[Bug 91847] glGenerateTextureMipmap not working (no errors) unless glActiveTexture(GL_TEXTURE1) is called

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91847

            Bug ID: 91847
           Summary: glGenerateTextureMipmap not working (no errors) unless
                    glActiveTexture(GL_TEXTURE1) is called
           Product: Mesa
           Version: 10.6
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: eliashogstvedt at gmail.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

On #dri-devel fredrikh pointed out that the problem might be in meta here:

http://cgit.freedesktop.org/mesa/mesa/tree/src/mesa/drivers/common/meta_generate_mipmap.c?id=mesa-10.6.3#n205

as a suggested workaround calling glActiveTexture(GL_TEXTURE1) before calling
glGenerateTextureMipmap() works.

In my project I have a DSA wrapper when DSA is not available and that seems to
work just fine.

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