Gsoc2024 basic viewer glfw tgrillon

Basic_viewer/doc/Basic_viewer/Basic_viewer.txt

@@ -131,7 +131,7 @@ Example of drawing of a point cloud and a polyhedron in a same viewer.
 \cgalFigureEnd
 
 <!-- /////////////////////////////////////////////////////////////////////////////// -->
-\section BV_BasicViewer The Basic Viewer Class
+\section BV_BasicViewer The Qt Basic Viewer Class
 
 The class `CGAL::Qt::Basic_viewer` is a \qt widget that inherits from `QGLViewer` and mainly stores a `Graphics_scene` and allows to visualize it and interact with the scene. Since this class is a \qt widget, it can be used into more complex \qt code to create more advanced demos.
 
@@ -145,6 +145,23 @@ The result of this example is shown in \cgalFigureRef{basic_viewer_ex5}.
 Example of drawing of two `Basic_viewer` side by side.
 \cgalFigureEnd
 
+<!-- /////////////////////////////////////////////////////////////////////////////// -->
+
+\section BV_GLFW_BasicViewer The GLFW Basic Viewer Class
+
+The class CGAL::GLFW::Basic_viewer is a lightweight, cross-platform viewer built using GLFW, designed for visualizing and interacting with a Graphics_scene. Unlike the Qt-based viewer, this class does not depend on Qt and is suitable for applications where minimal dependencies and straightforward rendering are desired.
+
+In the following example, we create a graphics scene for surface mesh height. Instead of using `show()` to render the scene, we call `make_screenshot()`. This method allows rendering without the need for user interaction. It will save the drawn frame as an image. Before calling this method, we can set different scene parameters such as camera and clipping plane orientation. 
+
+\cgalExample{Basic_viewer/basic_viewer_glfw_screenshot.cpp}
+
+The result of this example is shown in \cgalFigureRef{basic_viewer_glfw_screenshot_example}.
+
+\cgalFigureBegin{basic_viewer_glfw_screenshot_example,basic_viewer_glfw_screenshot.png} 
+Example of a screenshot generated by the Basic_viewer. 
+\cgalFigureEnd
+
+This feature does not work with Wayland. 
 
 <!-- /////////////////////////////////////////////////////////////////////////////// -->
 \section BV_Interactions Adding Interaction
@@ -168,6 +185,7 @@ Two examples of drawing of a mesh with small faces in red. <B>Left</B>: With the
 
 This package was started by Mostafa Ashraf during his 2022 GSoC project. Guillaume Damiand, who mentored the project, reworked large parts of the package, wrote examples and the manual.
 
+
 */
 
 } /* namespace CGAL */