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haikuwebkit/ManualTests/frames/resources/blit-on-scroll-subsubframe....

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2010-11-02 Simon Fraser <simon.fraser@apple.com> Reviewed by Dan Bernstein. Overlapped nested iframes show smearing when scrolled https://bugs.webkit.org/show_bug.cgi?id=48873 A FrameView goes into slow scrolling mode (not blitting) when told that it is overlapped. However, a nested iframe could still try to use fast scrolling when its parent is overlapped, which could result in bad rendering. Fixed by making useSlowRepaints() and useSlowRepaintsIfNotOverlapped() walk up their parent chain, asking if their parents also use slow repaints. All the places that call setCanBlitOnScroll() now call updateCanBlitOnScrollRecursively() to ensure that the canBlitOnScroll flag is updated correctly on subframes. Repaint tests do not work on nested iframes, so added manual test. * manual-tests/frames/nested-iframe-blit-on-scroll.html: Added. * manual-tests/frames/resources/blit-on-scroll-subframe.html: Added. * manual-tests/frames/resources/blit-on-scroll-subsubframe.html: Added. * page/FrameView.cpp: (WebCore::FrameView::layout): (WebCore::FrameView::useSlowRepaints): (WebCore::FrameView::useSlowRepaintsIfNotOverlapped): (WebCore::FrameView::updateCanBlitOnScrollRecursively): (WebCore::FrameView::setUseSlowRepaints): (WebCore::FrameView::addSlowRepaintObject): (WebCore::FrameView::removeSlowRepaintObject): (WebCore::FrameView::addFixedObject): (WebCore::FrameView::removeFixedObject): (WebCore::FrameView::setIsOverlapped): (WebCore::FrameView::setContentIsOpaque): * page/FrameView.h: Canonical link: https://commits.webkit.org/61688@main git-svn-id: https://svn.webkit.org/repository/webkit/trunk@71194 268f45cc-cd09-0410-ab3c-d52691b4dbfc
2010-11-03 00:59:00 +00:00
<style type="text/css" media="screen">
iframe {
padding: 10px;
}
body {
background-color: gray;
height: 1000px;
}
</style>