[Bug 76978] New: glBlendFuncSeparatei (IrisPro with Mesa DRI / 3.0 Mesa 10.0.1)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76978

          Priority: medium
            Bug ID: 76978
          Assignee: idr at freedesktop.org
           Summary: glBlendFuncSeparatei (IrisPro with Mesa DRI / 3.0 Mesa
                    10.0.1)
        QA Contact: intel-3d-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: bk at f-m.fm
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: 10.0
         Component: Drivers/DRI/i965
           Product: Mesa

Mesa reports availability of ARB_draw_buffers_blend but glBlendFuncSeparatei
fails with GL_INVALID_OPERATION.

HW is BrixPro with i7-4770R with SteamOS (Mesa DRI / 3.0 Mesa 10.0.1).

To reproduce bug:

    git clone git://github.com/bkaradzic/bx.git
    git clone git://github.com/bkaradzic/bgfx.git
    cd bgfx
    ../bx/tools/linux/bin/premake4 --file=premake/premake4.lua --gcc=linux-gcc
gmake
    make -C .build/projects/gmake-linux config=debug64 example-19-oit
    cd examples/runtime
    ../../.build/linux64_gcc/bin/example-18-oitDebug

Switch to MRT option, and you will get (MESA_DEBUG=verbose):
"Mesa: User error: GL_INVALID_OPERATION in unsupported function called
(unsupported extension or deprecated function?)"

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