Commit 534bf87b8acec7399053bc6483dda0a81143af38
2016-02-09T11:33:29
Implemented instanced rendering for emulated point sprites Non-instanced PointSprite emulation for lower feature levels is implemented using D3D DrawIndexedInstanced and an instanced vertex buffer containing a pointsprite quad. GL instanced rendering using glDrawArraysInstanced and glDrawElementsInstanced with pointsprite emulation is performed using a for-loop. The loop iterates over each instance to render and adjusts the buffer offsets accordingly. This is not performant and is only used and required by this chosen pointsprite emulation method. Indexed instanced (glDrawElementsInstanced), uses the same offset loop because the vertex buffer containing the data to be rendered has already been expanded using getEmulatedIndexedBuffer(). Expanding the buffer makes the two rendering operations similar enough to share code. BUG=angleproject:1279 TEST=angle_end2end_tests Change-Id: If46cc9f158e29f5518c70ad630b3228f474a9f8b Reviewed-on: https://chromium-review.googlesource.com/321407 Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Geoff Lang <geofflang@chromium.org>