[Mesa-dev] [Bug 52282] New: [softpipe] piglit arb_shader_texture_lod-texgrad regression

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=52282

             Bug #: 52282
           Summary: [softpipe] piglit arb_shader_texture_lod-texgrad
                    regression
    Classification: Unclassified
           Product: Mesa
           Version: git
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Other
        AssignedTo: mesa-dev at lists.freedesktop.org
        ReportedBy: vlee at freedesktop.org
                CC: galibert at pobox.com


Created attachment 64410
  --> https://bugs.freedesktop.org/attachment.cgi?id=64410
arb_shader_texture_lod-texgrad.png

mesa: a8c092266e9885f3370bbeae15bd80ebf035d05d (master)

Run piglit arb_shader_texture_lod-texgrad on softpipe.

$ ./bin/arb_shader_texture_lod-texgrad -auto
Mesa warning: failed to remap index 173
Left: texture2D, Right: texture2DGradARB
Probe at (4,3)
  Left: 0.000000 1.000000 0.000000 1.000000
  Right: 0.000000 0.976471 0.000000 1.000000
PIGLIT: {'result': 'fail' }


229a1a7e4da1a9c60b35b79f2a63e0bab451a76e is the first bad commit
commit 229a1a7e4da1a9c60b35b79f2a63e0bab451a76e
Author: Olivier Galibert <galibert at pobox.com>
Date:   Tue Jun 19 21:01:37 2012 +0200

    softpipe: Take all lods into account when texture sampling.

    This patch churns a lot because it needs to change 4-wide filters into
    single pixel filters, since each fragment may use a different filter.

    The only case not entirely supported is the anisotropic filtering.
    Not sure what we want to do there, since a full quad is required by
    that filter.

    Signed-off-by: Olivier Galibert <galibert at pobox.com>
    Reviewed-by: Brian Paul <brianp at vmware.com>

:040000 040000 b097530109abfbb406df16689a45154ba31e72f1
37331d8c61f88d8908f3bd5056fd4a08888a0e3d M      src
bisect run success

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