kc3-lang/angle

2019-01-16T13:27:15

Vulkan: Store reference to context command buffer. This frees us from checking the FB every draw. Slightly reduces time spent in all draw methods. Improvement seen on the draw call overhead tests. Scores went from 28.17 ns/draw to 26.76 ns/draw on my machine. In a future improvement we could make this command buffer a dirty bit. Currently it's a bit slower to call a handler function due to the dispatch table. Likely we could optimize this by reverting back to a dirty bit switch and inlining the handler functions. That is left for future work. Vulkan is happy enough to run multiple RenderPasses and bind different Pipelines in the same command buffer. But ANGLE defers RenderPass init until we submit our work. Thus we can only support one RenderPass per secondary buffer. Test: angle_perftests DrawCall*/vulkan_null Bug: angleproject:3014 Change-Id: I89fd0d9e0822400a5c5a16acb5a9c400a0e71ab5 Reviewed-on: https://chromium-review.googlesource.com/c/1393905 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>