[Bug 77856] [BDW]Piglit spec_OpenGL_3.0_clearbuffer-mixed-format fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=77856

Kenneth Graunke <kenneth at whitecape.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED

--- Comment #2 from Kenneth Graunke <kenneth at whitecape.org> ---
Fixed by:

commit 9701c6984d8d6570d90a15f86872b16bdba117f2
Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Fri May 2 01:10:17 2014 -0700

    meta: Only clear the requested color buffers.

    This path is used to implement both glClear and glClearBuffer; the
    latter is only supposed to clear particular buffers.  Core Mesa provides
    us that information in the buffers bitmask; we must only clear buffers
    mentioned there.

    To accomplish this, we save/restore the color draw buffers state, and
    use glDrawBuffers to restrict drawing to the relevant buffers.

    Fixes Piglit's spec/!OpenGL 3.0/clearbuffer-mixed-formats and
    spec/ARB_framebuffer_object/fbo-drawbuffers-none glClearBuffer tests
    for drivers using meta clears (such as Broadwell).

    Cc: "10.2" <mesa-stable at lists.freedesktop.org>
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=77852
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=77856
    Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
    Reviewed-by: Anuj Phogat <anuj.phogat at gmail.com>
    Reviewed-by: Eric Anholt <eric at anholt.net>

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