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2010-04-28 Noam Rosenthal <noam.rosenthal@nokia.com>
Reviewed by Kenneth Rohde Christiansen. [Qt] GraphicsLayer: preserves-3d and backface visibility https://bugs.webkit.org/show_bug.cgi?id=35312 Implement preserves-3d by maintaining the 3D transformation heirarchy inside GraphicsLayerQt, and extrapolating the relative QTransform. When the extrapolation fails (un-invertible matrix) we ignore the transformation change. WebKitSite/blog-files/3d-transforms test now work with Qt. * platform/graphics/qt/GraphicsLayerQt.cpp: (WebCore::GraphicsLayerQtImpl::updateTransform): (WebCore::GraphicsLayerQtImpl::opaqueArea): (WebCore::GraphicsLayerQtImpl::boundingRect): (WebCore::GraphicsLayerQtImpl::paint): (WebCore::GraphicsLayerQtImpl::flushChanges): Canonical link: https://commits.webkit.org/49678@main git-svn-id: https://svn.webkit.org/repository/webkit/trunk@58408 268f45cc-cd09-0410-ab3c-d52691b4dbfc
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