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Coordinated Graphics: Remove an invisible TiledBackingStore of CoordinatedGraphicsLayer. https://bugs.webkit.org/show_bug.cgi?id=101424 Patch by Huang Dongsung <luxtella@company100.net> on 2012-11-08 Reviewed by Noam Rosenthal. Source/WebCore: This patch adds ASSERT to TextureMapperLayer while fixing this bug in WebKit2. * platform/graphics/texmap/TextureMapperLayer.cpp: (WebCore::TextureMapperLayer::paintSelf): Source/WebKit2: We must remove an invisible TiledBackingStore of CoordinatedGraphicsLayer. Currently, CoordinatedGraphicsLayer only removes a TiledBackingStore if !drawsContent() while TextureMapperLayer::updateBackingStore() removes a backing store if (!m_state.drawsContent || !m_state.contentsVisible || m_size.isEmpty()). CoordinatedGraphicsLayer must have the same behavior. In addition, this patch makes LayerTreeRenderer remove a backing store from GraphicsLayerTextureMapper when CoordinatedBackingStore does not have any tiles. Test: compositing/nested-direct-image-compositing.html * UIProcess/CoordinatedGraphics/CoordinatedBackingStore.cpp: (WebKit::CoordinatedBackingStore::removeTile): (WebKit::CoordinatedBackingStore::isEmpty): (WebKit): (WebKit::CoordinatedBackingStore::commitTileOperations): * UIProcess/CoordinatedGraphics/CoordinatedBackingStore.h: (CoordinatedBackingStore): * UIProcess/CoordinatedGraphics/LayerTreeRenderer.cpp: (WebKit::LayerTreeRenderer::removeBackingStoreIfNeeded): (WebKit): (WebKit::LayerTreeRenderer::removeTile): * UIProcess/CoordinatedGraphics/LayerTreeRenderer.h: (LayerTreeRenderer): * WebProcess/WebPage/CoordinatedGraphics/CoordinatedGraphicsLayer.cpp: (WebCore::CoordinatedGraphicsLayer::adjustContentsScale): LayoutTests: Coordinated Graphics had a bug when a compositing div has a compositing img with an absolute position property. This test is added to prevent from a regression. * compositing/nested-direct-image-compositing-expected.png: Added. * compositing/nested-direct-image-compositing-expected.txt: Added. * compositing/nested-direct-image-compositing.html: Added. Canonical link: https://commits.webkit.org/119744@main git-svn-id: https://svn.webkit.org/repository/webkit/trunk@133955 268f45cc-cd09-0410-ab3c-d52691b4dbfc
2012-11-08 22:37:57 +00:00
