just came accross that when using wgl often the all the window configs etc. are set before loading the OpenGL adresses, because in these cases different OpenGL function adresses are loaded by wglGetProcAddress.
Is that the same with eglGetProcAddress and OpenGL ES in the Catalyst drivers?
If not, or if eglGetProcAddress shall not be used to retrieve the OpenGL ES core functions (as specified by Khronos), how else can it be done?
Maybe here lies the performance issue.
but obviously driver bug found:
The problem was that vertical sync was on, and with imagination a wrong value was measured. Catalyst OpenGL ES implementation is about 200% faster in my case. Nevertheless: i used eglSwapBuffers(0) and in CCC i turned Vsync to always off, and it didn't show any effect. But when I applied the setting with ATI Tray tools suddenly the desired effect was achieved.
And another driver bug: When switching textures on a framebuffer with glFramebufferTexture2D it just showed an effect on the first texture, afterwards i always got a black texture, except when i switched back to the first one. But suddenly when querying the framebuffer status with glCheckFramebufferstatus every frame after binding the framebuffer, it worked.
AMD please fix this.