[Mesa-dev] [Bug 94657] [llvmpipe] [softpipe] piglit arb_texture_view-getteximage-srgb regression

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94657

            Bug ID: 94657
           Summary: [llvmpipe] [softpipe] piglit
                    arb_texture_view-getteximage-srgb regression
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Keywords: bisected, regression
          Severity: normal
          Priority: medium
         Component: Mesa core
          Assignee: mesa-dev at lists.freedesktop.org
          Reporter: vlee at freedesktop.org
        QA Contact: mesa-dev at lists.freedesktop.org
                CC: maraeo at gmail.com, nhaehnle at gmail.com

mesa: 1e8435ce0cce671024ebf9c5465ea8bdcb563b69 (master 11.3.0-devel)

$ ./bin/arb_texture_view-getteximage-srgb -auto
Wrong color for GL_SRGB8_ALPHA8 texture view.
Expected 0xff0000ff but found 0x0000ffff 
PIGLIT: {"result": "fail" }

a8eea696b8966d119e213d532158f63c5b280740 is the first bad commit
commit a8eea696b8966d119e213d532158f63c5b280740
Author: Nicolai Hähnle <nicolai.haehnle at amd.com>
Date:   Mon Mar 14 15:33:34 2016 -0500

    st/mesa: honour sized internal formats in st_choose_format (v2)

    The bitcasting which is possible with shader images (and texture views?)
    requires that when the user specifies a sized internal format for a
    texture, we really allocate that format. To this end:

    (1) find_exact_format should ignore sized internal formats and

    (2) some of the entries in the mapping table corresponding to sized
        internal formats are reordered to use an RGBA format instead of
        a BGRA one.

    This fixes arb_shader_image_load_store-bitcast in the (work in progress)
    ARB_shader_image_load_store implementation for radeonsi.

    v2: don't change the mapping of GL_RGB10: the change caused a regression
        because it preferred a format with an alpha channel, and GL_RGB10
        is not among the supported formats for shader images

    Reviewed-by: Marek Olšák <marek.olsak at amd.com>

:040000 040000 572b09e6a4cec5c7267d43ecfe6e497775faf753
77f5d9b5f75285074cc89652de547f5129ea1b99 M    src
bisect run success

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