commit d96b94eb328baa1a3b29c35aebf78d1692b448ab
author cwzwarich@webkit.org <cwzwarich@webkit.org@268f45cc-cd09-0410-ab3c-d52691b4dbfc> Thu Dec 11 21:56:07 2008 +0000
committer cwzwarich@webkit.org <cwzwarich@webkit.org@268f45cc-cd09-0410-ab3c-d52691b4dbfc> Thu Dec 11 21:56:07 2008 +0000
tree a887fefd5fa753c3e23dc6e944a454ee40dcdc44
parent 9733b047af38eb4a1bc07a7274f46a7b1d3e49d8

2008-12-11  Cameron Zwarich  <zwarich@apple.com>

        Reviewed by Dave Hyatt.

        Bug 21256: REGRESSION (r36906): horizontally repeating image leaves ghosts when vertical scrolling
        <https://bugs.webkit.org/show_bug.cgi?id=21256>
        <rdar://problem/6362978>

        The ScrollView refactoring in r36906 caused the ScrollView and the
        platform widget to disagree about whether optimizing scrolling via
        blitting is allowed. The easiest way to fix this is to make ScrollView
        simply ask the platform widget whether this is safe on platforms that
        are affected.

        It is not possible to write a layout test for this bug because it
        involves the back/forward cache.

        * platform/ScrollView.cpp:
        (WebCore::ScrollView::ScrollView):
        (WebCore::ScrollView::setCanBlitOnScroll):
        (WebCore::ScrollView::canBlitOnScroll):
        (WebCore::ScrollView::platformSetCanBlitOnScroll):
        (WebCore::ScrollView::platformCanBlitOnScroll):
        * platform/ScrollView.h:
        * platform/mac/ScrollViewMac.mm:
        (WebCore::ScrollView::platformSetCanBlitOnScroll):
        (WebCore::ScrollView::platformCanBlitOnScroll):
        * platform/wx/ScrollViewWx.cpp:
        (WebCore::ScrollView::platformSetCanBlitOnScroll):
        (WebCore::ScrollView::platformCanBlitOnScroll):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@39217 268f45cc-cd09-0410-ab3c-d52691b4dbfc

WebCore/ChangeLog

diff --git a/WebCore/ChangeLog b/WebCore/ChangeLog
index e77ea7d..62bfd82 100644
--- a/WebCore/ChangeLog
+++ b/WebCore/ChangeLog
@@ -1,3 +1,34 @@
+2008-12-11  Cameron Zwarich  <zwarich@apple.com>
+
+        Reviewed by Dave Hyatt.
+
+        Bug 21256: REGRESSION (r36906): horizontally repeating image leaves ghosts when vertical scrolling
+        <https://bugs.webkit.org/show_bug.cgi?id=21256>
+        <rdar://problem/6362978>
+
+        The ScrollView refactoring in r36906 caused the ScrollView and the
+        platform widget to disagree about whether optimizing scrolling via
+        blitting is allowed. The easiest way to fix this is to make ScrollView
+        simply ask the platform widget whether this is safe on platforms that
+        are affected.
+
+        It is not possible to write a layout test for this bug because it
+        involves the back/forward cache.
+
+        * platform/ScrollView.cpp:
+        (WebCore::ScrollView::ScrollView):
+        (WebCore::ScrollView::setCanBlitOnScroll):
+        (WebCore::ScrollView::canBlitOnScroll):
+        (WebCore::ScrollView::platformSetCanBlitOnScroll):
+        (WebCore::ScrollView::platformCanBlitOnScroll):
+        * platform/ScrollView.h:
+        * platform/mac/ScrollViewMac.mm:
+        (WebCore::ScrollView::platformSetCanBlitOnScroll):
+        (WebCore::ScrollView::platformCanBlitOnScroll):
+        * platform/wx/ScrollViewWx.cpp:
+        (WebCore::ScrollView::platformSetCanBlitOnScroll):
+        (WebCore::ScrollView::platformCanBlitOnScroll):
+
 2008-12-11  Brent Fulgham  <bfulgham@gmail.com>
 
         Reviewed by Adam Roben.