wglGetPixelFormatAttribivARB unexpected RenderType(100)

Toan T Nguyen nguyenthetoan at gmail.com
Mon Dec 5 16:53:59 CST 2005

Hi, thanks for the clarification. Everything is fine then. Thank you
for the patch.

BTW, do you know how to improve OpenGL performance in wine? I get
about 10-30% drop in FPS compared to the Windows version (the card is
overclocked about 10% both in CPU and memory frequencies in windows,
so that might explains some of the performance drop). I set UseDGA to
Y in "wine regedit" but that doesn't seem to help at all.

Thanks again,

> WGL_COLOR_BITS_ARB cannot be 32 (was a bug i have corrected recently)
> see http://www.nvidia.com/dev_content/nvopenglspecs/WGL_ARB_pixel_format.txt
>    *     The number of color bitplanes in each color buffer. For RGBA
>    *     pixel types, it is the size of the color buffer, excluding the
>    *     alpha bitplanes. For color-index pixels, it is the size of the
>    *     color index buffer.
> So for 32 bits FBConfig, it should be 24 (8 bits per RGB channels) + 8 for
> Alpha channel
> If Q2E expect 32 bits for WGL_COLOR_BITS_ARB its a bug :)
> And 24 bits limitation is a X limitation (X display cannot support
> alpha-channel) not an ATI limitation.
> Anyway, 24 bits displays usually support 32 bits using GLX :)
> > Toan
> Regards,
> Raphael

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