Bug 42385 - VG_COLOR_TRANSFORM ignores alpha channel if egl config is without alpha for drawing paths
Summary: VG_COLOR_TRANSFORM ignores alpha channel if egl config is without alpha for d...
Alias: None
Product: Mesa
Classification: Unclassified
Component: Other (show other bugs)
Version: git
Hardware: x86 (IA32) Windows (All)
: medium normal
Assignee: mesa-dev
QA Contact:
Depends on:
Reported: 2011-10-29 13:09 UTC by Andreas Betz
Modified: 2019-09-18 20:16 UTC (History)
0 users

See Also:
i915 platform:
i915 features:


Description Andreas Betz 2011-10-29 13:09:18 UTC
If you set the egl config like the following:
        conflist[i++] = EGL_RED_SIZE;
        conflist[i++] = 8;

        conflist[i++] = EGL_GREEN_SIZE;
        conflist[i++] = 8;

        conflist[i++] = EGL_BLUE_SIZE;
        conflist[i++] = 8;

        conflist[i++] = EGL_ALPHA_SIZE;
        conflist[i++] = 0;

And you try to transform with a color (like 0x11223344) then the alpha part of it is skipped.

This is in contrary to the Khronos reference implementation.

(I have to admit for images it seems to work nearly correctly - i will make another ticket for an other issue.)
Comment 1 GitLab Migration User 2019-09-18 20:16:57 UTC
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