tree 66dbe93196ca52c83cefc93b4bf8c2b9524eb1b1
parent 06c73b3d23c3737634c043d1bbf41b726d6781d2
author Tim Van Patten <timvp@google.com> 1631058071 -0600
committer Angle LUCI CQ <angle-scoped@luci-project-accounts.iam.gserviceaccount.com> 1632272011 +0000

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>