Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: b49e28e712978d619ddb49b28fecf354a1700b77
https://github.com/WebKit/WebKit/commit/b49e28e712978d619ddb49b28fecf354a1700b77
Author: Taher Ali <[email protected]>
Date: 2026-10-01 (Thu, 01 Oct 2026)
Changed paths:
A
LayoutTests/compositing/canvas/html-in-canvas-drawable-canvas-is-composited-expected.txt
A
LayoutTests/compositing/canvas/html-in-canvas-drawable-canvas-is-composited.html
M Source/WebCore/rendering/RenderHTMLCanvas.cpp
M Source/WebCore/rendering/RenderHTMLCanvas.h
M Source/WebCore/rendering/RenderLayerBacking.cpp
M Source/WebCore/rendering/RenderLayerCompositor.cpp
Log Message:
-----------
[HTML-in-Canvas] Always give a canvas with drawable content its own
composited layer
https://bugs.webkit.org/show_bug.cgi?id=325958
rdar://188916571
Reviewed by Simon Fraser.
A canvas with content="drawable" may be redrawn from its paint event handler.
In this PR, we give such a canvas its own composited layer, so its
drawable content is repainted into the canvas's own backing store
than into the tiles.
This uses CanvasPaintedToLayer for now. Follow-up PRs will move this
canvas to CanvasAsLayerContents to adopt the double-buffered model.
Test: compositing/canvas/html-in-canvas-drawable-canvas-is-composited.html
*
LayoutTests/compositing/canvas/html-in-canvas-drawable-canvas-is-composited-expected.txt:
Added.
*
LayoutTests/compositing/canvas/html-in-canvas-drawable-canvas-is-composited.html:
Added.
* Source/WebCore/rendering/RenderHTMLCanvas.cpp:
(WebCore::RenderHTMLCanvas::hasDrawableContent const):
* Source/WebCore/rendering/RenderHTMLCanvas.h:
* Source/WebCore/rendering/RenderLayerBacking.cpp:
(WebCore::canvasCompositingStrategy):
* Source/WebCore/rendering/RenderLayerCompositor.cpp:
(WebCore::RenderLayerCompositor::requiresCompositingForCanvas const):
Canonical link: https://commits.webkit.org/322460@main
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