Commit b82d86333662bdcce273307fdfbd1cd4d4b6f89a
2019-07-15T11:23:08
Vulkan: Atomic counter buffer support Vulkan doesn't treat atomic counters especially, and they are emulated with atomic access to storage buffers. A single atomic counter buffer binding per pipeline is supported. All the atomic counters identify an offset within this buffer. The shader is modified to include a storage buffer definition with `uint counters[];` as the only field. A compiler pass replaces atomic counter definitions with variables that hold the corresponding offset parameter, as well as changing atomic_uint types to just uint (as the offset). Where an atomic counter variable is used, it is replaced with the offset variable (plus the array index, if array). At the same time, built-in `atomicCounter*` functions are replaced with a corresponding `atomic*` function and `memoryBarrierAtomicCounter` is replaced with `memoryBarrierBuffer`. Bug: angleproject:3566 Change-Id: Iefb3d47de6a5cb3072bfa0cb94a46ac6a886d369 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1704635 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Tim Van Patten <timvp@google.com>