[Mesa-dev] [Bug 98310] GLES context returned by OpenGL API

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Tue Oct 18 15:01:51 UTC 2016


            Bug ID: 98310
           Summary: GLES context returned by OpenGL API
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: major
          Priority: medium
         Component: EGL
          Assignee: mesa-dev at lists.freedesktop.org
          Reporter: manday at openmail.cc
        QA Contact: mesa-dev at lists.freedesktop.org

The ultimate consequence of this bug is that EPoxy thinks that the current
context is OpenGL, although it is GLES2. It reports this up to GTK/GDK which
then abandones GLES2 rendering (because it thinks OpenGL is being used).

EPoxy tests whether the current context is OpenGL by

epoxy_egl_get_current_gl_context_api( )

in two steps, by first binding the API which is being tested for:


and subsequently testing for a context

if( eglGetCurrentContext( ) ) ...

I don't know whether this is actually a proper way of testing this (or why this
is required by further up in the first place), but I can definitely say I do
NOT have OpenGL (simply because of the lack of X11 libraries and I built Mesa
only with GLES2) but that call, after the OPENGL_API was bound, returns a
context. Which in turn makes Epoxy think that the context is OpenGL.

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