https://bugs.freedesktop.org/show_bug.cgi?id=61091
Priority: medium
Bug ID: 61091
Keywords: regression
CC: mar...@gmail.com
Assignee: mesa-dev@lists.freedesktop.org
Summary: piglit glsl-fs-texture2drect regression
Severity: normal
Classification: Unclassified
OS: Linux (All)
Reporter: v...@freedesktop.org
Hardware: x86-64 (AMD64)
Status: NEW
Version: git
Component: Mesa core
Product: Mesa
mesa: 07cdfdb708ac28aa487a738db30b128cb0df1dc3 (master)
$ ./bin/glsl-fs-texture2drect -auto
Probe at (37,37)
Expected: 1.000000 0.000000 0.000000
Observed: 1.000000 1.000000 1.000000
PIGLIT: {'result': 'fail' }
0a1479c829ed34a65e60c6619a8164e1b079aaee is the first bad commit
commit 0a1479c829ed34a65e60c6619a8164e1b079aaee
Author: Marek Olšák <mar...@gmail.com>
Date: Thu Feb 14 01:03:55 2013 +0100
st/mesa: implement blit-based TexImage and TexSubImage
A temporary texture is created such that it matches the format and type
combination and pixels are copied to it using memcpy. Then the blit is used
to
copy the temporary texture to the texture image being modified by TexImage
or
TexSubImage. The blit takes care of the format and type conversion and
swizzling. The result is a very fast texture upload involving as little CPU
as possible.
This improves performance in apps which upload textures during rendering.
An example is the Wine OpenGL backend for DirectDraw, which I used to test
the game StarCraft. Profiling had shown that TexSubImage was taking 50% of
CPU time without this patch, which was the main motivation for this work,
and
now TexSubImage only takes 14% of CPU time. I had to underclock my CPU to
see
any difference in the game and this patch does make the game a lot faster
if the CPU is slow (or using the powersave cpufreq profile).
Reviewed-by: Brian Paul <bri...@vmware.com>
:040000 040000 15f59d627914f821f5c58d91645e765c16dee900
9556e542ef992b9d4d1aca566b96e31e715d3999 M src
bisect run success
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