Branch: refs/heads/main Home: https://github.com/WebKit/WebKit Commit: 854716970c0750581f75ee43bb91578d9ac52451 https://github.com/WebKit/WebKit/commit/854716970c0750581f75ee43bb91578d9ac52451 Author: Simon Fraser <simon.fra...@apple.com> Date: 2022-11-13 (Sun, 13 Nov 2022)
Changed paths: A LayoutTests/compositing/clipping/sticky-inside-overflow-x-clip-expected.txt A LayoutTests/compositing/clipping/sticky-inside-overflow-x-clip.html A LayoutTests/platform/gtk/compositing/clipping/sticky-inside-overflow-x-clip-expected.txt A LayoutTests/platform/ios-wk2/compositing/clipping/sticky-inside-overflow-x-clip-expected.txt A LayoutTests/platform/mac-wk1/compositing/clipping/sticky-inside-overflow-x-clip-expected.txt M Source/WebCore/platform/graphics/LayoutRect.h M Source/WebCore/rendering/RenderLayerCompositor.cpp Log Message: ----------- Elements with `position: sticky` jitter inside a container with `overflow-x: clip;` https://bugs.webkit.org/show_bug.cgi?id=247130 rdar://101645570 Reviewed by Alan Baradlay. `overflow:clip` on just one axis can output a clip rect which is infinite in just x or y. In that case, we'd create a clipping layer with large floating point geometry values which, when moved around by the scrolling tree, had low precision resulting in visible stutters. Fix by shrinking the infinite rect values by a factor of 16, which is sufficient to provide enough device pixel precision for 3x displays. * LayoutTests/compositing/clipping/sticky-inside-overflow-x-clip-expected.txt: Added. * LayoutTests/compositing/clipping/sticky-inside-overflow-x-clip.html: Added. * LayoutTests/platform/gtk/compositing/clipping/sticky-inside-overflow-x-clip-expected.txt: Added. * LayoutTests/platform/ios-wk2/compositing/clipping/sticky-inside-overflow-x-clip-expected.txt: Added. * LayoutTests/platform/mac-wk1/compositing/clipping/sticky-inside-overflow-x-clip-expected.txt: Added. * Source/WebCore/platform/graphics/LayoutRect.h: * Source/WebCore/rendering/RenderLayerCompositor.cpp: (WebCore::RenderLayerCompositor::computeAncestorClippingStack const): Canonical link: https://commits.webkit.org/256618@main _______________________________________________ webkit-changes mailing list webkit-changes@lists.webkit.org https://lists.webkit.org/mailman/listinfo/webkit-changes