canvasimpl (set pixels only at the moment)

haxe/ui/backend/ComponentGraphicsImpl.hx

@@ -1,4 +1,65 @@
 package haxe.ui.backend;
 
+import flixel.FlxSprite;
+import haxe.io.Bytes;
+import haxe.ui.core.Component;
+import openfl.display.BitmapData;
+import openfl.geom.Rectangle;
+import openfl.utils.ByteArray;
+
 class ComponentGraphicsImpl extends ComponentGraphicsBase {
+    private var _hasSize:Bool = false;
+    private var bitmapData:BitmapData = null;
+    private var sprite:FlxSprite;
+
+    public override function setPixels(pixels:Bytes) {
+        if (_hasSize == false) {
+            return super.setPixels(pixels);
+        }
+
+        var w = Std.int(_component.width);
+        var h = Std.int(_component.height);
+
+        if (bitmapData == null) {
+            bitmapData = new BitmapData(w, h, true, 0x00000000);
+        }
+
+        // convert RGBA -> ARGB (well, actually BGRA for some reason)
+        var bytesData = pixels.getData();
+        var length:Int = pixels.length;
+        var newPixels = Bytes.alloc(length);
+        var i:Int = 0;
+        while (i < length) {
+            var r = Bytes.fastGet(bytesData, i + 0);
+            var g = Bytes.fastGet(bytesData, i + 1);
+            var b = Bytes.fastGet(bytesData, i + 2);
+            var a = Bytes.fastGet(bytesData, i + 3);
+            newPixels.set(i + 0, b);
+            newPixels.set(i + 1, g);
+            newPixels.set(i + 2, r);
+            newPixels.set(i + 3, a);
+            i += 4;
+        }
+        var byteArray = ByteArray.fromBytes(newPixels);
+        bitmapData.setPixels(new Rectangle(0, 0, bitmapData.width, bitmapData.height), byteArray);
+
+        if (this.sprite == null) {
+            sprite = new FlxSprite(0, 0);
+            _component.add(sprite);            
+        }
+
+        sprite.width = w;
+        sprite.height = h;
+
+        this.sprite.pixels = bitmapData;
+    }
+
+    public override function resize(width:Null<Float>, height:Null<Float>) {
+        if (width > 0 && height > 0) {
+            if (_hasSize == false) {
+                _hasSize = true;
+                replayDrawCommands();
+            }
+        }
+    }
 }