<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<!DOCTYPE bugzilla SYSTEM "https://bugs.webkit.org/page.cgi?id=bugzilla.dtd">

<bugzilla version="5.0.4.1"
          urlbase="https://bugs.webkit.org/"
          
          maintainer="admin@webkit.org"
>

    <bug>
          <bug_id>180178</bug_id>
          
          <creation_ts>2017-11-29 17:34:13 -0800</creation_ts>
          <short_desc>Missing layer content when animating elements on-screen</short_desc>
          <delta_ts>2017-11-30 11:00:29 -0800</delta_ts>
          <reporter_accessible>1</reporter_accessible>
          <cclist_accessible>1</cclist_accessible>
          <classification_id>1</classification_id>
          <classification>Unclassified</classification>
          <product>WebKit</product>
          <component>New Bugs</component>
          <version>WebKit Nightly Build</version>
          <rep_platform>Unspecified</rep_platform>
          <op_sys>Unspecified</op_sys>
          <bug_status>RESOLVED</bug_status>
          <resolution>FIXED</resolution>
          
          
          <bug_file_loc></bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords>InRadar</keywords>
          <priority>P2</priority>
          <bug_severity>Normal</bug_severity>
          <target_milestone>---</target_milestone>
          
          
          <everconfirmed>1</everconfirmed>
          <reporter name="Simon Fraser (smfr)">simon.fraser</reporter>
          <assigned_to name="Simon Fraser (smfr)">simon.fraser</assigned_to>
          <cc>dino</cc>
    
    <cc>sabouhallawa</cc>
    
    <cc>simon.fraser</cc>
    
    <cc>webkit-bug-importer</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>1376148</commentid>
    <comment_count>0</comment_count>
    <who name="Simon Fraser (smfr)">simon.fraser</who>
    <bug_when>2017-11-29 17:34:13 -0800</bug_when>
    <thetext>Missing layer content when animating elements on-screen</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1376152</commentid>
    <comment_count>1</comment_count>
      <attachid>327935</attachid>
    <who name="Simon Fraser (smfr)">simon.fraser</who>
    <bug_when>2017-11-29 17:37:17 -0800</bug_when>
    <thetext>Created attachment 327935
Patch</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1376154</commentid>
    <comment_count>2</comment_count>
      <attachid>327936</attachid>
    <who name="Simon Fraser (smfr)">simon.fraser</who>
    <bug_when>2017-11-29 17:37:34 -0800</bug_when>
    <thetext>Created attachment 327936
Manual test</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1376155</commentid>
    <comment_count>3</comment_count>
    <who name="Simon Fraser (smfr)">simon.fraser</who>
    <bug_when>2017-11-29 17:37:49 -0800</bug_when>
    <thetext>rdar://problem/34923438</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1376159</commentid>
    <comment_count>4</comment_count>
      <attachid>327935</attachid>
    <who name="Dean Jackson">dino</who>
    <bug_when>2017-11-29 17:41:14 -0800</bug_when>
    <thetext>Comment on attachment 327935
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=327935&amp;action=review

&gt; Source/WebCore/platform/graphics/ca/GraphicsLayerCA.cpp:1516
&gt; +    bool nowRunningTransformAnimation = wasRunningTransformAnimation;
&gt; +    if (m_uncommittedChanges &amp; AnimationChanged)
&gt; +        nowRunningTransformAnimation = isRunningTransformAnimation();
&gt; +
&gt; +    if (wasRunningTransformAnimation != nowRunningTransformAnimation)
&gt; +        childCommitState.ancestorStartedOrEndedTransformAnimation = true;

I wish all this could be one statement, but I can&apos;t think of a better way.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1376165</commentid>
    <comment_count>5</comment_count>
    <who name="Simon Fraser (smfr)">simon.fraser</who>
    <bug_when>2017-11-29 17:50:58 -0800</bug_when>
    <thetext>https://trac.webkit.org/r225310</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1376403</commentid>
    <comment_count>6</comment_count>
      <attachid>327935</attachid>
    <who name="Said Abou-Hallawa">sabouhallawa</who>
    <bug_when>2017-11-30 11:00:29 -0800</bug_when>
    <thetext>Comment on attachment 327935
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=327935&amp;action=review

&gt;&gt; Source/WebCore/platform/graphics/ca/GraphicsLayerCA.cpp:1516
&gt;&gt; +        childCommitState.ancestorStartedOrEndedTransformAnimation = true;
&gt; 
&gt; I wish all this could be one statement, but I can&apos;t think of a better way.

Maybe

if ((m_uncommittedChanges &amp; AnimationChanged) &amp;&amp; wasRunningTransformAnimation != isRunningTransformAnimation())</thetext>
  </long_desc>
      
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            <date>2017-11-29 17:37:17 -0800</date>
            <delta_ts>2017-11-29 17:41:14 -0800</delta_ts>
            <desc>Patch</desc>
            <filename>bug-180178-20171129173716.patch</filename>
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            <attachid>327936</attachid>
            <date>2017-11-29 17:37:34 -0800</date>
            <delta_ts>2017-11-29 17:37:34 -0800</delta_ts>
            <desc>Manual test</desc>
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            <attacher name="Simon Fraser (smfr)">simon.fraser</attacher>
            
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