[PATCH 0/1] MR379: wined3d: Don't transition GENERAL layouts for blits.

Tue Jul 5 04:58:24 CDT 2022

On Radeon GPUs VK_IMAGE_LAYOUT_GENERAL images don't use Delta Color
Compression, but SRC/DST optimal images do. Transitioning from GENERAL
to SRC/DST causes a big performance hit.

As a next step we should try harder to avoid VK_IMAGE_LAYOUT_GENERAL.

Signed-off-by: Stefan DÃ¶singer <stefan at codeweavers.com>

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This is an updated version of Merge Request #4, with fixes for the
regression in World of Tanks I noticed.

This improves Rocket League from 50fps to 67fps when it is GPU limited.
Using VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL instead of GENERAL
further improves it to 80 fps. Switching from COLOR_ATTACHMENT_OPTIMAL
to SRC/DST optimal seems cheap (it just stays compressed), but first we
need logic to transition BIND_RENDER_TARGET | BIND_SHADER_RESOURCE
textures between COLOR_ATTACHMENT_OPTIMAL and SHADER_READ_ONLY_OPTIMAL.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/379