kc3-lang/angle/src/libANGLE/renderer/vulkan/shaders/gen

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  • Hash : 0892420b
    Author : Shahbaz Youssefi
    Date : 2023-06-28T23:03:51 

    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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