[cairo-bugs] [Bug 74685] New: Test for GL_EXT_bgra in addition to GL_EXT_texture_format_BGRA8888

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=74685

          Priority: medium
            Bug ID: 74685
          Assignee: cairo-bugs at cairographics.org
           Summary: Test for GL_EXT_bgra in addition to
                    GL_EXT_texture_format_BGRA8888
        QA Contact: cairo-bugs at cairographics.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: apuentes at igalia.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: gl backend
           Product: cairo

Created attachment 93623
  --> https://bugs.freedesktop.org/attachment.cgi?id=93623&action=edit
Test for GL_EXT_bgra in addition to GL_EXT_texture_format_BGRA8888

Some drivers don't expose the OpenGL ES extension
GL_EXT_texture_format_BGRA8888, but its OpenGL superset GL_EXT_bgra.
The cairo-gl context initialization will fail for OpenGL ES if that is the
case, as cairo checks only for the existance of the
GL_EXT_texture_format_BGRA8888. The initialization fails even when the
functionality is present on the device.

The same issue was reported/fixed in webkit/chromium:
https://bugs.webkit.org/show_bug.cgi?id=71502

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