tree ace18d5dad8f46a894978580ee80ea62b3939ef6
parent 5110da4924e937d6db346da0d145bac72181a068
author River Gilhuly <rivr@chromium.org> 1663100760 +0000
committer Chromium LUCI CQ <chromium-scoped@luci-project-accounts.iam.gserviceaccount.com> 1663100760 +0000

[lacros] Add clip rect support for delegated compositing over Wayland

Forward clip_rect data from lacros viz to ash chrome. Due to hardware
limitations, UVs need to line up on pixel boundaries for textures to
be promoted to overlays. Geometric clipping doesn't always satisfy
this, so this clip needs to be preserved for delegated quads that we
want to end up as hardware overlays.

This feature is disabled by default, and is enabled by the visual
debugger flag "candidate.enable.clip_rect".

Overlay clip rect design note:
https://docs.google.com/document/d/10udDdyzVVnpixgQU-K3u51z9SESOpGvcpfFQIJLzC4A

Subsurface transformation design doc:
https://docs.google.com/document/d/1rfwkx0u281iMCS45KAl3j9BcdUc3HshBpbb8aDS0my8

Bug: 1348751
Change-Id: I0bc63d32834b076abbe6493ad962906cd0c5b034
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3860121
Commit-Queue: River Gilhuly <rivr@chromium.org>
Reviewed-by: Peter McNeeley <petermcneeley@chromium.org>
Reviewed-by: Ken Buchanan <kenrb@chromium.org>
Reviewed-by: Kramer Ge <fangzhoug@chromium.org>
Reviewed-by: Robert Kroeger <rjkroege@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1046539}