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<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/277596">277596</a></dd>
<dt>Author</dt> <dd>alancoon@apple.com</dd>
<dt>Date</dt> <dd>2021-05-17 11:54:21 -0700 (Mon, 17 May 2021)</dd>
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<h3>Log Message</h3>
<pre>Cherry-pick <a href="http://trac.webkit.org/projects/webkit/changeset/277528">r277528</a>. rdar://problem/78109685

    REGRESSION (<a href="http://trac.webkit.org/projects/webkit/changeset/269824">r269824</a>): Random tile corruption when scrolling/zooming in macCatalyst
    https://bugs.webkit.org/show_bug.cgi?id=225837
    <rdar://problem/75053997>

    Reviewed by Simon Fraser.

    * Shared/RemoteLayerTree/RemoteLayerBackingStore.mm:
    (WebKit::RemoteLayerBackingStore::swapToValidFrontBuffer):
    Mark the newly front buffer non-volatile before painting into it.
    This was lost in <a href="http://trac.webkit.org/projects/webkit/changeset/269824">r269824</a>. Oddly, this caused less trouble than
    one might expect, except on some particular hardware.

    git-svn-id: https://svn.webkit.org/repository/webkit/trunk@277528 268f45cc-cd09-0410-ab3c-d52691b4dbfc</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#branchessafari6121151branchSourceWebKitChangeLog">branches/safari-612.1.15.1-branch/Source/WebKit/ChangeLog</a></li>
<li><a href="#branchessafari6121151branchSourceWebKitSharedRemoteLayerTreeRemoteLayerBackingStoremm">branches/safari-612.1.15.1-branch/Source/WebKit/Shared/RemoteLayerTree/RemoteLayerBackingStore.mm</a></li>
</ul>

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<div id="patch">
<h3>Diff</h3>
<a id="branchessafari6121151branchSourceWebKitChangeLog"></a>
<div class="modfile"><h4>Modified: branches/safari-612.1.15.1-branch/Source/WebKit/ChangeLog (277595 => 277596)</h4>
<pre class="diff"><span>
<span class="info">--- branches/safari-612.1.15.1-branch/Source/WebKit/ChangeLog        2021-05-17 18:54:17 UTC (rev 277595)
+++ branches/safari-612.1.15.1-branch/Source/WebKit/ChangeLog   2021-05-17 18:54:21 UTC (rev 277596)
</span><span class="lines">@@ -1,5 +1,38 @@
</span><span class="cx"> 2021-05-17  Russell Epstein  <repstein@apple.com>
</span><span class="cx"> 
</span><ins>+        Cherry-pick r277528. rdar://problem/78109685
+
+    REGRESSION (r269824): Random tile corruption when scrolling/zooming in macCatalyst
+    https://bugs.webkit.org/show_bug.cgi?id=225837
+    <rdar://problem/75053997>
+    
+    Reviewed by Simon Fraser.
+    
+    * Shared/RemoteLayerTree/RemoteLayerBackingStore.mm:
+    (WebKit::RemoteLayerBackingStore::swapToValidFrontBuffer):
+    Mark the newly front buffer non-volatile before painting into it.
+    This was lost in r269824. Oddly, this caused less trouble than
+    one might expect, except on some particular hardware.
+    
+    
+    git-svn-id: https://svn.webkit.org/repository/webkit/trunk@277528 268f45cc-cd09-0410-ab3c-d52691b4dbfc
+
+    2021-05-14  Tim Horton  <timothy_horton@apple.com>
+
+            REGRESSION (r269824): Random tile corruption when scrolling/zooming in macCatalyst
+            https://bugs.webkit.org/show_bug.cgi?id=225837
+            <rdar://problem/75053997>
+
+            Reviewed by Simon Fraser.
+
+            * Shared/RemoteLayerTree/RemoteLayerBackingStore.mm:
+            (WebKit::RemoteLayerBackingStore::swapToValidFrontBuffer):
+            Mark the newly front buffer non-volatile before painting into it.
+            This was lost in r269824. Oddly, this caused less trouble than
+            one might expect, except on some particular hardware.
+
+2021-05-17  Russell Epstein  <repstein@apple.com>
+
</ins><span class="cx">         Cherry-pick r277453. rdar://problem/78108967
</span><span class="cx"> 
</span><span class="cx">     Add textIndicator bounce for AppHighlights on scroll.
</span></span></pre></div>
<a id="branchessafari6121151branchSourceWebKitSharedRemoteLayerTreeRemoteLayerBackingStoremm"></a>
<div class="modfile"><h4>Modified: branches/safari-612.1.15.1-branch/Source/WebKit/Shared/RemoteLayerTree/RemoteLayerBackingStore.mm (277595 => 277596)</h4>
<pre class="diff"><span>
<span class="info">--- branches/safari-612.1.15.1-branch/Source/WebKit/Shared/RemoteLayerTree/RemoteLayerBackingStore.mm        2021-05-17 18:54:17 UTC (rev 277595)
+++ branches/safari-612.1.15.1-branch/Source/WebKit/Shared/RemoteLayerTree/RemoteLayerBackingStore.mm   2021-05-17 18:54:21 UTC (rev 277596)
</span><span class="lines">@@ -202,8 +202,10 @@
</span><span class="cx"> 
</span><span class="cx">     std::swap(m_frontBuffer, m_backBuffer);
</span><span class="cx"> 
</span><del>-    if (m_frontBuffer.imageBuffer)
</del><ins>+    if (m_frontBuffer.imageBuffer) {
+        setBufferVolatility(BufferType::Front, false);
</ins><span class="cx">         return;
</span><ins>+    }
</ins><span class="cx"> 
</span><span class="cx">     bool shouldUseRemoteRendering = WebProcess::singleton().shouldUseRemoteRenderingFor(WebCore::RenderingPurpose::DOM);
</span><span class="cx"> 
</span></span></pre>
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