Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 4a81b6beb546c57d3417fb0a23682c829780e6e5
https://github.com/WebKit/WebKit/commit/4a81b6beb546c57d3417fb0a23682c829780e6e5
Author: Simon Fraser <[email protected]>
Date: 2026-01-14 (Wed, 14 Jan 2026)
Changed paths:
M
LayoutTests/imported/w3c/web-platform-tests/css/css-view-transitions/massive-element-left-of-viewport-offscreen-old.html
M Source/WebCore/page/scrolling/ScrollingCoordinator.cpp
M Source/WebCore/rendering/RenderBox.h
M Source/WebCore/rendering/RenderBoxInlines.h
M Source/WebCore/rendering/RenderLayer.cpp
Log Message:
-----------
Maintain font subpixel quantization in more cases
https://bugs.webkit.org/show_bug.cgi?id=305416
rdar://168088611
Reviewed by Tim Horton.
Font subpixel quantization allows for better glyph caching, so it's preferable
to keep enabled
when possible. The code in `RenderLayer::setupFontSubpixelQuantization()` ended
up disabling
it in more cases than necessary. The intent was to disable it for painted
scrollers, but
this coded disabled it in more cases:
* A page may not have a scrollingCoordinator if it's the SVG "utility page"
*
LayoutTests/imported/w3c/web-platform-tests/css/css-view-transitions/massive-element-left-of-viewport-offscreen-old.html:
One pixel is different
* Source/WebCore/page/scrolling/ScrollingCoordinator.cpp:
(WebCore::ScrollingCoordinator::shouldUpdateScrollLayerPositionSynchronously
const):
* Source/WebCore/rendering/RenderBox.h:
* Source/WebCore/rendering/RenderBoxInlines.h:
(WebCore::RenderBox::hasScrollableOverflow const):
* Source/WebCore/rendering/RenderLayer.cpp:
(WebCore::RenderLayer::setupFontSubpixelQuantization):
Canonical link: https://commits.webkit.org/305575@main
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