Remove image decoder down sampling

Source/core/platform/image-decoders/ImageDecoder.cpp

 /*
- * Copyright (C) 2008-2009 Torch Mobile, Inc.
  * 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
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
@@ skipping 119 matching lines @@
         return 0;
     // FIXME: Use the dimension of the requested frame.
     return m_size.area() * sizeof(ImageFrame::PixelData);
 }
 
 void ImageDecoder::reportMemoryUsage(MemoryObjectInfo* memoryObjectInfo) const
 {
     MemoryClassInfo info(memoryObjectInfo, this, PlatformMemoryTypes::Image);
     info.addMember(m_data, "data");
     info.addMember(m_frameBufferCache, "frameBufferCache");
-    info.addMember(m_scaledColumns, "scaledColumns");
-    info.addMember(m_scaledRows, "scaledRows");
-}
-
-// FIXME: don't add any more code below this line: the code below is related to
-// ENABLE(IMAGE_DECODER_DOWN_SAMPLING), a feature chrome does not use, and does
-// test, and does not need. It is therefore earmarked for removal.
-
-enum MatchType {
-    Exact,
-    UpperBound,
-    LowerBound
-};
-
-inline void fillScaledValues(Vector<int>& scaledValues, double scaleRate, int length)
-{
-    double inflateRate = 1. / scaleRate;
-    scaledValues.reserveCapacity(static_cast<int>(length * scaleRate + 0.5));
-    for (int scaledIndex = 0; ; ++scaledIndex) {
-        int index = static_cast<int>(scaledIndex * inflateRate + 0.5);
-        if (index >= length)
-            break;
-        scaledValues.append(index);
-    }
-}
-
-template <MatchType type> static int getScaledValue(const Vector<int>& scaledValues, int valueToMatch, int searchStart)
-{
-    if (scaledValues.isEmpty())
-        return valueToMatch;
-
-    const int* dataStart = scaledValues.data();
-    const int* dataEnd = dataStart + scaledValues.size();
-    const int* matched = std::lower_bound(dataStart + searchStart, dataEnd, valueToMatch);
-    switch (type) {
-    case Exact:
-        return matched != dataEnd && *matched == valueToMatch ? matched - dataStart : -1;
-    case LowerBound:
-        return matched != dataEnd && *matched == valueToMatch ? matched - dataStart : matched - dataStart - 1;
-    case UpperBound:
-    default:
-        return matched != dataEnd ? matched - dataStart : -1;
-    }
-}
-
-void ImageDecoder::prepareScaleDataIfNecessary()
-{
-    m_scaled = false;
-    m_scaledColumns.clear();
-    m_scaledRows.clear();
-
-    int width = size().width();
-    int height = size().height();
-    int numPixels = height * width;
-    if (m_maxNumPixels <= 0 || numPixels <= m_maxNumPixels)
-        return;
-
-    m_scaled = true;
-    double scale = sqrt(m_maxNumPixels / (double)numPixels);
-    fillScaledValues(m_scaledColumns, scale, width);
-    fillScaledValues(m_scaledRows, scale, height);
-}
-
-int ImageDecoder::upperBoundScaledX(int origX, int searchStart)
-{
-    return getScaledValue<UpperBound>(m_scaledColumns, origX, searchStart);
-}
-
-int ImageDecoder::lowerBoundScaledX(int origX, int searchStart)
-{
-    return getScaledValue<LowerBound>(m_scaledColumns, origX, searchStart);
-}
-
-int ImageDecoder::upperBoundScaledY(int origY, int searchStart)
-{
-    return getScaledValue<UpperBound>(m_scaledRows, origY, searchStart);
-}
-
-int ImageDecoder::lowerBoundScaledY(int origY, int searchStart)
-{
-    return getScaledValue<LowerBound>(m_scaledRows, origY, searchStart);
-}
-
-int ImageDecoder::scaledY(int origY, int searchStart)
-{
-    return getScaledValue<Exact>(m_scaledRows, origY, searchStart);
 }
 
 } // namespace WebCore