[Mesa-dev] [Bug 98791] alpha back-and-forth between hot tiles picks up corruption

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98791

            Bug ID: 98791
           Summary: alpha back-and-forth between hot tiles picks up
                    corruption
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/swr
          Assignee: mesa-dev at lists.freedesktop.org
          Reporter: imirkin at alum.mit.edu
        QA Contact: mesa-dev at lists.freedesktop.org

dEQP-GLES2.functional.texture.specification.basic_copytexsubimage2d.2d_alpha

The test sticks some data in via glTexImage2D (into each level), then renders a
gradient to a FB, and then runs glCopyTexSubImage to overwrite part of each
level's data with the new data. It appears that the first 32 pixels of level0
are good, but the next 32, which have the partial copy over them, were
improperly initialized. Like a load was missing?

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