[Bug 12453] Bad performance in Source based games

[wine-bugs at winehq.org]

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





--- Comment #30 from Paul "TBBle" Hampson <Paul.Hampson at Pobox.com>  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.


--- Comment #31 from Paul "TBBle" Hampson <Paul.Hampson at Pobox.com>  2009-05-13 05:08:51 ---
Created an attachment (id=21072)
 --> (http://bugs.winehq.org/attachment.cgi?id=21072)
Disable SRGB-sampler-tate-triggered texture reloads, against 1.1.21

Here's a hack patch against 1.1.21 or so which should bypass attempts to reload
an RGB texture as an SRGB texture or vice-versa.

Depending on how the texture was first uploaded, it'll either be too bright
(trying to reload RGB as SRGB) or too dark (trying to reload SRGB as RGB).

This patch makes Left4Dead noticeably brighter, and noticeably faster.


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