[Bug 83908] [i965] Incorrect icon colors in Steam Big Picture

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83908

Ian Romanick <idr at freedesktop.org> changed:

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

--- Comment #3 from Ian Romanick <idr at freedesktop.org> ---
Just pushed to master.  I don't think Neil realized that Cody didn't have
commit access... and then everyone forgot about it.

commit 83e8bb5b1a50c0105b642d559999f07fa64a982f
Author: Cody Northrop <cody at lunarg.com>
Date:   Mon Sep 15 16:14:20 2014 -0600

    i965: Require pixel alignment for GPU copy blit

    The blitter will start at a pixel's natural alignment. For PBOs, if the
    provided offset if not aligned, bits will get dropped.

    This change adds offset alignment check for src and dst, kicking back if
    the requirements are not met.

    The change is based on following verbiage from BSPEC:
     Color pixel sizes supported are 8, 16, and 32 bits per pixel (bpp).
     All pixels are naturally aligned.

    Found in the following locations:
    page 35 of intel-gfx-prm-osrc-hsw-blitter.pdf
    page 29 of ivb_ihd_os_vol1_part4.pdf
    page 29 of snb_ihd_os_vol1_part5.pdf

    This behavior was observed with Steam Big Picture rendering incorrect
    icon colors.  The fix has been tested on Ubuntu and SteamOS on Haswell.

    Signed-off-by: Cody Northrop <cody at lunarg.com>
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=83908
    Reviewed-by: Neil Roberts <neil at linux.intel.com>

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