tor-browser

commit bceee66d097b580bf91fa58c1c4571b08fb041f8
parent ea5cdb606718658bbea1d5c4fca0dcc9e3e06430
Author: Sotaro Ikeda <sotaro.ikeda.g@gmail.com>
Date:   Wed, 10 Dec 2025 03:47:46 +0000

Bug 2005100 - Perfer overlay than underlay r=gfx-reviewers,lsalzman

Power usage of overlay could be more efficient than underlay.

When overlay could not be used, underlay is selected.

Differential Revision: https://phabricator.services.mozilla.com/D275717

Diffstat:
M
gfx/wr/webrender/src/picture.rs
 | 
9
++-------

1 file changed, 2 insertions(+), 7 deletions(-)
diff --git a/gfx/wr/webrender/src/picture.rs b/gfx/wr/webrender/src/picture.rs
@@ -3428,13 +3428,8 @@ impl TileCacheInstance {
                     // is necessary for correct color display.
                     let force = prim_data.kind.color_depth.bit_depth() > 8;
 
-                    let clip_on_top = prim_clip_chain.needs_mask;
-                    let prefer_underlay = clip_on_top || !cfg!(target_os = "macos");
-                    let promotion_attempts = if prefer_underlay {
-                        [CompositorSurfaceKind::Underlay, CompositorSurfaceKind::Overlay]
-                    } else {
-                        [CompositorSurfaceKind::Overlay, CompositorSurfaceKind::Underlay]
-                    };
+                    let promotion_attempts =
+                        [CompositorSurfaceKind::Overlay, CompositorSurfaceKind::Underlay];
 
                     for kind in promotion_attempts {
                         // Since this might be an attempt after an earlier error, clear the flag