kc3-lang/angle

2021-09-07T17:41:11

Vulkan: Add ResourceWrite to track Read and Write Access vk::Resource currently only tracks accesses in general, not which type of access is being performed. This CL adds the new class ResourceWrite to track whether the access is a Read or Read/Write access and when the access completes. This allows a follow-on CL to know when a buffer is being written to by the GPU or if the GPU is only reading from a buffer. Tracking write accesses to buffers is required when attempting to "Ghost" (duplicate) GPU-read-only buffers to prevent breaking the render pass when the CPU maps the buffer memory. Bug: angleproject:5971 Test: ComputeShaderTest.ImageBufferMapWrite Change-Id: I965e3e75730719ccce77334744ae4feae33c6101 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3146319 Commit-Queue: Tim Van Patten <timvp@google.com> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Charlie Lao <cclao@google.com>