Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 275bfeb9ea5d7687865ca99bf107372d475ab6b8
      
https://github.com/WebKit/WebKit/commit/275bfeb9ea5d7687865ca99bf107372d475ab6b8
  Author: Fujii Hironori <[email protected]>
  Date:   2026-06-03 (Wed, 03 Jun 2026)

  Changed paths:
    M LayoutTests/platform/glib/TestExpectations
    A LayoutTests/platform/glib/damage/content/simple_image.png
    A LayoutTests/platform/glib/damage/image-layer-expected.txt
    A LayoutTests/platform/glib/damage/image-layer.html
    M Source/WebCore/platform/graphics/skia/SkiaCompositingLayer.cpp
    M 
Source/WebCore/platform/graphics/texmap/coordinated/CoordinatedPlatformLayer.cpp

  Log Message:
  -----------
  SkiaCompositingLayer: Content layers are always damaged
https://bugs.webkit.org/show_bug.cgi?id=315838

Reviewed by Carlos Garcia Campos.

In SkiaCompositingLayer::collectFrameDamage, layers with a content layer always
damaged the layer area. Thus, these layers were always repainted. It should be
repainted only if the content was modified.

In CoordinatedPlatformLayer::flushCompositingStateOnSkiaTarget, Change::Damage
should be flushed when Change::ContentsBuffer is flushed in order to sync them.

* LayoutTests/platform/glib/TestExpectations:
* LayoutTests/platform/glib/damage/content/simple_image.png: Added.
* LayoutTests/platform/glib/damage/image-layer-expected.txt: Added.
* LayoutTests/platform/glib/damage/image-layer.html: Added.
* Source/WebCore/platform/graphics/skia/SkiaCompositingLayer.cpp:
(WebCore::SkiaCompositingLayer::collectFrameDamage):
* 
Source/WebCore/platform/graphics/texmap/coordinated/CoordinatedPlatformLayer.cpp:
(WebCore::CoordinatedPlatformLayer::setContentsBuffer):
(WebCore::CoordinatedPlatformLayer::flushCompositingStateOnSkiaTarget):

Canonical link: https://commits.webkit.org/314450@main



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