[Bug 12453] Bad performance in Source based games

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=12453





--- Comment #15 from H. Verbeet <hverbeet at gmail.com>  2009-01-06 06:45:02 ---
(In reply to comment #14)
> If I'm following that patch correctly, then it simply disables support for the
> SRGB_TEXTURE sampler state, which seems to overly brighten everything when
> applied to Warhammer Online (which seems to suffer the same bug except in
> texture, not cubetexture.). I guess that makes sense, since it's disabling the
> sRGB->linear conversion in the texture sampler, since linear values are lower
> than the sRGB value for the same colour. (Assuming I've got sRGB correct...)
> 
> If I'm understanding the code and specs correctly, then the problem is that D3D
> lets the sampler have sRGB->linear conversion turned on and off whenever it
> likes, while OpenGL requires a reload of the relevant texture with a different
> format.
> 
Yeah, that's pretty much the problem. We could speed it up a bit by duplicating
the textures and having a regular and sRGB version, but that does mean using
twice the memory for some textures. Unfortunately it's not like the driver has
lots of address space to spare either.


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