tree eeccc882551fe219223dbd993d925a85c17c95c5
parent 21f4c2e758dbd23ee7d71e9c941a49b695abf284
author Stuart Scott <stuartscott@google.com> 1374254797 -0700
committer Stuart Scott <stuartscott@google.com> 1374629098 -0700

Moving offscreen rendering away from glReadPixels.

Instead offscreen rendering is done to an FBO which is then rendered as
a tile onto the screen, once the screen is full of tiles glSwapBuffers
is called. This allows allows a lot of rendering to occur before the
buffers are swapped and doesn't incur the overhead of a read back.

Change-Id: I420e6fb28bdd1d0f7c3dcd41063470f48e068e5b