Dynamic display of bounding rectangles (with coords computed by Vertex Shader and gotten with Transform Feedback) works now.
Major problem: the glMapBufferRange() slows doewn rendering in a major way. Multiblur's FPS:
Nexus5X : 35.4 before -> 12.6 afterNexus4 26.5 before -> ~12 after
Dynamic display of bounding rectangles (with coords computed by Vertex Shader and gotten with Transform Feedback) works now.
Major problem: the glMapBufferRange() slows doewn rendering in a major way. Multiblur's FPS:
Nexus5X : 35.4 before -> 12.6 after
Nexus4 26.5 before -> ~12 after