kc3-lang/angle

2020-08-01T13:45:11

Vulkan: Squash Texture+ImageView Serial and improve caching. Previously we regenerated TextureSerial on Texture state changes such as base/max level changes. This caused ANGLE to update descriptor sets even though it was using the same image view handles. This change instead uses an ImageViewSubresourceSerial which includes both a serial for the ImageView and a 32-bit packed subresource range. The CL speeds up NBA2k because ANGLE no longer writes new descriptors for Texture max level changes. Local testing showed up to a 40% speedup. Also adds a regression test with a counter for the number of descriptor set writes in a frame. This change will also be useful in upcoming changes that track Image serials in the RenderPass. Bug: angleproject:4911 Change-Id: I66249634aa56288079acf2c0eb8aa3391103533c Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2333396 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Tim Van Patten <timvp@google.com>