10daade1c0
At this point only the gl driver is at all aware of the difference between core and compat contexts. COGL_PRIVATE_FEATURE_GL_FIXED is also now quite misnamed, since we're using the GLSL pipeline even for pre-GL3 contexts. Remove the private feature and handle the few remaining differences by checking the driver class inside the gl driver. https://gitlab.gnome.org/GNOME/mutter/merge_requests/973