source: trunk/WebCore/ChangeLog @ 59396

Revision 59396, 1.9 MB checked in by, 4 years ago (diff)

2010-05-13 Simon Fraser <>

Reviewed by Dave Hyatt.

Fix scrolling in composited iframes

When propagating compositing out of iframes, we have to update the position of the iframe content
layers on scrolling.

Test: compositing/iframes/scrolling-iframe.html

  • page/FrameView.cpp: (WebCore::FrameView::scrollPositionChanged): Call updateContentLayerScrollPosition() when scrolling.
  • rendering/RenderLayerBacking.cpp: (WebCore::RenderLayerBacking::updateGraphicsLayerGeometry): Renamed setRootPlatformLayerClippingBox() to updateContentLayerOffset().
  • rendering/RenderLayerCompositor.h:
  • rendering/RenderLayerCompositor.cpp: Rename m_clippingLayer to m_clipLayer to go better with m_scrollLayer. (WebCore::RenderLayerCompositor::updateContentLayerOffset): Renamed from setRootPlatformLayerClippingBox().

Set the size of the clipping layer from the FrameView now, so that scrollbars are not clipped out.
Update the scroll layer position too.

(WebCore::RenderLayerCompositor::updateContentLayerScrollPosition): Set the position of the scroll layer

when the ScrollView is scrolled.

(WebCore::RenderLayerCompositor::rootPlatformLayer): m_clippingLayer rename.
(WebCore::RenderLayerCompositor::ensureRootPlatformLayer): m_clippingLayer rename. Also create m_scrollLayer at

the same time as the clip layer, and clean it up as necessary.

(WebCore::RenderLayerCompositor::destroyRootPlatformLayer): m_clippingLayer rename, and clean up the m_scrollLayer too.
(WebCore::RenderLayerCompositor::detachRootPlatformLayer): m_clippingLayer rename

  • Property svn:eol-style set to native

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