http://bugs.freedesktop.org/show_bug.cgi?id=13652
Summary: [i915 TTM] texture with GL_ALPHA format applied
incorrectly with blending
Product: Mesa
Version: unspecified
Platform: Other
OS/Version: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: Drivers/DRI/i915
AssignedTo: [email protected]
ReportedBy: [EMAIL PROTECTED]
CC: [EMAIL PROTECTED]
System Environment:
--------------------------
--Platform: FC6
--Xf86_video_intel:6f92200db39a790c95c1fac64baf0bd41a70e481
--Mesa:e2ca788ae700aae75bf8d024c1374c38cc5574f9
--DRM:f1a99ddc14ebca303f20b6c23bd289fc887243ae
--Kernel:2.6.22
Bug detailed description:
--------------------------
This issue doesn't happen when INTEL_NO_TTM is set
And this issue doesn't happen on 965 platform
create a texture with GL_ALPHA format
set glBlendFunc(GL_ZERO, GL_SRC_ALPHA); and enabled glEnable(GL_BLEND);
render a polygon with this texture, but the alpha component turns out incorrect
Reproduce steps:
----------------
start X
compile and run the attached test case
Current result:
----------------
the alpha component is not correct
Expected result:
----------------
the alpha component should be correct
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