Commit 74b2886f587963b69348782bd81bee0d3409c0c0
2021-09-22T13:49:57
Vulkan: Try to use CPU to copy when preserving old buffer data When glBufferSubData is called, we may acquire a new buffer if buffer is still GPU busy. When this happened, we have to preserve buffer content if old buffer has valid data in it. Instead of always use GPU to do copy, this CL will check if GPU is not writing to the buffer, we will just use CPU to do the copy form old buffer to new buffer from the ranges outside subData, controlled by the feature flag preferCPUWhenPreservingBufferData. Bug: b/200067929 Change-Id: I42053104b2be8da5f399cca92e934254988f2fd8 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3177322 Reviewed-by: Tim Van Patten <timvp@google.com> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Charlie Lao <cclao@google.com>