Track positions of dimensions in image files

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/image-decoders/gif/GIFImageReader.h"
+#include "public/platform/Platform.h"
 #include "wtf/NotFound.h"
 #include "wtf/PassOwnPtr.h"
 
 namespace blink {
 
 GIFImageDecoder::GIFImageDecoder(AlphaOption alphaOption, GammaAndColorProfileOption colorOptions, size_t maxDecodedBytes)
     : ImageDecoder(alphaOption, colorOptions, maxDecodedBytes)
-    , m_repetitionCount(cAnimationLoopOnce)
+    , m_repetitionCount(cAnimationLoopOnce), m_sizeOffset(0), m_sizeOffsetOptimized(0)
 {
 }
 
 GIFImageDecoder::~GIFImageDecoder()
 {
 }
 
 void GIFImageDecoder::onSetData(SharedBuffer* data)
 {
     if (m_reader)
@@ skipping 123 matching lines @@
 
     buffer.setPixelsChanged(true);
     return true;
 }
 
 bool GIFImageDecoder::parseCompleted() const
 {
     return m_reader && m_reader->parseCompleted();
 }
 
+void GIFImageDecoder::setSizeOffset(size_t sizeOffset)
+{
+    m_sizeOffset = sizeOffset;
+}
+
+void GIFImageDecoder::setSizeOffsetOptimized(size_t sizeOffsetOptimized)
+{
+    m_sizeOffsetOptimized = sizeOffsetOptimized;
+}
+
 bool GIFImageDecoder::frameComplete(size_t frameIndex)
 {
     // Initialize the frame if necessary.  Some GIFs insert do-nothing frames,
     // in which case we never reach haveDecodedRow() before getting here.
     ImageFrame& buffer = m_frameBufferCache[frameIndex];
     if ((buffer.status() == ImageFrame::FrameEmpty) && !initFrameBuffer(frameIndex))
         return false; // initFrameBuffer() has already called setFailed().
 
     buffer.setStatus(ImageFrame::FrameComplete);
 
@@ skipping 123 matching lines @@
             return;
         }
 
         // We need more data to continue decoding.
         if (m_frameBufferCache[*i].status() != ImageFrame::FrameComplete)
             break;
     }
 
     // It is also a fatal error if all data is received and we have decoded all
     // frames available but the file is truncated.
-    if (index >= m_frameBufferCache.size() - 1 && isAllDataReceived() && m_reader && !m_reader->parseCompleted())
+    if (index >= m_frameBufferCache.size() - 1 && isAllDataReceived() && m_reader && !m_reader->parseCompleted()) {
         setFailed();
+        return;
+    }
+    Platform::current()->histogramCustomCounts(
+        "Blink.Images.SizeOffsetOptimized_GIF", m_sizeOffsetOptimized, 1, 1000000, 50);

[Alexei Svitkine (slow), 2016/02/01 20:51:11]

If you prefer, you can use . instead of _ and specify separator="." in the xml.

+    Platform::current()->histogramCustomCounts(
+        "Blink.Images.SizeOffset_GIF", m_sizeOffset, 1, 1000000, 50);
 }
 
 void GIFImageDecoder::parse(GIFParseQuery query)
 {
     if (failed())
         return;
 
     if (!m_reader) {
         m_reader = adoptPtr(new GIFImageReader(this));
         m_reader->setData(m_data);
@@ skipping 32 matching lines @@
 
     // Update our status to be partially complete.
     buffer->setStatus(ImageFrame::FramePartial);
 
     // Reset the alpha pixel tracker for this frame.
     m_currentBufferSawAlpha = false;
     return true;
 }
 
 } // namespace blink