Title: [133470] branches/safari-536.28-branch/Source/WebCore
- Revision
- 133470
- Author
- lforsch...@apple.com
- Date
- 2012-11-05 07:06:17 -0800 (Mon, 05 Nov 2012)
Log Message
Merged r124919. <rdar://problem/12516354>
Modified Paths
Diff
Modified: branches/safari-536.28-branch/Source/WebCore/ChangeLog (133469 => 133470)
--- branches/safari-536.28-branch/Source/WebCore/ChangeLog 2012-11-05 15:02:29 UTC (rev 133469)
+++ branches/safari-536.28-branch/Source/WebCore/ChangeLog 2012-11-05 15:06:17 UTC (rev 133470)
@@ -1,5 +1,24 @@
2012-11-05 Lucas Forschler <lforsch...@apple.com>
+ Merge r124919
+
+ 2012-08-07 Adrienne Walker <e...@google.com>
+
+ 50% fixed position coverage slow scroll heuristic is incorrect when invalidations aren't clipped
+ https://bugs.webkit.org/show_bug.cgi?id=92011
+
+ Reviewed by Simon Fraser.
+
+ The heuristic in scrollContentsFastPath to slow scroll by invalidating
+ the entire frame if fixed position elements cover 50% of the frame
+ takes away the ability of ports to make their own decisions about how
+ to best handle invalidations. Therefore, remove this heuristic.
+
+ * page/FrameView.cpp:
+ (WebCore::FrameView::scrollContentsFastPath):
+
+2012-11-05 Lucas Forschler <lforsch...@apple.com>
+
Merge r124914
2012-08-07 Abhishek Arya <infe...@chromium.org>
@@ -206358,3 +206377,4 @@
.
.
.
+.
Modified: branches/safari-536.28-branch/Source/WebCore/page/FrameView.cpp (133469 => 133470)
--- branches/safari-536.28-branch/Source/WebCore/page/FrameView.cpp 2012-11-05 15:02:29 UTC (rev 133469)
+++ branches/safari-536.28-branch/Source/WebCore/page/FrameView.cpp 2012-11-05 15:06:17 UTC (rev 133470)
@@ -1494,10 +1494,6 @@
regionToUpdate.unite(updateRect);
}
- // The area to be painted by fixed objects exceeds 50% of the area of the view, we cannot use the fast path.
- if (regionToUpdate.totalArea() > (clipRect.width() * clipRect.height() * 0.5))
- return false;
-
// 1) scroll
hostWindow()->scroll(scrollDelta, rectToScroll, clipRect);
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