Re: [Mesa3d-dev] crossbar: read from back buffer, not front.

[Ian R. <id...@fr...>]

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This change isn't correct.  This causes the test to read from the back
buffer after the call to glutSwapBuffers.  The swap buffer call can,
especially on DRI2, cause the backbuffer to be filled with garbage.
This can cause the test to fail when nothing is wrong.

commit eb141ce29ef8d7f411f66afbb323f33e3eac4d80
Author: Dave Airlie <ai...@re...>
Date:   Sat Apr 3 14:53:01 2010 +1000

    crossbar: read from back buffer, not front.

    This test isn't a front buffer readback test so don't fail if front
buffer
    readback has issues.

    Signed-off-by: Dave Airlie <ai...@re...>
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