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

[Roderick Colenbrander]

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.

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

[H. Verbeet]

2008/6/23 Roderick Colenbrander <thunderbird2k(a)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?

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

[Roderick Colenbrander]

> 2008/6/23 Roderick Colenbrander <thunderbird2k(a)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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