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0892420b
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2023-06-28T23:03:51
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Vulkan: Optimize PBO download between RGBA and BGRA
Google Meet hits this path in Chrome when blurring the background. The
CPU readback was particularly slow on Intel/Mesa where readback from the
temp buffer took hundreds of milliseconds.
This change adds a compute shader that directly copies from the image to
the pack buffer in simple but common cases.
Bug: b/286882707
Change-Id: I9877ea01e3d8377db96f2539362aca67cf832b4a
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4657058
Auto-Submit: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Yuxin Hu <yuxinhu@google.com>
Reviewed-by: Charlie Lao <cclao@google.com>
Commit-Queue: Yuxin Hu <yuxinhu@google.com>
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