Add image color space histograms

third_party/WebKit/Source/platform/image-decoders/ImageDecoder.cpp

 /*
  * Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Library General Public
  *  License as published by the Free Software Foundation; either
  *  version 2 of the License, or (at your option) any later version.
  *
  *  This library is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 156 matching lines @@
   if (index >= frameCount())
     return 0;
 
   ImageFrame* frame = &m_frameBufferCache[index];
   if (frame->getStatus() != ImageFrame::FrameComplete) {
     PlatformInstrumentation::willDecodeImage(filenameExtension());
     decode(index);
     PlatformInstrumentation::didDecodeImage();
   }
 
+  if (!m_hasHistogrammedColorSpace) {
+    BitmapImageMetrics::countImageGamma(m_embeddedColorSpace.get());
+    m_hasHistogrammedColorSpace = true;
+  }
+
   frame->notifyBitmapIfPixelsChanged();
   return frame;
 }
 
 bool ImageDecoder::frameHasAlphaAtIndex(size_t index) const {
   return !frameIsCompleteAtIndex(index) || m_frameBufferCache[index].hasAlpha();
 }
 
 bool ImageDecoder::frameIsCompleteAtIndex(size_t index) const {
   return (index < m_frameBufferCache.size()) &&
@@ skipping 161 matching lines @@
   SpinLock::Guard guard(gTargetColorSpaceLock);
 
   // Layout tests expect that only the first call will take effect.
   if (gTargetColorSpace)
     return;
 
   gTargetColorSpace =
       SkColorSpace::MakeICC(profile.data(), profile.size()).release();
 
   // UMA statistics.
-  BitmapImageMetrics::countGamma(gTargetColorSpace);
+  BitmapImageMetrics::countOutputGamma(gTargetColorSpace);
 }
 
 sk_sp<SkColorSpace> ImageDecoder::colorSpace() const {
   // TODO(ccameron): This should always return a non-null SkColorSpace. This is
   // disabled for now because specifying a non-renderable color space results in
   // errors.
   // https://bugs.chromium.org/p/skia/issues/detail?id=5907
   if (!RuntimeEnabledFeatures::colorCorrectRenderingEnabled())
     return nullptr;
 
   if (m_embeddedColorSpace)
     return m_embeddedColorSpace;
   return SkColorSpace::MakeNamed(SkColorSpace::kSRGB_Named);
 }
 
 void ImageDecoder::setColorProfileAndComputeTransform(const char* iccData,
                                                       unsigned iccLength) {
   sk_sp<SkColorSpace> colorSpace = SkColorSpace::MakeICC(iccData, iccLength);
   if (!colorSpace)
     DLOG(ERROR) << "Failed to parse image ICC profile";
   setColorSpaceAndComputeTransform(std::move(colorSpace));
 }
 
 void ImageDecoder::setColorSpaceAndComputeTransform(
     sk_sp<SkColorSpace> colorSpace) {
   DCHECK(!m_ignoreColorSpace);
+  DCHECK(!m_hasHistogrammedColorSpace);
 
   m_embeddedColorSpace = colorSpace;
 
   m_sourceToOutputDeviceColorTransform = nullptr;
 
   // With color correct rendering, we do not transform to the output color space
   // at decode time.  Instead, we tag the raw image pixels and pass the tagged
   // SkImage to Skia.
   if (RuntimeEnabledFeatures::colorCorrectRenderingEnabled())
     return;
@@ skipping 14 matching lines @@
 
   if (SkColorSpace::Equals(m_embeddedColorSpace.get(), gTargetColorSpace)) {
     return;
   }
 
   m_sourceToOutputDeviceColorTransform =
       SkColorSpaceXform::New(m_embeddedColorSpace.get(), gTargetColorSpace);
 }
 
 }  // namespace blink