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Marcus D. Hanwell authored
This change makes more modules dynamically switch between the rendering backends if they have no OpenGL code, or introduces some ifdefs in the case of RenderingParallel (which may not be functional at this stage). Added RenderingFreeTypeOpenGL2 which will also need some additional work before it is properly integrated with the new rendering backend, but it surprisingly seems to render on the desktop. This commit contains everything needed to get a minimal ParaView build using the new rendering backend for polygonal rendering. Change-Id: If8676d41d263b046a54060965fc760b5d4bd64a1
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