[1/2] wined3d: Report post pixelshader blending on WINED3DFMT_A16B16G16R16F

[Roderick Colenbrander]

> 2008/6/23 Roderick Colenbrander <thunderbird2k at gmx.net>:
> > Hi,
> >
> > I don't think we should implement it this way. For instance on GeforceFX
> cards blending is performed in software. Not too long ago (before 1.0) I
> also sent a patch for this e.g. by doing an extension check. I think I
> checked for ARB_color_buffer_float in combination with half pixel support.
> >
> The format already requires ARB_HALF_FLOAT_PIXEL, which is supported
> by GF FX. The format also requires ARB_TEXTURE_FLOAT to work properly,
> which as far as I can see from the list at Delphi3D isn't supported by
> GF FX. The next patch adds this extension check. Wrt
> ARB_COLOR_BUFFER_FLOAT, I'm not sure how it would imply post ps
> blending support?

The extension itself doesn't imply it but since it isn't supported on hardware like the GeforceFX which doesn't offer it. Further Ati offers blending on Radeon >= 9500 GPUs and offers the extension ARB_COLOR_BUFFER_FLOAT. Not sure if they offer half pixel though.

Roderick
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