Incremental renderer updates for multiple viewports#5225

Merged

lilleyse merged 5 commits intomasterfrom viewports-incremental

Apr 27, 2017

+125-71

Commits on Apr 20, 2017

Use current viewport to compute new viewports for 2D instead of the canvas dimensions.
bagnell
committed
Use the scissor test to only copy the parts of the texture written to.
bagnell
committed

Commits on Apr 21, 2017

Update from review.
bagnell
committed

Commits on Apr 26, 2017