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Marcus D. Hanwell authored
This adds a concept of a rendering backend to the module API, with an OpenGL and OpenGL2 backend. They are mutually exclusive and one or the other should be selected (or None in the case when rendering is not requested). This needs a little more work as the default backend enables rendering when the group is disabled at this point. Change-Id: I98d660e063ef58d52698e08ab06dd45601bea9cd
cf406e96