Update README again

README.md

@@ -1,6 +1,16 @@
 # Linux-VR-Compositor-Dev
 
-This is preview release ! (WIP)
+Still experimental !
+
+------------------------------
+
+EGL 1.5 is required + 3 extensions :
+- [EGL_MESA_drm_image](https://www.khronos.org/registry/EGL/extensions/MESA/EGL_MESA_drm_image.txt)
+- [EGL_MESA_image_dma_buf_export](https://www.khronos.org/registry/EGL/extensions/MESA/EGL_MESA_image_dma_buf_export.txt)
+- [EGL_EXT_image_dma_buf_import](https://www.khronos.org/registry/EGL/extensions/EXT/EGL_EXT_image_dma_buf_import.txt)
+
+No OpenGL version requirement, just one extension required :
+- [OES_EGL_image](https://www.khronos.org/registry/OpenGL/extensions/OES/OES_EGL_image.txt)
 
 ------------------------------
 
@@ -8,15 +18,8 @@ NOTE :
 
 openglexample from [OpenHMD](https://github.com/OpenHMD/OpenHMD)
 
-Currently requires 3 EGL extensions + 1 OpenGL extensions :
-https://www.khronos.org/registry/EGL/extensions/MESA/EGL_MESA_drm_image.txt
-https://www.khronos.org/registry/EGL/extensions/MESA/EGL_MESA_image_dma_buf_export.txt
-https://www.khronos.org/registry/EGL/extensions/EXT/EGL_EXT_image_dma_buf_import.txt
-https://www.khronos.org/registry/OpenGL/extensions/OES/OES_EGL_image.txt
-
 ------------------------------
 
-
 ```C
 #define GL_GLEXT_PROTOTYPES
 #include <GL/gl.h> // must include OpenGL before including the Linux VR Compositor header
@@ -35,23 +38,22 @@ void main()
   struct lvrcInstance * compositor = lvrcCreateInstance(hmd);
 
   //
-  // Initialize Linux VR Compositor SwapChain
+  // Initialize your OpenGL context using as usual
-  bool bSwapChainCreated = lvrcInitSwapChain(compositor);
+  // Note that only EGL is supported right now
+  EGLDisplay display = eglGetDisplay(...);
+  EGLContext context = eglCreateContext(display, ...);
+  EGLSurface surface = eglCreateWindowSurface(display, ...);
+  eglMakeCurrent(display, surface, surface, context);
+  
+  //
+  // Initialize HMD rendering
+  bool bRenderingInit = lvrcInitRenderingEGL(compositor, gl.egl_display, gl.egl_context, gl.egl_surface);
 
   //
-  // Initialize OpenGL using EGL
+  // Initialize the Swap Chain (currently 2 textures)
-  // This is mostly as usual, the only change is that you must use the provided NativeDisplay/NativeWindow
+  GLuint textures [2];
-  EGLDisplay display = eglGetDisplay(lvrcSwapChainGetNativeDisplay(compositor));
+  bool bSwapChainCreated = lvrcInitSwapChain(compositor, width, height, textures);
-  EGLContext context = eglCreateContext(display, ...);
+    
-  EGLSurface surface = eglCreateWindowSurface(display, lvrcSwapChainGetNativeWindow(compositor), ...);
-  
-  eglMakeCurrent(display, surface, surface, >context);
-  
-  //
-  // The compositor needs to create some resources that will be used during frame composition
-  // NOTE : the EGL context MUST be bound when calling this function
-  bool bCompositorInit = lvrcInitFrameResources(compositor);
-  
   //
   // Main Loop
   while (true)
@@ -61,24 +63,19 @@ void main()
     lvrcBeginFrame(compositor);
   
     ... // Render to left & right textures as usual
-    
-    lvrcSubmitFrameLeft(compositor, left_texture);
-    
-    lvrcSubmitFrameRight(compositor, right_texture);
 
     eglSwapBuffers(display, surface); // Swap buffers as usual
     
     lvrcEndFrame(compositor);
   }
 
-  lvrcReleaseFrameResources(compositor);
+  lvrcReleaseSwapChain(compositor);
 
   // You should destroy your EGL context here
   
-  lvrcReleaseSwapChain(compositor);
-
   lvrcDestroyInstance(compositor);
   
   ohmd_ctx_destroy(ctx);
 }
 ```
+