[Bug 12453] Bad performance in Source based games

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

--- Comment #30 from Paul "TBBle" Hampson   2009-05-13 05:03:41 ---
Looking at Left4Dead's activity, the main culprit for 'Downloading rgb texture
to reload it as srgb' appears to be a texture that matches the window size,
reloaded every frame, and with WINED3DUSAGE_RENDERTARGET set.

This suggests to my limited understanding that they're rendering the whole
scene out in RGB to a texture, and then redrawing it to the screen in SRGB,
which is why this bug has such a large effect on framerate.