + i * 2), outv); +#elif defined(STBI_NEON) + // load and perform the vertical filtering pass + // this uses 3*x + y = 4*x + (y - x) + uint8x8_t farb = vld1_u8(in_far + i); + uint8x8_t nearb = vld1_u8(in_near + i); + int16x8_t diff = vreinterpretq_s16_u16(vsubl_u8(farb, nearb)); + int16x8_t nears = vreinterpretq_s16_u16(vshll_n_u8(nearb, 2)); + int16x8_t curr = vaddq_s16(nears, diff); // current row + + // horizontal filter works the same based on shifted vers of current + // row. "prev" is current row shifted right by 1 pixel; we need to + // insert the previous pixel value (from t1). + // "next" is current row shifted left by 1 pixel, with first pixel + // of next block of 8 pixels added in. + int16x8_t prv0 = vextq_s16(curr, curr, 7); + int16x8_t nxt0 = vextq_s16(curr, curr, 1); + int16x8_t prev = vsetq_lane_s16(t1, prv0, 0); + int16x8_t next = vsetq_lane_s16(3 * in_near[i + 8] + in_far[i + 8], nxt0, 7); + + // horizontal filter, polyphase implementation since it's convenient: + // even pixels = 3*cur + prev = cur*4 + (prev - cur) + // odd pixels = 3*cur + next = cur*4 + (next - cur) + // note the shared term. + int16x8_t curs = vshlq_n_s16(curr, 2); + int16x8_t prvd = vsubq_s16(prev, curr); + int16x8_t nxtd = vsubq_s16(next, curr); + int16x8_t even = vaddq_s16(curs, prvd); + int16x8_t odd = vaddq_s16(curs, nxtd); + + // undo scaling and round, then store with even/odd phases interleaved + uint8x8x2_t o; + o.val[0] = vqrshrun_n_s16(even, 4); + o.val[1] = vqrshrun_n_s16(odd, 4); + vst2_u8(out + i * 2, o); +#endif + + // "previous" value for next iter + t1 = 3 * in_near[i + 7] + in_far[i + 7]; + } + + t0 = t1; + t1 = 3 * in_near[i] + in_far[i]; + out[i * 2] = stbi__div16(3 * t1 + t0 + 8); + + for (++i; i < w; ++i) { + t0 = t1; + t1 = 3 * in_near[i] + in_far[i]; + out[i * 2 - 1] = stbi__div16(3 * t0 + t1 + 8); + out[i * 2] = stbi__div16(3 * t1 + t0 + 8); + } + out[w * 2 - 1] = stbi__div4(t1 + 2); + + STBI_NOTUSED(hs); + + return out; +} +#endif + +static stbi_uc * stbi__resample_row_generic(stbi_uc * out, stbi_uc * in_near, stbi_uc * in_far, int w, int hs) { + // resample with nearest-neighbor + int i, j; + STBI_NOTUSED(in_far); + for (i = 0; i < w; ++i) + for (j = 0; j < hs; ++j) + out[i * hs + j] = in_near[i]; + return out; +} + +// this is a reduced-precision calculation of YCbCr-to-RGB introduced +// to make sure the code produces the same results in both SIMD and scalar +#define stbi__float2fixed(x) (((int)((x)*4096.0f + 0.5f)) << 8) +static void stbi__YCbCr_to_RGB_row(stbi_uc * out, const stbi_uc * y, const stbi_uc * pcb, const stbi_uc * pcr, int count, + int step) { + int i; + for (i = 0; i < count; ++i) { + int y_fixed = (y[i] << 20) + (1 << 19); // rounding + int r, g, b; + int cr = pcr[i] - 128; + int cb = pcb[i] - 128; + r = y_fixed + cr * stbi__float2fixed(1.40200f); + g = y_fixed + (cr * -stbi__float2fixed(0.71414f)) + ((cb * -stbi__float2fixed(0.34414f)) & 0xffff0000); + b = y_fixed + cb * stbi__float2fixed(1.77200f); + r >>= 20; + g >>= 20; + b >>= 20; + if ((unsigned)r > 255) { + if (r < 0) + r = 0; + else + r = 255; + } + if ((unsigned)g > 255) { + if (g < 0) + g = 0; + else + g = 255; + } + if ((unsigned)b > 255) { + if (b < 0) + b = 0; + else + b = 255; + } + out[0] = (stbi_uc)r; + out[1] = (stbi_uc)g; + out[2] = (stbi_uc)b; + out[3] = 255; + out += step; + } +} + +#if defined(STBI_SSE2) || defined(STBI_NEON) +static void stbi__YCbCr_to_RGB_simd(stbi_uc * out, stbi_uc const * y, stbi_uc const * pcb, stbi_uc const * pcr, int count, + int step) { + int i = 0; + +#ifdef STBI_SSE2 + // step == 3 is pretty ugly on the final interleave, and i'm not convinced + // it's useful in practice (you wouldn't use it for textures, for example). + // so just accelerate step == 4 case. + if (step == 4) { + // this is a fairly straightforward implementation and not super-optimized. + __m128i signflip = _mm_set1_epi8(-0x80); + __m128i cr_const0 = _mm_set1_epi16((short)(1.40200f * 4096.0f + 0.5f)); + __m128i cr_const1 = _mm_set1_epi16(-(short)(0.71414f * 4096.0f + 0.5f)); + __m128i cb_const0 = _mm_set1_epi16(-(short)(0.34414f * 4096.0f + 0.5f)); + __m128i cb_const1 = _mm_set1_epi16((short)(1.77200f * 4096.0f + 0.5f)); + __m128i y_bias = _mm_set1_epi8((char)(unsigned char)128); + __m128i xw = _mm_set1_epi16(255); // alpha channel + + for (; i + 7 < count; i += 8) { + // load + __m128i y_bytes = _mm_loadl_epi64((__m128i *)(y + i)); + __m128i cr_bytes = _mm_loadl_epi64((__m128i *)(pcr + i)); + __m128i cb_bytes = _mm_loadl_epi64((__m128i *)(pcb + i)); + __m128i cr_biased = _mm_xor_si128(cr_bytes, signflip); // -128 + __m128i cb_biased = _mm_xor_si128(cb_bytes, signflip); // -128 + + // unpack to short (and left-shift cr, cb by 8) + __m128i yw = _mm_unpacklo_epi8(y_bias, y_bytes); + __m128i crw = _mm_unpacklo_epi8(_mm_setzero_si128(), cr_biased); + __m128i cbw = _mm_unpacklo_epi8(_mm_setzero_si128(), cb_biased); + + // color transform + __m128i yws = _mm_srli_epi16(yw, 4); + __m128i cr0 = _mm_mulhi_epi16(cr_const0, crw); + __m128i cb0 = _mm_mulhi_epi16(cb_const0, cbw); + __m128i cb1 = _mm_mulhi_epi16(cbw, cb_const1); + __m128i cr1 = _mm_mulhi_epi16(crw, cr_const1); + __m128i rws = _mm_add_epi16(cr0, yws); + __m128i gwt = _mm_add_epi16(cb0, yws); + __m128i bws = _mm_add_epi16(yws, cb1); + __m128i gws = _mm_add_epi16(gwt, cr1); + + // descale + __m128i rw = _mm_srai_epi16(rws, 4); + __m128i bw = _mm_srai_epi16(bws, 4); + __m128i gw = _mm_srai_epi16(gws, 4); + + // back to byte, set up for transpose + __m128i brb = _mm_packus_epi16(rw, bw); + __m128i gxb = _mm_packus_epi16(gw, xw); + + // transpose to interleave channels + __m128i t0 = _mm_unpacklo_epi8(brb, gxb); + __m128i t1 = _mm_unpackhi_epi8(brb, gxb); + __m128i o0 = _mm_unpacklo_epi16(t0, t1); + __m128i o1 = _mm_unpackhi_epi16(t0, t1); + + // store + _mm_storeu_si128((__m128i *)(out + 0), o0); + _mm_storeu_si128((__m128i *)(out + 16), o1); + out += 32; + } + } +#endif + +#ifdef STBI_NEON + // in this version, step=3 support would be easy to add. but is there demand? + if (step == 4) { + // this is a fairly straightforward implementation and not super-optimized. + uint8x8_t signflip = vdup_n_u8(0x80); + int16x8_t cr_const0 = vdupq_n_s16((short)(1.40200f * 4096.0f + 0.5f)); + int16x8_t cr_const1 = vdupq_n_s16(-(short)(0.71414f * 4096.0f + 0.5f)); + int16x8_t cb_const0 = vdupq_n_s16(-(short)(0.34414f * 4096.0f + 0.5f)); + int16x8_t cb_const1 = vdupq_n_s16((short)(1.77200f * 4096.0f + 0.5f)); + + for (; i + 7 < count; i += 8) { + // load + uint8x8_t y_bytes = vld1_u8(y + i); + uint8x8_t cr_bytes = vld1_u8(pcr + i); + uint8x8_t cb_bytes = vld1_u8(pcb + i); + int8x8_t cr_biased = vreinterpret_s8_u8(vsub_u8(cr_bytes, signflip)); + int8x8_t cb_biased = vreinterpret_s8_u8(vsub_u8(cb_bytes, signflip)); + + // expand to s16 + int16x8_t yws = vreinterpretq_s16_u16(vshll_n_u8(y_bytes, 4)); + int16x8_t crw = vshll_n_s8(cr_biased, 7); + int16x8_t cbw = vshll_n_s8(cb_biased, 7); + + // color transform + int16x8_t cr0 = vqdmulhq_s16(crw, cr_const0); + int16x8_t cb0 = vqdmulhq_s16(cbw, cb_const0); + int16x8_t cr1 = vqdmulhq_s16(crw, cr_const1); + int16x8_t cb1 = vqdmulhq_s16(cbw, cb_const1); + int16x8_t rws = vaddq_s16(yws, cr0); + int16x8_t gws = vaddq_s16(vaddq_s16(yws, cb0), cr1); + int16x8_t bws = vaddq_s16(yws, cb1); + + // undo scaling, round, convert to byte + uint8x8x4_t o; + o.val[0] = vqrshrun_n_s16(rws, 4); + o.val[1] = vqrshrun_n_s16(gws, 4); + o.val[2] = vqrshrun_n_s16(bws, 4); + o.val[3] = vdup_n_u8(255); + + // store, interleaving r/g/b/a + vst4_u8(out, o); + out += 8 * 4; + } + } +#endif + + for (; i < count; ++i) { + int y_fixed = (y[i] << 20) + (1 << 19); // rounding + int r, g, b; + int cr = pcr[i] - 128; + int cb = pcb[i] - 128; + r = y_fixed + cr * stbi__float2fixed(1.40200f); + g = y_fixed + cr * -stbi__float2fixed(0.71414f) + ((cb * -stbi__float2fixed(0.34414f)) & 0xffff0000); + b = y_fixed + cb * stbi__float2fixed(1.77200f); + r >>= 20; + g >>= 20; + b >>= 20; + if ((unsigned)r > 255) { + if (r < 0) + r = 0; + else + r = 255; + } + if ((unsigned)g > 255) { + if (g < 0) + g = 0; + else + g = 255; + } + if ((unsigned)b > 255) { + if (b < 0) + b = 0; + else + b = 255; + } + out[0] = (stbi_uc)r; + out[1] = (stbi_uc)g; + out[2] = (stbi_uc)b; + out[3] = 255; + out += step; + } +} +#endif + +// set up the kernels +static void stbi__setup_jpeg(stbi__jpeg * j) { + j->idct_block_kernel = stbi__idct_block; + j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_row; + j->resample_row_hv_2_kernel = stbi__resample_row_hv_2; + +#ifdef STBI_SSE2 + if (stbi__sse2_available()) { + j->idct_block_kernel = stbi__idct_simd; + j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd; + j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd; + } +#endif + +#ifdef STBI_NEON + j->idct_block_kernel = stbi__idct_simd; + j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd; + j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd; +#endif +} + +// clean up the temporary component buffers +static void stbi__cleanup_jpeg(stbi__jpeg * j) { stbi__free_jpeg_components(j, j->s->img_n, 0); } + +typedef struct { + resample_row_func resample; + stbi_uc *line0, *line1; + int hs, vs; // expansion factor in each axis + int w_lores; // horizontal pixels pre-expansion + int ystep; // how far through vertical expansion we are + int ypos; // which pre-expansion row we're on +} stbi__resample; + +// fast 0..255 * 0..255 => 0..255 rounded multiplication +static stbi_uc stbi__blinn_8x8(stbi_uc x, stbi_uc y) { + unsigned int t = x * y + 128; + return (stbi_uc)((t + (t >> 8)) >> 8); +} + +static stbi_uc * load_jpeg_image(stbi__jpeg * z, int * out_x, int * out_y, int * comp, int req_comp) { + int n, decode_n, is_rgb; + z->s->img_n = 0; // make stbi__cleanup_jpeg safe + + // validate req_comp + if (req_comp < 0 || req_comp > 4) + return stbi__errpuc("bad req_comp", "Internal error"); + + // load a jpeg image from whichever source, but leave in YCbCr format + if (!stbi__decode_jpeg_image(z)) { + stbi__cleanup_jpeg(z); + return NULL; + } + + // determine actual number of components to generate + n = req_comp ? req_comp : z->s->img_n >= 3 ? 3 : 1; + + is_rgb = z->s->img_n == 3 && (z->rgb == 3 || (z->app14_color_transform == 0 && !z->jfif)); + + if (z->s->img_n == 3 && n < 3 && !is_rgb) + decode_n = 1; + else + decode_n = z->s->img_n; + + // nothing to do if no components requested; check this now to avoid + // accessing uninitialized coutput[0] later + if (decode_n <= 0) { + stbi__cleanup_jpeg(z); + return NULL; + } + + // resample and color-convert + { + int k; + unsigned int i, j; + stbi_uc * output; + stbi_uc * coutput[4] = {NULL, NULL, NULL, NULL}; + + stbi__resample res_comp[4]; + + for (k = 0; k < decode_n; ++k) { + stbi__resample * r = &res_comp[k]; + + // allocate line buffer big enough for upsampling off the edges + // with upsample factor of 4 + z->img_comp[k].linebuf = (stbi_uc *)stbi__malloc(z->s->img_x + 3); + if (!z->img_comp[k].linebuf) { + stbi__cleanup_jpeg(z); + return stbi__errpuc("outofmem", "Out of memory"); + } + + r->hs = z->img_h_max / z->img_comp[k].h; + r->vs = z->img_v_max / z->img_comp[k].v; + r->ystep = r->vs >> 1; + r->w_lores = (z->s->img_x + r->hs - 1) / r->hs; + r->ypos = 0; + r->line0 = r->line1 = z->img_comp[k].data; + + if (r->hs == 1 && r->vs == 1) + r->resample = resample_row_1; + else if (r->hs == 1 && r->vs == 2) + r->resample = stbi__resample_row_v_2; + else if (r->hs == 2 && r->vs == 1) + r->resample = stbi__resample_row_h_2; + else if (r->hs == 2 && r->vs == 2) + r->resample = z->resample_row_hv_2_kernel; + else + r->resample = stbi__resample_row_generic; + } + + // can't error after this so, this is safe + output = (stbi_uc *)stbi__malloc_mad3(n, z->s->img_x, z->s->img_y, 1); + if (!output) { + stbi__cleanup_jpeg(z); + return stbi__errpuc("outofmem", "Out of memory"); + } + + // now go ahead and resample + for (j = 0; j < z->s->img_y; ++j) { + stbi_uc * out = output + n * z->s->img_x * j; + for (k = 0; k < decode_n; ++k) { + stbi__resample * r = &res_comp[k]; + int y_bot = r->ystep >= (r->vs >> 1); + coutput[k] = r->resample(z->img_comp[k].linebuf, y_bot ? r->line1 : r->line0, y_bot ? r->line0 : r->line1, + r->w_lores, r->hs); + if (++r->ystep >= r->vs) { + r->ystep = 0; + r->line0 = r->line1; + if (++r->ypos < z->img_comp[k].y) + r->line1 += z->img_comp[k].w2; + } + } + if (n >= 3) { + stbi_uc * y = coutput[0]; + if (z->s->img_n == 3) { + if (is_rgb) { + for (i = 0; i < z->s->img_x; ++i) { + out[0] = y[i]; + out[1] = coutput[1][i]; + out[2] = coutput[2][i]; + out[3] = 255; + out += n; + } + } else { + z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); + } + } else if (z->s->img_n == 4) { + if (z->app14_color_transform == 0) { // CMYK + for (i = 0; i < z->s->img_x; ++i) { + stbi_uc m = coutput[3][i]; + out[0] = stbi__blinn_8x8(coutput[0][i], m); + out[1] = stbi__blinn_8x8(coutput[1][i], m); + out[2] = stbi__blinn_8x8(coutput[2][i], m); + out[3] = 255; + out += n; + } + } else if (z->app14_color_transform == 2) { // YCCK + z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); + for (i = 0; i < z->s->img_x; ++i) { + stbi_uc m = coutput[3][i]; + out[0] = stbi__blinn_8x8(255 - out[0], m); + out[1] = stbi__blinn_8x8(255 - out[1], m); + out[2] = stbi__blinn_8x8(255 - out[2], m); + out += n; + } + } else { // YCbCr + alpha? Ignore the fourth channel for now + z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); + } + } else + for (i = 0; i < z->s->img_x; ++i) { + out[0] = out[1] = out[2] = y[i]; + out[3] = 255; // not used if n==3 + out += n; + } + } else { + if (is_rgb) { + if (n == 1) + for (i = 0; i < z->s->img_x; ++i) + *out++ = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]); + else { + for (i = 0; i < z->s->img_x; ++i, out += 2) { + out[0] = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]); + out[1] = 255; + } + } + } else if (z->s->img_n == 4 && z->app14_color_transform == 0) { + for (i = 0; i < z->s->img_x; ++i) { + stbi_uc m = coutput[3][i]; + stbi_uc r = stbi__blinn_8x8(coutput[0][i], m); + stbi_uc g = stbi__blinn_8x8(coutput[1][i], m); + stbi_uc b = stbi__blinn_8x8(coutput[2][i], m); + out[0] = stbi__compute_y(r, g, b); + out[1] = 255; + out += n; + } + } else if (z->s->img_n == 4 && z->app14_color_transform == 2) { + for (i = 0; i < z->s->img_x; ++i) { + out[0] = stbi__blinn_8x8(255 - coutput[0][i], coutput[3][i]); + out[1] = 255; + out += n; + } + } else { + stbi_uc * y = coutput[0]; + if (n == 1) + for (i = 0; i < z->s->img_x; ++i) + out[i] = y[i]; + else + for (i = 0; i < z->s->img_x; ++i) { + *out++ = y[i]; + *out++ = 255; + } + } + } + } + stbi__cleanup_jpeg(z); + *out_x = z->s->img_x; + *out_y = z->s->img_y; + if (comp) + *comp = z->s->img_n >= 3 ? 3 : 1; // report original components, not output + return output; + } +} + +static void * stbi__jpeg_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri) { + unsigned char * result; + stbi__jpeg * j = (stbi__jpeg *)stbi__malloc(sizeof(stbi__jpeg)); + if (!j) + return stbi__errpuc("outofmem", "Out of memory"); + memset(j, 0, sizeof(stbi__jpeg)); + STBI_NOTUSED(ri); + j->s = s; + stbi__setup_jpeg(j); + result = load_jpeg_image(j, x, y, comp, req_comp); + STBI_FREE(j); + return result; +} + +static int stbi__jpeg_test(stbi__context * s) { + int r; + stbi__jpeg * j = (stbi__jpeg *)stbi__malloc(sizeof(stbi__jpeg)); + if (!j) + return stbi__err("outofmem", "Out of memory"); + memset(j, 0, sizeof(stbi__jpeg)); + j->s = s; + stbi__setup_jpeg(j); + r = stbi__decode_jpeg_header(j, STBI__SCAN_type); + stbi__rewind(s); + STBI_FREE(j); + return r; +} + +static int stbi__jpeg_info_raw(stbi__jpeg * j, int * x, int * y, int * comp) { + if (!stbi__decode_jpeg_header(j, STBI__SCAN_header)) { + stbi__rewind(j->s); + return 0; + } + if (x) + *x = j->s->img_x; + if (y) + *y = j->s->img_y; + if (comp) + *comp = j->s->img_n >= 3 ? 3 : 1; + return 1; +} + +static int stbi__jpeg_info(stbi__context * s, int * x, int * y, int * comp) { + int result; + stbi__jpeg * j = (stbi__jpeg *)(stbi__malloc(sizeof(stbi__jpeg))); + if (!j) + return stbi__err("outofmem", "Out of memory"); + memset(j, 0, sizeof(stbi__jpeg)); + j->s = s; + result = stbi__jpeg_info_raw(j, x, y, comp); + STBI_FREE(j); + return result; +} +#endif + +// public domain zlib decode v0.2 Sean Barrett 2006-11-18 +// simple implementation +// - all input must be provided in an upfront buffer +// - all output is written to a single output buffer (can malloc/realloc) +// performance +// - fast huffman + +#ifndef STBI_NO_ZLIB + +// fast-way is faster to check than jpeg huffman, but slow way is slower +#define STBI__ZFAST_BITS 9 // accelerate all cases in default tables +#define STBI__ZFAST_MASK ((1 << STBI__ZFAST_BITS) - 1) +#define STBI__ZNSYMS 288 // number of symbols in literal/length alphabet + +// zlib-style huffman encoding +// (jpegs packs from left, zlib from right, so can't share code) +typedef struct { + stbi__uint16 fast[1 << STBI__ZFAST_BITS]; + stbi__uint16 firstcode[16]; + int maxcode[17]; + stbi__uint16 firstsymbol[16]; + stbi_uc size[STBI__ZNSYMS]; + stbi__uint16 value[STBI__ZNSYMS]; +} stbi__zhuffman; + +stbi_inline static int stbi__bitreverse16(int n) { + n = ((n & 0xAAAA) >> 1) | ((n & 0x5555) << 1); + n = ((n & 0xCCCC) >> 2) | ((n & 0x3333) << 2); + n = ((n & 0xF0F0) >> 4) | ((n & 0x0F0F) << 4); + n = ((n & 0xFF00) >> 8) | ((n & 0x00FF) << 8); + return n; +} + +stbi_inline static int stbi__bit_reverse(int v, int bits) { + STBI_ASSERT(bits <= 16); + // to bit reverse n bits, reverse 16 and shift + // e.g. 11 bits, bit reverse and shift away 5 + return stbi__bitreverse16(v) >> (16 - bits); +} + +static int stbi__zbuild_huffman(stbi__zhuffman * z, const stbi_uc * sizelist, int num) { + int i, k = 0; + int code, next_code[16], sizes[17]; + + // DEFLATE spec for generating codes + memset(sizes, 0, sizeof(sizes)); + memset(z->fast, 0, sizeof(z->fast)); + for (i = 0; i < num; ++i) + ++sizes[sizelist[i]]; + sizes[0] = 0; + for (i = 1; i < 16; ++i) + if (sizes[i] > (1 << i)) + return stbi__err("bad sizes", "Corrupt PNG"); + code = 0; + for (i = 1; i < 16; ++i) { + next_code[i] = code; + z->firstcode[i] = (stbi__uint16)code; + z->firstsymbol[i] = (stbi__uint16)k; + code = (code + sizes[i]); + if (sizes[i]) + if (code - 1 >= (1 << i)) + return stbi__err("bad codelengths", "Corrupt PNG"); + z->maxcode[i] = code << (16 - i); // preshift for inner loop + code <<= 1; + k += sizes[i]; + } + z->maxcode[16] = 0x10000; // sentinel + for (i = 0; i < num; ++i) { + int s = sizelist[i]; + if (s) { + int c = next_code[s] - z->firstcode[s] + z->firstsymbol[s]; + stbi__uint16 fastv = (stbi__uint16)((s << 9) | i); + z->size[c] = (stbi_uc)s; + z->value[c] = (stbi__uint16)i; + if (s <= STBI__ZFAST_BITS) { + int j = stbi__bit_reverse(next_code[s], s); + while (j < (1 << STBI__ZFAST_BITS)) { + z->fast[j] = fastv; + j += (1 << s); + } + } + ++next_code[s]; + } + } + return 1; +} + +// zlib-from-memory implementation for PNG reading +// because PNG allows splitting the zlib stream arbitrarily, +// and it's annoying structurally to have PNG call ZLIB call PNG, +// we require PNG read all the IDATs and combine them into a single +// memory buffer + +typedef struct { + stbi_uc *zbuffer, *zbuffer_end; + int num_bits; + stbi__uint32 code_buffer; + + char * zout; + char * zout_start; + char * zout_end; + int z_expandable; + + stbi__zhuffman z_length, z_distance; +} stbi__zbuf; + +stbi_inline static int stbi__zeof(stbi__zbuf * z) { return (z->zbuffer >= z->zbuffer_end); } + +stbi_inline static stbi_uc stbi__zget8(stbi__zbuf * z) { return stbi__zeof(z) ? 0 : *z->zbuffer++; } + +static void stbi__fill_bits(stbi__zbuf * z) { + do { + if (z->code_buffer >= (1U << z->num_bits)) { + z->zbuffer = z->zbuffer_end; /* treat this as EOF so we fail. */ + return; + } + z->code_buffer |= (unsigned int)stbi__zget8(z) << z->num_bits; + z->num_bits += 8; + } while (z->num_bits <= 24); +} + +stbi_inline static unsigned int stbi__zreceive(stbi__zbuf * z, int n) { + unsigned int k; + if (z->num_bits < n) + stbi__fill_bits(z); + k = z->code_buffer & ((1 << n) - 1); + z->code_buffer >>= n; + z->num_bits -= n; + return k; +} + +static int stbi__zhuffman_decode_slowpath(stbi__zbuf * a, stbi__zhuffman * z) { + int b, s, k; + // not resolved by fast table, so compute it the slow way + // use jpeg approach, which requires MSbits at top + k = stbi__bit_reverse(a->code_buffer, 16); + for (s = STBI__ZFAST_BITS + 1;; ++s) + if (k < z->maxcode[s]) + break; + if (s >= 16) + return -1; // invalid code! + // code size is s, so: + b = (k >> (16 - s)) - z->firstcode[s] + z->firstsymbol[s]; + if (b >= STBI__ZNSYMS) + return -1; // some data was corrupt somewhere! + if (z->size[b] != s) + return -1; // was originally an assert, but report failure instead. + a->code_buffer >>= s; + a->num_bits -= s; + return z->value[b]; +} + +stbi_inline static int stbi__zhuffman_decode(stbi__zbuf * a, stbi__zhuffman * z) { + int b, s; + if (a->num_bits < 16) { + if (stbi__zeof(a)) { + return -1; /* report error for unexpected end of data. */ + } + stbi__fill_bits(a); + } + b = z->fast[a->code_buffer & STBI__ZFAST_MASK]; + if (b) { + s = b >> 9; + a->code_buffer >>= s; + a->num_bits -= s; + return b & 511; + } + return stbi__zhuffman_decode_slowpath(a, z); +} + +static int stbi__zexpand(stbi__zbuf * z, char * zout, int n) // need to make room for n bytes +{ + char * q; + unsigned int cur, limit, old_limit; + z->zout = zout; + if (!z->z_expandable) + return stbi__err("output buffer limit", "Corrupt PNG"); + cur = (unsigned int)(z->zout - z->zout_start); + limit = old_limit = (unsigned)(z->zout_end - z->zout_start); + if (UINT_MAX - cur < (unsigned)n) + return stbi__err("outofmem", "Out of memory"); + while (cur + n > limit) { + if (limit > UINT_MAX / 2) + return stbi__err("outofmem", "Out of memory"); + limit *= 2; + } + q = (char *)STBI_REALLOC_SIZED(z->zout_start, old_limit, limit); + STBI_NOTUSED(old_limit); + if (q == NULL) + return stbi__err("outofmem", "Out of memory"); + z->zout_start = q; + z->zout = q + cur; + z->zout_end = q + limit; + return 1; +} + +static const int stbi__zlength_base[31] = {3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31, + 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0}; + +static const int stbi__zlength_extra[31] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, + 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0, 0, 0}; + +static const int stbi__zdist_base[32] = {1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, + 49, 65, 97, 129, 193, 257, 385, 513, 769, 1025, 1537, + 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577, 0, 0}; + +static const int stbi__zdist_extra[32] = {0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, + 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13}; + +static int stbi__parse_huffman_block(stbi__zbuf * a) { + char * zout = a->zout; + for (;;) { + int z = stbi__zhuffman_decode(a, &a->z_length); + if (z < 256) { + if (z < 0) + return stbi__err("bad huffman code", "Corrupt PNG"); // error in huffman codes + if (zout >= a->zout_end) { + if (!stbi__zexpand(a, zout, 1)) + return 0; + zout = a->zout; + } + *zout++ = (char)z; + } else { + stbi_uc * p; + int len, dist; + if (z == 256) { + a->zout = zout; + return 1; + } + if (z >= 286) + return stbi__err("bad huffman code", + "Corrupt PNG"); // per DEFLATE, length codes 286 and 287 must not appear in compressed data + z -= 257; + len = stbi__zlength_base[z]; + if (stbi__zlength_extra[z]) + len += stbi__zreceive(a, stbi__zlength_extra[z]); + z = stbi__zhuffman_decode(a, &a->z_distance); + if (z < 0 || z >= 30) + return stbi__err("bad huffman code", + "Corrupt PNG"); // per DEFLATE, distance codes 30 and 31 must not appear in compressed data + dist = stbi__zdist_base[z]; + if (stbi__zdist_extra[z]) + dist += stbi__zreceive(a, stbi__zdist_extra[z]); + if (zout - a->zout_start < dist) + return stbi__err("bad dist", "Corrupt PNG"); + if (zout + len > a->zout_end) { + if (!stbi__zexpand(a, zout, len)) + return 0; + zout = a->zout; + } + p = (stbi_uc *)(zout - dist); + if (dist == 1) { // run of one byte; common in images. + stbi_uc v = *p; + if (len) { + do + *zout++ = v; + while (--len); + } + } else { + if (len) { + do + *zout++ = *p++; + while (--len); + } + } + } + } +} + +static int stbi__compute_huffman_codes(stbi__zbuf * a) { + static const stbi_uc length_dezigzag[19] = {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15}; + stbi__zhuffman z_codelength; + stbi_uc lencodes[286 + 32 + 137]; // padding for maximum single op + stbi_uc codelength_sizes[19]; + int i, n; + + int hlit = stbi__zreceive(a, 5) + 257; + int hdist = stbi__zreceive(a, 5) + 1; + int hclen = stbi__zreceive(a, 4) + 4; + int ntot = hlit + hdist; + + memset(codelength_sizes, 0, sizeof(codelength_sizes)); + for (i = 0; i < hclen; ++i) { + int s = stbi__zreceive(a, 3); + codelength_sizes[length_dezigzag[i]] = (stbi_uc)s; + } + if (!stbi__zbuild_huffman(&z_codelength, codelength_sizes, 19)) + return 0; + + n = 0; + while (n < ntot) { + int c = stbi__zhuffman_decode(a, &z_codelength); + if (c < 0 || c >= 19) + return stbi__err("bad codelengths", "Corrupt PNG"); + if (c < 16) + lencodes[n++] = (stbi_uc)c; + else { + stbi_uc fill = 0; + if (c == 16) { + c = stbi__zreceive(a, 2) + 3; + if (n == 0) + return stbi__err("bad codelengths", "Corrupt PNG"); + fill = lencodes[n - 1]; + } else if (c == 17) { + c = stbi__zreceive(a, 3) + 3; + } else if (c == 18) { + c = stbi__zreceive(a, 7) + 11; + } else { + return stbi__err("bad codelengths", "Corrupt PNG"); + } + if (ntot - n < c) + return stbi__err("bad codelengths", "Corrupt PNG"); + memset(lencodes + n, fill, c); + n += c; + } + } + if (n != ntot) + return stbi__err("bad codelengths", "Corrupt PNG"); + if (!stbi__zbuild_huffman(&a->z_length, lencodes, hlit)) + return 0; + if (!stbi__zbuild_huffman(&a->z_distance, lencodes + hlit, hdist)) + return 0; + return 1; +} + +static int stbi__parse_uncompressed_block(stbi__zbuf * a) { + stbi_uc header[4]; + int len, nlen, k; + if (a->num_bits & 7) + stbi__zreceive(a, a->num_bits & 7); // discard + // drain the bit-packed data into header + k = 0; + while (a->num_bits > 0) { + header[k++] = (stbi_uc)(a->code_buffer & 255); // suppress MSVC run-time check + a->code_buffer >>= 8; + a->num_bits -= 8; + } + if (a->num_bits < 0) + return stbi__err("zlib corrupt", "Corrupt PNG"); + // now fill header the normal way + while (k < 4) + header[k++] = stbi__zget8(a); + len = header[1] * 256 + header[0]; + nlen = header[3] * 256 + header[2]; + if (nlen != (len ^ 0xffff)) + return stbi__err("zlib corrupt", "Corrupt PNG"); + if (a->zbuffer + len > a->zbuffer_end) + return stbi__err("read past buffer", "Corrupt PNG"); + if (a->zout + len > a->zout_end) + if (!stbi__zexpand(a, a->zout, len)) + return 0; + memcpy(a->zout, a->zbuffer, len); + a->zbuffer += len; + a->zout += len; + return 1; +} + +static int stbi__parse_zlib_header(stbi__zbuf * a) { + int cmf = stbi__zget8(a); + int cm = cmf & 15; + /* int cinfo = cmf >> 4; */ + int flg = stbi__zget8(a); + if (stbi__zeof(a)) + return stbi__err("bad zlib header", "Corrupt PNG"); // zlib spec + if ((cmf * 256 + flg) % 31 != 0) + return stbi__err("bad zlib header", "Corrupt PNG"); // zlib spec + if (flg & 32) + return stbi__err("no preset dict", "Corrupt PNG"); // preset dictionary not allowed in png + if (cm != 8) + return stbi__err("bad compression", "Corrupt PNG"); // DEFLATE required for png + // window = 1 << (8 + cinfo)... but who cares, we fully buffer output + return 1; +} + +static const stbi_uc stbi__zdefault_length[STBI__ZNSYMS] = { + 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, + 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, + 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, + 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, + 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, + 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, + 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, + 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8}; +static const stbi_uc stbi__zdefault_distance[32] = {5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, + 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5}; +/* +Init algorithm: +{ + int i; // use <= to match clearly with spec + for (i=0; i <= 143; ++i) stbi__zdefault_length[i] = 8; + for ( ; i <= 255; ++i) stbi__zdefault_length[i] = 9; + for ( ; i <= 279; ++i) stbi__zdefault_length[i] = 7; + for ( ; i <= 287; ++i) stbi__zdefault_length[i] = 8; + + for (i=0; i <= 31; ++i) stbi__zdefault_distance[i] = 5; +} +*/ + +static int stbi__parse_zlib(stbi__zbuf * a, int parse_header) { + int final, type; + if (parse_header) + if (!stbi__parse_zlib_header(a)) + return 0; + a->num_bits = 0; + a->code_buffer = 0; + do { + final = stbi__zreceive(a, 1); + type = stbi__zreceive(a, 2); + if (type == 0) { + if (!stbi__parse_uncompressed_block(a)) + return 0; + } else if (type == 3) { + return 0; + } else { + if (type == 1) { + // use fixed code lengths + if (!stbi__zbuild_huffman(&a->z_length, stbi__zdefault_length, STBI__ZNSYMS)) + return 0; + if (!stbi__zbuild_huffman(&a->z_distance, stbi__zdefault_distance, 32)) + return 0; + } else { + if (!stbi__compute_huffman_codes(a)) + return 0; + } + if (!stbi__parse_huffman_block(a)) + return 0; + } + } while (!final); + return 1; +} + +static int stbi__do_zlib(stbi__zbuf * a, char * obuf, int olen, int exp, int parse_header) { + a->zout_start = obuf; + a->zout = obuf; + a->zout_end = obuf + olen; + a->z_expandable = exp; + + return stbi__parse_zlib(a, parse_header); +} + +STBIDEF char * stbi_zlib_decode_malloc_guesssize(const char * buffer, int len, int initial_size, int * outlen) { + stbi__zbuf a; + char * p = (char *)stbi__malloc(initial_size); + if (p == NULL) + return NULL; + a.zbuffer = (stbi_uc *)buffer; + a.zbuffer_end = (stbi_uc *)buffer + len; + if (stbi__do_zlib(&a, p, initial_size, 1, 1)) { + if (outlen) + *outlen = (int)(a.zout - a.zout_start); + return a.zout_start; + } else { + STBI_FREE(a.zout_start); + return NULL; + } +} + +STBIDEF char * stbi_zlib_decode_malloc(char const * buffer, int len, int * outlen) { + return stbi_zlib_decode_malloc_guesssize(buffer, len, 16384, outlen); +} + +STBIDEF char * stbi_zlib_decode_malloc_guesssize_headerflag(const char * buffer, int len, int initial_size, int * outlen, + int parse_header) { + stbi__zbuf a; + char * p = (char *)stbi__malloc(initial_size); + if (p == NULL) + return NULL; + a.zbuffer = (stbi_uc *)buffer; + a.zbuffer_end = (stbi_uc *)buffer + len; + if (stbi__do_zlib(&a, p, initial_size, 1, parse_header)) { + if (outlen) + *outlen = (int)(a.zout - a.zout_start); + return a.zout_start; + } else { + STBI_FREE(a.zout_start); + return NULL; + } +} + +STBIDEF int stbi_zlib_decode_buffer(char * obuffer, int olen, char const * ibuffer, int ilen) { + stbi__zbuf a; + a.zbuffer = (stbi_uc *)ibuffer; + a.zbuffer_end = (stbi_uc *)ibuffer + ilen; + if (stbi__do_zlib(&a, obuffer, olen, 0, 1)) + return (int)(a.zout - a.zout_start); + else + return -1; +} + +STBIDEF char * stbi_zlib_decode_noheader_malloc(char const * buffer, int len, int * outlen) { + stbi__zbuf a; + char * p = (char *)stbi__malloc(16384); + if (p == NULL) + return NULL; + a.zbuffer = (stbi_uc *)buffer; + a.zbuffer_end = (stbi_uc *)buffer + len; + if (stbi__do_zlib(&a, p, 16384, 1, 0)) { + if (outlen) + *outlen = (int)(a.zout - a.zout_start); + return a.zout_start; + } else { + STBI_FREE(a.zout_start); + return NULL; + } +} + +STBIDEF int stbi_zlib_decode_noheader_buffer(char * obuffer, int olen, const char * ibuffer, int ilen) { + stbi__zbuf a; + a.zbuffer = (stbi_uc *)ibuffer; + a.zbuffer_end = (stbi_uc *)ibuffer + ilen; + if (stbi__do_zlib(&a, obuffer, olen, 0, 0)) + return (int)(a.zout - a.zout_start); + else + return -1; +} +#endif + +// public domain "baseline" PNG decoder v0.10 Sean Barrett 2006-11-18 +// simple implementation +// - only 8-bit samples +// - no CRC checking +// - allocates lots of intermediate memory +// - avoids problem of streaming data between subsystems +// - avoids explicit window management +// performance +// - uses stb_zlib, a PD zlib implementation with fast huffman decoding + +#ifndef STBI_NO_PNG +typedef struct { + stbi__uint32 length; + stbi__uint32 type; +} stbi__pngchunk; + +static stbi__pngchunk stbi__get_chunk_header(stbi__context * s) { + stbi__pngchunk c; + c.length = stbi__get32be(s); + c.type = stbi__get32be(s); + return c; +} + +static int stbi__check_png_header(stbi__context * s) { + static const stbi_uc png_sig[8] = {137, 80, 78, 71, 13, 10, 26, 10}; + int i; + for (i = 0; i < 8; ++i) + if (stbi__get8(s) != png_sig[i]) + return stbi__err("bad png sig", "Not a PNG"); + return 1; +} + +typedef struct { + stbi__context * s; + stbi_uc *idata, *expanded, *out; + int depth; +} stbi__png; + +enum { + STBI__F_none = 0, + STBI__F_sub = 1, + STBI__F_up = 2, + STBI__F_avg = 3, + STBI__F_paeth = 4, + // synthetic filters used for first scanline to avoid needing a dummy row of 0s + STBI__F_avg_first, + STBI__F_paeth_first +}; + +static stbi_uc first_row_filter[5] = {STBI__F_none, STBI__F_sub, STBI__F_none, STBI__F_avg_first, STBI__F_paeth_first}; + +static int stbi__paeth(int a, int b, int c) { + int p = a + b - c; + int pa = abs(p - a); + int pb = abs(p - b); + int pc = abs(p - c); + if (pa <= pb && pa <= pc) + return a; + if (pb <= pc) + return b; + return c; +} + +static const stbi_uc stbi__depth_scale_table[9] = {0, 0xff, 0x55, 0, 0x11, 0, 0, 0, 0x01}; + +// create the png data from post-deflated data +static int stbi__create_png_image_raw(stbi__png * a, stbi_uc * raw, stbi__uint32 raw_len, int out_n, stbi__uint32 x, + stbi__uint32 y, int depth, int color) { + int bytes = (depth == 16 ? 2 : 1); + stbi__context * s = a->s; + stbi__uint32 i, j, stride = x * out_n * bytes; + stbi__uint32 img_len, img_width_bytes; + int k; + int img_n = s->img_n; // copy it into a local for later + + int output_bytes = out_n * bytes; + int filter_bytes = img_n * bytes; + int width = x; + + STBI_ASSERT(out_n == s->img_n || out_n == s->img_n + 1); + a->out = (stbi_uc *)stbi__malloc_mad3(x, y, output_bytes, 0); // extra bytes to write off the end into + if (!a->out) + return stbi__err("outofmem", "Out of memory"); + + if (!stbi__mad3sizes_valid(img_n, x, depth, 7)) + return stbi__err("too large", "Corrupt PNG"); + img_width_bytes = (((img_n * x * depth) + 7) >> 3); + img_len = (img_width_bytes + 1) * y; + + // we used to check for exact match between raw_len and img_len on non-interlaced PNGs, + // but issue #276 reported a PNG in the wild that had extra data at the end (all zeros), + // so just check for raw_len < img_len always. + if (raw_len < img_len) + return stbi__err("not enough pixels", "Corrupt PNG"); + + for (j = 0; j < y; ++j) { + stbi_uc * cur = a->out + stride * j; + stbi_uc * prior; + int filter = *raw++; + + if (filter > 4) + return stbi__err("invalid filter", "Corrupt PNG"); + + if (depth < 8) { + if (img_width_bytes > x) + return stbi__err("invalid width", "Corrupt PNG"); + cur += x * out_n - img_width_bytes; // store output to the rightmost img_len bytes, so we can decode in place + filter_bytes = 1; + width = img_width_bytes; + } + prior = cur - stride; // bugfix: need to compute this after 'cur +=' computation above + + // if first row, use special filter that doesn't sample previous row + if (j == 0) + filter = first_row_filter[filter]; + + // handle first byte explicitly + for (k = 0; k < filter_bytes; ++k) { + switch (filter) { + case STBI__F_none: + cur[k] = raw[k]; + break; + case STBI__F_sub: + cur[k] = raw[k]; + break; + case STBI__F_up: + cur[k] = STBI__BYTECAST(raw[k] + prior[k]); + break; + case STBI__F_avg: + cur[k] = STBI__BYTECAST(raw[k] + (prior[k] >> 1)); + break; + case STBI__F_paeth: + cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(0, prior[k], 0)); + break; + case STBI__F_avg_first: + cur[k] = raw[k]; + break; + case STBI__F_paeth_first: + cur[k] = raw[k]; + break; + } + } + + if (depth == 8) { + if (img_n != out_n) + cur[img_n] = 255; // first pixel + raw += img_n; + cur += out_n; + prior += out_n; + } else if (depth == 16) { + if (img_n != out_n) { + cur[filter_bytes] = 255; // first pixel top byte + cur[filter_bytes + 1] = 255; // first pixel bottom byte + } + raw += filter_bytes; + cur += output_bytes; + prior += output_bytes; + } else { + raw += 1; + cur += 1; + prior += 1; + } + + // this is a little gross, so that we don't switch per-pixel or per-component + if (depth < 8 || img_n == out_n) { + int nk = (width - 1) * filter_bytes; +#define STBI__CASE(f) \ + case f: \ + for (k = 0; k < nk; ++k) + switch (filter) { + // "none" filter turns into a memcpy here; make that explicit. + case STBI__F_none: + memcpy(cur, raw, nk); + break; + STBI__CASE(STBI__F_sub) { cur[k] = STBI__BYTECAST(raw[k] + cur[k - filter_bytes]); } + break; + STBI__CASE(STBI__F_up) { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); } + break; + STBI__CASE(STBI__F_avg) { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k - filter_bytes]) >> 1)); } + break; + STBI__CASE(STBI__F_paeth) { + cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k - filter_bytes], prior[k], prior[k - filter_bytes])); + } + break; + STBI__CASE(STBI__F_avg_first) { cur[k] = STBI__BYTECAST(raw[k] + (cur[k - filter_bytes] >> 1)); } + break; + STBI__CASE(STBI__F_paeth_first) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k - filter_bytes], 0, 0)); } + break; + } +#undef STBI__CASE + raw += nk; + } else { + STBI_ASSERT(img_n + 1 == out_n); +#define STBI__CASE(f) \ + case f: \ + for (i = x - 1; i >= 1; --i, cur[filter_bytes] = 255, raw += filter_bytes, cur += output_bytes, prior += output_bytes) \ + for (k = 0; k < filter_bytes; ++k) + switch (filter) { + STBI__CASE(STBI__F_none) { cur[k] = raw[k]; } + break; + STBI__CASE(STBI__F_sub) { cur[k] = STBI__BYTECAST(raw[k] + cur[k - output_bytes]); } + break; + STBI__CASE(STBI__F_up) { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); } + break; + STBI__CASE(STBI__F_avg) { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k - output_bytes]) >> 1)); } + break; + STBI__CASE(STBI__F_paeth) { + cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k - output_bytes], prior[k], prior[k - output_bytes])); + } + break; + STBI__CASE(STBI__F_avg_first) { cur[k] = STBI__BYTECAST(raw[k] + (cur[k - output_bytes] >> 1)); } + break; + STBI__CASE(STBI__F_paeth_first) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k - output_bytes], 0, 0)); } + break; + } +#undef STBI__CASE + + // the loop above sets the high byte of the pixels' alpha, but for + // 16 bit png files we also need the low byte set. we'll do that here. + if (depth == 16) { + cur = a->out + stride * j; // start at the beginning of the row again + for (i = 0; i < x; ++i, cur += output_bytes) { + cur[filter_bytes + 1] = 255; + } + } + } + } + + // we make a separate pass to expand bits to pixels; for performance, + // this could run two scanlines behind the above code, so it won't + // intefere with filtering but will still be in the cache. + if (depth < 8) { + for (j = 0; j < y; ++j) { + stbi_uc * cur = a->out + stride * j; + stbi_uc * in = a->out + stride * j + x * out_n - img_width_bytes; + // unpack 1/2/4-bit into a 8-bit buffer. allows us to keep the common 8-bit path optimal at minimal cost for + // 1/2/4-bit png guarante byte alignment, if width is not multiple of 8/4/2 we'll decode dummy trailing data that + // will be skipped in the later loop + stbi_uc scale = (color == 0) ? stbi__depth_scale_table[depth] : 1; // scale grayscale values to 0..255 range + + // note that the final byte might overshoot and write more data than desired. + // we can allocate enough data that this never writes out of memory, but it + // could also overwrite the next scanline. can it overwrite non-empty data + // on the next scanline? yes, consider 1-pixel-wide scanlines with 1-bit-per-pixel. + // so we need to explicitly clamp the final ones + + if (depth == 4) { + for (k = x * img_n; k >= 2; k -= 2, ++in) { + *cur++ = scale * ((*in >> 4)); + *cur++ = scale * ((*in) & 0x0f); + } + if (k > 0) + *cur++ = scale * ((*in >> 4)); + } else if (depth == 2) { + for (k = x * img_n; k >= 4; k -= 4, ++in) { + *cur++ = scale * ((*in >> 6)); + *cur++ = scale * ((*in >> 4) & 0x03); + *cur++ = scale * ((*in >> 2) & 0x03); + *cur++ = scale * ((*in) & 0x03); + } + if (k > 0) + *cur++ = scale * ((*in >> 6)); + if (k > 1) + *cur++ = scale * ((*in >> 4) & 0x03); + if (k > 2) + *cur++ = scale * ((*in >> 2) & 0x03); + } else if (depth == 1) { + for (k = x * img_n; k >= 8; k -= 8, ++in) { + *cur++ = scale * ((*in >> 7)); + *cur++ = scale * ((*in >> 6) & 0x01); + *cur++ = scale * ((*in >> 5) & 0x01); + *cur++ = scale * ((*in >> 4) & 0x01); + *cur++ = scale * ((*in >> 3) & 0x01); + *cur++ = scale * ((*in >> 2) & 0x01); + *cur++ = scale * ((*in >> 1) & 0x01); + *cur++ = scale * ((*in) & 0x01); + } + if (k > 0) + *cur++ = scale * ((*in >> 7)); + if (k > 1) + *cur++ = scale * ((*in >> 6) & 0x01); + if (k > 2) + *cur++ = scale * ((*in >> 5) & 0x01); + if (k > 3) + *cur++ = scale * ((*in >> 4) & 0x01); + if (k > 4) + *cur++ = scale * ((*in >> 3) & 0x01); + if (k > 5) + *cur++ = scale * ((*in >> 2) & 0x01); + if (k > 6) + *cur++ = scale * ((*in >> 1) & 0x01); + } + if (img_n != out_n) { + int q; + // insert alpha = 255 + cur = a->out + stride * j; + if (img_n == 1) { + for (q = x - 1; q >= 0; --q) { + cur[q * 2 + 1] = 255; + cur[q * 2 + 0] = cur[q]; + } + } else { + STBI_ASSERT(img_n == 3); + for (q = x - 1; q >= 0; --q) { + cur[q * 4 + 3] = 255; + cur[q * 4 + 2] = cur[q * 3 + 2]; + cur[q * 4 + 1] = cur[q * 3 + 1]; + cur[q * 4 + 0] = cur[q * 3 + 0]; + } + } + } + } + } else if (depth == 16) { + // force the image data from big-endian to platform-native. + // this is done in a separate pass due to the decoding relying + // on the data being untouched, but could probably be done + // per-line during decode if care is taken. + stbi_uc * cur = a->out; + stbi__uint16 * cur16 = (stbi__uint16 *)cur; + + for (i = 0; i < x * y * out_n; ++i, cur16++, cur += 2) { + *cur16 = (cur[0] << 8) | cur[1]; + } + } + + return 1; +} + +static int stbi__create_png_image(stbi__png * a, stbi_uc * image_data, stbi__uint32 image_data_len, int out_n, int depth, + int color, int interlaced) { + int bytes = (depth == 16 ? 2 : 1); + int out_bytes = out_n * bytes; + stbi_uc * final; + int p; + if (!interlaced) + return stbi__create_png_image_raw(a, image_data, image_data_len, out_n, a->s->img_x, a->s->img_y, depth, color); + + // de-interlacing + final = (stbi_uc *)stbi__malloc_mad3(a->s->img_x, a->s->img_y, out_bytes, 0); + if (!final) + return stbi__err("outofmem", "Out of memory"); + for (p = 0; p < 7; ++p) { + int xorig[] = {0, 4, 0, 2, 0, 1, 0}; + int yorig[] = {0, 0, 4, 0, 2, 0, 1}; + int xspc[] = {8, 8, 4, 4, 2, 2, 1}; + int yspc[] = {8, 8, 8, 4, 4, 2, 2}; + int i, j, x, y; + // pass1_x[4] = 0, pass1_x[5] = 1, pass1_x[12] = 1 + x = (a->s->img_x - xorig[p] + xspc[p] - 1) / xspc[p]; + y = (a->s->img_y - yorig[p] + yspc[p] - 1) / yspc[p]; + if (x && y) { + stbi__uint32 img_len = ((((a->s->img_n * x * depth) + 7) >> 3) + 1) * y; + if (!stbi__create_png_image_raw(a, image_data, image_data_len, out_n, x, y, depth, color)) { + STBI_FREE(final); + return 0; + } + for (j = 0; j < y; ++j) { + for (i = 0; i < x; ++i) { + int out_y = j * yspc[p] + yorig[p]; + int out_x = i * xspc[p] + xorig[p]; + memcpy(final + out_y * a->s->img_x * out_bytes + out_x * out_bytes, a->out + (j * x + i) * out_bytes, + out_bytes); + } + } + STBI_FREE(a->out); + image_data += img_len; + image_data_len -= img_len; + } + } + a->out = final; + + return 1; +} + +static int stbi__compute_transparency(stbi__png * z, stbi_uc tc[3], int out_n) { + stbi__context * s = z->s; + stbi__uint32 i, pixel_count = s->img_x * s->img_y; + stbi_uc * p = z->out; + + // compute color-based transparency, assuming we've + // already got 255 as the alpha value in the output + STBI_ASSERT(out_n == 2 || out_n == 4); + + if (out_n == 2) { + for (i = 0; i < pixel_count; ++i) { + p[1] = (p[0] == tc[0] ? 0 : 255); + p += 2; + } + } else { + for (i = 0; i < pixel_count; ++i) { + if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2]) + p[3] = 0; + p += 4; + } + } + return 1; +} + +static int stbi__compute_transparency16(stbi__png * z, stbi__uint16 tc[3], int out_n) { + stbi__context * s = z->s; + stbi__uint32 i, pixel_count = s->img_x * s->img_y; + stbi__uint16 * p = (stbi__uint16 *)z->out; + + // compute color-based transparency, assuming we've + // already got 65535 as the alpha value in the output + STBI_ASSERT(out_n == 2 || out_n == 4); + + if (out_n == 2) { + for (i = 0; i < pixel_count; ++i) { + p[1] = (p[0] == tc[0] ? 0 : 65535); + p += 2; + } + } else { + for (i = 0; i < pixel_count; ++i) { + if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2]) + p[3] = 0; + p += 4; + } + } + return 1; +} + +static int stbi__expand_png_palette(stbi__png * a, stbi_uc * palette, int len, int pal_img_n) { + stbi__uint32 i, pixel_count = a->s->img_x * a->s->img_y; + stbi_uc *p, *temp_out, *orig = a->out; + + p = (stbi_uc *)stbi__malloc_mad2(pixel_count, pal_img_n, 0); + if (p == NULL) + return stbi__err("outofmem", "Out of memory"); + + // between here and free(out) below, exitting would leak + temp_out = p; + + if (pal_img_n == 3) { + for (i = 0; i < pixel_count; ++i) { + int n = orig[i] * 4; + p[0] = palette[n]; + p[1] = palette[n + 1]; + p[2] = palette[n + 2]; + p += 3; + } + } else { + for (i = 0; i < pixel_count; ++i) { + int n = orig[i] * 4; + p[0] = palette[n]; + p[1] = palette[n + 1]; + p[2] = palette[n + 2]; + p[3] = palette[n + 3]; + p += 4; + } + } + STBI_FREE(a->out); + a->out = temp_out; + + STBI_NOTUSED(len); + + return 1; +} + +static int stbi__unpremultiply_on_load_global = 0; +static int stbi__de_iphone_flag_global = 0; + +STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply) { + stbi__unpremultiply_on_load_global = flag_true_if_should_unpremultiply; +} + +STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert) { + stbi__de_iphone_flag_global = flag_true_if_should_convert; +} + +#ifndef STBI_THREAD_LOCAL +#define stbi__unpremultiply_on_load stbi__unpremultiply_on_load_global +#define stbi__de_iphone_flag stbi__de_iphone_flag_global +#else +static STBI_THREAD_LOCAL int stbi__unpremultiply_on_load_local, stbi__unpremultiply_on_load_set; +static STBI_THREAD_LOCAL int stbi__de_iphone_flag_local, stbi__de_iphone_flag_set; + +STBIDEF void stbi_set_unpremultiply_on_load_thread(int flag_true_if_should_unpremultiply) { + stbi__unpremultiply_on_load_local = flag_true_if_should_unpremultiply; + stbi__unpremultiply_on_load_set = 1; +} + +STBIDEF void stbi_convert_iphone_png_to_rgb_thread(int flag_true_if_should_convert) { + stbi__de_iphone_flag_local = flag_true_if_should_convert; + stbi__de_iphone_flag_set = 1; +} + +#define stbi__unpremultiply_on_load \ + (stbi__unpremultiply_on_load_set ? stbi__unpremultiply_on_load_local : stbi__unpremultiply_on_load_global) +#define stbi__de_iphone_flag (stbi__de_iphone_flag_set ? stbi__de_iphone_flag_local : stbi__de_iphone_flag_global) +#endif // STBI_THREAD_LOCAL + +static void stbi__de_iphone(stbi__png * z) { + stbi__context * s = z->s; + stbi__uint32 i, pixel_count = s->img_x * s->img_y; + stbi_uc * p = z->out; + + if (s->img_out_n == 3) { // convert bgr to rgb + for (i = 0; i < pixel_count; ++i) { + stbi_uc t = p[0]; + p[0] = p[2]; + p[2] = t; + p += 3; + } + } else { + STBI_ASSERT(s->img_out_n == 4); + if (stbi__unpremultiply_on_load) { + // convert bgr to rgb and unpremultiply + for (i = 0; i < pixel_count; ++i) { + stbi_uc a = p[3]; + stbi_uc t = p[0]; + if (a) { + stbi_uc half = a / 2; + p[0] = (p[2] * 255 + half) / a; + p[1] = (p[1] * 255 + half) / a; + p[2] = (t * 255 + half) / a; + } else { + p[0] = p[2]; + p[2] = t; + } + p += 4; + } + } else { + // convert bgr to rgb + for (i = 0; i < pixel_count; ++i) { + stbi_uc t = p[0]; + p[0] = p[2]; + p[2] = t; + p += 4; + } + } + } +} + +#define STBI__PNG_TYPE(a, b, c, d) (((unsigned)(a) << 24) + ((unsigned)(b) << 16) + ((unsigned)(c) << 8) + (unsigned)(d)) + +static int stbi__parse_png_file(stbi__png * z, int scan, int req_comp) { + stbi_uc palette[1024], pal_img_n = 0; + stbi_uc has_trans = 0, tc[3] = {0}; + stbi__uint16 tc16[3]; + stbi__uint32 ioff = 0, idata_limit = 0, i, pal_len = 0; + int first = 1, k, interlace = 0, color = 0, is_iphone = 0; + stbi__context * s = z->s; + + z->expanded = NULL; + z->idata = NULL; + z->out = NULL; + + if (!stbi__check_png_header(s)) + return 0; + + if (scan == STBI__SCAN_type) + return 1; + + for (;;) { + stbi__pngchunk c = stbi__get_chunk_header(s); + switch (c.type) { + case STBI__PNG_TYPE('C', 'g', 'B', 'I'): + is_iphone = 1; + stbi__skip(s, c.length); + break; + case STBI__PNG_TYPE('I', 'H', 'D', 'R'): { + int comp, filter; + if (!first) + return stbi__err("multiple IHDR", "Corrupt PNG"); + first = 0; + if (c.length != 13) + return stbi__err("bad IHDR len", "Corrupt PNG"); + s->img_x = stbi__get32be(s); + s->img_y = stbi__get32be(s); + if (s->img_y > STBI_MAX_DIMENSIONS) + return stbi__err("too large", "Very large image (corrupt?)"); + if (s->img_x > STBI_MAX_DIMENSIONS) + return stbi__err("too large", "Very large image (corrupt?)"); + z->depth = stbi__get8(s); + if (z->depth != 1 && z->depth != 2 && z->depth != 4 && z->depth != 8 && z->depth != 16) + return stbi__err("1/2/4/8/16-bit only", "PNG not supported: 1/2/4/8/16-bit only"); + color = stbi__get8(s); + if (color > 6) + return stbi__err("bad ctype", "Corrupt PNG"); + if (color == 3 && z->depth == 16) + return stbi__err("bad ctype", "Corrupt PNG"); + if (color == 3) + pal_img_n = 3; + else if (color & 1) + return stbi__err("bad ctype", "Corrupt PNG"); + comp = stbi__get8(s); + if (comp) + return stbi__err("bad comp method", "Corrupt PNG"); + filter = stbi__get8(s); + if (filter) + return stbi__err("bad filter method", "Corrupt PNG"); + interlace = stbi__get8(s); + if (interlace > 1) + return stbi__err("bad interlace method", "Corrupt PNG"); + if (!s->img_x || !s->img_y) + return stbi__err("0-pixel image", "Corrupt PNG"); + if (!pal_img_n) { + s->img_n = (color & 2 ? 3 : 1) + (color & 4 ? 1 : 0); + if ((1 << 30) / s->img_x / s->img_n < s->img_y) + return stbi__err("too large", "Image too large to decode"); + } else { + // if paletted, then pal_n is our final components, and + // img_n is # components to decompress/filter. + s->img_n = 1; + if ((1 << 30) / s->img_x / 4 < s->img_y) + return stbi__err("too large", "Corrupt PNG"); + } + // even with SCAN_header, have to scan to see if we have a tRNS + break; + } + + case STBI__PNG_TYPE('P', 'L', 'T', 'E'): { + if (first) + return stbi__err("first not IHDR", "Corrupt PNG"); + if (c.length > 256 * 3) + return stbi__err("invalid PLTE", "Corrupt PNG"); + pal_len = c.length / 3; + if (pal_len * 3 != c.length) + return stbi__err("invalid PLTE", "Corrupt PNG"); + for (i = 0; i < pal_len; ++i) { + palette[i * 4 + 0] = stbi__get8(s); + palette[i * 4 + 1] = stbi__get8(s); + palette[i * 4 + 2] = stbi__get8(s); + palette[i * 4 + 3] = 255; + } + break; + } + + case STBI__PNG_TYPE('t', 'R', 'N', 'S'): { + if (first) + return stbi__err("first not IHDR", "Corrupt PNG"); + if (z->idata) + return stbi__err("tRNS after IDAT", "Corrupt PNG"); + if (pal_img_n) { + if (scan == STBI__SCAN_header) { + s->img_n = 4; + return 1; + } + if (pal_len == 0) + return stbi__err("tRNS before PLTE", "Corrupt PNG"); + if (c.length > pal_len) + return stbi__err("bad tRNS len", "Corrupt PNG"); + pal_img_n = 4; + for (i = 0; i < c.length; ++i) + palette[i * 4 + 3] = stbi__get8(s); + } else { + if (!(s->img_n & 1)) + return stbi__err("tRNS with alpha", "Corrupt PNG"); + if (c.length != (stbi__uint32)s->img_n * 2) + return stbi__err("bad tRNS len", "Corrupt PNG"); + has_trans = 1; + // non-paletted with tRNS = constant alpha. if header-scanning, we can stop now. + if (scan == STBI__SCAN_header) { + ++s->img_n; + return 1; + } + if (z->depth == 16) { + for (k = 0; k < s->img_n; ++k) + tc16[k] = (stbi__uint16)stbi__get16be(s); // copy the values as-is + } else { + for (k = 0; k < s->img_n; ++k) + tc[k] = (stbi_uc)(stbi__get16be(s) & 255) * + stbi__depth_scale_table[z->depth]; // non 8-bit images will be larger + } + } + break; + } + + case STBI__PNG_TYPE('I', 'D', 'A', 'T'): { + if (first) + return stbi__err("first not IHDR", "Corrupt PNG"); + if (pal_img_n && !pal_len) + return stbi__err("no PLTE", "Corrupt PNG"); + if (scan == STBI__SCAN_header) { + // header scan definitely stops at first IDAT + if (pal_img_n) + s->img_n = pal_img_n; + return 1; + } + if (c.length > (1u << 30)) + return stbi__err("IDAT size limit", "IDAT section larger than 2^30 bytes"); + if ((int)(ioff + c.length) < (int)ioff) + return 0; + if (ioff + c.length > idata_limit) { + stbi__uint32 idata_limit_old = idata_limit; + stbi_uc * p; + if (idata_limit == 0) + idata_limit = c.length > 4096 ? c.length : 4096; + while (ioff + c.length > idata_limit) + idata_limit *= 2; + STBI_NOTUSED(idata_limit_old); + p = (stbi_uc *)STBI_REALLOC_SIZED(z->idata, idata_limit_old, idata_limit); + if (p == NULL) + return stbi__err("outofmem", "Out of memory"); + z->idata = p; + } + if (!stbi__getn(s, z->idata + ioff, c.length)) + return stbi__err("outofdata", "Corrupt PNG"); + ioff += c.length; + break; + } + + case STBI__PNG_TYPE('I', 'E', 'N', 'D'): { + stbi__uint32 raw_len, bpl; + if (first) + return stbi__err("first not IHDR", "Corrupt PNG"); + if (scan != STBI__SCAN_load) + return 1; + if (z->idata == NULL) + return stbi__err("no IDAT", "Corrupt PNG"); + // initial guess for decoded data size to avoid unnecessary reallocs + bpl = (s->img_x * z->depth + 7) / 8; // bytes per line, per component + raw_len = bpl * s->img_y * s->img_n /* pixels */ + s->img_y /* filter mode per row */; + z->expanded = (stbi_uc *)stbi_zlib_decode_malloc_guesssize_headerflag((char *)z->idata, ioff, raw_len, + (int *)&raw_len, !is_iphone); + if (z->expanded == NULL) + return 0; // zlib should set error + STBI_FREE(z->idata); + z->idata = NULL; + if ((req_comp == s->img_n + 1 && req_comp != 3 && !pal_img_n) || has_trans) + s->img_out_n = s->img_n + 1; + else + s->img_out_n = s->img_n; + if (!stbi__create_png_image(z, z->expanded, raw_len, s->img_out_n, z->depth, color, interlace)) + return 0; + if (has_trans) { + if (z->depth == 16) { + if (!stbi__compute_transparency16(z, tc16, s->img_out_n)) + return 0; + } else { + if (!stbi__compute_transparency(z, tc, s->img_out_n)) + return 0; + } + } + if (is_iphone && stbi__de_iphone_flag && s->img_out_n > 2) + stbi__de_iphone(z); + if (pal_img_n) { + // pal_img_n == 3 or 4 + s->img_n = pal_img_n; // record the actual colors we had + s->img_out_n = pal_img_n; + if (req_comp >= 3) + s->img_out_n = req_comp; + if (!stbi__expand_png_palette(z, palette, pal_len, s->img_out_n)) + return 0; + } else if (has_trans) { + // non-paletted image with tRNS -> source image has (constant) alpha + ++s->img_n; + } + STBI_FREE(z->expanded); + z->expanded = NULL; + // end of PNG chunk, read and skip CRC + stbi__get32be(s); + return 1; + } + + default: + // if critical, fail + if (first) + return stbi__err("first not IHDR", "Corrupt PNG"); + if ((c.type & (1 << 29)) == 0) { +#ifndef STBI_NO_FAILURE_STRINGS + // not threadsafe + static char invalid_chunk[] = "XXXX PNG chunk not known"; + invalid_chunk[0] = STBI__BYTECAST(c.type >> 24); + invalid_chunk[1] = STBI__BYTECAST(c.type >> 16); + invalid_chunk[2] = STBI__BYTECAST(c.type >> 8); + invalid_chunk[3] = STBI__BYTECAST(c.type >> 0); +#endif + return stbi__err(invalid_chunk, "PNG not supported: unknown PNG chunk type"); + } + stbi__skip(s, c.length); + break; + } + // end of PNG chunk, read and skip CRC + stbi__get32be(s); + } +} + +static void * stbi__do_png(stbi__png * p, int * x, int * y, int * n, int req_comp, stbi__result_info * ri) { + void * result = NULL; + if (req_comp < 0 || req_comp > 4) + return stbi__errpuc("bad req_comp", "Internal error"); + if (stbi__parse_png_file(p, STBI__SCAN_load, req_comp)) { + if (p->depth <= 8) + ri->bits_per_channel = 8; + else if (p->depth == 16) + ri->bits_per_channel = 16; + else + return stbi__errpuc("bad bits_per_channel", "PNG not supported: unsupported color depth"); + result = p->out; + p->out = NULL; + if (req_comp && req_comp != p->s->img_out_n) { + if (ri->bits_per_channel == 8) + result = stbi__convert_format((unsigned char *)result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y); + else + result = stbi__convert_format16((stbi__uint16 *)result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y); + p->s->img_out_n = req_comp; + if (result == NULL) + return result; + } + *x = p->s->img_x; + *y = p->s->img_y; + if (n) + *n = p->s->img_n; + } + STBI_FREE(p->out); + p->out = NULL; + STBI_FREE(p->expanded); + p->expanded = NULL; + STBI_FREE(p->idata); + p->idata = NULL; + + return result; +} + +static void * stbi__png_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri) { + stbi__png p; + p.s = s; + return stbi__do_png(&p, x, y, comp, req_comp, ri); +} + +static int stbi__png_test(stbi__context * s) { + int r; + r = stbi__check_png_header(s); + stbi__rewind(s); + return r; +} + +static int stbi__png_info_raw(stbi__png * p, int * x, int * y, int * comp) { + if (!stbi__parse_png_file(p, STBI__SCAN_header, 0)) { + stbi__rewind(p->s); + return 0; + } + if (x) + *x = p->s->img_x; + if (y) + *y = p->s->img_y; + if (comp) + *comp = p->s->img_n; + return 1; +} + +static int stbi__png_info(stbi__context * s, int * x, int * y, int * comp) { + stbi__png p; + p.s = s; + return stbi__png_info_raw(&p, x, y, comp); +} + +static int stbi__png_is16(stbi__context * s) { + stbi__png p; + p.s = s; + if (!stbi__png_info_raw(&p, NULL, NULL, NULL)) + return 0; + if (p.depth != 16) { + stbi__rewind(p.s); + return 0; + } + return 1; +} +#endif + +// Microsoft/Windows BMP image + +#ifndef STBI_NO_BMP +static int stbi__bmp_test_raw(stbi__context * s) { + int r; + int sz; + if (stbi__get8(s) != 'B') + return 0; + if (stbi__get8(s) != 'M') + return 0; + stbi__get32le(s); // discard filesize + stbi__get16le(s); // discard reserved + stbi__get16le(s); // discard reserved + stbi__get32le(s); // discard data offset + sz = stbi__get32le(s); + r = (sz == 12 || sz == 40 || sz == 56 || sz == 108 || sz == 124); + return r; +} + +static int stbi__bmp_test(stbi__context * s) { + int r = stbi__bmp_test_raw(s); + stbi__rewind(s); + return r; +} + +// returns 0..31 for the highest set bit +static int stbi__high_bit(unsigned int z) { + int n = 0; + if (z == 0) + return -1; + if (z >= 0x10000) { + n += 16; + z >>= 16; + } + if (z >= 0x00100) { + n += 8; + z >>= 8; + } + if (z >= 0x00010) { + n += 4; + z >>= 4; + } + if (z >= 0x00004) { + n += 2; + z >>= 2; + } + if (z >= 0x00002) { + n += 1; /* >>= 1;*/ + } + return n; +} + +static int stbi__bitcount(unsigned int a) { + a = (a & 0x55555555) + ((a >> 1) & 0x55555555); // max 2 + a = (a & 0x33333333) + ((a >> 2) & 0x33333333); // max 4 + a = (a + (a >> 4)) & 0x0f0f0f0f; // max 8 per 4, now 8 bits + a = (a + (a >> 8)); // max 16 per 8 bits + a = (a + (a >> 16)); // max 32 per 8 bits + return a & 0xff; +} + +// extract an arbitrarily-aligned N-bit value (N=bits) +// from v, and then make it 8-bits long and fractionally +// extend it to full full range. +static int stbi__shiftsigned(unsigned int v, int shift, int bits) { + static unsigned int mul_table[9] = { + 0, + 0xff /*0b11111111*/, + 0x55 /*0b01010101*/, + 0x49 /*0b01001001*/, + 0x11 /*0b00010001*/, + 0x21 /*0b00100001*/, + 0x41 /*0b01000001*/, + 0x81 /*0b10000001*/, + 0x01 /*0b00000001*/, + }; + static unsigned int shift_table[9] = { + 0, 0, 0, 1, 0, 2, 4, 6, 0, + }; + if (shift < 0) + v <<= -shift; + else + v >>= shift; + STBI_ASSERT(v < 256); + v >>= (8 - bits); + STBI_ASSERT(bits >= 0 && bits <= 8); + return (int)((unsigned)v * mul_table[bits]) >> shift_table[bits]; +} + +typedef struct { + int bpp, offset, hsz; + unsigned int mr, mg, mb, ma, all_a; + int extra_read; +} stbi__bmp_data; + +static int stbi__bmp_set_mask_defaults(stbi__bmp_data * info, int compress) { + // BI_BITFIELDS specifies masks explicitly, don't override + if (compress == 3) + return 1; + + if (compress == 0) { + if (info->bpp == 16) { + info->mr = 31u << 10; + info->mg = 31u << 5; + info->mb = 31u << 0; + } else if (info->bpp == 32) { + info->mr = 0xffu << 16; + info->mg = 0xffu << 8; + info->mb = 0xffu << 0; + info->ma = 0xffu << 24; + info->all_a = 0; // if all_a is 0 at end, then we loaded alpha channel but it was all 0 + } else { + // otherwise, use defaults, which is all-0 + info->mr = info->mg = info->mb = info->ma = 0; + } + return 1; + } + return 0; // error +} + +static void * stbi__bmp_parse_header(stbi__context * s, stbi__bmp_data * info) { + int hsz; + if (stbi__get8(s) != 'B' || stbi__get8(s) != 'M') + return stbi__errpuc("not BMP", "Corrupt BMP"); + stbi__get32le(s); // discard filesize + stbi__get16le(s); // discard reserved + stbi__get16le(s); // discard reserved + info->offset = stbi__get32le(s); + info->hsz = hsz = stbi__get32le(s); + info->mr = info->mg = info->mb = info->ma = 0; + info->extra_read = 14; + + if (info->offset < 0) + return stbi__errpuc("bad BMP", "bad BMP"); + + if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124) + return stbi__errpuc("unknown BMP", "BMP type not supported: unknown"); + if (hsz == 12) { + s->img_x = stbi__get16le(s); + s->img_y = stbi__get16le(s); + } else { + s->img_x = stbi__get32le(s); + s->img_y = stbi__get32le(s); + } + if (stbi__get16le(s) != 1) + return stbi__errpuc("bad BMP", "bad BMP"); + info->bpp = stbi__get16le(s); + if (hsz != 12) { + int compress = stbi__get32le(s); + if (compress == 1 || compress == 2) + return stbi__errpuc("BMP RLE", "BMP type not supported: RLE"); + if (compress >= 4) + return stbi__errpuc("BMP JPEG/PNG", + "BMP type not supported: unsupported compression"); // this includes PNG/JPEG modes + if (compress == 3 && info->bpp != 16 && info->bpp != 32) + return stbi__errpuc("bad BMP", "bad BMP"); // bitfields requires 16 or 32 bits/pixel + stbi__get32le(s); // discard sizeof + stbi__get32le(s); // discard hres + stbi__get32le(s); // discard vres + stbi__get32le(s); // discard colorsused + stbi__get32le(s); // discard max important + if (hsz == 40 || hsz == 56) { + if (hsz == 56) { + stbi__get32le(s); + stbi__get32le(s); + stbi__get32le(s); + stbi__get32le(s); + } + if (info->bpp == 16 || info->bpp == 32) { + if (compress == 0) { + stbi__bmp_set_mask_defaults(info, compress); + } else if (compress == 3) { + info->mr = stbi__get32le(s); + info->mg = stbi__get32le(s); + info->mb = stbi__get32le(s); + info->extra_read += 12; + // not documented, but generated by photoshop and handled by mspaint + if (info->mr == info->mg && info->mg == info->mb) { + // ?!?!? + return stbi__errpuc("bad BMP", "bad BMP"); + } + } else + return stbi__errpuc("bad BMP", "bad BMP"); + } + } else { + // V4/V5 header + int i; + if (hsz != 108 && hsz != 124) + return stbi__errpuc("bad BMP", "bad BMP"); + info->mr = stbi__get32le(s); + info->mg = stbi__get32le(s); + info->mb = stbi__get32le(s); + info->ma = stbi__get32le(s); + if (compress != 3) // override mr/mg/mb unless in BI_BITFIELDS mode, as per docs + stbi__bmp_set_mask_defaults(info, compress); + stbi__get32le(s); // discard color space + for (i = 0; i < 12; ++i) + stbi__get32le(s); // discard color space parameters + if (hsz == 124) { + stbi__get32le(s); // discard rendering intent + stbi__get32le(s); // discard offset of profile data + stbi__get32le(s); // discard size of profile data + stbi__get32le(s); // discard reserved + } + } + } + return (void *)1; +} + +static void * stbi__bmp_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri) { + stbi_uc * out; + unsigned int mr = 0, mg = 0, mb = 0, ma = 0, all_a; + stbi_uc pal[256][4]; + int psize = 0, i, j, width; + int flip_vertically, pad, target; + stbi__bmp_data info; + STBI_NOTUSED(ri); + + info.all_a = 255; + if (stbi__bmp_parse_header(s, &info) == NULL) + return NULL; // error code already set + + flip_vertically = ((int)s->img_y) > 0; + s->img_y = abs((int)s->img_y); + + if (s->img_y > STBI_MAX_DIMENSIONS) + return stbi__errpuc("too large", "Very large image (corrupt?)"); + if (s->img_x > STBI_MAX_DIMENSIONS) + return stbi__errpuc("too large", "Very large image (corrupt?)"); + + mr = info.mr; + mg = info.mg; + mb = info.mb; + ma = info.ma; + all_a = info.all_a; + + if (info.hsz == 12) { + if (info.bpp < 24) + psize = (info.offset - info.extra_read - 24) / 3; + } else { + if (info.bpp < 16) + psize = (info.offset - info.extra_read - info.hsz) >> 2; + } + if (psize == 0) { + // accept some number of extra bytes after the header, but if the offset points either to before + // the header ends or implies a large amount of extra data, reject the file as malformed + int bytes_read_so_far = s->callback_already_read + (int)(s->img_buffer - s->img_buffer_original); + int header_limit = 1024; // max we actually read is below 256 bytes currently. + int extra_data_limit = 256 * 4; // what ordinarily goes here is a palette; 256 entries*4 bytes is its max size. + if (bytes_read_so_far <= 0 || bytes_read_so_far > header_limit) { + return stbi__errpuc("bad header", "Corrupt BMP"); + } + // we established that bytes_read_so_far is positive and sensible. + // the first half of this test rejects offsets that are either too small positives, or + // negative, and guarantees that info.offset >= bytes_read_so_far > 0. this in turn + // ensures the number computed in the second half of the test can't overflow. + if (info.offset < bytes_read_so_far || info.offset - bytes_read_so_far > extra_data_limit) { + return stbi__errpuc("bad offset", "Corrupt BMP"); + } else { + stbi__skip(s, info.offset - bytes_read_so_far); + } + } + + if (info.bpp == 24 && ma == 0xff000000) + s->img_n = 3; + else + s->img_n = ma ? 4 : 3; + if (req_comp && req_comp >= 3) // we can directly decode 3 or 4 + target = req_comp; + else + target = s->img_n; // if they want monochrome, we'll post-convert + + // sanity-check size + if (!stbi__mad3sizes_valid(target, s->img_x, s->img_y, 0)) + return stbi__errpuc("too large", "Corrupt BMP"); + + out = (stbi_uc *)stbi__malloc_mad3(target, s->img_x, s->img_y, 0); + if (!out) + return stbi__errpuc("outofmem", "Out of memory"); + if (info.bpp < 16) { + int z = 0; + if (psize == 0 || psize > 256) { + STBI_FREE(out); + return stbi__errpuc("invalid", "Corrupt BMP"); + } + for (i = 0; i < psize; ++i) { + pal[i][2] = stbi__get8(s); + pal[i][1] = stbi__get8(s); + pal[i][0] = stbi__get8(s); + if (info.hsz != 12) + stbi__get8(s); + pal[i][3] = 255; + } + stbi__skip(s, info.offset - info.extra_read - info.hsz - psize * (info.hsz == 12 ? 3 : 4)); + if (info.bpp == 1) + width = (s->img_x + 7) >> 3; + else if (info.bpp == 4) + width = (s->img_x + 1) >> 1; + else if (info.bpp == 8) + width = s->img_x; + else { + STBI_FREE(out); + return stbi__errpuc("bad bpp", "Corrupt BMP"); + } + pad = (-width) & 3; + if (info.bpp == 1) { + for (j = 0; j < (int)s->img_y; ++j) { + int bit_offset = 7, v = stbi__get8(s); + for (i = 0; i < (int)s->img_x; ++i) { + int color = (v >> bit_offset) & 0x1; + out[z++] = pal[color][0]; + out[z++] = pal[color][1]; + out[z++] = pal[color][2]; + if (target == 4) + out[z++] = 255; + if (i + 1 == (int)s->img_x) + break; + if ((--bit_offset) < 0) { + bit_offset = 7; + v = stbi__get8(s); + } + } + stbi__skip(s, pad); + } + } else { + for (j = 0; j < (int)s->img_y; ++j) { + for (i = 0; i < (int)s->img_x; i += 2) { + int v = stbi__get8(s), v2 = 0; + if (info.bpp == 4) { + v2 = v & 15; + v >>= 4; + } + out[z++] = pal[v][0]; + out[z++] = pal[v][1]; + out[z++] = pal[v][2]; + if (target == 4) + out[z++] = 255; + if (i + 1 == (int)s->img_x) + break; + v = (info.bpp == 8) ? stbi__get8(s) : v2; + out[z++] = pal[v][0]; + out[z++] = pal[v][1]; + out[z++] = pal[v][2]; + if (target == 4) + out[z++] = 255; + } + stbi__skip(s, pad); + } + } + } else { + int rshift = 0, gshift = 0, bshift = 0, ashift = 0, rcount = 0, gcount = 0, bcount = 0, acount = 0; + int z = 0; + int easy = 0; + stbi__skip(s, info.offset - info.extra_read - info.hsz); + if (info.bpp == 24) + width = 3 * s->img_x; + else if (info.bpp == 16) + width = 2 * s->img_x; + else /* bpp = 32 and pad = 0 */ + width = 0; + pad = (-width) & 3; + if (info.bpp == 24) { + easy = 1; + } else if (info.bpp == 32) { + if (mb == 0xff && mg == 0xff00 && mr == 0x00ff0000 && ma == 0xff000000) + easy = 2; + } + if (!easy) { + if (!mr || !mg || !mb) { + STBI_FREE(out); + return stbi__errpuc("bad masks", "Corrupt BMP"); + } + // right shift amt to put high bit in position #7 + rshift = stbi__high_bit(mr) - 7; + rcount = stbi__bitcount(mr); + gshift = stbi__high_bit(mg) - 7; + gcount = stbi__bitcount(mg); + bshift = stbi__high_bit(mb) - 7; + bcount = stbi__bitcount(mb); + ashift = stbi__high_bit(ma) - 7; + acount = stbi__bitcount(ma); + if (rcount > 8 || gcount > 8 || bcount > 8 || acount > 8) { + STBI_FREE(out); + return stbi__errpuc("bad masks", "Corrupt BMP"); + } + } + for (j = 0; j < (int)s->img_y; ++j) { + if (easy) { + for (i = 0; i < (int)s->img_x; ++i) { + unsigned char a; + out[z + 2] = stbi__get8(s); + out[z + 1] = stbi__get8(s); + out[z + 0] = stbi__get8(s); + z += 3; + a = (easy == 2 ? stbi__get8(s) : 255); + all_a |= a; + if (target == 4) + out[z++] = a; + } + } else { + int bpp = info.bpp; + for (i = 0; i < (int)s->img_x; ++i) { + stbi__uint32 v = (bpp == 16 ? (stbi__uint32)stbi__get16le(s) : stbi__get32le(s)); + unsigned int a; + out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mr, rshift, rcount)); + out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mg, gshift, gcount)); + out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mb, bshift, bcount)); + a = (ma ? stbi__shiftsigned(v & ma, ashift, acount) : 255); + all_a |= a; + if (target == 4) + out[z++] = STBI__BYTECAST(a); + } + } + stbi__skip(s, pad); + } + } + + // if alpha channel is all 0s, replace with all 255s + if (target == 4 && all_a == 0) + for (i = 4 * s->img_x * s->img_y - 1; i >= 0; i -= 4) + out[i] = 255; + + if (flip_vertically) { + stbi_uc t; + for (j = 0; j < (int)s->img_y >> 1; ++j) { + stbi_uc * p1 = out + j * s->img_x * target; + stbi_uc * p2 = out + (s->img_y - 1 - j) * s->img_x * target; + for (i = 0; i < (int)s->img_x * target; ++i) { + t = p1[i]; + p1[i] = p2[i]; + p2[i] = t; + } + } + } + + if (req_comp && req_comp != target) { + out = stbi__convert_format(out, target, req_comp, s->img_x, s->img_y); + if (out == NULL) + return out; // stbi__convert_format frees input on failure + } + + *x = s->img_x; + *y = s->img_y; + if (comp) + *comp = s->img_n; + return out; +} +#endif + +// Targa Truevision - TGA +// by Jonathan Dummer +#ifndef STBI_NO_TGA +// returns STBI_rgb or whatever, 0 on error +static int stbi__tga_get_comp(int bits_per_pixel, int is_grey, int * is_rgb16) { + // only RGB or RGBA (incl. 16bit) or grey allowed + if (is_rgb16) + *is_rgb16 = 0; + switch (bits_per_pixel) { + case 8: + return STBI_grey; + case 16: + if (is_grey) + return STBI_grey_alpha; + // fallthrough + case 15: + if (is_rgb16) + *is_rgb16 = 1; + return STBI_rgb; + case 24: // fallthrough + case 32: + return bits_per_pixel / 8; + default: + return 0; + } +} + +static int stbi__tga_info(stbi__context * s, int * x, int * y, int * comp) { + int tga_w, tga_h, tga_comp, tga_image_type, tga_bits_per_pixel, tga_colormap_bpp; + int sz, tga_colormap_type; + stbi__get8(s); // discard Offset + tga_colormap_type = stbi__get8(s); // colormap type + if (tga_colormap_type > 1) { + stbi__rewind(s); + return 0; // only RGB or indexed allowed + } + tga_image_type = stbi__get8(s); // image type + if (tga_colormap_type == 1) { // colormapped (paletted) image + if (tga_image_type != 1 && tga_image_type != 9) { + stbi__rewind(s); + return 0; + } + stbi__skip(s, 4); // skip index of first colormap entry and number of entries + sz = stbi__get8(s); // check bits per palette color entry + if ((sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32)) { + stbi__rewind(s); + return 0; + } + stbi__skip(s, 4); // skip image x and y origin + tga_colormap_bpp = sz; + } else { // "normal" image w/o colormap - only RGB or grey allowed, +/- RLE + if ((tga_image_type != 2) && (tga_image_type != 3) && (tga_image_type != 10) && (tga_image_type != 11)) { + stbi__rewind(s); + return 0; // only RGB or grey allowed, +/- RLE + } + stbi__skip(s, 9); // skip colormap specification and image x/y origin + tga_colormap_bpp = 0; + } + tga_w = stbi__get16le(s); + if (tga_w < 1) { + stbi__rewind(s); + return 0; // test width + } + tga_h = stbi__get16le(s); + if (tga_h < 1) { + stbi__rewind(s); + return 0; // test height + } + tga_bits_per_pixel = stbi__get8(s); // bits per pixel + stbi__get8(s); // ignore alpha bits + if (tga_colormap_bpp != 0) { + if ((tga_bits_per_pixel != 8) && (tga_bits_per_pixel != 16)) { + // when using a colormap, tga_bits_per_pixel is the size of the indexes + // I don't think anything but 8 or 16bit indexes makes sense + stbi__rewind(s); + return 0; + } + tga_comp = stbi__tga_get_comp(tga_colormap_bpp, 0, NULL); + } else { + tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3) || (tga_image_type == 11), NULL); + } + if (!tga_comp) { + stbi__rewind(s); + return 0; + } + if (x) + *x = tga_w; + if (y) + *y = tga_h; + if (comp) + *comp = tga_comp; + return 1; // seems to have passed everything +} + +static int stbi__tga_test(stbi__context * s) { + int res = 0; + int sz, tga_color_type; + stbi__get8(s); // discard Offset + tga_color_type = stbi__get8(s); // color type + if (tga_color_type > 1) + goto errorEnd; // only RGB or indexed allowed + sz = stbi__get8(s); // image type + if (tga_color_type == 1) { // colormapped (paletted) image + if (sz != 1 && sz != 9) + goto errorEnd; // colortype 1 demands image type 1 or 9 + stbi__skip(s, 4); // skip index of first colormap entry and number of entries + sz = stbi__get8(s); // check bits per palette color entry + if ((sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32)) + goto errorEnd; + stbi__skip(s, 4); // skip image x and y origin + } else { // "normal" image w/o colormap + if ((sz != 2) && (sz != 3) && (sz != 10) && (sz != 11)) + goto errorEnd; // only RGB or grey allowed, +/- RLE + stbi__skip(s, 9); // skip colormap specification and image x/y origin + } + if (stbi__get16le(s) < 1) + goto errorEnd; // test width + if (stbi__get16le(s) < 1) + goto errorEnd; // test height + sz = stbi__get8(s); // bits per pixel + if ((tga_color_type == 1) && (sz != 8) && (sz != 16)) + goto errorEnd; // for colormapped images, bpp is size of an index + if ((sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32)) + goto errorEnd; + + res = 1; // if we got this far, everything's good and we can return 1 instead of 0 + +errorEnd: + stbi__rewind(s); + return res; +} + +// read 16bit value and convert to 24bit RGB +static void stbi__tga_read_rgb16(stbi__context * s, stbi_uc * out) { + stbi__uint16 px = (stbi__uint16)stbi__get16le(s); + stbi__uint16 fiveBitMask = 31; + // we have 3 channels with 5bits each + int r = (px >> 10) & fiveBitMask; + int g = (px >> 5) & fiveBitMask; + int b = px & fiveBitMask; + // Note that this saves the data in RGB(A) order, so it doesn't need to be swapped later + out[0] = (stbi_uc)((r * 255) / 31); + out[1] = (stbi_uc)((g * 255) / 31); + out[2] = (stbi_uc)((b * 255) / 31); + + // some people claim that the most significant bit might be used for alpha + // (possibly if an alpha-bit is set in the "image descriptor byte") + // but that only made 16bit test images completely translucent.. + // so let's treat all 15 and 16bit TGAs as RGB with no alpha. +} + +static void * stbi__tga_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri) { + // read in the TGA header stuff + int tga_offset = stbi__get8(s); + int tga_indexed = stbi__get8(s); + int tga_image_type = stbi__get8(s); + int tga_is_RLE = 0; + int tga_palette_start = stbi__get16le(s); + int tga_palette_len = stbi__get16le(s); + int tga_palette_bits = stbi__get8(s); + int tga_x_origin = stbi__get16le(s); + int tga_y_origin = stbi__get16le(s); + int tga_width = stbi__get16le(s); + int tga_height = stbi__get16le(s); + int tga_bits_per_pixel = stbi__get8(s); + int tga_comp, tga_rgb16 = 0; + int tga_inverted = stbi__get8(s); + // int tga_alpha_bits = tga_inverted & 15; // the 4 lowest bits - unused (useless?) + // image data + unsigned char * tga_data; + unsigned char * tga_palette = NULL; + int i, j; + unsigned char raw_data[4] = {0}; + int RLE_count = 0; + int RLE_repeating = 0; + int read_next_pixel = 1; + STBI_NOTUSED(ri); + STBI_NOTUSED(tga_x_origin); // @TODO + STBI_NOTUSED(tga_y_origin); // @TODO + + if (tga_height > STBI_MAX_DIMENSIONS) + return stbi__errpuc("too large", "Very large image (corrupt?)"); + if (tga_width > STBI_MAX_DIMENSIONS) + return stbi__errpuc("too large", "Very large image (corrupt?)"); + + // do a tiny bit of precessing + if (tga_image_type >= 8) { + tga_image_type -= 8; + tga_is_RLE = 1; + } + tga_inverted = 1 - ((tga_inverted >> 5) & 1); + + // If I'm paletted, then I'll use the number of bits from the palette + if (tga_indexed) + tga_comp = stbi__tga_get_comp(tga_palette_bits, 0, &tga_rgb16); + else + tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3), &tga_rgb16); + + if (!tga_comp) // shouldn't really happen, stbi__tga_test() should have ensured basic consistency + return stbi__errpuc("bad format", "Can't find out TGA pixelformat"); + + // tga info + *x = tga_width; + *y = tga_height; + if (comp) + *comp = tga_comp; + + if (!stbi__mad3sizes_valid(tga_width, tga_height, tga_comp, 0)) + return stbi__errpuc("too large", "Corrupt TGA"); + + tga_data = (unsigned char *)stbi__malloc_mad3(tga_width, tga_height, tga_comp, 0); + if (!tga_data) + return stbi__errpuc("outofmem", "Out of memory"); + + // skip to the data's starting position (offset usually = 0) + stbi__skip(s, tga_offset); + + if (!tga_indexed && !tga_is_RLE && !tga_rgb16) { + for (i = 0; i < tga_height; ++i) { + int row = tga_inverted ? tga_height - i - 1 : i; + stbi_uc * tga_row = tga_data + row * tga_width * tga_comp; + stbi__getn(s, tga_row, tga_width * tga_comp); + } + } else { + // do I need to load a palette? + if (tga_indexed) { + if (tga_palette_len == 0) { /* you have to have at least one entry! */ + STBI_FREE(tga_data); + return stbi__errpuc("bad palette", "Corrupt TGA"); + } + + // any data to skip? (offset usually = 0) + stbi__skip(s, tga_palette_start); + // load the palette + tga_palette = (unsigned char *)stbi__malloc_mad2(tga_palette_len, tga_comp, 0); + if (!tga_palette) { + STBI_FREE(tga_data); + return stbi__errpuc("outofmem", "Out of memory"); + } + if (tga_rgb16) { + stbi_uc * pal_entry = tga_palette; + STBI_ASSERT(tga_comp == STBI_rgb); + for (i = 0; i < tga_palette_len; ++i) { + stbi__tga_read_rgb16(s, pal_entry); + pal_entry += tga_comp; + } + } else if (!stbi__getn(s, tga_palette, tga_palette_len * tga_comp)) { + STBI_FREE(tga_data); + STBI_FREE(tga_palette); + return stbi__errpuc("bad palette", "Corrupt TGA"); + } + } + // load the data + for (i = 0; i < tga_width * tga_height; ++i) { + // if I'm in RLE mode, do I need to get a RLE stbi__pngchunk? + if (tga_is_RLE) { + if (RLE_count == 0) { + // yep, get the next byte as a RLE command + int RLE_cmd = stbi__get8(s); + RLE_count = 1 + (RLE_cmd & 127); + RLE_repeating = RLE_cmd >> 7; + read_next_pixel = 1; + } else if (!RLE_repeating) { + read_next_pixel = 1; + } + } else { + read_next_pixel = 1; + } + // OK, if I need to read a pixel, do it now + if (read_next_pixel) { + // load however much data we did have + if (tga_indexed) { + // read in index, then perform the lookup + int pal_idx = (tga_bits_per_pixel == 8) ? stbi__get8(s) : stbi__get16le(s); + if (pal_idx >= tga_palette_len) { + // invalid index + pal_idx = 0; + } + pal_idx *= tga_comp; + for (j = 0; j < tga_comp; ++j) { + raw_data[j] = tga_palette[pal_idx + j]; + } + } else if (tga_rgb16) { + STBI_ASSERT(tga_comp == STBI_rgb); + stbi__tga_read_rgb16(s, raw_data); + } else { + // read in the data raw + for (j = 0; j < tga_comp; ++j) { + raw_data[j] = stbi__get8(s); + } + } + // clear the reading flag for the next pixel + read_next_pixel = 0; + } // end of reading a pixel + + // copy data + for (j = 0; j < tga_comp; ++j) + tga_data[i * tga_comp + j] = raw_data[j]; + + // in case we're in RLE mode, keep counting down + --RLE_count; + } + // do I need to invert the image? + if (tga_inverted) { + for (j = 0; j * 2 < tga_height; ++j) { + int index1 = j * tga_width * tga_comp; + int index2 = (tga_height - 1 - j) * tga_width * tga_comp; + for (i = tga_width * tga_comp; i > 0; --i) { + unsigned char temp = tga_data[index1]; + tga_data[index1] = tga_data[index2]; + tga_data[index2] = temp; + ++index1; + ++index2; + } + } + } + // clear my palette, if I had one + if (tga_palette != NULL) { + STBI_FREE(tga_palette); + } + } + + // swap RGB - if the source data was RGB16, it already is in the right order + if (tga_comp >= 3 && !tga_rgb16) { + unsigned char * tga_pixel = tga_data; + for (i = 0; i < tga_width * tga_height; ++i) { + unsigned char temp = tga_pixel[0]; + tga_pixel[0] = tga_pixel[2]; + tga_pixel[2] = temp; + tga_pixel += tga_comp; + } + } + + // convert to target component count + if (req_comp && req_comp != tga_comp) + tga_data = stbi__convert_format(tga_data, tga_comp, req_comp, tga_width, tga_height); + + // the things I do to get rid of an error message, and yet keep + // Microsoft's C compilers happy... [8^( + tga_palette_start = tga_palette_len = tga_palette_bits = tga_x_origin = tga_y_origin = 0; + STBI_NOTUSED(tga_palette_start); + // OK, done + return tga_data; +} +#endif + +// ************************************************************************************************* +// Photoshop PSD loader -- PD by Thatcher Ulrich, integration by Nicolas Schulz, tweaked by STB + +#ifndef STBI_NO_PSD +static int stbi__psd_test(stbi__context * s) { + int r = (stbi__get32be(s) == 0x38425053); + stbi__rewind(s); + return r; +} + +static int stbi__psd_decode_rle(stbi__context * s, stbi_uc * p, int pixelCount) { + int count, nleft, len; + + count = 0; + while ((nleft = pixelCount - count) > 0) { + len = stbi__get8(s); + if (len == 128) { + // No-op. + } else if (len < 128) { + // Copy next len+1 bytes literally. + len++; + if (len > nleft) + return 0; // corrupt data + count += len; + while (len) { + *p = stbi__get8(s); + p += 4; + len--; + } + } else if (len > 128) { + stbi_uc val; + // Next -len+1 bytes in the dest are replicated from next source byte. + // (Interpret len as a negative 8-bit int.) + len = 257 - len; + if (len > nleft) + return 0; // corrupt data + val = stbi__get8(s); + count += len; + while (len) { + *p = val; + p += 4; + len--; + } + } + } + + return 1; +} + +static void * stbi__psd_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri, int bpc) { + int pixelCount; + int channelCount, compression; + int channel, i; + int bitdepth; + int w, h; + stbi_uc * out; + STBI_NOTUSED(ri); + + // Check identifier + if (stbi__get32be(s) != 0x38425053) // "8BPS" + return stbi__errpuc("not PSD", "Corrupt PSD image"); + + // Check file type version. + if (stbi__get16be(s) != 1) + return stbi__errpuc("wrong version", "Unsupported version of PSD image"); + + // Skip 6 reserved bytes. + stbi__skip(s, 6); + + // Read the number of channels (R, G, B, A, etc). + channelCount = stbi__get16be(s); + if (channelCount < 0 || channelCount > 16) + return stbi__errpuc("wrong channel count", "Unsupported number of channels in PSD image"); + + // Read the rows and columns of the image. + h = stbi__get32be(s); + w = stbi__get32be(s); + + if (h > STBI_MAX_DIMENSIONS) + return stbi__errpuc("too large", "Very large image (corrupt?)"); + if (w > STBI_MAX_DIMENSIONS) + return stbi__errpuc("too large", "Very large image (corrupt?)"); + + // Make sure the depth is 8 bits. + bitdepth = stbi__get16be(s); + if (bitdepth != 8 && bitdepth != 16) + return stbi__errpuc("unsupported bit depth", "PSD bit depth is not 8 or 16 bit"); + + // Make sure the color mode is RGB. + // Valid options are: + // 0: Bitmap + // 1: Grayscale + // 2: Indexed color + // 3: RGB color + // 4: CMYK color + // 7: Multichannel + // 8: Duotone + // 9: Lab color + if (stbi__get16be(s) != 3) + return stbi__errpuc("wrong color format", "PSD is not in RGB color format"); + + // Skip the Mode Data. (It's the palette for indexed color; other info for other modes.) + stbi__skip(s, stbi__get32be(s)); + + // Skip the image resources. (resolution, pen tool paths, etc) + stbi__skip(s, stbi__get32be(s)); + + // Skip the reserved data. + stbi__skip(s, stbi__get32be(s)); + + // Find out if the data is compressed. + // Known values: + // 0: no compression + // 1: RLE compressed + compression = stbi__get16be(s); + if (compression > 1) + return stbi__errpuc("bad compression", "PSD has an unknown compression format"); + + // Check size + if (!stbi__mad3sizes_valid(4, w, h, 0)) + return stbi__errpuc("too large", "Corrupt PSD"); + + // Create the destination image. + + if (!compression && bitdepth == 16 && bpc == 16) { + out = (stbi_uc *)stbi__malloc_mad3(8, w, h, 0); + ri->bits_per_channel = 16; + } else + out = (stbi_uc *)stbi__malloc(4 * w * h); + + if (!out) + return stbi__errpuc("outofmem", "Out of memory"); + pixelCount = w * h; + + // Initialize the data to zero. + // memset( out, 0, pixelCount * 4 ); + + // Finally, the image data. + if (compression) { + // RLE as used by .PSD and .TIFF + // Loop until you get the number of unpacked bytes you are expecting: + // Read the next source byte into n. + // If n is between 0 and 127 inclusive, copy the next n+1 bytes literally. + // Else if n is between -127 and -1 inclusive, copy the next byte -n+1 times. + // Else if n is 128, noop. + // Endloop + + // The RLE-compressed data is preceded by a 2-byte data count for each row in the data, + // which we're going to just skip. + stbi__skip(s, h * channelCount * 2); + + // Read the RLE data by channel. + for (channel = 0; channel < 4; channel++) { + stbi_uc * p; + + p = out + channel; + if (channel >= channelCount) { + // Fill this channel with default data. + for (i = 0; i < pixelCount; i++, p += 4) + *p = (channel == 3 ? 255 : 0); + } else { + // Read the RLE data. + if (!stbi__psd_decode_rle(s, p, pixelCount)) { + STBI_FREE(out); + return stbi__errpuc("corrupt", "bad RLE data"); + } + } + } + } else { + // We're at the raw image data. It's each channel in order (Red, Green, Blue, Alpha, ...) + // where each channel consists of an 8-bit (or 16-bit) value for each pixel in the image. + + // Read the data by channel. + for (channel = 0; channel < 4; channel++) { + if (channel >= channelCount) { + // Fill this channel with default data. + if (bitdepth == 16 && bpc == 16) { + stbi__uint16 * q = ((stbi__uint16 *)out) + channel; + stbi__uint16 val = channel == 3 ? 65535 : 0; + for (i = 0; i < pixelCount; i++, q += 4) + *q = val; + } else { + stbi_uc * p = out + channel; + stbi_uc val = channel == 3 ? 255 : 0; + for (i = 0; i < pixelCount; i++, p += 4) + *p = val; + } + } else { + if (ri->bits_per_channel == 16) { // output bpc + stbi__uint16 * q = ((stbi__uint16 *)out) + channel; + for (i = 0; i < pixelCount; i++, q += 4) + *q = (stbi__uint16)stbi__get16be(s); + } else { + stbi_uc * p = out + channel; + if (bitdepth == 16) { // input bpc + for (i = 0; i < pixelCount; i++, p += 4) + *p = (stbi_uc)(stbi__get16be(s) >> 8); + } else { + for (i = 0; i < pixelCount; i++, p += 4) + *p = stbi__get8(s); + } + } + } + } + } + + // remove weird white matte from PSD + if (channelCount >= 4) { + if (ri->bits_per_channel == 16) { + for (i = 0; i < w * h; ++i) { + stbi__uint16 * pixel = (stbi__uint16 *)out + 4 * i; + if (pixel[3] != 0 && pixel[3] != 65535) { + float a = pixel[3] / 65535.0f; + float ra = 1.0f / a; + float inv_a = 65535.0f * (1 - ra); + pixel[0] = (stbi__uint16)(pixel[0] * ra + inv_a); + pixel[1] = (stbi__uint16)(pixel[1] * ra + inv_a); + pixel[2] = (stbi__uint16)(pixel[2] * ra + inv_a); + } + } + } else { + for (i = 0; i < w * h; ++i) { + unsigned char * pixel = out + 4 * i; + if (pixel[3] != 0 && pixel[3] != 255) { + float a = pixel[3] / 255.0f; + float ra = 1.0f / a; + float inv_a = 255.0f * (1 - ra); + pixel[0] = (unsigned char)(pixel[0] * ra + inv_a); + pixel[1] = (unsigned char)(pixel[1] * ra + inv_a); + pixel[2] = (unsigned char)(pixel[2] * ra + inv_a); + } + } + } + } + + // convert to desired output format + if (req_comp && req_comp != 4) { + if (ri->bits_per_channel == 16) + out = (stbi_uc *)stbi__convert_format16((stbi__uint16 *)out, 4, req_comp, w, h); + else + out = stbi__convert_format(out, 4, req_comp, w, h); + if (out == NULL) + return out; // stbi__convert_format frees input on failure + } + + if (comp) + *comp = 4; + *y = h; + *x = w; + + return out; +} +#endif + +// ************************************************************************************************* +// Softimage PIC loader +// by Tom Seddon +// +// See http://softimage.wiki.softimage.com/index.php/INFO:_PIC_file_format +// See http://ozviz.wasp.uwa.edu.au/~pbourke/dataformats/softimagepic/ + +#ifndef STBI_NO_PIC +static int stbi__pic_is4(stbi__context * s, const char * str) { + int i; + for (i = 0; i < 4; ++i) + if (stbi__get8(s) != (stbi_uc)str[i]) + return 0; + + return 1; +} + +static int stbi__pic_test_core(stbi__context * s) { + int i; + + if (!stbi__pic_is4(s, "\x53\x80\xF6\x34")) + return 0; + + for (i = 0; i < 84; ++i) + stbi__get8(s); + + if (!stbi__pic_is4(s, "PICT")) + return 0; + + return 1; +} + +typedef struct { + stbi_uc size, type, channel; +} stbi__pic_packet; + +static stbi_uc * stbi__readval(stbi__context * s, int channel, stbi_uc * dest) { + int mask = 0x80, i; + + for (i = 0; i < 4; ++i, mask >>= 1) { + if (channel & mask) { + if (stbi__at_eof(s)) + return stbi__errpuc("bad file", "PIC file too short"); + dest[i] = stbi__get8(s); + } + } + + return dest; +} + +static void stbi__copyval(int channel, stbi_uc * dest, const stbi_uc * src) { + int mask = 0x80, i; + + for (i = 0; i < 4; ++i, mask >>= 1) + if (channel & mask) + dest[i] = src[i]; +} + +static stbi_uc * stbi__pic_load_core(stbi__context * s, int width, int height, int * comp, stbi_uc * result) { + int act_comp = 0, num_packets = 0, y, chained; + stbi__pic_packet packets[10]; + + // this will (should...) cater for even some bizarre stuff like having data + // for the same channel in multiple packets. + do { + stbi__pic_packet * packet; + + if (num_packets == sizeof(packets) / sizeof(packets[0])) + return stbi__errpuc("bad format", "too many packets"); + + packet = &packets[num_packets++]; + + chained = stbi__get8(s); + packet->size = stbi__get8(s); + packet->type = stbi__get8(s); + packet->channel = stbi__get8(s); + + act_comp |= packet->channel; + + if (stbi__at_eof(s)) + return stbi__errpuc("bad file", "file too short (reading packets)"); + if (packet->size != 8) + return stbi__errpuc("bad format", "packet isn't 8bpp"); + } while (chained); + + *comp = (act_comp & 0x10 ? 4 : 3); // has alpha channel? + + for (y = 0; y < height; ++y) { + int packet_idx; + + for (packet_idx = 0; packet_idx < num_packets; ++packet_idx) { + stbi__pic_packet * packet = &packets[packet_idx]; + stbi_uc * dest = result + y * width * 4; + + switch (packet->type) { + default: + return stbi__errpuc("bad format", "packet has bad compression type"); + + case 0: { // uncompressed + int x; + + for (x = 0; x < width; ++x, dest += 4) + if (!stbi__readval(s, packet->channel, dest)) + return 0; + break; + } + + case 1: // Pure RLE + { + int left = width, i; + + while (left > 0) { + stbi_uc count, value[4]; + + count = stbi__get8(s); + if (stbi__at_eof(s)) + return stbi__errpuc("bad file", "file too short (pure read count)"); + + if (count > left) + count = (stbi_uc)left; + + if (!stbi__readval(s, packet->channel, value)) + return 0; + + for (i = 0; i < count; ++i, dest += 4) + stbi__copyval(packet->channel, dest, value); + left -= count; + } + } break; + + case 2: { // Mixed RLE + int left = width; + while (left > 0) { + int count = stbi__get8(s), i; + if (stbi__at_eof(s)) + return stbi__errpuc("bad file", "file too short (mixed read count)"); + + if (count >= 128) { // Repeated + stbi_uc value[4]; + + if (count == 128) + count = stbi__get16be(s); + else + count -= 127; + if (count > left) + return stbi__errpuc("bad file", "scanline overrun"); + + if (!stbi__readval(s, packet->channel, value)) + return 0; + + for (i = 0; i < count; ++i, dest += 4) + stbi__copyval(packet->channel, dest, value); + } else { // Raw + ++count; + if (count > left) + return stbi__errpuc("bad file", "scanline overrun"); + + for (i = 0; i < count; ++i, dest += 4) + if (!stbi__readval(s, packet->channel, dest)) + return 0; + } + left -= count; + } + break; + } + } + } + } + + return result; +} + +static void * stbi__pic_load(stbi__context * s, int * px, int * py, int * comp, int req_comp, stbi__result_info * ri) { + stbi_uc * result; + int i, x, y, internal_comp; + STBI_NOTUSED(ri); + + if (!comp) + comp = &internal_comp; + + for (i = 0; i < 92; ++i) + stbi__get8(s); + + x = stbi__get16be(s); + y = stbi__get16be(s); + + if (y > STBI_MAX_DIMENSIONS) + return stbi__errpuc("too large", "Very large image (corrupt?)"); + if (x > STBI_MAX_DIMENSIONS) + return stbi__errpuc("too large", "Very large image (corrupt?)"); + + if (stbi__at_eof(s)) + return stbi__errpuc("bad file", "file too short (pic header)"); + if (!stbi__mad3sizes_valid(x, y, 4, 0)) + return stbi__errpuc("too large", "PIC image too large to decode"); + + stbi__get32be(s); // skip `ratio' + stbi__get16be(s); // skip `fields' + stbi__get16be(s); // skip `pad' + + // intermediate buffer is RGBA + result = (stbi_uc *)stbi__malloc_mad3(x, y, 4, 0); + if (!result) + return stbi__errpuc("outofmem", "Out of memory"); + memset(result, 0xff, x * y * 4); + + if (!stbi__pic_load_core(s, x, y, comp, result)) { + STBI_FREE(result); + result = 0; + } + *px = x; + *py = y; + if (req_comp == 0) + req_comp = *comp; + result = stbi__convert_format(result, 4, req_comp, x, y); + + return result; +} + +static int stbi__pic_test(stbi__context * s) { + int r = stbi__pic_test_core(s); + stbi__rewind(s); + return r; +} +#endif + +// ************************************************************************************************* +// GIF loader -- public domain by Jean-Marc Lienher -- simplified/shrunk by stb + +#ifndef STBI_NO_GIF +typedef struct { + stbi__int16 prefix; + stbi_uc first; + stbi_uc suffix; +} stbi__gif_lzw; + +typedef struct { + int w, h; + stbi_uc * out; // output buffer (always 4 components) + stbi_uc * background; // The current "background" as far as a gif is concerned + stbi_uc * history; + int flags, bgindex, ratio, transparent, eflags; + stbi_uc pal[256][4]; + stbi_uc lpal[256][4]; + stbi__gif_lzw codes[8192]; + stbi_uc * color_table; + int parse, step; + int lflags; + int start_x, start_y; + int max_x, max_y; + int cur_x, cur_y; + int line_size; + int delay; +} stbi__gif; + +static int stbi__gif_test_raw(stbi__context * s) { + int sz; + if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8') + return 0; + sz = stbi__get8(s); + if (sz != '9' && sz != '7') + return 0; + if (stbi__get8(s) != 'a') + return 0; + return 1; +} + +static int stbi__gif_test(stbi__context * s) { + int r = stbi__gif_test_raw(s); + stbi__rewind(s); + return r; +} + +static void stbi__gif_parse_colortable(stbi__context * s, stbi_uc pal[256][4], int num_entries, int transp) { + int i; + for (i = 0; i < num_entries; ++i) { + pal[i][2] = stbi__get8(s); + pal[i][1] = stbi__get8(s); + pal[i][0] = stbi__get8(s); + pal[i][3] = transp == i ? 0 : 255; + } +} + +static int stbi__gif_header(stbi__context * s, stbi__gif * g, int * comp, int is_info) { + stbi_uc version; + if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8') + return stbi__err("not GIF", "Corrupt GIF"); + + version = stbi__get8(s); + if (version != '7' && version != '9') + return stbi__err("not GIF", "Corrupt GIF"); + if (stbi__get8(s) != 'a') + return stbi__err("not GIF", "Corrupt GIF"); + + stbi__g_failure_reason = ""; + g->w = stbi__get16le(s); + g->h = stbi__get16le(s); + g->flags = stbi__get8(s); + g->bgindex = stbi__get8(s); + g->ratio = stbi__get8(s); + g->transparent = -1; + + if (g->w > STBI_MAX_DIMENSIONS) + return stbi__err("too large", "Very large image (corrupt?)"); + if (g->h > STBI_MAX_DIMENSIONS) + return stbi__err("too large", "Very large image (corrupt?)"); + + if (comp != 0) + *comp = 4; // can't actually tell whether it's 3 or 4 until we parse the comments + + if (is_info) + return 1; + + if (g->flags & 0x80) + stbi__gif_parse_colortable(s, g->pal, 2 << (g->flags & 7), -1); + + return 1; +} + +static int stbi__gif_info_raw(stbi__context * s, int * x, int * y, int * comp) { + stbi__gif * g = (stbi__gif *)stbi__malloc(sizeof(stbi__gif)); + if (!g) + return stbi__err("outofmem", "Out of memory"); + if (!stbi__gif_header(s, g, comp, 1)) { + STBI_FREE(g); + stbi__rewind(s); + return 0; + } + if (x) + *x = g->w; + if (y) + *y = g->h; + STBI_FREE(g); + return 1; +} + +static void stbi__out_gif_code(stbi__gif * g, stbi__uint16 code) { + stbi_uc *p, *c; + int idx; + + // recurse to decode the prefixes, since the linked-list is backwards, + // and working backwards through an interleaved image would be nasty + if (g->codes[code].prefix >= 0) + stbi__out_gif_code(g, g->codes[code].prefix); + + if (g->cur_y >= g->max_y) + return; + + idx = g->cur_x + g->cur_y; + p = &g->out[idx]; + g->history[idx / 4] = 1; + + c = &g->color_table[g->codes[code].suffix * 4]; + if (c[3] > 128) { // don't render transparent pixels; + p[0] = c[2]; + p[1] = c[1]; + p[2] = c[0]; + p[3] = c[3]; + } + g->cur_x += 4; + + if (g->cur_x >= g->max_x) { + g->cur_x = g->start_x; + g->cur_y += g->step; + + while (g->cur_y >= g->max_y && g->parse > 0) { + g->step = (1 << g->parse) * g->line_size; + g->cur_y = g->start_y + (g->step >> 1); + --g->parse; + } + } +} + +static stbi_uc * stbi__process_gif_raster(stbi__context * s, stbi__gif * g) { + stbi_uc lzw_cs; + stbi__int32 len, init_code; + stbi__uint32 first; + stbi__int32 codesize, codemask, avail, oldcode, bits, valid_bits, clear; + stbi__gif_lzw * p; + + lzw_cs = stbi__get8(s); + if (lzw_cs > 12) + return NULL; + clear = 1 << lzw_cs; + first = 1; + codesize = lzw_cs + 1; + codemask = (1 << codesize) - 1; + bits = 0; + valid_bits = 0; + for (init_code = 0; init_code < clear; init_code++) { + g->codes[init_code].prefix = -1; + g->codes[init_code].first = (stbi_uc)init_code; + g->codes[init_code].suffix = (stbi_uc)init_code; + } + + // support no starting clear code + avail = clear + 2; + oldcode = -1; + + len = 0; + for (;;) { + if (valid_bits < codesize) { + if (len == 0) { + len = stbi__get8(s); // start new block + if (len == 0) + return g->out; + } + --len; + bits |= (stbi__int32)stbi__get8(s) << valid_bits; + valid_bits += 8; + } else { + stbi__int32 code = bits & codemask; + bits >>= codesize; + valid_bits -= codesize; + // @OPTIMIZE: is there some way we can accelerate the non-clear path? + if (code == clear) { // clear code + codesize = lzw_cs + 1; + codemask = (1 << codesize) - 1; + avail = clear + 2; + oldcode = -1; + first = 0; + } else if (code == clear + 1) { // end of stream code + stbi__skip(s, len); + while ((len = stbi__get8(s)) > 0) + stbi__skip(s, len); + return g->out; + } else if (code <= avail) { + if (first) { + return stbi__errpuc("no clear code", "Corrupt GIF"); + } + + if (oldcode >= 0) { + p = &g->codes[avail++]; + if (avail > 8192) { + return stbi__errpuc("too many codes", "Corrupt GIF"); + } + + p->prefix = (stbi__int16)oldcode; + p->first = g->codes[oldcode].first; + p->suffix = (code == avail) ? p->first : g->codes[code].first; + } else if (code == avail) + return stbi__errpuc("illegal code in raster", "Corrupt GIF"); + + stbi__out_gif_code(g, (stbi__uint16)code); + + if ((avail & codemask) == 0 && avail <= 0x0FFF) { + codesize++; + codemask = (1 << codesize) - 1; + } + + oldcode = code; + } else { + return stbi__errpuc("illegal code in raster", "Corrupt GIF"); + } + } + } +} + +// this function is designed to support animated gifs, although stb_image doesn't support it +// two back is the image from two frames ago, used for a very specific disposal format +static stbi_uc * stbi__gif_load_next(stbi__context * s, stbi__gif * g, int * comp, int req_comp, stbi_uc * two_back) { + int dispose; + int first_frame; + int pi; + int pcount; + STBI_NOTUSED(req_comp); + + // on first frame, any non-written pixels get the background colour (non-transparent) + first_frame = 0; + if (g->out == 0) { + if (!stbi__gif_header(s, g, comp, 0)) + return 0; // stbi__g_failure_reason set by stbi__gif_header + if (!stbi__mad3sizes_valid(4, g->w, g->h, 0)) + return stbi__errpuc("too large", "GIF image is too large"); + pcount = g->w * g->h; + g->out = (stbi_uc *)stbi__malloc(4 * pcount); + g->background = (stbi_uc *)stbi__malloc(4 * pcount); + g->history = (stbi_uc *)stbi__malloc(pcount); + if (!g->out || !g->background || !g->history) + return stbi__errpuc("outofmem", "Out of memory"); + + // image is treated as "transparent" at the start - ie, nothing overwrites the current background; + // background colour is only used for pixels that are not rendered first frame, after that "background" + // color refers to the color that was there the previous frame. + memset(g->out, 0x00, 4 * pcount); + memset(g->background, 0x00, 4 * pcount); // state of the background (starts transparent) + memset(g->history, 0x00, pcount); // pixels that were affected previous frame + first_frame = 1; + } else { + // second frame - how do we dispose of the previous one? + dispose = (g->eflags & 0x1C) >> 2; + pcount = g->w * g->h; + + if ((dispose == 3) && (two_back == 0)) { + dispose = 2; // if I don't have an image to revert back to, default to the old background + } + + if (dispose == 3) { // use previous graphic + for (pi = 0; pi < pcount; ++pi) { + if (g->history[pi]) { + memcpy(&g->out[pi * 4], &two_back[pi * 4], 4); + } + } + } else if (dispose == 2) { + // restore what was changed last frame to background before that frame; + for (pi = 0; pi < pcount; ++pi) { + if (g->history[pi]) { + memcpy(&g->out[pi * 4], &g->background[pi * 4], 4); + } + } + } else { + // This is a non-disposal case eithe way, so just + // leave the pixels as is, and they will become the new background + // 1: do not dispose + // 0: not specified. + } + + // background is what out is after the undoing of the previou frame; + memcpy(g->background, g->out, 4 * g->w * g->h); + } + + // clear my history; + memset(g->history, 0x00, g->w * g->h); // pixels that were affected previous frame + + for (;;) { + int tag = stbi__get8(s); + switch (tag) { + case 0x2C: /* Image Descriptor */ + { + stbi__int32 x, y, w, h; + stbi_uc * o; + + x = stbi__get16le(s); + y = stbi__get16le(s); + w = stbi__get16le(s); + h = stbi__get16le(s); + if (((x + w) > (g->w)) || ((y + h) > (g->h))) + return stbi__errpuc("bad Image Descriptor", "Corrupt GIF"); + + g->line_size = g->w * 4; + g->start_x = x * 4; + g->start_y = y * g->line_size; + g->max_x = g->start_x + w * 4; + g->max_y = g->start_y + h * g->line_size; + g->cur_x = g->start_x; + g->cur_y = g->start_y; + + // if the width of the specified rectangle is 0, that means + // we may not see *any* pixels or the image is malformed; + // to make sure this is caught, move the current y down to + // max_y (which is what out_gif_code checks). + if (w == 0) + g->cur_y = g->max_y; + + g->lflags = stbi__get8(s); + + if (g->lflags & 0x40) { + g->step = 8 * g->line_size; // first interlaced spacing + g->parse = 3; + } else { + g->step = g->line_size; + g->parse = 0; + } + + if (g->lflags & 0x80) { + stbi__gif_parse_colortable(s, g->lpal, 2 << (g->lflags & 7), g->eflags & 0x01 ? g->transparent : -1); + g->color_table = (stbi_uc *)g->lpal; + } else if (g->flags & 0x80) { + g->color_table = (stbi_uc *)g->pal; + } else + return stbi__errpuc("missing color table", "Corrupt GIF"); + + o = stbi__process_gif_raster(s, g); + if (!o) + return NULL; + + // if this was the first frame, + pcount = g->w * g->h; + if (first_frame && (g->bgindex > 0)) { + // if first frame, any pixel not drawn to gets the background color + for (pi = 0; pi < pcount; ++pi) { + if (g->history[pi] == 0) { + g->pal[g->bgindex][3] = + 255; // just in case it was made transparent, undo that; It will be reset next frame if need be; + memcpy(&g->out[pi * 4], &g->pal[g->bgindex], 4); + } + } + } + + return o; + } + + case 0x21: // Comment Extension. + { + int len; + int ext = stbi__get8(s); + if (ext == 0xF9) { // Graphic Control Extension. + len = stbi__get8(s); + if (len == 4) { + g->eflags = stbi__get8(s); + g->delay = 10 * stbi__get16le(s); // delay - 1/100th of a second, saving as 1/1000ths. + + // unset old transparent + if (g->transparent >= 0) { + g->pal[g->transparent][3] = 255; + } + if (g->eflags & 0x01) { + g->transparent = stbi__get8(s); + if (g->transparent >= 0) { + g->pal[g->transparent][3] = 0; + } + } else { + // don't need transparent + stbi__skip(s, 1); + g->transparent = -1; + } + } else { + stbi__skip(s, len); + break; + } + } + while ((len = stbi__get8(s)) != 0) { + stbi__skip(s, len); + } + break; + } + + case 0x3B: // gif stream termination code + return (stbi_uc *)s; // using '1' causes warning on some compilers + + default: + return stbi__errpuc("unknown code", "Corrupt GIF"); + } + } +} + +static void * stbi__load_gif_main_outofmem(stbi__gif * g, stbi_uc * out, int ** delays) { + STBI_FREE(g->out); + STBI_FREE(g->history); + STBI_FREE(g->background); + + if (out) + STBI_FREE(out); + if (delays && *delays) + STBI_FREE(*delays); + return stbi__errpuc("outofmem", "Out of memory"); +} + +static void * stbi__load_gif_main(stbi__context * s, int ** delays, int * x, int * y, int * z, int * comp, int req_comp) { + if (stbi__gif_test(s)) { + int layers = 0; + stbi_uc * u = 0; + stbi_uc * out = 0; + stbi_uc * two_back = 0; + stbi__gif g; + int stride; + int out_size = 0; + int delays_size = 0; + + STBI_NOTUSED(out_size); + STBI_NOTUSED(delays_size); + + memset(&g, 0, sizeof(g)); + if (delays) { + *delays = 0; + } + + do { + u = stbi__gif_load_next(s, &g, comp, req_comp, two_back); + if (u == (stbi_uc *)s) + u = 0; // end of animated gif marker + + if (u) { + *x = g.w; + *y = g.h; + ++layers; + stride = g.w * g.h * 4; + + if (out) { + void * tmp = (stbi_uc *)STBI_REALLOC_SIZED(out, out_size, layers * stride); + if (!tmp) + return stbi__load_gif_main_outofmem(&g, out, delays); + else { + out = (stbi_uc *)tmp; + out_size = layers * stride; + } + + if (delays) { + int * new_delays = (int *)STBI_REALLOC_SIZED(*delays, delays_size, sizeof(int) * layers); + if (!new_delays) + return stbi__load_gif_main_outofmem(&g, out, delays); + *delays = new_delays; + delays_size = layers * sizeof(int); + } + } else { + out = (stbi_uc *)stbi__malloc(layers * stride); + if (!out) + return stbi__load_gif_main_outofmem(&g, out, delays); + out_size = layers * stride; + if (delays) { + *delays = (int *)stbi__malloc(layers * sizeof(int)); + if (!*delays) + return stbi__load_gif_main_outofmem(&g, out, delays); + delays_size = layers * sizeof(int); + } + } + memcpy(out + ((layers - 1) * stride), u, stride); + if (layers >= 2) { + two_back = out - 2 * stride; + } + + if (delays) { + (*delays)[layers - 1U] = g.delay; + } + } + } while (u != 0); + + // free temp buffer; + STBI_FREE(g.out); + STBI_FREE(g.history); + STBI_FREE(g.background); + + // do the final conversion after loading everything; + if (req_comp && req_comp != 4) + out = stbi__convert_format(out, 4, req_comp, layers * g.w, g.h); + + *z = layers; + return out; + } else { + return stbi__errpuc("not GIF", "Image was not as a gif type."); + } +} + +static void * stbi__gif_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri) { + stbi_uc * u = 0; + stbi__gif g; + memset(&g, 0, sizeof(g)); + STBI_NOTUSED(ri); + + u = stbi__gif_load_next(s, &g, comp, req_comp, 0); + if (u == (stbi_uc *)s) + u = 0; // end of animated gif marker + if (u) { + *x = g.w; + *y = g.h; + + // moved conversion to after successful load so that the same + // can be done for multiple frames. + if (req_comp && req_comp != 4) + u = stbi__convert_format(u, 4, req_comp, g.w, g.h); + } else if (g.out) { + // if there was an error and we allocated an image buffer, free it! + STBI_FREE(g.out); + } + + // free buffers needed for multiple frame loading; + STBI_FREE(g.history); + STBI_FREE(g.background); + + return u; +} + +static int stbi__gif_info(stbi__context * s, int * x, int * y, int * comp) { return stbi__gif_info_raw(s, x, y, comp); } +#endif + +// ************************************************************************************************* +// Radiance RGBE HDR loader +// originally by Nicolas Schulz +#ifndef STBI_NO_HDR +static int stbi__hdr_test_core(stbi__context * s, const char * signature) { + int i; + for (i = 0; signature[i]; ++i) + if (stbi__get8(s) != signature[i]) + return 0; + stbi__rewind(s); + return 1; +} + +static int stbi__hdr_test(stbi__context * s) { + int r = stbi__hdr_test_core(s, "#?RADIANCE\n"); + stbi__rewind(s); + if (!r) { + r = stbi__hdr_test_core(s, "#?RGBE\n"); + stbi__rewind(s); + } + return r; +} + +#define STBI__HDR_BUFLEN 1024 +static char * stbi__hdr_gettoken(stbi__context * z, char * buffer) { + int len = 0; + char c = '\0'; + + c = (char)stbi__get8(z); + + while (!stbi__at_eof(z) && c != '\n') { + buffer[len++] = c; + if (len == STBI__HDR_BUFLEN - 1) { + // flush to end of line + while (!stbi__at_eof(z) && stbi__get8(z) != '\n') + ; + break; + } + c = (char)stbi__get8(z); + } + + buffer[len] = 0; + return buffer; +} + +static void stbi__hdr_convert(float * output, stbi_uc * input, int req_comp) { + if (input[3] != 0) { + float f1; + // Exponent + f1 = (float)ldexp(1.0f, input[3] - (int)(128 + 8)); + if (req_comp <= 2) + output[0] = (input[0] + input[1] + input[2]) * f1 / 3; + else { + output[0] = input[0] * f1; + output[1] = input[1] * f1; + output[2] = input[2] * f1; + } + if (req_comp == 2) + output[1] = 1; + if (req_comp == 4) + output[3] = 1; + } else { + switch (req_comp) { + case 4: + output[3] = 1; /* fallthrough */ + case 3: + output[0] = output[1] = output[2] = 0; + break; + case 2: + output[1] = 1; /* fallthrough */ + case 1: + output[0] = 0; + break; + } + } +} + +static float * stbi__hdr_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri) { + char buffer[STBI__HDR_BUFLEN]; + char * token; + int valid = 0; + int width, height; + stbi_uc * scanline; + float * hdr_data; + int len; + unsigned char count, value; + int i, j, k, c1, c2, z; + const char * headerToken; + STBI_NOTUSED(ri); + + // Check identifier + headerToken = stbi__hdr_gettoken(s, buffer); + if (strcmp(headerToken, "#?RADIANCE") != 0 && strcmp(headerToken, "#?RGBE") != 0) + return stbi__errpf("not HDR", "Corrupt HDR image"); + + // Parse header + for (;;) { + token = stbi__hdr_gettoken(s, buffer); + if (token[0] == 0) + break; + if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) + valid = 1; + } + + if (!valid) + return stbi__errpf("unsupported format", "Unsupported HDR format"); + + // Parse width and height + // can't use sscanf() if we're not using stdio! + token = stbi__hdr_gettoken(s, buffer); + if (strncmp(token, "-Y ", 3)) + return stbi__errpf("unsupported data layout", "Unsupported HDR format"); + token += 3; + height = (int)strtol(token, &token, 10); + while (*token == ' ') + ++token; + if (strncmp(token, "+X ", 3)) + return stbi__errpf("unsupported data layout", "Unsupported HDR format"); + token += 3; + width = (int)strtol(token, NULL, 10); + + if (height > STBI_MAX_DIMENSIONS) + return stbi__errpf("too large", "Very large image (corrupt?)"); + if (width > STBI_MAX_DIMENSIONS) + return stbi__errpf("too large", "Very large image (corrupt?)"); + + *x = width; + *y = height; + + if (comp) + *comp = 3; + if (req_comp == 0) + req_comp = 3; + + if (!stbi__mad4sizes_valid(width, height, req_comp, sizeof(float), 0)) + return stbi__errpf("too large", "HDR image is too large"); + + // Read data + hdr_data = (float *)stbi__malloc_mad4(width, height, req_comp, sizeof(float), 0); + if (!hdr_data) + return stbi__errpf("outofmem", "Out of memory"); + + // Load image data + // image data is stored as some number of sca + if (width < 8 || width >= 32768) { + // Read flat data + for (j = 0; j < height; ++j) { + for (i = 0; i < width; ++i) { + stbi_uc rgbe[4]; + main_decode_loop: + stbi__getn(s, rgbe, 4); + stbi__hdr_convert(hdr_data + j * width * req_comp + i * req_comp, rgbe, req_comp); + } + } + } else { + // Read RLE-encoded data + scanline = NULL; + + for (j = 0; j < height; ++j) { + c1 = stbi__get8(s); + c2 = stbi__get8(s); + len = stbi__get8(s); + if (c1 != 2 || c2 != 2 || (len & 0x80)) { + // not run-length encoded, so we have to actually use THIS data as a decoded + // pixel (note this can't be a valid pixel--one of RGB must be >= 128) + stbi_uc rgbe[4]; + rgbe[0] = (stbi_uc)c1; + rgbe[1] = (stbi_uc)c2; + rgbe[2] = (stbi_uc)len; + rgbe[3] = (stbi_uc)stbi__get8(s); + stbi__hdr_convert(hdr_data, rgbe, req_comp); + i = 1; + j = 0; + STBI_FREE(scanline); + goto main_decode_loop; // yes, this makes no sense + } + len <<= 8; + len |= stbi__get8(s); + if (len != width) { + STBI_FREE(hdr_data); + STBI_FREE(scanline); + return stbi__errpf("invalid decoded scanline length", "corrupt HDR"); + } + if (scanline == NULL) { + scanline = (stbi_uc *)stbi__malloc_mad2(width, 4, 0); + if (!scanline) { + STBI_FREE(hdr_data); + return stbi__errpf("outofmem", "Out of memory"); + } + } + + for (k = 0; k < 4; ++k) { + int nleft; + i = 0; + while ((nleft = width - i) > 0) { + count = stbi__get8(s); + if (count > 128) { + // Run + value = stbi__get8(s); + count -= 128; + if ((count == 0) || (count > nleft)) { + STBI_FREE(hdr_data); + STBI_FREE(scanline); + return stbi__errpf("corrupt", "bad RLE data in HDR"); + } + for (z = 0; z < count; ++z) + scanline[i++ * 4 + k] = value; + } else { + // Dump + if ((count == 0) || (count > nleft)) { + STBI_FREE(hdr_data); + STBI_FREE(scanline); + return stbi__errpf("corrupt", "bad RLE data in HDR"); + } + for (z = 0; z < count; ++z) + scanline[i++ * 4 + k] = stbi__get8(s); + } + } + } + for (i = 0; i < width; ++i) + stbi__hdr_convert(hdr_data + (j * width + i) * req_comp, scanline + i * 4, req_comp); + } + if (scanline) + STBI_FREE(scanline); + } + + return hdr_data; +} + +static int stbi__hdr_info(stbi__context * s, int * x, int * y, int * comp) { + char buffer[STBI__HDR_BUFLEN]; + char * token; + int valid = 0; + int dummy; + + if (!x) + x = &dummy; + if (!y) + y = &dummy; + if (!comp) + comp = &dummy; + + if (stbi__hdr_test(s) == 0) { + stbi__rewind(s); + return 0; + } + + for (;;) { + token = stbi__hdr_gettoken(s, buffer); + if (token[0] == 0) + break; + if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) + valid = 1; + } + + if (!valid) { + stbi__rewind(s); + return 0; + } + token = stbi__hdr_gettoken(s, buffer); + if (strncmp(token, "-Y ", 3)) { + stbi__rewind(s); + return 0; + } + token += 3; + *y = (int)strtol(token, &token, 10); + while (*token == ' ') + ++token; + if (strncmp(token, "+X ", 3)) { + stbi__rewind(s); + return 0; + } + token += 3; + *x = (int)strtol(token, NULL, 10); + *comp = 3; + return 1; +} +#endif // STBI_NO_HDR + +#ifndef STBI_NO_BMP +static int stbi__bmp_info(stbi__context * s, int * x, int * y, int * comp) { + void * p; + stbi__bmp_data info; + + info.all_a = 255; + p = stbi__bmp_parse_header(s, &info); + if (p == NULL) { + stbi__rewind(s); + return 0; + } + if (x) + *x = s->img_x; + if (y) + *y = s->img_y; + if (comp) { + if (info.bpp == 24 && info.ma == 0xff000000) + *comp = 3; + else + *comp = info.ma ? 4 : 3; + } + return 1; +} +#endif + +#ifndef STBI_NO_PSD +static int stbi__psd_info(stbi__context * s, int * x, int * y, int * comp) { + int channelCount, dummy, depth; + if (!x) + x = &dummy; + if (!y) + y = &dummy; + if (!comp) + comp = &dummy; + if (stbi__get32be(s) != 0x38425053) { + stbi__rewind(s); + return 0; + } + if (stbi__get16be(s) != 1) { + stbi__rewind(s); + return 0; + } + stbi__skip(s, 6); + channelCount = stbi__get16be(s); + if (channelCount < 0 || channelCount > 16) { + stbi__rewind(s); + return 0; + } + *y = stbi__get32be(s); + *x = stbi__get32be(s); + depth = stbi__get16be(s); + if (depth != 8 && depth != 16) { + stbi__rewind(s); + return 0; + } + if (stbi__get16be(s) != 3) { + stbi__rewind(s); + return 0; + } + *comp = 4; + return 1; +} + +static int stbi__psd_is16(stbi__context * s) { + int channelCount, depth; + if (stbi__get32be(s) != 0x38425053) { + stbi__rewind(s); + return 0; + } + if (stbi__get16be(s) != 1) { + stbi__rewind(s); + return 0; + } + stbi__skip(s, 6); + channelCount = stbi__get16be(s); + if (channelCount < 0 || channelCount > 16) { + stbi__rewind(s); + return 0; + } + STBI_NOTUSED(stbi__get32be(s)); + STBI_NOTUSED(stbi__get32be(s)); + depth = stbi__get16be(s); + if (depth != 16) { + stbi__rewind(s); + return 0; + } + return 1; +} +#endif + +#ifndef STBI_NO_PIC +static int stbi__pic_info(stbi__context * s, int * x, int * y, int * comp) { + int act_comp = 0, num_packets = 0, chained, dummy; + stbi__pic_packet packets[10]; + + if (!x) + x = &dummy; + if (!y) + y = &dummy; + if (!comp) + comp = &dummy; + + if (!stbi__pic_is4(s, "\x53\x80\xF6\x34")) { + stbi__rewind(s); + return 0; + } + + stbi__skip(s, 88); + + *x = stbi__get16be(s); + *y = stbi__get16be(s); + if (stbi__at_eof(s)) { + stbi__rewind(s); + return 0; + } + if ((*x) != 0 && (1 << 28) / (*x) < (*y)) { + stbi__rewind(s); + return 0; + } + + stbi__skip(s, 8); + + do { + stbi__pic_packet * packet; + + if (num_packets == sizeof(packets) / sizeof(packets[0])) + return 0; + + packet = &packets[num_packets++]; + chained = stbi__get8(s); + packet->size = stbi__get8(s); + packet->type = stbi__get8(s); + packet->channel = stbi__get8(s); + act_comp |= packet->channel; + + if (stbi__at_eof(s)) { + stbi__rewind(s); + return 0; + } + if (packet->size != 8) { + stbi__rewind(s); + return 0; + } + } while (chained); + + *comp = (act_comp & 0x10 ? 4 : 3); + + return 1; +} +#endif + +// ************************************************************************************************* +// Portable Gray Map and Portable Pixel Map loader +// by Ken Miller +// +// PGM: http://netpbm.sourceforge.net/doc/pgm.html +// PPM: http://netpbm.sourceforge.net/doc/ppm.html +// +// Known limitations: +// Does not support comments in the header section +// Does not support ASCII image data (formats P2 and P3) + +#ifndef STBI_NO_PNM + +static int stbi__pnm_test(stbi__context * s) { + char p, t; + p = (char)stbi__get8(s); + t = (char)stbi__get8(s); + if (p != 'P' || (t != '5' && t != '6')) { + stbi__rewind(s); + return 0; + } + return 1; +} + +static void * stbi__pnm_load(stbi__context * s, int * x, int * y, int * comp, int req_comp, stbi__result_info * ri) { + stbi_uc * out; + STBI_NOTUSED(ri); + + ri->bits_per_channel = stbi__pnm_info(s, (int *)&s->img_x, (int *)&s->img_y, (int *)&s->img_n); + if (ri->bits_per_channel == 0) + return 0; + + if (s->img_y > STBI_MAX_DIMENSIONS) + return stbi__errpuc("too large", "Very large image (corrupt?)"); + if (s->img_x > STBI_MAX_DIMENSIONS) + return stbi__errpuc("too large", "Very large image (corrupt?)"); + + *x = s->img_x; + *y = s->img_y; + if (comp) + *comp = s->img_n; + + if (!stbi__mad4sizes_valid(s->img_n, s->img_x, s->img_y, ri->bits_per_channel / 8, 0)) + return stbi__errpuc("too large", "PNM too large"); + + out = (stbi_uc *)stbi__malloc_mad4(s->img_n, s->img_x, s->img_y, ri->bits_per_channel / 8, 0); + if (!out) + return stbi__errpuc("outofmem", "Out of memory"); + if (!stbi__getn(s, out, s->img_n * s->img_x * s->img_y * (ri->bits_per_channel / 8))) { + STBI_FREE(out); + return stbi__errpuc("bad PNM", "PNM file truncated"); + } + + if (req_comp && req_comp != s->img_n) { + if (ri->bits_per_channel == 16) { + out = (stbi_uc *)stbi__convert_format16((stbi__uint16 *)out, s->img_n, req_comp, s->img_x, s->img_y); + } else { + out = stbi__convert_format(out, s->img_n, req_comp, s->img_x, s->img_y); + } + if (out == NULL) + return out; // stbi__convert_format frees input on failure + } + return out; +} + +static int stbi__pnm_isspace(char c) { return c == ' ' || c == '\t' || c == '\n' || c == '\v' || c == '\f' || c == '\r'; } + +static void stbi__pnm_skip_whitespace(stbi__context * s, char * c) { + for (;;) { + while (!stbi__at_eof(s) && stbi__pnm_isspace(*c)) + *c = (char)stbi__get8(s); + + if (stbi__at_eof(s) || *c != '#') + break; + + while (!stbi__at_eof(s) && *c != '\n' && *c != '\r') + *c = (char)stbi__get8(s); + } +} + +static int stbi__pnm_isdigit(char c) { return c >= '0' && c <= '9'; } + +static int stbi__pnm_getinteger(stbi__context * s, char * c) { + int value = 0; + + while (!stbi__at_eof(s) && stbi__pnm_isdigit(*c)) { + value = value * 10 + (*c - '0'); + *c = (char)stbi__get8(s); + if ((value > 214748364) || (value == 214748364 && *c > '7')) + return stbi__err("integer parse overflow", "Parsing an integer in the PPM header overflowed a 32-bit int"); + } + + return value; +} + +static int stbi__pnm_info(stbi__context * s, int * x, int * y, int * comp) { + int maxv, dummy; + char c, p, t; + + if (!x) + x = &dummy; + if (!y) + y = &dummy; + if (!comp) + comp = &dummy; + + stbi__rewind(s); + + // Get identifier + p = (char)stbi__get8(s); + t = (char)stbi__get8(s); + if (p != 'P' || (t != '5' && t != '6')) { + stbi__rewind(s); + return 0; + } + + *comp = (t == '6') ? 3 : 1; // '5' is 1-component .pgm; '6' is 3-component .ppm + + c = (char)stbi__get8(s); + stbi__pnm_skip_whitespace(s, &c); + + *x = stbi__pnm_getinteger(s, &c); // read width + if (*x == 0) + return stbi__err("invalid width", "PPM image header had zero or overflowing width"); + stbi__pnm_skip_whitespace(s, &c); + + *y = stbi__pnm_getinteger(s, &c); // read height + if (*y == 0) + return stbi__err("invalid width", "PPM image header had zero or overflowing width"); + stbi__pnm_skip_whitespace(s, &c); + + maxv = stbi__pnm_getinteger(s, &c); // read max value + if (maxv > 65535) + return stbi__err("max value > 65535", "PPM image supports only 8-bit and 16-bit images"); + else if (maxv > 255) + return 16; + else + return 8; +} + +static int stbi__pnm_is16(stbi__context * s) { + if (stbi__pnm_info(s, NULL, NULL, NULL) == 16) + return 1; + return 0; +} +#endif + +static int stbi__info_main(stbi__context * s, int * x, int * y, int * comp) { +#ifndef STBI_NO_JPEG + if (stbi__jpeg_info(s, x, y, comp)) + return 1; +#endif + +#ifndef STBI_NO_PNG + if (stbi__png_info(s, x, y, comp)) + return 1; +#endif + +#ifndef STBI_NO_GIF + if (stbi__gif_info(s, x, y, comp)) + return 1; +#endif + +#ifndef STBI_NO_BMP + if (stbi__bmp_info(s, x, y, comp)) + return 1; +#endif + +#ifndef STBI_NO_PSD + if (stbi__psd_info(s, x, y, comp)) + return 1; +#endif + +#ifndef STBI_NO_PIC + if (stbi__pic_info(s, x, y, comp)) + return 1; +#endif + +#ifndef STBI_NO_PNM + if (stbi__pnm_info(s, x, y, comp)) + return 1; +#endif + +#ifndef STBI_NO_HDR + if (stbi__hdr_info(s, x, y, comp)) + return 1; +#endif + +// test tga last because it's a crappy test! +#ifndef STBI_NO_TGA + if (stbi__tga_info(s, x, y, comp)) + return 1; +#endif + return stbi__err("unknown image type", "Image not of any known type, or corrupt"); +} + +static int stbi__is_16_main(stbi__context * s) { +#ifndef STBI_NO_PNG + if (stbi__png_is16(s)) + return 1; +#endif + +#ifndef STBI_NO_PSD + if (stbi__psd_is16(s)) + return 1; +#endif + +#ifndef STBI_NO_PNM + if (stbi__pnm_is16(s)) + return 1; +#endif + return 0; +} + +#ifndef STBI_NO_STDIO +STBIDEF int stbi_info(char const * filename, int * x, int * y, int * comp) { + FILE * f = stbi__fopen(filename, "rb"); + int result; + if (!f) + return stbi__err("can't fopen", "Unable to open file"); + result = stbi_info_from_file(f, x, y, comp); + fclose(f); + return result; +} + +STBIDEF int stbi_info_from_file(FILE * f, int * x, int * y, int * comp) { + int r; + stbi__context s; + long pos = ftell(f); + stbi__start_file(&s, f); + r = stbi__info_main(&s, x, y, comp); + fseek(f, pos, SEEK_SET); + return r; +} + +STBIDEF int stbi_is_16_bit(char const * filename) { + FILE * f = stbi__fopen(filename, "rb"); + int result; + if (!f) + return stbi__err("can't fopen", "Unable to open file"); + result = stbi_is_16_bit_from_file(f); + fclose(f); + return result; +} + +STBIDEF int stbi_is_16_bit_from_file(FILE * f) { + int r; + stbi__context s; + long pos = ftell(f); + stbi__start_file(&s, f); + r = stbi__is_16_main(&s); + fseek(f, pos, SEEK_SET); + return r; +} +#endif // !STBI_NO_STDIO + +STBIDEF int stbi_info_from_memory(stbi_uc const * buffer, int len, int * x, int * y, int * comp) { + stbi__context s; + stbi__start_mem(&s, buffer, len); + return stbi__info_main(&s, x, y, comp); +} + +STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const * c, void * user, int * x, int * y, int * comp) { + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *)c, user); + return stbi__info_main(&s, x, y, comp); +} + +STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const * buffer, int len) { + stbi__context s; + stbi__start_mem(&s, buffer, len); + return stbi__is_16_main(&s); +} + +STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const * c, void * user) { + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *)c, user); + return stbi__is_16_main(&s); +} + +#endif // STB_IMAGE_IMPLEMENTATION + +/* + revision history: + 2.20 (2019-02-07) support utf8 filenames in Windows; fix warnings and platform ifdefs + 2.19 (2018-02-11) fix warning + 2.18 (2018-01-30) fix warnings + 2.17 (2018-01-29) change sbti__shiftsigned to avoid clang -O2 bug + 1-bit BMP + *_is_16_bit api + avoid warnings + 2.16 (2017-07-23) all functions have 16-bit variants; + STBI_NO_STDIO works again; + compilation fixes; + fix rounding in unpremultiply; + optimize vertical flip; + disable raw_len validation; + documentation fixes + 2.15 (2017-03-18) fix png-1,2,4 bug; now all Imagenet JPGs decode; + warning fixes; disable run-time SSE detection on gcc; + uniform handling of optional "return" values; + thread-safe initialization of zlib tables + 2.14 (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs + 2.13 (2016-11-29) add 16-bit API, only supported for PNG right now + 2.12 (2016-04-02) fix typo in 2.11 PSD fix that caused crashes + 2.11 (2016-04-02) allocate large structures on the stack + remove white matting for transparent PSD + fix reported channel count for PNG & BMP + re-enable SSE2 in non-gcc 64-bit + support RGB-formatted JPEG + read 16-bit PNGs (only as 8-bit) + 2.10 (2016-01-22) avoid warning introduced in 2.09 by STBI_REALLOC_SIZED + 2.09 (2016-01-16) allow comments in PNM files + 16-bit-per-pixel TGA (not bit-per-component) + info() for TGA could break due to .hdr handling + info() for BMP to shares code instead of sloppy parse + can use STBI_REALLOC_SIZED if allocator doesn't support realloc + code cleanup + 2.08 (2015-09-13) fix to 2.07 cleanup, reading RGB PSD as RGBA + 2.07 (2015-09-13) fix compiler warnings + partial animated GIF support + limited 16-bpc PSD support + #ifdef unused functions + bug with < 92 byte PIC,PNM,HDR,TGA + 2.06 (2015-04-19) fix bug where PSD returns wrong '*comp' value + 2.05 (2015-04-19) fix bug in progressive JPEG handling, fix warning + 2.04 (2015-04-15) try to re-enable SIMD on MinGW 64-bit + 2.03 (2015-04-12) extra corruption checking (mmozeiko) + stbi_set_flip_vertically_on_load (nguillemot) + fix NEON support; fix mingw support + 2.02 (2015-01-19) fix incorrect assert, fix warning + 2.01 (2015-01-17) fix various warnings; suppress SIMD on gcc 32-bit without -msse2 + 2.00b (2014-12-25) fix STBI_MALLOC in progressive JPEG + 2.00 (2014-12-25) optimize JPG, including x86 SSE2 & NEON SIMD (ryg) + progressive JPEG (stb) + PGM/PPM support (Ken Miller) + STBI_MALLOC,STBI_REALLOC,STBI_FREE + GIF bugfix -- seemingly never worked + STBI_NO_*, STBI_ONLY_* + 1.48 (2014-12-14) fix incorrectly-named assert() + 1.47 (2014-12-14) 1/2/4-bit PNG support, both direct and paletted (Omar Cornut & stb) + optimize PNG (ryg) + fix bug in interlaced PNG with user-specified channel count (stb) + 1.46 (2014-08-26) + fix broken tRNS chunk (colorkey-style transparency) in non-paletted PNG + 1.45 (2014-08-16) + fix MSVC-ARM internal compiler error by wrapping malloc + 1.44 (2014-08-07) + various warning fixes from Ronny Chevalier + 1.43 (2014-07-15) + fix MSVC-only compiler problem in code changed in 1.42 + 1.42 (2014-07-09) + don't define _CRT_SECURE_NO_WARNINGS (affects user code) + fixes to stbi__cleanup_jpeg path + added STBI_ASSERT to avoid requiring assert.h + 1.41 (2014-06-25) + fix search&replace from 1.36 that messed up comments/error messages + 1.40 (2014-06-22) + fix gcc struct-initialization warning + 1.39 (2014-06-15) + fix to TGA optimization when req_comp != number of components in TGA; + fix to GIF loading because BMP wasn't rewinding (whoops, no GIFs in my test suite) + add support for BMP version 5 (more ignored fields) + 1.38 (2014-06-06) + suppress MSVC warnings on integer casts truncating values + fix accidental rename of 'skip' field of I/O + 1.37 (2014-06-04) + remove duplicate typedef + 1.36 (2014-06-03) + convert to header file single-file library + if de-iphone isn't set, load iphone images color-swapped instead of returning NULL + 1.35 (2014-05-27) + various warnings + fix broken STBI_SIMD path + fix bug where stbi_load_from_file no longer left file pointer in correct place + fix broken non-easy path for 32-bit BMP (possibly never used) + TGA optimization by Arseny Kapoulkine + 1.34 (unknown) + use STBI_NOTUSED in stbi__resample_row_generic(), fix one more leak in tga failure case + 1.33 (2011-07-14) + make stbi_is_hdr work in STBI_NO_HDR (as specified), minor compiler-friendly improvements + 1.32 (2011-07-13) + support for "info" function for all supported filetypes (SpartanJ) + 1.31 (2011-06-20) + a few more leak fixes, bug in PNG handling (SpartanJ) + 1.30 (2011-06-11) + added ability to load files via callbacks to accomidate custom input streams (Ben Wenger) + removed deprecated format-specific test/load functions + removed support for installable file formats (stbi_loader) -- would have been broken for IO callbacks + anyway error cases in bmp and tga give messages and don't leak (Raymond Barbiero, grisha) fix inefficiency in + decoding 32-bit BMP (David Woo) 1.29 (2010-08-16) various warning fixes from Aurelien Pocheville 1.28 (2010-08-01) + fix bug in GIF palette transparency (SpartanJ) + 1.27 (2010-08-01) + cast-to-stbi_uc to fix warnings + 1.26 (2010-07-24) + fix bug in file buffering for PNG reported by SpartanJ + 1.25 (2010-07-17) + refix trans_data warning (Won Chun) + 1.24 (2010-07-12) + perf improvements reading from files on platforms with lock-heavy fgetc() + minor perf improvements for jpeg + deprecated type-specific functions so we'll get feedback if they're needed + attempt to fix trans_data warning (Won Chun) + 1.23 fixed bug in iPhone support + 1.22 (2010-07-10) + removed image *writing* support + stbi_info support from Jetro Lauha + GIF support from Jean-Marc Lienher + iPhone PNG-extensions from James Brown + warning-fixes from Nicolas Schulz and Janez Zemva (i.stbi__err. Janez (U+017D)emva) + 1.21 fix use of 'stbi_uc' in header (reported by jon blow) + 1.20 added support for Softimage PIC, by Tom Seddon + 1.19 bug in interlaced PNG corruption check (found by ryg) + 1.18 (2008-08-02) + fix a threading bug (local mutable static) + 1.17 support interlaced PNG + 1.16 major bugfix - stbi__convert_format converted one too many pixels + 1.15 initialize some fields for thread safety + 1.14 fix threadsafe conversion bug + header-file-only version (#define STBI_HEADER_FILE_ONLY before including) + 1.13 threadsafe + 1.12 const qualifiers in the API + 1.11 Support installable IDCT, colorspace conversion routines + 1.10 Fixes for 64-bit (don't use "unsigned long") + optimized upsampling by Fabian "ryg" Giesen + 1.09 Fix format-conversion for PSD code (bad global variables!) + 1.08 Thatcher Ulrich's PSD code integrated by Nicolas Schulz + 1.07 attempt to fix C++ warning/errors again + 1.06 attempt to fix C++ warning/errors again + 1.05 fix TGA loading to return correct *comp and use good luminance calc + 1.04 default float alpha is 1, not 255; use 'void *' for stbi_image_free + 1.03 bugfixes to STBI_NO_STDIO, STBI_NO_HDR + 1.02 support for (subset of) HDR files, float interface for preferred access to them + 1.01 fix bug: possible bug in handling right-side up bmps... not sure + fix bug: the stbi__bmp_load() and stbi__tga_load() functions didn't work at all + 1.00 interface to zlib that skips zlib header + 0.99 correct handling of alpha in palette + 0.98 TGA loader by lonesock; dynamically add loaders (untested) + 0.97 jpeg errors on too large a file; also catch another malloc failure + 0.96 fix detection of invalid v value - particleman@mollyrocket forum + 0.95 during header scan, seek to markers in case of padding + 0.94 STBI_NO_STDIO to disable stdio usage; rename all #defines the same + 0.93 handle jpegtran output; verbose errors + 0.92 read 4,8,16,24,32-bit BMP files of several formats + 0.91 output 24-bit Windows 3.0 BMP files + 0.90 fix a few more warnings; bump version number to approach 1.0 + 0.61 bugfixes due to Marc LeBlanc, Christopher Lloyd + 0.60 fix compiling as c++ + 0.59 fix warnings: merge Dave Moore's -Wall fixes + 0.58 fix bug: zlib uncompressed mode len/nlen was wrong endian + 0.57 fix bug: jpg last huffman symbol before marker was >9 bits but less than 16 available + 0.56 fix bug: zlib uncompressed mode len vs. nlen + 0.55 fix bug: restart_interval not initialized to 0 + 0.54 allow NULL for 'int *comp' + 0.53 fix bug in png 3->4; speedup png decoding + 0.52 png handles req_comp=3,4 directly; minor cleanup; jpeg comments + 0.51 obey req_comp requests, 1-component jpegs return as 1-component, + on 'test' only check type, not whether we support this variant + 0.50 (2006-11-19) + first released version +*/ + +/* +------------------------------------------------------------------------------ +This software is available under 2 licenses -- choose whichever you prefer. +------------------------------------------------------------------------------ +ALTERNATIVE A - MIT License +Copyright (c) 2017 Sean Barrett +Permission is hereby granted, free of charge, to any person obtaining a copy of +this software and associated documentation files (the "Software"), to deal in +the Software without restriction, including without limitation the rights to +use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies +of the Software, and to permit persons to whom the Software is furnished to do +so, subject to the following conditions: +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. +------------------------------------------------------------------------------ +ALTERNATIVE B - Public Domain (www.unlicense.org) +This is free and unencumbered software released into the public domain. +Anyone is free to copy, modify, publish, use, compile, sell, or distribute this +software, either in source code form or as a compiled binary, for any purpose, +commercial or non-commercial, and by any means. +In jurisdictions that recognize copyright laws, the author or authors of this +software dedicate any and all copyright interest in the software to the public +domain. We make this dedication for the benefit of the public at large and to +the detriment of our heirs and successors. We intend this dedication to be an +overt act of relinquishment in perpetuity of all present and future rights to +this software under copyright law. +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +------------------------------------------------------------------------------ +*/ diff --git a/llm/scripts/chat-13b.sh b/llm/scripts/chat-13b.sh new file mode 100755 index 00000000..5e46aafd --- /dev/null +++ b/llm/scripts/chat-13b.sh @@ -0,0 +1,2 @@ +# !/bin/bash +./chat LLaMA2_13B_chat INT4 5 diff --git a/llm/scripts/chat.sh b/llm/scripts/chat.sh new file mode 100755 index 00000000..e9b7b900 --- /dev/null +++ b/llm/scripts/chat.sh @@ -0,0 +1,2 @@ +# !/bin/bash +./chat LLaMA2_7B_chat INT4 5 diff --git a/llm/scripts/code.sh b/llm/scripts/code.sh new file mode 100755 index 00000000..07e336a4 --- /dev/null +++ b/llm/scripts/code.sh @@ -0,0 +1,2 @@ +# !/bin/bash +./chat CodeLLaMA_7B_Instruct INT4 5 diff --git a/llm/scripts/llava.sh b/llm/scripts/llava.sh new file mode 100755 index 00000000..e374698d --- /dev/null +++ b/llm/scripts/llava.sh @@ -0,0 +1,7 @@ +# !/bin/bash +echo "=============================================================================================================================" +image_path="$1" +termvisage $image_path -w 75 +echo "=============================================================================================================================" + +./chat LLaVA_7B INT4 5 $image_path diff --git a/llm/scripts/voice_llava.sh b/llm/scripts/voice_llava.sh new file mode 100755 index 00000000..803be634 --- /dev/null +++ b/llm/scripts/voice_llava.sh @@ -0,0 +1,7 @@ +# !/bin/bash +echo "=============================================================================================================================" +image_path="$1" +termvisage $image_path -w 75 +echo "=============================================================================================================================" + +./chat -v LLaVA_7B INT4 5 $image_path diff --git a/llm/scripts/voicechat.sh b/llm/scripts/voicechat.sh new file mode 100755 index 00000000..0c6fb0a4 --- /dev/null +++ b/llm/scripts/voicechat.sh @@ -0,0 +1,2 @@ +# !/bin/bash +./chat -v LLaMA2_7B_chat INT4 5 diff --git a/llm/src/nn_modules/Fp32CLIPAttention.cc b/llm/src/nn_modules/Fp32CLIPAttention.cc new file mode 100644 index 00000000..3d57b182 --- /dev/null +++ b/llm/src/nn_modules/Fp32CLIPAttention.cc @@ -0,0 +1,284 @@ +#include "Fp32CLIPAttention.h" + +#include +#include +#include + +#include "operators.h" +#include "utils.h" + +static float *attn_weights_arr; +static float ***key_states_arr_cache; +static float ***value_states_arr_cache; +static float *attn_output_fp_arr; +static int *cache_num; +static float *query_states_unshape_arr; +static float *attn_output_arr; +static float *attn_output_transpose_arr; +static float *key_states_unshape_arr; +static float *key_states_arr; +static float *value_states_unshape_arr; +static float *value_states_arr; +static float *query_states_arr; +static float *value_states_transpose_arr; + +struct transpose_1_2idx_float_arg { + int start_idx, end_idx; + Matrix3D input, output; +}; + +static void transpose_1_2idx_float_func(int start_idx, int end_idx, Matrix3D& input, Matrix3D& output) { + for (int i = 0; i < input.m_dim_x; i++) { + for (int j = 0; j < input.m_dim_y; j++) { + for (int k = start_idx; k < end_idx; k++) { + output.m_data[i * output.m_dim_y * output.m_dim_z + k * output.m_dim_z + j] = + input.m_data[i * input.m_dim_y * input.m_dim_z + j * input.m_dim_z + k]; + } + } + } +} + +inline void transpose_1_2idx_float_threads(Matrix3D &input, Matrix3D &output) { + PROFILE_START("Fp32CLIPAttention::transpose_1_2idx_float"); + assert(input.m_dim_x == output.m_dim_x); + assert(input.m_dim_y == output.m_dim_z); + assert(input.m_dim_z == output.m_dim_y); + + if (input.m_dim_y == 1 || input.m_dim_z == 1) { + memcpy(output.m_data, input.m_data, input.length() * sizeof(float)); + } else { + int num_thread = NUM_THREAD; + int loop_over_dim = input.m_dim_z; + if (num_thread > loop_over_dim) num_thread = loop_over_dim; + + std::thread thread_pool[NUM_THREAD]; + + // Thread creation + for (int j = 0; j < num_thread; j++) { + int start_idx = j * (loop_over_dim / num_thread); + int end_idx = (j == num_thread - 1) ? loop_over_dim : (j + 1) * (loop_over_dim / num_thread); + + thread_pool[j] = std::thread(transpose_1_2idx_float_func, start_idx, end_idx, std::ref(input), std::ref(output)); + } + // Join threads + for (int j = 0; j < num_thread; j++) { + thread_pool[j].join(); + } + } + + PROFILE_END("Fp32CLIPAttention::transpose_1_2idx_float"); +} + + +void Fp32CLIPAttention::initialized_memory(const struct model_config config) { + allocate_aligned_memory(attn_weights_arr, config.num_heads * config.max_sqlen * config.max_sqlen * sizeof(float)); + allocate_aligned_memory(attn_output_fp_arr, config.max_sqlen * config.embed_dim * sizeof(float)); + allocate_aligned_memory(attn_output_arr, config.max_sqlen * config.embed_dim * sizeof(float)); + allocate_aligned_memory(attn_output_transpose_arr, config.max_sqlen * config.embed_dim * sizeof(float)); + allocate_aligned_memory(key_states_unshape_arr, config.max_sqlen * config.embed_dim * sizeof(float)); + allocate_aligned_memory(key_states_arr, config.max_sqlen * config.embed_dim * sizeof(float)); + allocate_aligned_memory(value_states_unshape_arr, config.max_sqlen * config.embed_dim * sizeof(float)); + allocate_aligned_memory(value_states_arr, config.max_sqlen * config.embed_dim * sizeof(float)); + allocate_aligned_memory(query_states_arr, config.max_sqlen * config.embed_dim * sizeof(float)); + allocate_aligned_memory(value_states_transpose_arr, config.max_sqlen * config.embed_dim * sizeof(float)); + cache_num = new int[config.num_layers]; + for (int i = 0; i < config.num_layers; i++) cache_num[i] = 0; + allocate_aligned_memory(query_states_unshape_arr, config.max_sqlen * config.embed_dim * sizeof(float)); + key_states_arr_cache = new float **[config.num_layers]; + for (int i = 0; i < config.num_layers; ++i) { + key_states_arr_cache[i] = new float *[2]; + for (int j = 0; j < 2; ++j) { + allocate_aligned_memory(key_states_arr_cache[i][j], config.max_sqlen * config.embed_dim * sizeof(float)); + } + } + value_states_arr_cache = new float **[config.num_layers]; + for (int i = 0; i < config.num_layers; ++i) { + value_states_arr_cache[i] = new float *[2]; + for (int j = 0; j < 2; ++j) { + allocate_aligned_memory(value_states_arr_cache[i][j], config.max_sqlen * config.embed_dim * sizeof(float)); + } + } +} + +inline void Fp32CLIPAttention::shape(Matrix3D unshape, Matrix3D shaped, int sqlen) { + PROFILE_START("Fp32CLIPAttention::shape"); + assert(unshape.m_dim_x == 1); // bsz == 1 + assert(unshape.m_dim_y == sqlen); + assert(unshape.m_dim_z == this->num_heads * this->head_dim); + assert(shaped.m_dim_x == this->num_heads); + assert(shaped.m_dim_y == sqlen); + assert(shaped.m_dim_z == this->head_dim); + + for (int i = 0; i < this->num_heads; i++) { + for (int j = 0; j < sqlen; j++) { + for (int k = 0; k < this->head_dim; k++) { + shaped(i, j, k) = unshape(0, j, i * this->head_dim + k); + } + } + } + PROFILE_END("Fp32CLIPAttention::shape"); +} + +inline void Fp32CLIPAttention::unshape(Matrix3D shaped, Matrix3D unshape, int sqlen) { + PROFILE_START("Fp32CLIPAttention::unshpae"); + assert(unshape.m_dim_x == 1); // bsz == 1 + assert(unshape.m_dim_y == sqlen); + assert(unshape.m_dim_z == this->num_heads * this->head_dim); + assert(shaped.m_dim_x == this->num_heads); + assert(shaped.m_dim_y == sqlen); + assert(shaped.m_dim_z == this->head_dim); + + for (int i = 0; i < this->num_heads; i++) { + for (int j = 0; j < sqlen; j++) { + for (int k = 0; k < this->head_dim; k++) { + unshape(0, j, i * this->head_dim + k) = shaped(i, j, k); + } + } + } + PROFILE_END("Fp32CLIPAttention::unshpae"); +} + +Fp32CLIPAttention::Fp32CLIPAttention(std::string param_path, const struct model_config config) { + float *q_weight, *k_weight, *v_weight, *o_weight; + allocate_aligned_memory(q_weight, config.embed_dim * config.embed_dim * sizeof(float)); + allocate_aligned_memory(k_weight, config.embed_dim * config.embed_dim * sizeof(float)); + allocate_aligned_memory(v_weight, config.embed_dim * config.embed_dim * sizeof(float)); + allocate_aligned_memory(o_weight, config.embed_dim * config.embed_dim * sizeof(float)); + float *q_bias, *k_bias, *v_bias, *o_bias; + allocate_aligned_memory(q_bias, (config.embed_dim * sizeof(float))); + allocate_aligned_memory(k_bias, (config.embed_dim * sizeof(float))); + allocate_aligned_memory(v_bias, (config.embed_dim * sizeof(float))); + allocate_aligned_memory(o_bias, (config.embed_dim * sizeof(float))); + this->q_proj = + Linear_FP(Matrix3D(q_weight, 1, config.embed_dim, config.embed_dim), param_path + "/q_proj/weight.bin", + Matrix3D(q_bias, 1, 1, config.embed_dim), (param_path + "/q_proj/bias.bin")); + this->q_proj.has_bias = true; + this->k_proj = + Linear_FP(Matrix3D(k_weight, 1, config.embed_dim, config.embed_dim), param_path + "/k_proj/weight.bin", + Matrix3D(k_bias, 1, 1, config.embed_dim), (param_path + "/k_proj/bias.bin")); + this->k_proj.has_bias = true; + this->v_proj = + Linear_FP(Matrix3D(v_weight, 1, config.embed_dim, config.embed_dim), param_path + "/v_proj/weight.bin", + Matrix3D(v_bias, 1, 1, config.embed_dim), (param_path + "/v_proj/bias.bin")); + this->v_proj.has_bias = true; + this->out_proj = + Linear_FP(Matrix3D(o_weight, 1, config.embed_dim, config.embed_dim), param_path + "/out_proj/weight.bin", + Matrix3D(o_bias, 1, 1, config.embed_dim), (param_path + "/out_proj/bias.bin")); + this->out_proj.has_bias = true; + + float qk_bmm_alpha; + read_to_array((param_path + "/qk_bmm/alpha.bin").c_str(), &qk_bmm_alpha, 1); + this->qk_bmm = BMM_F32T(qk_bmm_alpha); + this->pv_bmm = BMM_F32T(1.0f); + + this->embed_dim = config.embed_dim; + this->num_heads = config.num_heads; + assert(config.embed_dim % config.num_heads == 0); + this->head_dim = config.embed_dim / config.num_heads; +} + +struct Fp32CLIPAttention_output Fp32CLIPAttention::forward(const struct Fp32CLIPAttention_input &input) { + PROFILE_START(profile_name); + struct Fp32CLIPAttention_output output; + const int sqlen = input.hidden_states.m_dim_y, b = input.hidden_states.m_dim_x; + assert(b == 1); + + // Query states + Matrix3D query_states_unshape(query_states_unshape_arr, b, sqlen, embed_dim); + this->q_proj.forward(input.hidden_states, query_states_unshape); + Matrix3D query_states(query_states_arr, this->num_heads, sqlen, this->head_dim); + this->shape(query_states_unshape, query_states, sqlen); + + // Get the memory buffer + float *ret_value_states, *ret_key_states; + if (cache_num[input.layer_idx] == 1) { + ret_value_states = value_states_arr_cache[input.layer_idx][1]; + ret_key_states = key_states_arr_cache[input.layer_idx][1]; + cache_num[input.layer_idx] = 0; + } else { + ret_value_states = value_states_arr_cache[input.layer_idx][0]; + ret_key_states = key_states_arr_cache[input.layer_idx][0]; + cache_num[input.layer_idx] = 1; + } + + // Key states + Matrix3D key_states_unshape(key_states_unshape_arr, b, sqlen, embed_dim); + this->k_proj.forward(input.hidden_states, key_states_unshape); + Matrix3D key_states(key_states_arr, this->num_heads, sqlen, this->head_dim); + this->shape(key_states_unshape, key_states, sqlen); + + // Value states + Matrix3D value_states_unshape(value_states_unshape_arr, b, sqlen, embed_dim); + this->v_proj.forward(input.hidden_states, value_states_unshape); + Matrix3D value_states(value_states_arr, this->num_heads, sqlen, this->head_dim); + this->shape(value_states_unshape, value_states, sqlen); + + // Concate with past key, value if exists + PROFILE_START(profile_name + "::cat_past_keys_values"); + int tgz = sqlen; + if (input.has_past_key_value) { + // # reuse k, v, self_attention + assert(input.past_key.m_dim_z == this->head_dim); + tgz += input.past_key.m_dim_y; + float *val_ptr = ret_value_states, *key_ptr = ret_key_states; + int past_block = input.past_key.m_dim_y * input.past_key.m_dim_z; + int sq_block = sqlen * this->head_dim; + for (int i = 0; i < input.past_key.m_dim_x; i++) { + memcpy(val_ptr, &input.past_value.m_data[past_block * i], past_block * sizeof(float)); + val_ptr += past_block; + memcpy(val_ptr, &value_states.m_data[sq_block * i], sq_block * sizeof(float)); + val_ptr += sq_block; + memcpy(key_ptr, &input.past_key.m_data[past_block * i], past_block * sizeof(float)); + key_ptr += past_block; + memcpy(key_ptr, &key_states.m_data[sq_block * i], sq_block * sizeof(float)); + key_ptr += sq_block; + } + } else { + // Put the data into the buffer + memcpy(ret_value_states, value_states_arr, (this->num_heads * tgz * this->head_dim) * sizeof(float)); + memcpy(ret_key_states, key_states_arr, (this->num_heads * tgz * this->head_dim) * sizeof(float)); + } + Matrix3D final_value_states(ret_value_states, this->num_heads, tgz, this->head_dim); + Matrix3D final_key_states(ret_key_states, this->num_heads, tgz, this->head_dim); + PROFILE_END(profile_name + "::cat_past_keys_values"); + + // QK_BMM + Matrix3D attn_weights(attn_weights_arr, this->num_heads, sqlen, tgz); + this->qk_bmm.forward(query_states, final_key_states, attn_weights); + + // // Add mask + // batch_Add(attn_weights, input.attention_mask, attn_weights); + // for (int i = 0; i < attn_weights.length(); i++) { + // if (std::isinf(attn_weights.m_data[i])) { + // attn_weights.m_data[i] = std::numeric_limits::lowest(); + // } + // } + + // Softmax QK + Matrix3D attn_probs(attn_weights_arr, this->num_heads, sqlen, tgz); + softmax(attn_weights, attn_probs, 2); + + // Legacy implementation + // Matrix3D value_states_transpose(value_states_transpose_arr, this->num_heads, this->head_dim, tgz); + // transpose_1_2idx_float_threads(final_value_states, value_states_transpose); + // Matrix3D attn_output(attn_output_arr, this->num_heads, sqlen, this->head_dim); + // this->pv_bmm.forward(attn_probs, value_states_transpose, attn_output); + + // PV_BMM: This implementation avoid additional data movement and is much faster + Matrix3D attn_output(attn_output_arr, this->num_heads, sqlen, this->head_dim); + this->pv_bmm.forward_weight_untransposed(attn_probs, final_value_states, attn_output); + + Matrix3D attn_output_transpose(attn_output_transpose_arr, 1, sqlen, this->num_heads * this->head_dim); + this->unshape(attn_output, attn_output_transpose, sqlen); + + // Output projection + Matrix3D attn_output_fp(attn_output_fp_arr, 1, sqlen, this->num_heads * this->head_dim); + this->out_proj.forward(attn_output_transpose, attn_output_fp); + + // Output assignment + output.attn_output = attn_output_fp; + output.past_key_value = {final_key_states, final_value_states}; + + PROFILE_END(profile_name); + return output; +} diff --git a/llm/src/nn_modules/Fp32CLIPEncoder.cc b/llm/src/nn_modules/Fp32CLIPEncoder.cc new file mode 100644 index 00000000..a5e68ff2 --- /dev/null +++ b/llm/src/nn_modules/Fp32CLIPEncoder.cc @@ -0,0 +1,47 @@ +#include "Fp32CLIPEncoder.h" +#include "utils.h" + +#include +#include + +Fp32CLIPEncoder::Fp32CLIPEncoder(std::string param_path, const struct model_config config) { + // Load all the encoder layers + for (int layer_idx = 0; layer_idx < config.num_layers; layer_idx++) { + DEBUG_INS(std::cout << "Start loading layer:" << layer_idx << "..." << std::endl;) + + std::string path = param_path + "/layer" + std::to_string(layer_idx); + Fp32CLIPEncoderLayer layer = Fp32CLIPEncoderLayer(path, config, layer_idx); + + this->layers.push_back(layer); + } +}; + +// Fp32CLIPEncoder +struct Fp32CLIPEncoder_output Fp32CLIPEncoder::forward(const struct Fp32CLIPEncoder_input &input) { + PROFILE_START(profile_name); + int sqlen = input.hidden_states.m_dim_y; + + // Go through each layer + Matrix3D hidden_states = input.hidden_states; + std::vector> past_keys, past_values; + for (int i = 0; i < this->layers.size(); i++) { + if (!input.has_past_keys_values) { + struct Fp32CLIPEncoderLayer_input l_i = {hidden_states, input.attention_mask}; + struct Fp32CLIPEncoderLayer_output l_o = this->layers[i].forward(l_i); + hidden_states = l_o.hidden_states; + past_keys.push_back(l_o.past_key_value.first); + past_values.push_back(l_o.past_key_value.second); + } else { + struct Fp32CLIPEncoderLayer_input l_i = {hidden_states, input.attention_mask, input.past_keys[i], + input.past_values[i]}; + struct Fp32CLIPEncoderLayer_output l_o = this->layers[i].forward(l_i); + hidden_states = l_o.hidden_states; + past_keys.push_back(l_o.past_key_value.first); + past_values.push_back(l_o.past_key_value.second); + } + } + + struct Fp32CLIPEncoder_output output = {hidden_states, past_keys, past_values}; + PROFILE_END(profile_name); + return output; +} diff --git a/llm/src/nn_modules/Fp32CLIPEncoderLayer.cc b/llm/src/nn_modules/Fp32CLIPEncoderLayer.cc new file mode 100644 index 00000000..b9666f40 --- /dev/null +++ b/llm/src/nn_modules/Fp32CLIPEncoderLayer.cc @@ -0,0 +1,119 @@ +#include "Fp32CLIPEncoderLayer.h" +#include "utils.h" + +template +void add(Matrix3D a, Matrix3D b, Matrix3D c) { + PROFILE_START("Fp32CLIPEncoderLayer::add"); + assert(c.length() == a.length() && a.length() == b.length()); + + for (int i = 0; i < a.length(); i++) { + c.m_data[i] = a.m_data[i] + b.m_data[i]; + } + PROFILE_END("Fp32CLIPEncoderLayer::add"); +} + +// Shared memory space across all layers +static float *hidden_states_float_arr; +static float *final_layer_norm_arr; +static float *mlp_fc1_arr; +static float *mlp_fc2_arr; +static float *temp; +static float *hidden_states_arr; + +Fp32CLIPEncoderLayer::Fp32CLIPEncoderLayer(std::string param_path, const struct model_config config, int layer_idx) { + if (layer_idx == 0) { + allocate_aligned_memory(hidden_states_float_arr, config.max_sqlen * config.embed_dim * sizeof(float)); + allocate_aligned_memory(final_layer_norm_arr, config.max_sqlen * config.embed_dim * sizeof(float)); + allocate_aligned_memory(mlp_fc1_arr, config.max_sqlen * config.hidden_dim * sizeof(float)); + allocate_aligned_memory(mlp_fc2_arr, config.max_sqlen * config.embed_dim * sizeof(float)); + allocate_aligned_memory(hidden_states_arr, config.max_sqlen * config.embed_dim * sizeof(float)); + Fp32CLIPAttention::initialized_memory(config); + } + + struct LayerNorm_params layer_norm1, layer_norm2; + float *layer_norm1_weight_buf, *layer_norm1_bias_buf; + allocate_aligned_memory(layer_norm1_weight_buf, config.embed_dim * sizeof(float)); + allocate_aligned_memory(layer_norm1_bias_buf, config.embed_dim * sizeof(float)); + Matrix3D layer_norm1_weight(layer_norm1_weight_buf, 1, 1, config.embed_dim); + Matrix3D layer_norm1_bias(layer_norm1_bias_buf, 1, 1, config.embed_dim); + layer_norm1.weight = layer_norm1_weight; + layer_norm1.bias = layer_norm1_bias; + float *layer_norm2_weight_buf, *layer_norm2_bias_buf; + allocate_aligned_memory(layer_norm2_weight_buf, config.embed_dim * sizeof(float)); + allocate_aligned_memory(layer_norm2_bias_buf, config.embed_dim * sizeof(float)); + Matrix3D layer_norm2_weight(layer_norm2_weight_buf, 1, 1, config.embed_dim); + Matrix3D layer_norm2_bias(layer_norm2_bias_buf, 1, 1, config.embed_dim); + layer_norm2.weight = layer_norm2_weight; + layer_norm2.bias = layer_norm2_bias; + + this->layer_norm1 = LayerNorm(layer_norm1); + load_LayerNorm(this->layer_norm1, param_path + "/layer_norm1"); + this->layer_norm2 = LayerNorm(layer_norm2); + load_LayerNorm(this->layer_norm2, param_path + "/layer_norm2"); + + this->embed_dim = config.embed_dim; + this->num_attention_heads = config.num_heads; + this->hidden_dim = config.hidden_dim; + this->layer_idx = layer_idx; + + this->attn = Fp32CLIPAttention(param_path + "/self_attn", config); + + float *mlp_fc1_weight, *mlp_fc2_weight; + allocate_aligned_memory(mlp_fc1_weight, config.embed_dim * config.hidden_dim * sizeof(float)); + allocate_aligned_memory(mlp_fc2_weight, config.hidden_dim * config.embed_dim * sizeof(float)); + float *mlp_fc1_bias, *mlp_fc2_bias; + allocate_aligned_memory(mlp_fc1_bias, (config.hidden_dim * sizeof(float))); + allocate_aligned_memory(mlp_fc2_bias, (config.embed_dim * sizeof(float))); + this->mlp_fc1 = + Linear_FP(Matrix3D(mlp_fc1_weight, 1, config.hidden_dim, config.embed_dim), param_path + "/mlp_fc1/weight.bin", + Matrix3D(mlp_fc1_bias, 1, 1, config.hidden_dim), (param_path + "/mlp_fc1/bias.bin")); + this->mlp_fc1.has_bias = true; + this->mlp_fc2 = + Linear_FP(Matrix3D(mlp_fc2_weight, 1, config.embed_dim, config.hidden_dim), param_path + "/mlp_fc2/weight.bin", + Matrix3D(mlp_fc2_bias, 1, 1, config.embed_dim), (param_path + "/mlp_fc2/bias.bin")); + this->mlp_fc2.has_bias = true; +} + +struct Fp32CLIPEncoderLayer_output Fp32CLIPEncoderLayer::forward(const struct Fp32CLIPEncoderLayer_input &input) { + PROFILE_START(profile_name); + + // Layernorm 1 + Matrix3D hidden_states(hidden_states_arr, input.hidden_states.m_dim_x, input.hidden_states.m_dim_y, + input.hidden_states.m_dim_z); + this->layer_norm1.forward(input.hidden_states, hidden_states); + + // Attention + struct Fp32CLIPAttention_input attn_param(hidden_states, input.attention_mask, input.past_key, input.past_value, + input.has_past_key_value, this->layer_idx); + struct Fp32CLIPAttention_output attn_output = this->attn.forward(attn_param); + + // Residual add + Matrix3D residual_add(hidden_states_float_arr, input.hidden_states.m_dim_x, input.hidden_states.m_dim_y, + input.hidden_states.m_dim_z); + add(input.hidden_states, attn_output.attn_output, residual_add); + + // Layernorm 2 + Matrix3D post_attention_layernorm(final_layer_norm_arr, input.hidden_states.m_dim_x, + input.hidden_states.m_dim_y, input.hidden_states.m_dim_z); + this->layer_norm2.forward(residual_add, post_attention_layernorm); + + // mlp_fc1: embed_dim -> hidden_dim + Matrix3D mlp_fc1(mlp_fc1_arr, input.hidden_states.m_dim_x, input.hidden_states.m_dim_y, + this->hidden_dim); + this->mlp_fc1.forward(post_attention_layernorm, mlp_fc1); + + // Quick GELU + Gelu_quick(mlp_fc1); + + // mlp_fc2: hidden_dim -> embed_dim + Matrix3D mlp_fc2(mlp_fc2_arr, input.hidden_states.m_dim_x, input.hidden_states.m_dim_y, this->embed_dim); + this->mlp_fc2.forward(mlp_fc1, mlp_fc2); + + // Residual add + add(residual_add, mlp_fc2, residual_add); + + struct Fp32CLIPEncoderLayer_output output(residual_add, attn_output.attn_probs_reshaped, + attn_output.past_key_value); + PROFILE_END(profile_name); + return output; +} diff --git a/llm/src/nn_modules/Fp32CLIPVisionTransformer.cc b/llm/src/nn_modules/Fp32CLIPVisionTransformer.cc new file mode 100644 index 00000000..4b52ac6a --- /dev/null +++ b/llm/src/nn_modules/Fp32CLIPVisionTransformer.cc @@ -0,0 +1,147 @@ +#include "Fp32CLIPVisionTransformer.h" +#include "utils.h" + +#include +#include + +Fp32CLIPVisionTransformer::Fp32CLIPVisionTransformer(std::string param_path, const struct model_config config) { + allocate_aligned_memory(patch_embeds_buf, 24 * 24 * config.embed_dim * sizeof(float)); // TODO + allocate_aligned_memory(class_embeds_buf, config.embed_dim * sizeof(float)); + allocate_aligned_memory(pos_embeds_buf, 577 * config.embed_dim * sizeof(float)); + allocate_aligned_memory(last_hidden_states_buf, 576 * config.embed_dim * sizeof(float)); + allocate_aligned_memory(hidden_states_buf, 577 * config.embed_dim * sizeof(float)); + allocate_aligned_memory(embeddings_buf, 577 * config.embed_dim * sizeof(float)); + allocate_aligned_memory(mm_proj_0_arr, 576 * config.hidden_dim * sizeof(float)); + allocate_aligned_memory(mm_proj_2_arr, 576 * config.hidden_dim * sizeof(float)); + + this->encoder = Fp32CLIPEncoder(param_path + "/encoder", config); + + this->voc_size = config.vocsize; + this->embed_dim = config.embed_dim; + this->hidden_dim = config.hidden_dim; + this->num_heads = config.num_heads; + this->padding_idx = config.padding_idx; + int max_sqlen = config.max_sqlen; + + // Class Embedding + read_to_array((param_path + "/embeddings/class_embedding/weight.bin").c_str(), class_embeds_buf, config.embed_dim); + // Patch Embedding + struct Conv2D_params embed_patch; + float *patch_weight_buf; + allocate_aligned_memory(patch_weight_buf, 14 * 14 * 3 * 1024 * sizeof(float)); + Matrix4D patch_weight(patch_weight_buf, 3, 14, 14, 1024); // TODO + embed_patch.weight = patch_weight; + embed_patch.stride_width = 14; + embed_patch.stride_height = 14; + this->embed_patch = Conv2D(embed_patch); + load_Conv2D(this->embed_patch, param_path + "/embeddings/patch_embedding"); + // Position Embedding + float *posweight_buf; + allocate_aligned_memory(posweight_buf, 1024 * 577 * sizeof(float)); + Matrix3D posweight(posweight_buf, 1, 577, 1024); // TODO: num_positions + this->embed_positions = Embedding(1024, 577, padding_idx, posweight); // TODO: num_positions + load_Embedding_params(this->embed_positions, param_path + "/embeddings/position_embedding"); + + // LayerNorm + struct LayerNorm_params pre_layernorm; + float *pre_layernorm_weight_buf, *pre_layernorm_bias_buf; + allocate_aligned_memory(pre_layernorm_weight_buf, config.embed_dim * sizeof(float)); + allocate_aligned_memory(pre_layernorm_bias_buf, config.embed_dim * sizeof(float)); + Matrix3D pre_layernorm_weight(pre_layernorm_weight_buf, 1, 1, config.embed_dim); + Matrix3D pre_layernorm_bias(pre_layernorm_bias_buf, 1, 1, config.embed_dim); + pre_layernorm.weight = pre_layernorm_weight; + pre_layernorm.bias = pre_layernorm_bias; + this->pre_layernorm = LayerNorm(pre_layernorm); + load_LayerNorm(this->pre_layernorm, param_path + "/pre_layernorm"); + + // Projection + float *mm_proj_0_weight, *mm_proj_2_weight; + allocate_aligned_memory(mm_proj_0_weight, config.embed_dim * config.hidden_dim * sizeof(float)); + allocate_aligned_memory(mm_proj_2_weight, config.hidden_dim * config.hidden_dim * sizeof(float)); + float *mm_proj_0_bias, *mm_proj_2_bias; + allocate_aligned_memory(mm_proj_0_bias, (config.hidden_dim * sizeof(float))); + allocate_aligned_memory(mm_proj_2_bias, (config.hidden_dim * sizeof(float))); + this->mm_proj_0 = + Linear_FP(Matrix3D(mm_proj_0_weight, 1, config.hidden_dim, config.embed_dim), param_path + "/mm_projector_0/weight.bin", + Matrix3D(mm_proj_0_bias, 1, 1, config.hidden_dim), (param_path + "/mm_projector_0/bias.bin")); + this->mm_proj_0.has_bias = true; + + this->mm_proj_2 = + Linear_FP(Matrix3D(mm_proj_2_weight, 1, config.hidden_dim, config.hidden_dim), param_path + "/mm_projector_2/weight.bin", + Matrix3D(mm_proj_2_bias, 1, 1, config.hidden_dim), (param_path + "/mm_projector_2/bias.bin")); + this->mm_proj_2.has_bias = true; +}; + +// Fp32CLIPVisionTransformer: +struct Fp32CLIPVisionTransformer_output Fp32CLIPVisionTransformer::forward(const struct Fp32CLIPVisionTransformer_input &input) { + PROFILE_START(profile_name); + int sqlen = input.input_image.m_dim_z, batch_size = input.input_image.m_dim_x, past_key_values_length = 0; + + if (input.has_past_keys_values) { + past_key_values_length = input.past_keys[0].m_dim_y; + } + + // Attention mask: NULL + Matrix3D causal_attention_mask; + + // Input image + Matrix3D input_image(input.input_image.m_data, input.input_image.m_dim_x, input.input_image.m_dim_y, + input.input_image.m_dim_z); + + // Patch embeddings + Matrix3D patch_embeds(patch_embeds_buf, this->embed_dim, 24, 24); // TODO + this->embed_patch.forward(input_image, patch_embeds); + // Class embeddings + Matrix3D embeddings(embeddings_buf, 1, 577, this->embed_dim); + Matrix3D class_embeds(class_embeds_buf, 1, 1, this->embed_dim); + // Concate class embeddings with patch embeddings into embeddings + memcpy(embeddings.m_data, class_embeds.m_data, class_embeds.length() * sizeof(float)); + memcpy(embeddings.m_data + class_embeds.length(), patch_embeds.m_data, patch_embeds.length() * sizeof(float)); + // Position embeddings + int position_ids_buf[577]; + Matrix3D position_ids(position_ids_buf, 1, 1, 577); + for (int i = 0; i < 577; i++) position_ids.m_data[i] = i + past_key_values_length; + Matrix3D pos_embeds(pos_embeds_buf, 1, 577, this->embed_dim); + this->embed_positions.forward(position_ids, pos_embeds); + + assert(embeddings.m_dim_x == pos_embeds.m_dim_x); + assert(embeddings.m_dim_y == pos_embeds.m_dim_y); + assert(embeddings.m_dim_z == pos_embeds.m_dim_z); + for (int i = 0; i < embeddings.length(); i++) { + embeddings.m_data[i] = embeddings.m_data[i] + pos_embeds.m_data[i]; + } + + // Pre-Layernorm + Matrix3D hidden_states(hidden_states_buf, 1, 577, this->embed_dim); + this->pre_layernorm.forward(embeddings, hidden_states); + + // CLIP Encoder + struct Fp32CLIPEncoder_output encoder_output; + if (input.has_past_keys_values) { + struct Fp32CLIPEncoder_input encoder_input = {hidden_states, causal_attention_mask, input.past_keys, input.past_values}; + encoder_output = this->encoder.forward(encoder_input); + } else { + struct Fp32CLIPEncoder_input encoder_input = {hidden_states, causal_attention_mask}; + encoder_output = this->encoder.forward(encoder_input); + } + + Matrix3D last_hidden_states(last_hidden_states_buf, 1, 576, this->embed_dim); + // Copy encoder_output.last_hidden_state[1:] to last_hidden_states + memcpy(last_hidden_states.m_data, encoder_output.last_hidden_state.m_data + this->embed_dim, + last_hidden_states.length() * sizeof(float)); + + // LLaVA Projector + Matrix3D mm_proj_0(mm_proj_0_arr, last_hidden_states.m_dim_x, last_hidden_states.m_dim_y, + this->hidden_dim); + this->mm_proj_0.forward(last_hidden_states, mm_proj_0); + + // GELU + Gelu(mm_proj_0); + + Matrix3D mm_proj_2(mm_proj_2_arr, last_hidden_states.m_dim_x, last_hidden_states.m_dim_y, this->hidden_dim); + this->mm_proj_2.forward(mm_proj_0, mm_proj_2); + + struct Fp32CLIPVisionTransformer_output output = {mm_proj_2, encoder_output.past_keys, encoder_output.past_values}; + PROFILE_END(profile_name); + return output; +} diff --git a/llm/src/nn_modules/Fp32GPTBigCodeDecoderLayer.cc b/llm/src/nn_modules/Fp32GPTBigCodeDecoderLayer.cc index 8a9339ad..6e36f3af 100644 --- a/llm/src/nn_modules/Fp32GPTBigCodeDecoderLayer.cc +++ b/llm/src/nn_modules/Fp32GPTBigCodeDecoderLayer.cc @@ -21,18 +21,18 @@ void add(Matrix3D a, Matrix3D b, Matrix3D c) { PROFILE_END("Fp32GPTBigCodeDecoderLayer::add"); } -static const float GELU_COEF_A = 0.044715f; -static const float SQRT_2_OVER_PI = 0.79788456080286535587989211986876f; -inline static float Gelu_imp(float x) { - return 0.5f * x * (1.0f + tanhf(SQRT_2_OVER_PI * x * (1.0f + GELU_COEF_A * x * x))); -} -inline static void Gelu(Matrix3D a) { - PROFILE_START("Fp32GPTBigCodeDecoderLayer::Gelu"); - for (int i = 0; i < a.length(); i++) { - a.m_data[i] = Gelu_imp(a.m_data[i]); - } - PROFILE_END("Fp32GPTBigCodeDecoderLayer::Gelu"); -} +// static const float GELU_COEF_A = 0.044715f; +// static const float SQRT_2_OVER_PI = 0.79788456080286535587989211986876f; +// inline static float Gelu_imp(float x) { +// return 0.5f * x * (1.0f + tanhf(SQRT_2_OVER_PI * x * (1.0f + GELU_COEF_A * x * x))); +// } +// inline static void Gelu(Matrix3D a) { +// PROFILE_START("Fp32GPTBigCodeDecoderLayer::Gelu"); +// for (int i = 0; i < a.length(); i++) { +// a.m_data[i] = Gelu_imp(a.m_data[i]); +// } +// PROFILE_END("Fp32GPTBigCodeDecoderLayer::Gelu"); +// } struct Fp32GPTBigCodeDecoderLayer_output Fp32GPTBigCodeDecoderLayer::forward(const struct Fp32GPTBigCodeDecoderLayer_input &input) { PROFILE_START(profile_name); diff --git a/llm/src/nn_modules/Fp32llamaDecoder.cc b/llm/src/nn_modules/Fp32llamaDecoder.cc index 18d0b1c0..5b35102e 100644 --- a/llm/src/nn_modules/Fp32llamaDecoder.cc +++ b/llm/src/nn_modules/Fp32llamaDecoder.cc @@ -29,6 +29,10 @@ Fp32llamaDecoder::Fp32llamaDecoder(std::string param_path, const struct model_co allocate_aligned_memory(pos_embeds_buf, config.max_sqlen * config.embed_dim * sizeof(float)); allocate_aligned_memory(last_hidden_states_buf, config.max_sqlen * config.embed_dim * sizeof(float)); allocate_aligned_memory(hidden_states_buf, config.max_sqlen * config.embed_dim * sizeof(float)); + allocate_aligned_memory(inputs_embeds_buf, config.max_sqlen * config.embed_dim * sizeof(float)); + allocate_aligned_memory(first_input_ids_buf, 50 * config.embed_dim * sizeof(float)); + allocate_aligned_memory(image_embed_buf, 576 * config.embed_dim * sizeof(float)); + allocate_aligned_memory(second_input_ids_buf, (config.max_sqlen-626) * config.embed_dim * sizeof(float)); this->voc_size = config.vocsize; this->embed_dim = config.embed_dim; @@ -63,17 +67,38 @@ Fp32llamaDecoder::Fp32llamaDecoder(std::string param_path, const struct model_co // Fp32llamaDecoder: struct Fp32llamaDecoder_output Fp32llamaDecoder::forward(const struct Fp32llamaDecoder_input &input) { PROFILE_START(profile_name); - int sqlen = input.input_ids.m_dim_z, batch_size = input.input_ids.m_dim_x, past_key_values_length = 0; + int batch_size = input.input_ids.m_dim_x, past_key_values_length = 0; + int sqlen; + if (input.is_llava) { + sqlen = input.input_ids.m_dim_z + input.image_embed.m_dim_y; + } else { + sqlen = input.input_ids.m_dim_z; + } // Input token -> Embedding -#ifdef _WIN32 - std::vector inputs_embeds_buf_vec(sqlen * this->embed_dim); - float *inputs_embeds_buf = &inputs_embeds_buf_vec.front(); -#else - float inputs_embeds_buf[sqlen * this->embed_dim]; -#endif +// #ifdef _WIN32 +// std::vector inputs_embeds_buf_vec(sqlen * this->embed_dim); +// float *inputs_embeds_buf = &inputs_embeds_buf_vec.front(); +// #else +// float inputs_embeds_buf[sqlen * this->embed_dim]; +// #endif Matrix3D inputs_embeds(inputs_embeds_buf, 1, sqlen, this->embed_dim); - this->embed_tokens.forward(input.input_ids, inputs_embeds); + + if (input.is_llava) { + int first_input_ids_size = input.input_ids.m_dim_z; + int image_embed_size = input.image_embed.m_dim_y; + Matrix3D first_input_embeds(first_input_ids_buf, 1, first_input_ids_size, this->embed_dim); + Matrix3D image_embeds(image_embed_buf, 1, image_embed_size, this->embed_dim); + + this->embed_tokens.forward(input.input_ids, first_input_embeds); + memcpy(image_embed_buf, input.image_embed.m_data, image_embed_size * this->embed_dim * sizeof(float)); + + memcpy(inputs_embeds_buf, first_input_ids_buf, first_input_ids_size * this->embed_dim * sizeof(float)); + memcpy(inputs_embeds_buf + first_input_ids_size * this->embed_dim, image_embed_buf, + image_embed_size * this->embed_dim * sizeof(float)); + } else { + this->embed_tokens.forward(input.input_ids, inputs_embeds); + } if (input.has_past_keys_values) { past_key_values_length = input.past_keys[0].m_dim_y; diff --git a/llm/src/nn_modules/Fp32llamaForCausalLM.cc b/llm/src/nn_modules/Fp32llamaForCausalLM.cc index 7abf7a00..42b5d09c 100644 --- a/llm/src/nn_modules/Fp32llamaForCausalLM.cc +++ b/llm/src/nn_modules/Fp32llamaForCausalLM.cc @@ -16,7 +16,6 @@ Fp32LlamaForCausalLM::Fp32LlamaForCausalLM(std::string param_path, const struct struct Fp32LlamaForCausalLM_output Fp32LlamaForCausalLM::forward(const struct Fp32LlamaForCausalLM_input &input) { PROFILE_START(profile_name); - int sqlen = input.input_ids.m_dim_z; struct Fp32llamaDecoder_output decoder_output; @@ -24,13 +23,27 @@ struct Fp32LlamaForCausalLM_output Fp32LlamaForCausalLM::forward(const struct Fp if (input.has_past_keys_values) { struct Fp32llamaDecoder_input decoder_input = {input.input_ids, input.past_keys, input.past_values}; decoder_output = this->decoder.forward(decoder_input); - } else { - struct Fp32llamaDecoder_input decoder_input = {input.input_ids}; + struct Fp32llamaDecoder_input decoder_input; + if (input.is_llava) { + decoder_input = {input.input_ids, input.image_embed}; + decoder_input.has_past_keys_values = false; + decoder_input.is_llava = true; + } else { + decoder_input = {input.input_ids}; + decoder_input.has_past_keys_values = false; + decoder_input.is_llava = false; + } decoder_output = this->decoder.forward(decoder_input); } // Get logits + int sqlen; + if (input.is_llava) { + sqlen = input.input_ids.m_dim_z + input.image_embed.m_dim_y; + } else { + sqlen = input.input_ids.m_dim_z; + } Matrix3D logits(logits_output, 1, sqlen, this->decoder.voc_size); this->lm_head.forward(decoder_output.last_hidden_state, logits); diff --git a/llm/src/nn_modules/Int4GPTBigCodeDecoderLayer.cc b/llm/src/nn_modules/Int4GPTBigCodeDecoderLayer.cc index c7a77d19..bf1656b8 100644 --- a/llm/src/nn_modules/Int4GPTBigCodeDecoderLayer.cc +++ b/llm/src/nn_modules/Int4GPTBigCodeDecoderLayer.cc @@ -21,18 +21,18 @@ void add(Matrix3D a, Matrix3D b, Matrix3D c) { PROFILE_END("Int4GPTBigCodeDecoderLayer::add"); } -static const float GELU_COEF_A = 0.044715f; -static const float SQRT_2_OVER_PI = 0.79788456080286535587989211986876f; -inline static float Gelu_imp(float x) { - return 0.5f * x * (1.0f + tanhf(SQRT_2_OVER_PI * x * (1.0f + GELU_COEF_A * x * x))); -} -inline static void Gelu(Matrix3D a) { - PROFILE_START("Int4GPTBigCodeDecoderLayer::Gelu"); - for (int i = 0; i < a.length(); i++) { - a.m_data[i] = Gelu_imp(a.m_data[i]); - } - PROFILE_END("Int4GPTBigCodeDecoderLayer::Gelu"); -} +// static const float GELU_COEF_A = 0.044715f; +// static const float SQRT_2_OVER_PI = 0.79788456080286535587989211986876f; +// inline static float Gelu_imp(float x) { +// return 0.5f * x * (1.0f + tanhf(SQRT_2_OVER_PI * x * (1.0f + GELU_COEF_A * x * x))); +// } +// inline static void Gelu(Matrix3D a) { +// PROFILE_START("Int4GPTBigCodeDecoderLayer::Gelu"); +// for (int i = 0; i < a.length(); i++) { +// a.m_data[i] = Gelu_imp(a.m_data[i]); +// } +// PROFILE_END("Int4GPTBigCodeDecoderLayer::Gelu"); +// } Int4GPTBigCodeDecoderLayer::Int4GPTBigCodeDecoderLayer(std::string param_path, const model_config config, int layer_idx) { if (layer_idx == 0) { diff --git a/llm/src/nn_modules/non_cuda/Int4llamaDecoder.cc b/llm/src/nn_modules/non_cuda/Int4llamaDecoder.cc index 8f481a47..88d479b7 100644 --- a/llm/src/nn_modules/non_cuda/Int4llamaDecoder.cc +++ b/llm/src/nn_modules/non_cuda/Int4llamaDecoder.cc @@ -29,6 +29,10 @@ Int4llamaDecoder::Int4llamaDecoder(std::string param_path, const struct model_co allocate_aligned_memory(pos_embeds_buf, config.max_sqlen * config.embed_dim * sizeof(float)); allocate_aligned_memory(last_hidden_states_buf, config.max_sqlen * config.embed_dim * sizeof(float)); allocate_aligned_memory(hidden_states_buf, config.max_sqlen * config.embed_dim * sizeof(float)); + allocate_aligned_memory(inputs_embeds_buf, config.max_sqlen * config.embed_dim * sizeof(float)); + allocate_aligned_memory(first_input_ids_buf, 50 * config.embed_dim * sizeof(float)); + allocate_aligned_memory(image_embed_buf, 576 * config.embed_dim * sizeof(float)); + allocate_aligned_memory(second_input_ids_buf, (config.max_sqlen-626) * config.embed_dim * sizeof(float)); this->voc_size = config.vocsize; this->embed_dim = config.embed_dim; @@ -63,12 +67,32 @@ Int4llamaDecoder::Int4llamaDecoder(std::string param_path, const struct model_co // Int4llamaDecoder: struct Int4llamaDecoder_output Int4llamaDecoder::forward(std::string param_path, const struct Int4llamaDecoder_input &input) { PROFILE_START(profile_name); - int sqlen = input.input_ids.m_dim_z, batch_size = input.input_ids.m_dim_x, past_key_values_length = 0; + int batch_size = input.input_ids.m_dim_x, past_key_values_length = 0; + int sqlen; + if (input.is_llava) { + sqlen = input.input_ids.m_dim_z + input.image_embed.m_dim_y; + } else { + sqlen = input.input_ids.m_dim_z; + } // Input token -> Embedding - float inputs_embeds_buf[sqlen * this->embed_dim]; Matrix3D inputs_embeds(inputs_embeds_buf, 1, sqlen, this->embed_dim); - this->embed_tokens.forward(input.input_ids, inputs_embeds); + + if (input.is_llava) { + int first_input_ids_size = input.input_ids.m_dim_z; + int image_embed_size = input.image_embed.m_dim_y; + Matrix3D first_input_embeds(first_input_ids_buf, 1, first_input_ids_size, this->embed_dim); + Matrix3D image_embeds(image_embed_buf, 1, image_embed_size, this->embed_dim); + + this->embed_tokens.forward(input.input_ids, first_input_embeds); + memcpy(image_embed_buf, input.image_embed.m_data, image_embed_size * this->embed_dim * sizeof(float)); + + memcpy(inputs_embeds_buf, first_input_ids_buf, first_input_ids_size * this->embed_dim * sizeof(float)); + memcpy(inputs_embeds_buf + first_input_ids_size * this->embed_dim, image_embed_buf, + image_embed_size * this->embed_dim * sizeof(float)); + } else { + this->embed_tokens.forward(input.input_ids, inputs_embeds); + } if (input.has_past_keys_values) { past_key_values_length = input.past_keys[0].m_dim_y; @@ -77,13 +101,11 @@ struct Int4llamaDecoder_output Int4llamaDecoder::forward(std::string param_path, // Attention mask Matrix3D causal_attention_mask = this->prepare_decoder_attention_mask(sqlen + past_key_values_length, past_key_values_length); - // Go through each layer Matrix3D hidden_states = inputs_embeds; std::vector> past_keys, past_values; for (int i = 0; i < this->layers.size(); i++) { std::string path = param_path + "/layer" + std::to_string(i); - if (!input.has_past_keys_values) { struct Int4llamaDecoderLayer_input l_i = {hidden_states, causal_attention_mask}; struct Int4llamaDecoderLayer_output l_o = this->layers[i].forward(path, l_i, i); @@ -103,7 +125,6 @@ struct Int4llamaDecoder_output Int4llamaDecoder::forward(std::string param_path, // Layernorm Matrix3D last_hidden_states(last_hidden_states_buf, 1, sqlen, this->embed_dim); this->norm.forward(hidden_states, last_hidden_states, rms_norm_eps); - struct Int4llamaDecoder_output output = {last_hidden_states, past_keys, past_values}; PROFILE_END(profile_name); return output; diff --git a/llm/src/nn_modules/non_cuda/Int4llamaForCausalLM.cc b/llm/src/nn_modules/non_cuda/Int4llamaForCausalLM.cc index 1b6d819e..d0edca9c 100644 --- a/llm/src/nn_modules/non_cuda/Int4llamaForCausalLM.cc +++ b/llm/src/nn_modules/non_cuda/Int4llamaForCausalLM.cc @@ -16,7 +16,6 @@ Int4LlamaForCausalLM::Int4LlamaForCausalLM(std::string param_path, const struct struct Int4LlamaForCausalLM_output Int4LlamaForCausalLM::forward(std::string param_path, const struct Int4LlamaForCausalLM_input &input) { PROFILE_START(profile_name); - int sqlen = input.input_ids.m_dim_z; struct Int4llamaDecoder_output decoder_output; @@ -24,13 +23,28 @@ struct Int4LlamaForCausalLM_output Int4LlamaForCausalLM::forward(std::string par if (input.has_past_keys_values) { struct Int4llamaDecoder_input decoder_input = {input.input_ids, input.past_keys, input.past_values}; decoder_output = this->decoder.forward(param_path + "/decoder", decoder_input); - } else { - struct Int4llamaDecoder_input decoder_input = {input.input_ids}; + struct Int4llamaDecoder_input decoder_input; + if (input.is_llava) { + decoder_input = {input.input_ids, input.image_embed}; + decoder_input.has_past_keys_values = false; + decoder_input.is_llava = true; + } else { + decoder_input = {input.input_ids}; + decoder_input.has_past_keys_values = false; + decoder_input.is_llava = false; + } decoder_output = this->decoder.forward(param_path + "/decoder", decoder_input); } // Get logits + int sqlen; + if (input.is_llava) { + sqlen = input.input_ids.m_dim_z + input.image_embed.m_dim_y + input.second_input_ids.m_dim_z; + sqlen = input.input_ids.m_dim_z + input.image_embed.m_dim_y; + } else { + sqlen = input.input_ids.m_dim_z; + } Matrix3D logits(logits_output, 1, sqlen, this->decoder.voc_size); PROFILE_START("Int4LlamaForCausalLM::lm_head"); this->lm_head.forward(decoder_output.last_hidden_state, logits); diff --git a/llm/src/nn_modules/non_cuda/LLaVAGenerate.cc b/llm/src/nn_modules/non_cuda/LLaVAGenerate.cc new file mode 100644 index 00000000..00253509 --- /dev/null +++ b/llm/src/nn_modules/non_cuda/LLaVAGenerate.cc @@ -0,0 +1,580 @@ + +#include "Generate.h" +#include "LLaMATokenizer.h" +#include "common.h" +#include "utils.h" +#include +#include +#include + +#define STB_IMAGE_IMPLEMENTATION +#include "stb_image.h" + + +struct clip_model_config { + int image_size = 336; + int patch_size = 14; + int num_patches = (image_size / patch_size) * (image_size / patch_size); + int num_positions = num_patches + 1; + int projection_dim = 768; + int mmproj_dim = 4096; + // float image_mean[3] = {0.48145466f, 0.4578275f, 0.40821073f}; + // float image_std[3] = {0.26862954f, 0.26130258f, 0.27577711f}; + float image_mean[3] = {0.48145466f, 0.48145466f, 0.48145466f}; + float image_std[3] = {0.26862954f, 0.26862954f, 0.26862954f}; +}; + +struct llava_image_embed { + float *embed; + int n_image_pos; +}; + +struct clip_image_u8 { + int nx; + int ny; + uint8_t *data = NULL; + size_t size; +}; + +struct clip_image_f32 { + int nx; + int ny; + float *data = NULL; + size_t size; +}; + +clip_image_u8* make_clip_image_u8() { return new clip_image_u8(); } +clip_image_f32* make_clip_image_f32() { return new clip_image_f32(); } +void clip_image_u8_free(clip_image_u8 * img) { if (img->data) { delete[] img->data; } delete img; } +void clip_image_f32_free(clip_image_f32 * img) { if (img->data) { delete[] img->data; } delete img; } + +static struct llava_image_embed* load_image(std::string image, void *clip_model_ptr); +struct llava_image_embed* llava_image_embed_make_with_filename(clip_model_config *clip_config, void *clip_model_ptr, const char *image_path); +static bool load_file_to_bytes(const char* path, unsigned char** bytesOut, long *sizeOut); +struct llava_image_embed* llava_image_embed_make_with_bytes(clip_model_config *clip_config, void *clip_model_ptr, const unsigned char *image_bytes, int image_bytes_length); +bool clip_image_load_from_bytes(const unsigned char *bytes, size_t bytes_length, struct clip_image_u8 *img); +static bool llava_image_embed_make_with_clip_img(clip_model_config *clip_config, void *clip_model_ptr, const clip_image_u8 *img, float **image_embd_out, int *n_img_pos_out); +static bool encode_image_with_clip(clip_model_config *clip_config, void *clip_model_ptr, const clip_image_u8 *img, float *image_embd, int *n_img_pos); +bool clip_image_preprocess(clip_model_config *clip_config, void *clip_model_ptr, const clip_image_u8 *img, clip_image_f32 *res, const bool pad2square); + + +// Function to speak in the background +static void sayInBackground(const std::string& text) { + std::string command = "./application/sts_utils/speak \"" + text + "\""; + int result = std::system(command.c_str()); + (void)result; +} + +std::string LLaVAGenerate(std::string llama_param_path, void* llama_model_ptr, std::string clip_param_path, void* clip_model_ptr, int model_type, + std::string text, std::string img_path, const struct opt_params generation_config, std::string voc_path, bool interactive, bool voicechat) { + std::vector last_n_tokens(generation_config.n_ctx); + std::fill(last_n_tokens.begin(), last_n_tokens.end(), 0); + std::vector embd; + std::vector generate_ids; + + // Tokenize first-part text + const int max_token = 2048; + std::vector input_ids(max_token); + llama_vocab vocab = llama_init_vocab(voc_path.c_str()); + const int n = llama_tokenize(vocab, text.c_str(), input_ids.data(), input_ids.size(), true); + input_ids.resize(n); + + bool is_codellama = false; + if (llama_param_path.find("CodeLLaMA") != std::string::npos) { + is_codellama = true; + } + + int n_consumed = 0; + while ((int)input_ids.size() > n_consumed) { + embd.push_back(input_ids[n_consumed]); + last_n_tokens.erase(last_n_tokens.begin()); + last_n_tokens.push_back(input_ids[n_consumed]); + ++n_consumed; + + if ((int)embd.size() >= generation_config.n_batch) { + break; + } + } + + bool previous_two_hash = false; + int break_cnt = 2; + bool new_prompt = true; + static bool first_prompt = true; + static bool has_past_kv = false; + static std::vector> past_keys, past_values; + int n_remain = generation_config.n_predict; + std::string output; + while (n_remain != 0 && break_cnt) { + std::vector logits(generation_config.n_vocab); + + int sqlen = 1; + if (new_prompt) { + sqlen = input_ids.size(); + } + if (model_type == LLaVA_INT4) { + Int4LlamaForCausalLM *model = static_cast(llama_model_ptr); + struct Int4LlamaForCausalLM_output model_output; + struct Int4LlamaForCausalLM_input model_input; + if (has_past_kv) { + Matrix3D input_ids_mat(input_ids.data(), 1, 1, sqlen); + model_input = {input_ids_mat, past_keys, past_values}; + } else { + // Load and preprocess image + auto image_embed = load_image(img_path, clip_model_ptr); + sqlen = input_ids.size() + 576; + int first_sqlen = input_ids.size(); + Matrix3D input_ids_mat(input_ids.data(), 1, 1, first_sqlen); + Matrix3D image_embed_mat(image_embed->embed, 1, 576, 4096); + model_input = {input_ids_mat, image_embed_mat}; + } + if (!new_prompt) STATS_START("Inference latency"); + model_output = model->forward(llama_param_path, model_input); + if (!new_prompt) STATS_END("Inference latency"); + past_keys = model_output.past_keys; + past_values = model_output.past_values; + // memcpy model_ouput.logits[-1] to logits + memcpy(logits.data(), &model_output.logits.m_data[(sqlen - 1) * generation_config.n_vocab], + generation_config.n_vocab * sizeof(float)); + } else if (model_type == LLaVA_FP32) { + Fp32LlamaForCausalLM *model = static_cast(llama_model_ptr); + struct Fp32LlamaForCausalLM_output model_output; + struct Fp32LlamaForCausalLM_input model_input; + if (has_past_kv) { + Matrix3D input_ids_mat(input_ids.data(), 1, 1, sqlen); + model_input = {input_ids_mat, past_keys, past_values}; + } else { + auto image_embed = load_image(img_path, clip_model_ptr); + sqlen = input_ids.size() + 576; + int first_sqlen = input_ids.size(); + Matrix3D input_ids_mat(input_ids.data(), 1, 1, first_sqlen); + Matrix3D image_embed_mat(image_embed->embed, 1, 576, 4096); + model_input = {input_ids_mat, image_embed_mat}; + } + if (!new_prompt) STATS_START("Inference latency"); + model_output = model->forward(model_input); + if (!new_prompt) STATS_END("Inference latency"); + past_keys = model_output.past_keys; + past_values = model_output.past_values; + // memcpy model_ouput.logits[-1] to logits + memcpy(logits.data(), &model_output.logits.m_data[(sqlen - 1) * generation_config.n_vocab], + generation_config.n_vocab * sizeof(float)); + } + has_past_kv = true; + + if (first_prompt) { + break; + } + + // Generate + const int n_ctx = generation_config.n_ctx; + const float temp = generation_config.temp; + const int32_t top_k = generation_config.top_k <= 0 ? generation_config.n_vocab : generation_config.top_k; + const float top_p = generation_config.top_p; + const float tfs_z = generation_config.tfs_z; + const float typical_p = generation_config.typical_p; + const int32_t repeat_last_n = generation_config.repeat_last_n < 0 ? n_ctx : generation_config.repeat_last_n; + const float repeat_penalty = generation_config.repeat_penalty; + const float alpha_presence = generation_config.presence_penalty; + const float alpha_frequency = generation_config.frequency_penalty; + const int mirostat = generation_config.mirostat; + const float mirostat_tau = generation_config.mirostat_tau; + const float mirostat_eta = generation_config.mirostat_eta; + const int n_vocab = generation_config.n_vocab; + + std::vector candidates; + candidates.reserve(n_vocab); + for (int token_id = 0; token_id < n_vocab; token_id++) { + candidates.emplace_back(OPT_token_data{token_id, logits[token_id], 0.0f}); + } + + OPT_token_data_array candidates_p = {candidates.data(), candidates.size(), false}; + + // Apply penalties + auto last_n_repeat = std::min(std::min((int)last_n_tokens.size(), repeat_last_n), n_ctx); + sample_repetition_penalty(&candidates_p, last_n_tokens.data() + last_n_tokens.size() - last_n_repeat, + last_n_repeat, repeat_penalty); + sample_frequency_and_presence_penalties(&candidates_p, + last_n_tokens.data() + last_n_tokens.size() - last_n_repeat, + last_n_repeat, alpha_frequency, alpha_presence); + + int id = 0; + if (temp <= 0) { + id = sample_token_greedy(&candidates_p); + } else { + if (mirostat == 1) { + static float mirostat_mu = 2.0f * mirostat_tau; + const int mirostat_m = 100; + sample_temperature(&candidates_p, temp); + id = + sample_token_mirostat(n_vocab, &candidates_p, mirostat_tau, mirostat_eta, mirostat_m, &mirostat_mu); + } else if (mirostat == 2) { + static float mirostat_mu = 2.0f * mirostat_tau; + sample_temperature(&candidates_p, temp); + id = sample_token_mirostat_v2(&candidates_p, mirostat_tau, mirostat_eta, &mirostat_mu); + } else { + // Temperature sampling + sample_top_k(&candidates_p, top_k, 1); + sample_tail_free(&candidates_p, tfs_z, 1); + sample_typical(&candidates_p, typical_p, 1); + sample_top_p(&candidates_p, top_p, 1); + sample_temperature(&candidates_p, temp); + id = sample_token(&candidates_p); + } + } + + if (id == 2) { + break_cnt--; + continue; + } // eos + else if (id == 1) + continue; + break_cnt = 2; + + bool skip = false; + if (id == 2277 && !previous_two_hash) { + previous_two_hash = true; + skip = true; + } else if (previous_two_hash && id == 29937) { // token = # + break_cnt = 0; + skip = true; + } else { + if (previous_two_hash) std::cout << "##" << std::endl; + previous_two_hash = false; + } + + if (is_codellama && new_prompt) { + new_prompt = false; + // continue; + } + + last_n_tokens.erase(last_n_tokens.begin()); + last_n_tokens.push_back(id); + embd.push_back(id); + generate_ids.push_back(id); + input_ids = std::vector{id}; + + if (interactive && !skip) { + output += llama_id_to_token(vocab, id); + std::cout << llama_id_to_token(vocab, id) << std::flush; + if (voicechat) { + // Remove quotes + output.erase(std::remove(output.begin(), output.end(), '\"'), output.end()); + // Remove hashtags + output.erase(std::remove(output.begin(), output.end(), '#'), output.end()); + // Remove dashes + std::replace(output.begin(), output.end(), '-', ' '); + + size_t lastPos; + // starts ealier but slows down dictation + bool ended = false; + if (output.find(", ") != std::string::npos){ + lastPos = output.rfind(','); + ended = true; + } + if (output.find("\n") != std::string::npos){ + lastPos = output.rfind('\n'); + ended = true; + } + else if (output.find(". ") != std::string::npos){ + lastPos = output.rfind('.'); + ended = true; + } + else if (output.find("! ") != std::string::npos){ + lastPos = output.rfind('!'); + ended = true; + } + else if (output.find("? ") != std::string::npos){ + lastPos = output.rfind('?'); + ended = true; + + } + else if (output.find(": ") != std::string::npos){ + lastPos = output.rfind(':'); + ended = true; + } + if (ended){ + // Extract sentence 1 (up to and including the last period) + std::string output_copy = output.substr(0, lastPos + 1); + // Extract beginning of sentence 2 (excluding the space after the last period) + output = output.substr(lastPos + 1); // Skip the last period and space + std::thread sayThread(sayInBackground, output_copy); + sayThread.detach(); + } + } + } + + new_prompt = false; + --n_remain; + } + if (voicechat && interactive){ + sayInBackground(output); + } + + if (interactive && !first_prompt) { + std::cout << std::endl; + } + first_prompt = false; + + Profiler::getInstance().report_internal(); + Profiler::getInstance().reset(); + return output; +} + + +/* +The codes below for image preprocessing are adapted from llama.cpp: +https://github.com/ggerganov/llama.cpp +*/ +static struct llava_image_embed* load_image(std::string image, void *clip_model_ptr) { + // load and preprocess the image + llava_image_embed *embed = NULL; + clip_model_config *clip_config = new clip_model_config(); + embed = llava_image_embed_make_with_filename(clip_config, clip_model_ptr, image.c_str()); + if (!embed) { + fprintf(stderr, "%s: is %s really an image file?\n", __func__, image.c_str()); + return NULL; + } + + return embed; +} + +struct llava_image_embed * llava_image_embed_make_with_filename(clip_model_config *clip_config, void *clip_model_ptr, const char *image_path) { + unsigned char *image_bytes; + long image_bytes_length; + auto loaded = load_file_to_bytes(image_path, &image_bytes, &image_bytes_length); + if (!loaded) { + fprintf(stderr, "%s: failed to load %s\n", __func__, image_path); + return NULL; + } + + auto embed = llava_image_embed_make_with_bytes(clip_config, clip_model_ptr, image_bytes, image_bytes_length); + free(image_bytes); + + return embed; +} + +static bool load_file_to_bytes(const char* path, unsigned char** bytesOut, long *sizeOut) { + auto file = fopen(path, "rb"); + if (file == NULL) { + fprintf(stderr, "%s: can't read file %s\n", __func__, path); + return false; + } + + fseek(file, 0, SEEK_END); + auto fileSize = ftell(file); + fseek(file, 0, SEEK_SET); + + auto buffer = (unsigned char *)malloc(fileSize); // Allocate memory to hold the file data + if (buffer == NULL) { + fprintf(stderr, "%s: failed to alloc %ld bytes for file %s\n", __func__, fileSize, path); + fclose(file); + return false; + } + errno = 0; + size_t ret = fread(buffer, 1, fileSize, file); // Read the file into the buffer + if (ferror(file)) { + fprintf(stderr, "%s: read error: %s\n", __func__, strerror(errno)); + fclose(file); + return false; + } + if (ret != (size_t) fileSize) { + fprintf(stderr, "%s: unexpectedly reached end of file\n", __func__); + fclose(file); + return false; + } + fclose(file); // Close the file + + *bytesOut = buffer; + *sizeOut = fileSize; + return true; +} + +struct llava_image_embed* llava_image_embed_make_with_bytes(clip_model_config *clip_config, void *clip_model_ptr, const unsigned char *image_bytes, int image_bytes_length) { + clip_image_u8 *img = make_clip_image_u8(); + if (!clip_image_load_from_bytes(image_bytes, image_bytes_length, img)) { + clip_image_u8_free(img); + fprintf(stderr, "%s: can't load image from bytes, is it a valid image?", __func__); + return NULL; + } + + float* image_embed = NULL; + int n_image_pos = 0; + bool image_embed_result = llava_image_embed_make_with_clip_img(clip_config, clip_model_ptr, img, &image_embed, &n_image_pos); + if (!image_embed_result) { + clip_image_u8_free(img); + fprintf(stderr, "%s: coulnd't embed the image\n", __func__); + return NULL; + } + + clip_image_u8_free(img); + auto result = (llava_image_embed*)malloc(sizeof(llava_image_embed)); + result->embed = image_embed; + result->n_image_pos = n_image_pos; + return result; +} + +static void build_clip_img_from_data(const stbi_uc *data, int nx, int ny, clip_image_u8 *img) { + img->nx = nx; + img->ny = ny; + img->size = nx * ny * 3; + img->data = new uint8_t[img->size](); + memcpy(img->data, data, img->size); +} + +bool clip_image_load_from_bytes(const unsigned char *bytes, size_t bytes_length, struct clip_image_u8 *img) { + int nx, ny, nc; + auto data = stbi_load_from_memory(bytes, bytes_length, &nx, &ny, &nc, 3); + if (!data) { + fprintf(stderr, "%s: failed to decode image bytes\n", __func__); + return false; + } + build_clip_img_from_data(data, nx, ny, img); + stbi_image_free(data); + return true; +} + +size_t clip_embd_nbytes(clip_model_config *clip_config) { + return clip_config->num_patches * clip_config->mmproj_dim * sizeof(float); +} + +static bool llava_image_embed_make_with_clip_img(clip_model_config *clip_config, void *clip_model_ptr, const clip_image_u8 *img, float **image_embd_out, int *n_img_pos_out) { + float *image_embd = (float *)malloc(clip_embd_nbytes(clip_config)); + if (!image_embd) { + fprintf(stderr, "Unable to allocate memory for image embeddings\n"); + free(image_embd); + return false; + } + + int n_img_pos; + if (!encode_image_with_clip(clip_config, clip_model_ptr, img, image_embd, &n_img_pos)) { + fprintf(stderr, "%s: cannot encode image, aborting\n", __func__); + free(image_embd); + return false; + } + *image_embd_out = image_embd; + *n_img_pos_out = n_img_pos; + + return true; +} + +static bool encode_image_with_clip(clip_model_config *clip_config, void *clip_model_ptr, const clip_image_u8 *img, float *image_embd, int *n_img_pos) { + clip_image_f32 *img_res = make_clip_image_f32(); + if (!clip_image_preprocess(clip_config, clip_model_ptr, img, img_res, /*pad2square =*/ true)) { + fprintf(stderr, "%s: unable to preprocess image\n", __func__); + clip_image_f32_free(img_res); + return false; + } + + Fp32CLIPVisionTransformer *clip_model = static_cast(clip_model_ptr); + struct Fp32CLIPVisionTransformer_input model_input; + struct Fp32CLIPVisionTransformer_output model_output; + Matrix3D input_image(img_res->data, 3, img_res->nx, img_res->ny); + model_input = {input_image}; + model_output = clip_model->forward(model_input); + memcpy(image_embd, model_output.last_hidden_state.m_data, clip_embd_nbytes(clip_config)); + + clip_image_f32_free(img_res); + + return true; +} + +// normalize: x = (x - mean) / std +// TODO: implement bicubic interpolation instead of linear. +bool clip_image_preprocess(clip_model_config *clip_config, void *clip_model_ptr, const clip_image_u8 *img, clip_image_f32 *res, const bool pad2square) { + // the logic below is to pad the shorter side to the longer side with a background color: rgb(122, 116, 104) + // see https://github.com/haotian-liu/LLaVA/blob/e854a2bf85118c504f6f16bf5c3c7c92f8fa8c6b/llava/conversation.py#L113-L156 + + clip_image_u8 *temp = make_clip_image_u8(); // we will keep the input image data here temporarily + if (pad2square && img->nx != img->ny) { + int longer_side = std::max(img->nx, img->ny); + temp->nx = longer_side; + temp->ny = longer_side; + temp->size = 3 * longer_side * longer_side; + temp->data = new uint8_t[temp->size](); + uint8_t bc[3] = {122, 116, 104}; // bakground color in RGB from LLaVA + + // fill with background color + for (size_t i = 0; i < temp->size; i++) { + temp->data[i] = bc[i % 3]; + } + + // copy from the input image + for (int y = 0; y < img->ny; y++) { + for (int x = 0; x < img->nx; x++) { + const int i = 3 * (y * img->nx + x); + const int j = 3 * (y * temp->nx + x); + temp->data[j] = img->data[i]; + temp->data[j+1] = img->data[i+1]; + temp->data[j+2] = img->data[i+2]; + } + } + } else { + temp->nx = img->nx; + temp->ny = img->ny; + temp->size = img->size; + temp->data = new uint8_t[temp->size](); + memcpy(&temp->data[0], &img->data[0], temp->size); // copy + } + + const int nx = temp->nx; + const int ny = temp->ny; + + const int nx2 = clip_config->image_size; + const int ny2 = clip_config->image_size; + + res->nx = nx2; + res->ny = ny2; + res->size = 3 * nx2 * ny2; + res->data = new float[res->size](); + + const float scale = std::max(nx, ny) / (float)clip_config->image_size; + + const int nx3 = int(nx / scale + 0.5f); + const int ny3 = int(ny / scale + 0.5f); + + const auto &m3 = clip_config->image_mean; // {0.48145466f, 0.4578275f, 0.40821073f}; + const auto &s3 = clip_config->image_std; // {0.26862954f, 0.26130258f, 0.27577711f}; + + for (int y = 0; y < ny3; y++) { + for (int x = 0; x < nx3; x++) { + for (int c = 0; c < 3; c++) { + // linear interpolation + const float sx = (x + 0.5f) * scale - 0.5f; + const float sy = (y + 0.5f) * scale - 0.5f; + + const int x0 = std::max(0, (int)std::floor(sx)); + const int y0 = std::max(0, (int)std::floor(sy)); + + const int x1 = std::min(x0 + 1, nx - 1); + const int y1 = std::min(y0 + 1, ny - 1); + + const float dx = sx - x0; + const float dy = sy - y0; + + const int j00 = 3 * (y0 * nx + x0) + c; + const int j01 = 3 * (y0 * nx + x1) + c; + const int j10 = 3 * (y1 * nx + x0) + c; + const int j11 = 3 * (y1 * nx + x1) + c; + + const float v00 = temp->data[j00]; + const float v01 = temp->data[j01]; + const float v10 = temp->data[j10]; + const float v11 = temp->data[j11]; + + const float v0 = v00 * (1.0f - dx) + v01 * dx; + const float v1 = v10 * (1.0f - dx) + v11 * dx; + + const float v = v0 * (1.0f - dy) + v1 * dy; + + const uint8_t v2 = std::min(std::max(std::round(v), 0.0f), 255.0f); + + const int i = 3 * (y * nx3 + x) + c; + + res->data[i] = ((float(v2) / 255.0f) - m3[c]) / s3[c]; + } + } + } + clip_image_u8_free(temp); + + return true; +} diff --git a/llm/src/ops/Conv2D.cc b/llm/src/ops/Conv2D.cc new file mode 100644 index 00000000..f73b6bde --- /dev/null +++ b/llm/src/ops/Conv2D.cc @@ -0,0 +1,95 @@ +#include +#include + +#include "operators.h" +#include "utils.h" + +void load_Conv2D(Conv2D &op, std::string prefix) { + read_to_array((prefix + "/weight.bin").c_str(), op.params.weight.m_data, op.params.weight.length()); + // if (has_bias) { + // read_to_array((prefix + "/bias.bin").c_str(), op.params.bias.m_data, op.params.bias.length()); + // } +} + +// #define MIN(a, b) ((a) < (b) ? (a) : (b)) +// #define MAX(a, b) ((a) < (b) ? (b) : (a)) +float ActivationFunctionWithMinMax(float x, float output_activation_min, float output_activation_max) { + return MIN(MAX(x, output_activation_min), output_activation_max); +} + +int Offset(const uint16_t dims_data1, const uint16_t dims_data2, const uint16_t dims_data3, int i0, int i1, int i2, int i3) { + return ((i0 * dims_data1 + i1) * dims_data2 + i2) * dims_data3 + i3; +} + +void Conv2D::forward(const Matrix3D &input, Matrix3D &output) { + PROFILE_START(profile_name); + // Matrix4D weight = params.weight; + const float* filter_data = params.weight.m_data; + // Matrix3D bias = params.bias; + const float* input_data = input.m_data; + float* output_data = output.m_data; + const int input_depth = input.m_dim_x, input_width = input.m_dim_y, input_height = input.m_dim_z; + const int filter_input_depth = params.weight.m_dim_w, filter_width = params.weight.m_dim_x, filter_height = params.weight.m_dim_y; + const int output_depth = output.m_dim_x, output_width = output.m_dim_y, output_height = output.m_dim_z; + const int batches = 1; + + const int stride_width = params.stride_width, stride_height = params.stride_height; + const int dilation_width_factor = params.dilation_width_factor, dilation_height_factor = params.dilation_height_factor; + const int pad_width = params.padding_width, pad_height = params.padding_height; + const float output_activation_min = params.float_activation_min, output_activation_max = params.float_activation_max; + + // assert(output.m_dim_x == input.m_dim_x); + // assert(output.m_dim_y == input.m_dim_y); + // assert(output.m_dim_z == input.m_dim_z); + // assert(input.m_dim_z == weight.m_dim_z); + // assert(input.m_dim_z == bias.m_dim_z); + + const int groups = input_depth / filter_input_depth; + const int filters_per_group = output_depth / groups; + + for (int batch = 0; batch < batches; ++batch) { + for (int out_y = 0; out_y < output_height; ++out_y) { + const int in_y_origin = (out_y * stride_height) - pad_height; + for (int out_x = 0; out_x < output_width; ++out_x) { + const int in_x_origin = (out_x * stride_width) - pad_width; + for (int out_channel = 0; out_channel < output_depth; ++out_channel) { + int group = out_channel / filters_per_group; + float total = 0.f; + + for (int filter_y = 0; filter_y < filter_height; ++filter_y) { + const int in_y = in_y_origin + dilation_height_factor * filter_y; + for (int filter_x = 0; filter_x < filter_width; ++filter_x) { + const int in_x = in_x_origin + dilation_width_factor * filter_x; + + // Zero padding by omitting the areas outside the image. + const bool is_point_inside_image = + (in_x >= 0) && (in_x < input_width) && (in_y >= 0) && + (in_y < input_height); + + if (!is_point_inside_image) { + continue; + } + for (int in_channel = 0; in_channel < filter_input_depth; ++in_channel) { + float input_value = + input_data[Offset(input_height, input_width, input_depth, batch, in_y, in_x, + in_channel + group * filter_input_depth)]; + float filter_value = filter_data[Offset( + filter_height, filter_width, input_depth, out_channel, filter_y, filter_x, in_channel)]; + total += (input_value * filter_value); + } + } + } + // float bias_value = 0.0f; + // if (has_bias) { + // bias_value = bias_data[out_channel]; + // } + // output_data[Offset(output_height, output_width, output_depth, batch, out_y, out_x, out_channel)] = + // ActivationFunctionWithMinMax(total + bias_value, output_activation_min, output_activation_max); + output_data[Offset(output_height, output_width, output_depth, batch, out_y, out_x, out_channel)] = total; + } + } + } + } + + PROFILE_END(profile_name); +} diff --git a/llm/src/ops/Gelu.cc b/llm/src/ops/Gelu.cc new file mode 100644 index 00000000..6020dbfc --- /dev/null +++ b/llm/src/ops/Gelu.cc @@ -0,0 +1,27 @@ +#include "ops/Gelu.h" + +#include + +static const float GELU_COEF_A = 0.044715f; +static const float GELU_QUICK_COEF = -1.702f; +static const float SQRT_2_OVER_PI = 0.79788456080286535587989211986876f; + +float Gelu_imp(float x) { + return 0.5f * x * (1.0f + tanhf(SQRT_2_OVER_PI * x * (1.0f + GELU_COEF_A * x * x))); +} + +void Gelu(Matrix3D a) { + for (int i = 0; i < a.length(); i++) { + a.m_data[i] = Gelu_imp(a.m_data[i]); + } +} + +float Gelu_quick_imp(float x) { + return x * (1.0f / (1.0f + expf(GELU_QUICK_COEF * x))); +} + +void Gelu_quick(Matrix3D a) { + for (int i = 0; i < a.length(); i++) { + a.m_data[i] = Gelu_quick_imp(a.m_data[i]); + } +} diff --git a/llm/tools/clip_exporter.py b/llm/tools/clip_exporter.py new file mode 100644 index 00000000..11b9d80f --- /dev/null +++ b/llm/tools/clip_exporter.py @@ -0,0 +1,166 @@ +"""Implementation of exporting Clip PyTorch model to TinyChatEngine format. + +Usage: + python clip_exporter.py + +Example commandline: + python tools/clip_exporter.py --model models/clip-vit-large-patch14-336 --output models/CLIP_ViT_Large +""" +import argparse +import math +import os +import struct + +import numpy as np +import torch +from transformers import CLIPModel, CLIPProcessor + +@torch.no_grad() +def _export_vision_model(model, prefix): + outpath = prefix + os.makedirs(outpath, exist_ok=True) + _export_embeddings(model.embeddings, os.path.join(outpath, "embeddings")) + _export_LayerNorm(model.pre_layrnorm, os.path.join(outpath, "pre_layernorm")) + _export_encoder(model.encoder, os.path.join(outpath, "encoder")) + + +def _export_embeddings(embeddings, prefix): + # class_embedding + outpath = prefix + "/class_embedding" + os.makedirs(outpath, exist_ok=True) + with open(os.path.join(f"{outpath}", "weight.bin"), "wb") as f: + f.write(embeddings.class_embedding.cpu().float().numpy().tobytes()) + # patch_embedding + outpath = prefix + "/patch_embedding" + os.makedirs(outpath, exist_ok=True) + # print(f"Transpose patch_embedding from {embeddings.patch_embedding.weight.cpu().float().numpy().shape} to {embeddings.patch_embedding.weight.cpu().float().numpy().transpose(0, 2, 3, 1).shape}") + with open(os.path.join(f"{outpath}", "weight.bin"), "wb") as f: + # f.write(embeddings.patch_embedding.weight.cpu().float().numpy().tobytes()) + f.write(embeddings.patch_embedding.weight.cpu().float().numpy().transpose(0, 2, 3, 1).tobytes()) + # position_embedding + outpath = prefix + "/position_embedding" + os.makedirs(outpath, exist_ok=True) + with open(os.path.join(f"{outpath}", "weight.bin"), "wb") as f: + f.write(embeddings.position_embedding.weight.cpu().float().numpy().tobytes()) + + +def _export_encoder(model, prefix): + outpath = prefix + os.makedirs(outpath, exist_ok=True) + for idx, layer in enumerate(model.layers): + _export_encoder_layer(layer, os.path.join(outpath, f"layer{idx}")) + + +def _export_encoder_layer(layer, prefix): + outpath = prefix + os.makedirs(outpath, exist_ok=True) + _export_attention_params(layer.self_attn, os.path.join(outpath, "self_attn")) + _export_LayerNorm(layer.layer_norm1, os.path.join(outpath, "layer_norm1")) + _export_linearfp(layer.mlp.fc1, os.path.join(outpath, "mlp_fc1")) + _export_linearfp(layer.mlp.fc2, os.path.join(outpath, "mlp_fc2")) + _export_LayerNorm(layer.layer_norm2, os.path.join(outpath, "layer_norm2")) + + +def _export_LayerNorm(op, prefix): + outpath = prefix + os.makedirs(outpath, exist_ok=True) + with open(os.path.join(f"{outpath}", "weight.bin"), "wb") as f: + f.write(op.weight.cpu().float().numpy().tobytes()) + with open(os.path.join(f"{outpath}", "bias.bin"), "wb") as f: + f.write(op.bias.cpu().float().numpy().tobytes()) + + +def _export_linearfp(op, prefix): + outpath = prefix + os.makedirs(outpath, exist_ok=True) + with open(os.path.join(f"{outpath}", "weight.bin"), "wb") as f: + f.write(op._parameters["weight"].cpu().float().numpy().tobytes()) + with open(os.path.join(f"{outpath}", "bias.bin"), "wb") as f: + f.write(op._parameters["bias"].cpu().float().numpy().tobytes()) + + +def _export_BMM_F32T(alpha, prefix): + outpath = prefix + os.makedirs(outpath, exist_ok=True) + with open(os.path.join(f"{outpath}", "alpha.bin"), "wb") as f: + f.write(struct.pack("f", alpha)) + + +def _export_attention_params(attn, prefix: str): + outpath = prefix + os.makedirs(outpath, exist_ok=True) + _export_linearfp(attn.k_proj, os.path.join(outpath, "k_proj")) + _export_linearfp(attn.v_proj, os.path.join(outpath, "v_proj")) + _export_linearfp(attn.q_proj, os.path.join(outpath, "q_proj")) + _export_linearfp(attn.out_proj, os.path.join(outpath, "out_proj")) + qk_bmm_alpha = 1 / math.sqrt(attn.head_dim) + _export_BMM_F32T(qk_bmm_alpha, os.path.join(outpath, "qk_bmm")) + + +def _export_processor(processor, prefix): + outpath = prefix + "/image_processor" + os.makedirs(outpath, exist_ok=True) + with open(os.path.join(f"{outpath}", "image_mean.bin"), "wb") as f: + # f.write(processor.image_processor.image_mean.numpy().astype(np.float32).tobytes()) + # Convert list to numpy array + f.write(np.array(processor.image_processor.image_mean).astype(np.float32).tobytes()) + + with open(os.path.join(f"{outpath}", "image_std.bin"), "wb") as f: + # f.write(processor.image_processor.image_std.numpy().astype(np.float32).tobytes()) + # Convert list to numpy array + f.write(np.array(processor.image_processor.image_std).astype(np.float32).tobytes()) + +def main(): + """Export a Clip model to TinyChatEngine format.""" + parser = argparse.ArgumentParser(description="export Clip pytorch model to TinyChatEngine format.") + parser.add_argument("--hf_path", type=str, help="Path to huggingface model hub", default=None) + parser.add_argument("--model", type=str, help="Path of the Clip torch model") + parser.add_argument("--output", type=str, help="Output directory of the exported model") + + args = parser.parse_args() + + if args.hf_path is None: + if not os.path.exists(args.model): + print(f"The model path '{args.model}' does not exist.") + return + + if not os.path.exists(args.output): + print(f"The output path '{args.output}' does not exist. Creating a new directory...") + os.makedirs(args.output, exist_ok=True) + + print("Loading model...") + if args.model.endswith(".pt"): + if args.model.split("/")[-1].lower().startswith("clip"): + if args.model.split("-")[1].lower() == "vit" and args.model.split("-")[2].lower() == "large": + print("Loading Clip ViT Large .pt model..."); + model = CLIPModel.from_pretrained("openai/clip-vit-large-patch14-336", torch_dtype=torch.float32, low_cpu_mem_usage=True, trust_remote_code=True, offload_state_dict=True) + processor = CLIPProcessor.from_pretrained("openai/clip-vit-large-patch14-336") + else: + print("Model size not supported.") + return + else: + print("Model type not supported.") + return + + model.load_state_dict(torch.load(args.model)) + else: + print("Loading Clip ViT Large model...") + model = CLIPModel.from_pretrained(args.model, torch_dtype=torch.float32, low_cpu_mem_usage=True, trust_remote_code=True, offload_state_dict=True) + processor = CLIPProcessor.from_pretrained(args.model) + else: + print("Loading Clip ViT Large model from Hugging Face...") + model = CLIPModel.from_pretrained(args.hf_path, torch_dtype=torch.float32) + processor = CLIPProcessor.from_pretrained(args.hf_path) + + print("Start exporting Clip Vision model...") + print("Pop out the last layer of the vision model.") + model.vision_model.encoder.layers.pop(-1) + # for name, param in model.named_parameters(): + # print (name) + _export_vision_model(model.vision_model, args.output) + _export_processor(processor, args.output) + print("Finished exporting Clip Vision model.") + + +if __name__ == "__main__": + main() diff --git a/llm/tools/download_model.py b/llm/tools/download_model.py index a530e3d0..14288832 100644 --- a/llm/tools/download_model.py +++ b/llm/tools/download_model.py @@ -90,6 +90,10 @@ "url": "https://www.dropbox.com/scl/fi/7lu8rz8z5npe2nccfr66n/OPT_6.7B.zip?rlkey=5dtie29ncqscifs2g4ylpwnz7&dl=1", # noqa: E501 "md5sum": "6d061dc64ccc60864391f484b5e564d0", }, + "LLaVA_7B_awq_int4_CLIP_ViT-L": { + "url": "https://www.dropbox.com/scl/fi/rztjmc76yhtvudxiru03b/LLaVA_7B_CLIP_ViT-L.zip?rlkey=s1xy8ocw2ctioqziutucjim8w&dl=1", # noqa: E501 + "md5sum": "9fa1bc2f8c9b06b46c1f37bd2b17702c", + }, "StarCoder_15.5B_awq_int4": { "url": "https://www.dropbox.com/scl/fi/fe4dkrnzc25bt166w6bby/StarCoder_15.5B.zip?rlkey=ml1x96uep2k03z78ci7s1c0yb&dl=1", "md5sum": "0f16236c0aec0b32b553248cc78b8caf", @@ -128,6 +132,10 @@ "url": "https://www.dropbox.com/scl/fi/uj4z3kp5wd3cvaaiyppvs/OPT_6.7B.zip?rlkey=yw5dxd18ajsc20g3mr2rqvnnt&dl=1", # noqa: E501 "md5sum": "4aba1bee864029d06d1fec67f4d95a22", }, + "LLaVA_7B_awq_int4_CLIP_ViT-L": { + "url": "https://www.dropbox.com/scl/fi/x81yfi26oonbu02xne2kp/LLaVA_7B_CLIP_ViT-L.zip?rlkey=8h5cz6aund96k2841wmcrnv5z&dl=1", # noqa: E501 + "md5sum": "f903927fe3d02d9db7fb8f0c6587c136", + }, "StarCoder_15.5B_awq_int4": { "url": "https://www.dropbox.com/scl/fi/86o2cblncmfd3xvuyyaqc/StarCoder_15.5B.zip?rlkey=2gswnyq9xihencaduddylpb2k&dl=1", "md5sum": "48383ce0bf01b137069e3612cab8525f", diff --git a/llm/tools/llama_exporter.py b/llm/tools/llama_exporter.py index 5213dc33..47765689 100644 --- a/llm/tools/llama_exporter.py +++ b/llm/tools/llama_exporter.py @@ -4,7 +4,7 @@ python llama_exporter.py Example commandline: - python llama_exporter.py ~/llama2-chat/hf7B models/LLaMA_7B_2_chat + python tools/llama_exporter.py --model models/llama2-chat/hf7B --output models/LLaMA_7B_2_chat """ import argparse import math @@ -113,8 +113,8 @@ def main(): return if not os.path.exists(args.output): - print(f"The model path '{args.output}' does not exist.") - return + print(f"The output path '{args.output}' does not exist. Creating a new directory...") + os.makedirs(args.output, exist_ok=True) print("Loading model...") if args.model.endswith(".pt"): @@ -142,8 +142,9 @@ def main(): else: model = LlamaForCausalLM.from_pretrained(args.hf_path, torch_dtype=torch.bfloat16) - print("Start exporting the model...") + print("Start exporting LLaMA model...") _export_model(model, args.output) + print("Finished exporting LLaMA model.") if __name__ == "__main__": diff --git a/llm/tools/llama_qkv_merger.py b/llm/tools/llama_qkv_merger.py index f2ffabda..421bb5ec 100644 --- a/llm/tools/llama_qkv_merger.py +++ b/llm/tools/llama_qkv_merger.py @@ -80,13 +80,13 @@ def _merge_model( ): # Check model name model_name_size = prefix.split("/")[-1] - if model_name_size.startswith("LLaMA_7B") or model_name_size.startswith("CodeLLaMA_7B"): + if model_name_size.startswith("LLaMA_7B") or model_name_size.startswith("CodeLLaMA_7B") or model_name_size.startswith("LLaVA_7B"): layer_num = 32 elif model_name_size.startswith("LLaMA_13B") or model_name_size.startswith("CodeLLaMA_13B"): layer_num = 40 else: raise ValueError( - "Invalid model name. Expected 'LLaMA_7B', 'CodeLLaMA_7B', 'LLaMA_13B', or 'CodeLLaMA_13B'." + "Invalid model name. Expected 'LLaMA_7B', 'CodeLLaMA_7B', 'LLaMA_13B', 'CodeLLaMA_13B', or 'LLaVA_7B'." ) print(f"Merge {model_name_size}'s QKV layers...") @@ -94,8 +94,8 @@ def _merge_model( model_name = model_name_size # LLaMA - if model_name.startswith("LLaMA") or model_name.startswith("CodeLLaMA"): - if model_name.startswith("LLaMA_7B") or model_name.startswith("CodeLLaMA_7B"): + if model_name.startswith("LLaMA") or model_name.startswith("CodeLLaMA") or model_name.startswith("LLaVA"): + if model_name.startswith("LLaMA_7B") or model_name.startswith("CodeLLaMA_7B") or model_name.startswith("LLaVA_7B"): embed_dim = 4096 hidden_dim = 11008 elif model_name.startswith("LLaMA_13B") or model_name.startswith("CodeLLaMA_13B"): diff --git a/llm/tools/llava_exporter.py b/llm/tools/llava_exporter.py new file mode 100644 index 00000000..91ab3bd6 --- /dev/null +++ b/llm/tools/llava_exporter.py @@ -0,0 +1,175 @@ +"""Implementation of exporting LLaVA PyTorch model to TinyChatEngine format. + +Usage: + python llava_exporter.py + +Example commandline: + python tools/llava_exporter.py --model models/llava-v1.5-7b --output models/LLaVA_7B +""" + +import argparse +import math +import os +import struct +import torch +from transformers import AutoProcessor, AutoModelForCausalLM, AutoConfig + +import sys +sys.path.append('../../../LLaVA') +from llava.model.builder import load_pretrained_model +from llava.mm_utils import get_model_name_from_path +from llava.eval.run_llava import eval_model +from llava import LlavaLlamaForCausalLM + +@torch.no_grad() +def _export_model(model, prefix): + + outpath = prefix + os.makedirs(outpath, exist_ok=True) + with open(os.path.join(f"{outpath}", "lm_head.bin"), "wb") as f: + f.write(model.lm_head._parameters["weight"].cpu().float().numpy().tobytes()) + _export_llama_model(model.model, os.path.join(f"{outpath}", "decoder")) + + for idx, mm_projector in enumerate(model.model.mm_projector): + if idx == 0 or idx == 2: + # _export_mm_projector(mm_projector, os.path.join(outpath, f"mm_projector_{idx}")) + # Export to Clip's folder "models/CLIP_ViT_Large" + _export_mm_projector(mm_projector, f"models/CLIP_ViT_Large/mm_projector_{idx}") + + +def _export_mm_projector(mm_projector, prefix): + outpath = prefix + os.makedirs(outpath, exist_ok=True) + with open(os.path.join(f"{outpath}", "weight.bin"), "wb") as f: + f.write(mm_projector.weight.cpu().float().numpy().tobytes()) + with open(os.path.join(f"{outpath}", "bias.bin"), "wb") as f: + f.write(mm_projector.bias.cpu().float().numpy().tobytes()) + + +def _export_embed_tokens(embed_tokens, prefix): + outpath = prefix + os.makedirs(outpath, exist_ok=True) + with open(os.path.join(f"{outpath}", "weight.bin"), "wb") as f: + f.write(embed_tokens.weight.cpu().float().numpy().tobytes()) + + +def _export_llama_model(model, prefix): + outpath = prefix + os.makedirs(outpath, exist_ok=True) + + _export_embed_tokens(model.embed_tokens, os.path.join(outpath, "embed_tokens")) + _export_LlamaRMSNorm(model.norm, os.path.join(outpath, "norm")) + for idx, layer in enumerate(model.layers): + _export_llama_layer(layer, os.path.join(outpath, f"layer{idx}")) + + +def _export_LlamaRMSNorm(op, prefix): + outpath = prefix + os.makedirs(outpath, exist_ok=True) + with open(os.path.join(f"{outpath}", "weight.bin"), "wb") as f: + f.write(op.weight.cpu().float().numpy().tobytes()) + + +def _export_llama_layer(layer, prefix): + outpath = prefix + os.makedirs(outpath, exist_ok=True) + _export_attention_params(layer.self_attn, os.path.join(outpath, "self_attn")) + _export_LlamaRMSNorm(layer.input_layernorm, os.path.join(outpath, "input_layernorm")) + _export_LlamaRMSNorm( + layer.post_attention_layernorm, + os.path.join(outpath, "post_attention_layernorm"), + ) + _export_linearfp(layer.mlp.gate_proj, os.path.join(outpath, "gate_proj")) + _export_linearfp(layer.mlp.down_proj, os.path.join(outpath, "down_proj")) + _export_linearfp(layer.mlp.up_proj, os.path.join(outpath, "up_proj")) + + +def _export_linearfp(op, prefix): + outpath = prefix + os.makedirs(outpath, exist_ok=True) + with open(os.path.join(f"{outpath}", "weight.bin"), "wb") as f: + f.write(op._parameters["weight"].cpu().float().numpy().tobytes()) + + +def _export_rotaryEmbedding(op, prefix): + outpath = prefix + os.makedirs(outpath, exist_ok=True) + with open(os.path.join(f"{outpath}", "cos_cached.bin"), "wb") as f: + f.write(op.cos_cached.cpu().float().numpy().tobytes()) + with open(os.path.join(f"{outpath}", "sin_cached.bin"), "wb") as f: + f.write(op.sin_cached.cpu().float().numpy().tobytes()) + + +def _export_BMM_F32T(alpha, prefix): + outpath = prefix + os.makedirs(outpath, exist_ok=True) + with open(os.path.join(f"{outpath}", "alpha.bin"), "wb") as f: + f.write(struct.pack("f", alpha)) + + +def _export_attention_params(attn, prefix: str): + outpath = prefix + os.makedirs(outpath, exist_ok=True) + _export_linearfp(attn.k_proj, os.path.join(outpath, "k_proj")) + _export_linearfp(attn.v_proj, os.path.join(outpath, "v_proj")) + _export_linearfp(attn.q_proj, os.path.join(outpath, "q_proj")) + _export_linearfp(attn.o_proj, os.path.join(outpath, "o_proj")) + qk_bmm_alpha = 1 / math.sqrt(attn.head_dim) + _export_BMM_F32T(qk_bmm_alpha, os.path.join(outpath, "qk_bmm")) + _export_rotaryEmbedding(attn.rotary_emb, os.path.join(outpath, "rotary_emb")) + + +def main(): + """Export a LLaVA model to TinyChatEngine format.""" + parser = argparse.ArgumentParser(description="export LLaVA pytorch model to TinyChatEngine format.") + parser.add_argument("--hf_path", type=str, help="Path to huggingface model hub", default=None) + parser.add_argument("--model", type=str, help="Path of the LLaVA torch model") + parser.add_argument("--output", type=str, help="Output directory of the exported model") + + args = parser.parse_args() + + if args.hf_path is None: + if not os.path.exists(args.model): + print(f"The model path '{args.model}' does not exist.") + return + + if not os.path.exists(args.output): + print(f"The output path '{args.output}' does not exist. Creating a new directory...") + os.makedirs(args.output, exist_ok=True) + + print("Loading model...") + if args.model.endswith(".pt"): + if args.model.split("/")[-1].lower().startswith("llava"): + if args.model.split("-")[2].lower() == "7b": + print("Loading LLaVA 7B model...") + config = AutoConfig.from_pretrained("/home/wweichen/workspace/models/LLM/llava-v1.5-7b", trust_remote_code=True) + # processor = AutoProcessor.from_pretrained("liuhaotian/llava-v1.5-7b") + model = LlavaLlamaForCausalLM.from_pretrained("/home/wweichen/workspace/models/LLM/llava-v1.5-7b", torch_dtype=torch.float16, low_cpu_mem_usage=True, trust_remote_code=True, offload_state_dict=True) + elif args.model.split("-")[2].lower() == "13b": + print("Loading LLaVA 13B model...") + config = AutoConfig.from_pretrained("/home/wweichen/workspace/models/LLM/llava-v1.5-13b", trust_remote_code=True) + # processor = AutoProcessor.from_pretrained("liuhaotian/llava-v1.5-13b") + model = LlavaLlamaForCausalLM.from_pretrained("/home/wweichen/workspace/models/LLM/llava-v1.5-13b", config=config, torch_dtype=torch.float16, low_cpu_mem_usage=True, trust_remote_code=True, offload_state_dict=True) + else: + print("Model size not supported.") + return + else: + print("Model type not supported.") + return + + model.load_state_dict(torch.load(args.model)) + else: + config = AutoConfig.from_pretrained(args.model, trust_remote_code=True) + # processor = AutoProcessor.from_pretrained(args.model) + model = LlavaLlamaForCausalLM.from_pretrained(args.model, torch_dtype=torch.float16, low_cpu_mem_usage=True, trust_remote_code=True, offload_state_dict=True) + else: + # processor = AutoProcessor.from_pretrained(args.hf_path) + model = AutoModelForCausalLM.from_pretrained(args.hf_path, torch_dtype=torch.float16) + + print("Start exporting LLaVA model...") + _export_model(model, args.output) + print("Finished exporting LLaVA model.") + + +if __name__ == "__main__": + main() diff --git a/llm/tools/model_quantizer.py b/llm/tools/model_quantizer.py index 66632edd..11a1f293 100644 --- a/llm/tools/model_quantizer.py +++ b/llm/tools/model_quantizer.py @@ -4,9 +4,9 @@ python model_quantizer.py --model_path --method Example commands: - python model_quantizer.py --model_path models/LLaMA_7B_2_chat --method QM_x86 + python tools/model_quantizer.py --model_path models/LLaMA_7B_2_chat --method QM_x86 - python model_quantizer.py --model_path FP32/models/OPT_125m --method QM_ARM --output_path INT4 + python tools/model_quantizer.py --model_path FP32/models/OPT_125m --method QM_ARM --output_path INT4 """ import argparse @@ -130,9 +130,14 @@ def _quantize_model( layer_num = 40 elif model_name_size.startswith("StarCoder"): layer_num = 40 + elif model_name_size.startswith("LLaVA_7B"): + layer_num = 32 + elif model_name_size.startswith("VILA_7B"): + layer_num = 32 else: raise ValueError( - "Invalid model name. Expected 'OPT_125m', 'OPT_1.3B', 'OPT_6.7B', 'LLaMA_7B', 'LLaMA_13B', 'CodeLLaMA_7B', 'CodeLLaMA_13B', or 'StarCoder'." + "Invalid model name. Expected 'OPT_125m', 'OPT_1.3B', 'OPT_6.7B', 'LLaMA_7B', 'LLaMA_13B', 'CodeLLaMA_7B', \ + 'CodeLLaMA_13B', 'StarCoder', 'LLaVA_7B', or 'VILA_7B'." ) # Check quantization method @@ -274,9 +279,11 @@ def _quantize_model( print(f"Quantization of layer {idx} finished.") - # LLaMA - elif model_name.startswith("LLaMA") or model_name.startswith("CodeLLaMA"): - if model_name.startswith("LLaMA_7B") or model_name.startswith("CodeLLaMA_7B"): + # LLaMA / LLaVA / VILA + elif model_name.startswith("LLaMA") or model_name.startswith("CodeLLaMA") or model_name.startswith("LLaVA") \ + or model_name.startswith("VILA"): + if model_name.startswith("LLaMA_7B") or model_name.startswith("CodeLLaMA_7B") or model_name.startswith("LLaVA_7B") \ + or model_name.startswith("VILA_7B"): embed_dim = 4096 hidden_dim = 11008 elif model_name.startswith("LLaMA_13B") or model_name.startswith("CodeLLaMA_13B"): @@ -285,10 +292,17 @@ def _quantize_model( else: raise NotImplementedError(f"{model_name} not supported.") - if model_name.startswith("LLaMA_7B") or model_name.startswith("LLaMA_13B"): + if model_name.startswith("LLaMA_7B") or model_name.startswith("LLaMA_13B") or model_name.startswith("LLaVA_7B"): vocab_size = 32000 + elif model_name.startswith("VILA_7B"): + vocab_size = 32001 elif model_name.startswith("CodeLLaMA_7B") or model_name.startswith("CodeLLaMA_13B"): vocab_size = 32016 + + if model_name.startswith("LLaVA_7B") or model_name.startswith("VILA_7B"): + max_seq_len = 4096 + else: + max_seq_len = 2048 # Quantize lm_head file_path = f"{prefix}" @@ -386,14 +400,14 @@ def _quantize_model( if file_size_bytes % bytes_per_element != 0: raise ValueError(f"Invalid file size of {weight_path}. Expected multiple of element number.") array_size = file_size_bytes // bytes_per_element - _write_fp16_to_file(os.path.join(output_path, weight_path), weight_path, array_size, 1, 2048, 128) - # cos_cached.bin + _write_fp16_to_file(os.path.join(output_path, weight_path), weight_path, array_size, 1, max_seq_len, 128) + # sin_cached.bin weight_path = f"{file_path}/sin_cached.bin" file_size_bytes = os.path.getsize(weight_path) if file_size_bytes % bytes_per_element != 0: raise ValueError(f"Invalid file size of {weight_path}. Expected multiple of element number.") array_size = file_size_bytes // bytes_per_element - _write_fp16_to_file(os.path.join(output_path, weight_path), weight_path, array_size, 1, 2048, 128) + _write_fp16_to_file(os.path.join(output_path, weight_path), weight_path, array_size, 1, max_seq_len, 128) file_path = f"{prefix}/decoder/layer{idx}/self_attn/qk_bmm" weight_path = f"{file_path}/alpha.bin" file_size_bytes = os.path.getsize(weight_path) diff --git a/llm/tools/vila_exporter.py b/llm/tools/vila_exporter.py new file mode 100644 index 00000000..357b2f5d --- /dev/null +++ b/llm/tools/vila_exporter.py @@ -0,0 +1,175 @@ +"""Implementation of exporting VILA PyTorch model to TinyChatEngine format. + +Usage: + python vila_exporter.py + +Example commandline: + python tools/vila_exporter.py --model models/vila-7b --output models/VILA_7B +""" + +import argparse +import math +import os +import struct +import torch +from transformers import AutoProcessor, AutoModelForCausalLM, AutoConfig +from llava.conversation import SeparatorStyle, conv_templates +from llava.eval.utils import preprocess_image +from llava.model import * +from llava.model.utils import KeywordsStoppingCriteria +from llava.model.visual_attn_scale import new_attention_forward +from llava.utils import disable_torch_init + +@torch.no_grad() +def _export_model(model, prefix): + + outpath = prefix + os.makedirs(outpath, exist_ok=True) + with open(os.path.join(f"{outpath}", "lm_head.bin"), "wb") as f: + f.write(model.lm_head._parameters["weight"].cpu().float().numpy().tobytes()) + _export_llama_model(model.model, os.path.join(f"{outpath}", "decoder")) + + # Export to Clip's folder "models/CLIP_ViT_Large" + _export_mm_projector(model.model.mm_projector, f"models/CLIP_ViT_Large/mm_projector") + + +def _export_mm_projector(mm_projector, prefix): + outpath = prefix + os.makedirs(outpath, exist_ok=True) + with open(os.path.join(f"{outpath}", "weight.bin"), "wb") as f: + f.write(mm_projector.weight.cpu().float().numpy().tobytes()) + with open(os.path.join(f"{outpath}", "bias.bin"), "wb") as f: + f.write(mm_projector.bias.cpu().float().numpy().tobytes()) + + +def _export_embed_tokens(embed_tokens, prefix): + outpath = prefix + os.makedirs(outpath, exist_ok=True) + with open(os.path.join(f"{outpath}", "weight.bin"), "wb") as f: + f.write(embed_tokens.weight.cpu().float().numpy().tobytes()) + + +def _export_llama_model(model, prefix): + outpath = prefix + os.makedirs(outpath, exist_ok=True) + + _export_embed_tokens(model.embed_tokens, os.path.join(outpath, "embed_tokens")) + _export_LlamaRMSNorm(model.norm, os.path.join(outpath, "norm")) + for idx, layer in enumerate(model.layers): + _export_llama_layer(layer, os.path.join(outpath, f"layer{idx}")) + + +def _export_LlamaRMSNorm(op, prefix): + outpath = prefix + os.makedirs(outpath, exist_ok=True) + with open(os.path.join(f"{outpath}", "weight.bin"), "wb") as f: + f.write(op.weight.cpu().float().numpy().tobytes()) + + +def _export_llama_layer(layer, prefix): + outpath = prefix + os.makedirs(outpath, exist_ok=True) + _export_attention_params(layer.self_attn, os.path.join(outpath, "self_attn")) + _export_LlamaRMSNorm(layer.input_layernorm, os.path.join(outpath, "input_layernorm")) + _export_LlamaRMSNorm( + layer.post_attention_layernorm, + os.path.join(outpath, "post_attention_layernorm"), + ) + _export_linearfp(layer.mlp.gate_proj, os.path.join(outpath, "gate_proj")) + _export_linearfp(layer.mlp.down_proj, os.path.join(outpath, "down_proj")) + _export_linearfp(layer.mlp.up_proj, os.path.join(outpath, "up_proj")) + + +def _export_linearfp(op, prefix): + outpath = prefix + os.makedirs(outpath, exist_ok=True) + with open(os.path.join(f"{outpath}", "weight.bin"), "wb") as f: + f.write(op._parameters["weight"].cpu().float().numpy().tobytes()) + + +def _export_rotaryEmbedding(op, prefix): + outpath = prefix + os.makedirs(outpath, exist_ok=True) + with open(os.path.join(f"{outpath}", "cos_cached.bin"), "wb") as f: + f.write(op.cos_cached.cpu().float().numpy().tobytes()) + with open(os.path.join(f"{outpath}", "sin_cached.bin"), "wb") as f: + f.write(op.sin_cached.cpu().float().numpy().tobytes()) + + +def _export_BMM_F32T(alpha, prefix): + outpath = prefix + os.makedirs(outpath, exist_ok=True) + with open(os.path.join(f"{outpath}", "alpha.bin"), "wb") as f: + f.write(struct.pack("f", alpha)) + + +def _export_attention_params(attn, prefix: str): + outpath = prefix + os.makedirs(outpath, exist_ok=True) + _export_linearfp(attn.k_proj, os.path.join(outpath, "k_proj")) + _export_linearfp(attn.v_proj, os.path.join(outpath, "v_proj")) + _export_linearfp(attn.q_proj, os.path.join(outpath, "q_proj")) + _export_linearfp(attn.o_proj, os.path.join(outpath, "o_proj")) + qk_bmm_alpha = 1 / math.sqrt(attn.head_dim) + _export_BMM_F32T(qk_bmm_alpha, os.path.join(outpath, "qk_bmm")) + _export_rotaryEmbedding(attn.rotary_emb, os.path.join(outpath, "rotary_emb")) + + +def main(): + """Export a VILA model to TinyChatEngine format.""" + parser = argparse.ArgumentParser(description="export VILA pytorch model to TinyChatEngine format.") + parser.add_argument("--hf_path", type=str, help="Path to huggingface model hub", default=None) + parser.add_argument("--model", type=str, help="Path of the VILA torch model") + parser.add_argument("--output", type=str, help="Output directory of the exported model") + + args = parser.parse_args() + + if args.hf_path is None: + if not os.path.exists(args.model): + print(f"The model path '{args.model}' does not exist.") + return + + if not os.path.exists(args.output): + print(f"The output path '{args.output}' does not exist. Creating a new directory...") + os.makedirs(args.output, exist_ok=True) + + print("Loading model...") + if args.model.endswith(".pt"): + if args.model.split("/")[-1].lower().startswith("vila"): + if args.model.split("-")[1].lower() == "7b": + print("Loading VILA 7B model...") + # config = AutoConfig.from_pretrained("Efficient-Large-Model/vila-7b", trust_remote_code=True) + # processor = AutoProcessor.from_pretrained("Efficient-Large-Model/vila-7b") + # model = AutoModelForCausalLM.from_pretrained("Efficient-Large-Model/vila-7b", config=config, torch_dtype=torch.float16, low_cpu_mem_usage=True, trust_remote_code=True, offload_state_dict=True) + config = AutoConfig.from_pretrained("/home/wweichen/workspace/models/LLM/vila-7b", trust_remote_code=True) + # processor = AutoProcessor.from_pretrained("/home/wweichen/workspace/models/LLM/vila-7b") + model = AutoModelForCausalLM.from_pretrained("/home/wweichen/workspace/models/LLM/vila-7b", config=config, torch_dtype=torch.float16, low_cpu_mem_usage=True, trust_remote_code=True, offload_state_dict=True) + elif args.model.split("-")[1].lower() == "13b": + print("Loading VILA 13B model...") + config = AutoConfig.from_pretrained("/home/wweichen/workspace/models/LLM/vila-13b", trust_remote_code=True) + # processor = AutoProcessor.from_pretrained("/home/wweichen/workspace/models/LLM/vila-13b") + model = AutoModelForCausalLM.from_pretrained("/home/wweichen/workspace/models/LLM/vila-13b", config=config, torch_dtype=torch.float16, low_cpu_mem_usage=True, trust_remote_code=True, offload_state_dict=True) + else: + print("Model size not supported.") + return + else: + print("Model type not supported.") + return + + model.load_state_dict(torch.load(args.model)) + else: + config = AutoConfig.from_pretrained(args.model, trust_remote_code=True) + # processor = AutoProcessor.from_pretrained(args.model) + # model = AutoModelForCausalLM.from_pretrained(args.model, config=config, torch_dtype=torch.float32, low_cpu_mem_usage=True, trust_remote_code=True, offload_state_dict=True) + model = LlavaLlamaForCausalLM.from_pretrained(args.model, torch_dtype=torch.float32, low_cpu_mem_usage=True, trust_remote_code=True, offload_state_dict=True) + else: + # processor = AutoProcessor.from_pretrained(args.hf_path) + model = AutoModelForCausalLM.from_pretrained(args.hf_path, torch_dtype=torch.float16) + + print("Start exporting VILA model...") + _export_model(model, args.output) + print("Finished exporting VILA model.") + + +if __name__ == "__main__": + main() diff --git a/requirements.txt b/requirements.txt index 2c8b74eb..c56506df 100644 --- a/requirements.txt +++ b/requirements.txt @@ -1,2 +1,5 @@ requests -tqdm \ No newline at end of file +tqdm +torch +transformers +pillow \ No newline at end of file