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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/213774">213774</a></dd>
<dt>Author</dt> <dd>commit-queue@webkit.org</dd>
<dt>Date</dt> <dd>2017-03-12 16:52:30 -0700 (Sun, 12 Mar 2017)</dd>
</dl>
<h3>Log Message</h3>
<pre>REGRESSION (<a href="http://trac.webkit.org/projects/webkit/changeset/213764">r213764</a>): Async image decoding is disabled for animated images
https://bugs.webkit.org/show_bug.cgi?id=169529
Patch by Said Abou-Hallawa <sabouhallawa@apple.com> on 2017-03-12
Reviewed by Jon Lee.
The change <a href="http://trac.webkit.org/projects/webkit/changeset/213764">r213764</a> causes the animated images to be decoded synchronously
because we were calling frameImageAtIndex() with an empty sizeForDrawing
but with a valid subsamplingLevel. This call is translated to be synchronous
image decoding. The fix is get the current image frame without any decoding.
This is because are sure that in the case of animated image, the current
image frame can not be deleted.
* platform/graphics/BitmapImage.cpp:
(WebCore::BitmapImage::draw):</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCoreplatformgraphicsBitmapImagecpp">trunk/Source/WebCore/platform/graphics/BitmapImage.cpp</a></li>
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<h3>Diff</h3>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (213773 => 213774)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog        2017-03-12 22:56:55 UTC (rev 213773)
+++ trunk/Source/WebCore/ChangeLog        2017-03-12 23:52:30 UTC (rev 213774)
</span><span class="lines">@@ -1,3 +1,20 @@
</span><ins>+2017-03-12 Said Abou-Hallawa <sabouhallawa@apple.com>
+
+ REGRESSION (r213764): Async image decoding is disabled for animated images
+ https://bugs.webkit.org/show_bug.cgi?id=169529
+
+ Reviewed by Jon Lee.
+
+ The change r213764 causes the animated images to be decoded synchronously
+ because we were calling frameImageAtIndex() with an empty sizeForDrawing
+ but with a valid subsamplingLevel. This call is translated to be synchronous
+ image decoding. The fix is get the current image frame without any decoding.
+ This is because are sure that in the case of animated image, the current
+ image frame can not be deleted.
+
+ * platform/graphics/BitmapImage.cpp:
+ (WebCore::BitmapImage::draw):
+
</ins><span class="cx"> 2017-03-12 Romain Bellessort <romain.bellessort@crf.canon.fr>
</span><span class="cx">
</span><span class="cx"> [Readable Streams API] Implement ReadableStreamBYOBRequest respond() (closed stream state)
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformgraphicsBitmapImagecpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/platform/graphics/BitmapImage.cpp (213773 => 213774)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/graphics/BitmapImage.cpp        2017-03-12 22:56:55 UTC (rev 213773)
+++ trunk/Source/WebCore/platform/graphics/BitmapImage.cpp        2017-03-12 23:52:30 UTC (rev 213774)
</span><span class="lines">@@ -196,7 +196,10 @@
</span><span class="cx"> }
</span><span class="cx"> } else {
</span><span class="cx"> ASSERT(!frameIsBeingDecodedAtIndex(m_currentFrame, m_sizeForDrawing));
</span><del>- image = frameImageAtIndex(m_currentFrame, m_currentSubsamplingLevel, { }, &context);
</del><ins>+ if (shouldUseAsyncDecodingForAnimatedImage())
+ image = frameImageAtIndex(m_currentFrame);
+ else
+ image = frameImageAtIndex(m_currentFrame, m_currentSubsamplingLevel, { }, &context);
</ins><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> if (!image) // If it's too early we won't have an image yet.
</span></span></pre>
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