My opengl program runs only 7 FPS on Radeon 8500. I have trimmed the code so that it only draws a cube with no texturing, no buffer clear, no vertex buffer.
This program can reach over 200 FPS on TNT2, Geforce, G450, etc, with the only exception of 7 FPS on Radeon 8500. I am sure I have installed the latest driver.
This program calls ogl functions in MFC’s CChildView::OnPaint().
BOOL CGLWindow::InitPixel(HDC hdc)
{
PIXELFORMATDESCRIPTOR pfd = {
sizeof(PIXELFORMATDESCRIPTOR), // size of this pfd
1, // version number
PFD_DRAW_TO_WINDOW | // support window
PFD_SUPPORT_OPENGL | // support OpenGL
PFD_DOUBLEBUFFER ,
PFD_TYPE_RGBA, // RGBA type
16, // 24-bit color depth
0, 0, 0, 0, 0, 0, // color bits ignored
0, // no alpha buffer
0, // shift bit ignored
0, // no accumulation buffer
0, 0, 0, 0, // accum bits ignored
32, // 32-bit z-buffer
0, // no stencil buffer
0, // no auxiliary buffer
PFD_MAIN_PLANE, // main layer
0, // reserved
0, 0, 0 // layer masks ignored