[PATCH 4/7] wined3d: Initialize unwritten texcoord varyings in the VS.

[Stefan Dösinger]

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Am 2015-10-05 um 13:01 schrieb Henri Verbeet:
> Does that include partially written coordinates? I'm fairly sure
> there were applications that cared about this. It may have been
> Half-Life 2 (which is probably totally different today) or some
> other Source Engine game. Maybe Stefan remembers. I suppose we
> could also just try if anything breaks if we change it, although in
> that case we could get rid of WINED3D_QUIRK_SET_TEXCOORD_W as
> well.
That problem was about the fixed function pipeline. A vertex shader
wrote a partial texcoord, and fixed fucntion fragment processing was
used. Normally GL always divides by .w, so it caused problems. ARBfp,
GLSL and ATIfs can disable the .w divide, so the undefined content in
.w doesn't matter.


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