[Bug 108794] Inconsistent behavior with Separable Shaders (ARB_separate_shader_objects)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108794

            Bug ID: 108794
           Summary: Inconsistent behavior with Separable Shaders
                    (ARB_separate_shader_objects)
           Product: Mesa
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: epigramx at yahoo.com
        QA Contact: dri-devel at lists.freedesktop.org

When running Cemu, (an OpenGL application under wine), it appears there is
inconsistent behavior with their feature "Separable Shaders".

a) When BotW runs, and SS is off, the "tent" of some Stables may be invariably
culled off the scene (along with a few other textures).

b) In contrast, when SS is on, it causes the lighting in some Shrines to be
oversaturated.

Hardware: AMD R9 290, Intel Haswell
Software: Kernel 4.18.19, latest libdrm, current mesa repo source, llvm 8 from
their site's repo for debian sid.

tl;dr: In any case, there appears to be inconsistent behavior on results of
separable shaders being used or not when the same methods seem to work on
Windows. I do not have access to the source of the test software to investigate
further and I have not debugged mesa calls further (and I probably won't).

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