• Matthew Waters's avatar
    glcontext: add support for influencing the backing configuration · 7066c849
    Matthew Waters authored
    New API:
    - gst_gl_context_get_config()
    - gst_gl_context_request_config()
    
    A GL context configuration is a GstStructure that has some well-known
    names for common values that can also be extended in platform-specific
    ways if necessary.
    
    Wrapped OpenGL contexts may be able to retrieve the GL context
    configuration depending on the platform.  If that information is
    available, GstGLContext will attempt to create an context that matches
    the shared OpenGL context config unless gst_gl_context_request_config()
    has been called.
    
    A new environment variable 'GST_GL_CONFIG' will be read to influence the
    configuration chosen.  The environment variable will only be used as a
    fallback if gst_gl_context_request_config() has not been called.
    
    Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/809>
    7066c849
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