Add histograms for animated image types

third_party/WebKit/Source/platform/image-decoders/gif/GIFImageDecoder.cpp

 /*
  * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "platform/image-decoders/gif/GIFImageDecoder.h"
 
+#include <limits>
+#include "platform/graphics/BitmapImageMetrics.h"
 #include "platform/image-decoders/gif/GIFImageReader.h"
 #include "wtf/NotFound.h"
 #include "wtf/PtrUtil.h"
-#include <limits>
 
 namespace blink {
 
 GIFImageDecoder::GIFImageDecoder(AlphaOption alphaOption,
                                  const ColorBehavior& colorBehavior,
                                  size_t maxDecodedBytes)
     : ImageDecoder(alphaOption, colorBehavior, maxDecodedBytes),
       m_repetitionCount(cAnimationLoopOnce) {}
 
 GIFImageDecoder::~GIFImageDecoder() {}
@@ skipping 161 matching lines @@
   if (m_reader &&
       m_frameBufferCache[frameIndex].getStatus() == ImageFrame::FramePartial) {
     // Reset the state of the partial frame in the reader so that the frame
     // can be decoded again when requested.
     m_reader->clearDecodeState(frameIndex);
   }
   ImageDecoder::clearFrameBuffer(frameIndex);
 }
 
 size_t GIFImageDecoder::decodeFrameCount() {
+  const bool alreadyParsedFrameTwo = m_reader && m_reader->imagesCount() > 1;
   parse(GIFFrameCountQuery);
   // If decoding fails, |m_reader| will have been destroyed.  Instead of
   // returning 0 in this case, return the existing number of frames.  This way
   // if we get halfway through the image before decoding fails, we won't
   // suddenly start reporting that the image has zero frames.
-  return failed() ? m_frameBufferCache.size() : m_reader->imagesCount();
+  if (failed())
+    return m_frameBufferCache.size();
+
+  const size_t newCount = m_reader->imagesCount();
+  if (!alreadyParsedFrameTwo && newCount > 1)
+    BitmapImageMetrics::countAnimatedImageType(BitmapImageMetrics::AnimatedGIF);
+  return newCount;
 }
 
 void GIFImageDecoder::initializeNewFrame(size_t index) {
   ImageFrame* buffer = &m_frameBufferCache[index];
   const GIFFrameContext* frameContext = m_reader->frameContext(index);
   buffer->setOriginalFrameRect(
       intersection(frameContext->frameRect(), IntRect(IntPoint(), size())));
   buffer->setDuration(frameContext->delayTime());
   buffer->setDisposalMethod(frameContext->getDisposalMethod());
   buffer->setRequiredPreviousFrameIndex(
@@ skipping 44 matching lines @@
   m_currentBufferSawAlpha = false;
 }
 
 bool GIFImageDecoder::canReusePreviousFrameBuffer(size_t frameIndex) const {
   DCHECK(frameIndex < m_frameBufferCache.size());
   return m_frameBufferCache[frameIndex].getDisposalMethod() !=
          ImageFrame::DisposeOverwritePrevious;
 }
 
 }  // namespace blink