GIF decoding to Index8, unit tests and misusing unit test as benchmark

third_party/WebKit/Source/platform/image-decoders/ImageFrame.h

 /*
  * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) Research In Motion Limited 2009-2010. 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
@@ skipping 12 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef ImageFrame_h
 #define ImageFrame_h
 
 #include "platform/PlatformExport.h"
 #include "platform/geometry/IntRect.h"
 #include "third_party/skia/include/core/SkBitmap.h"
+#include "third_party/skia/include/core/SkColorPriv.h"
 #include "wtf/Assertions.h"
 #include "wtf/PassRefPtr.h"
 
 namespace blink {
 
 // ImageFrame represents the decoded image data.  This buffer is what all
 // decoders write a single frame into.
 class PLATFORM_EXPORT ImageFrame {
 public:
     enum Status { FrameEmpty, FramePartial, FrameComplete };
@@ skipping 16 matching lines @@
     enum AlphaBlendSource {
         // Blend non-opaque pixels atop the corresponding pixels in the
         // initial buffer state (i.e. any previous frame buffer after having
         // been properly disposed).
         BlendAtopPreviousFrame,
 
         // Blend non-opaque pixels against fully transparent (i.e. simply
         // overwrite the corresponding pixels).
         BlendAtopBgcolor,
     };
+    enum ColorType {
+        N32 = kN32_SkColorType,
+        Index8 = kIndex_8_SkColorType
+    };
     typedef uint32_t PixelData;
+    typedef uint8_t PixelData8;
 
     ImageFrame();
 
     // The assignment operator reads m_hasAlpha (inside setStatus()) before it
     // sets it (in setHasAlpha()).  This doesn't cause any problems, since the
     // setHasAlpha() call ensures all state is set correctly, but it means we
     // need to initialize m_hasAlpha to some value before calling the operator
     // lest any tools complain about using an uninitialized value.
     ImageFrame(const ImageFrame& other) : m_hasAlpha(false) { operator=(other); }
 
     // For backends which refcount their data, this operator doesn't need to
     // create a new copy of the image data, only increase the ref count.
     ImageFrame& operator=(const ImageFrame& other);
 
     // These do not touch other metadata, only the raw pixel data.
     void clearPixelData();
     void zeroFillPixelData();
     void zeroFillFrameRect(const IntRect&);
 
     // Makes this frame have an independent copy of the provided image's
     // pixel data, so that modifications in one frame are not reflected in
     // the other.  Returns whether the copy succeeded.
     bool copyBitmapData(const ImageFrame&);
+    bool copyBitmapData(const ImageFrame&, ImageFrame::ColorType);
 
     // Copies the pixel data at [(startX, startY), (endX, startY)) to the
     // same X-coordinates on each subsequent row up to but not including
     // endY.
     void copyRowNTimes(int startX, int endX, int startY, int endY)
     {
         ASSERT(startX < width());
         ASSERT(endX <= width());
         ASSERT(startY < height());
         ASSERT(endY <= height());
         const int rowBytes = (endX - startX) * sizeof(PixelData);
         const PixelData* const startAddr = getAddr(startX, startY);
         for (int destY = startY + 1; destY < endY; ++destY)
             memcpy(getAddr(startX, destY), startAddr, rowBytes);
     }
 
     // Allocates space for the pixel data.  Must be called before any pixels
     // are written.  Must only be called once.  Returns whether allocation
     // succeeded.
     bool setSize(int newWidth, int newHeight);
+    bool setSizeIndex8(int newWidth, int newHeight, const Vector<blink::ImageFrame::PixelData>& colorMap, size_t indexOfTransparent = kNotFound);
 
     // Returns a caller-owned pointer to the underlying native image data.
     // (Actual use: This pointer will be owned by BitmapImage and freed in
     // FrameData::clear()).
     const SkBitmap& bitmap() const;
 
     bool hasAlpha() const;
     const IntRect& originalFrameRect() const { return m_originalFrameRect; }
     Status status() const { return m_status; }
     unsigned duration() const { return m_duration; }
@@ skipping 16 matching lines @@
     // The pixelsChanged flag needs to be set when the raw pixel data was directly modified
     // (e.g. through a pointer or setRGBA). The flag is usually set after a batch of changes was made.
     void setPixelsChanged(bool pixelsChanged) { m_pixelsChanged = pixelsChanged; }
     void setRequiredPreviousFrameIndex(size_t previousFrameIndex) { m_requiredPreviousFrameIndex = previousFrameIndex; }
 
     inline PixelData* getAddr(int x, int y)
     {
         return m_bitmap.getAddr32(x, y);
     }
 
+    inline PixelData8* getAddr8(int x, int y)
+    {
+        return m_bitmap.getAddr8(x, y);
+    }
+
     inline void setRGBA(int x, int y, unsigned r, unsigned g, unsigned b, unsigned a)
     {
         setRGBA(getAddr(x, y), r, g, b, a);
     }
 
     inline void setRGBA(PixelData* dest, unsigned r, unsigned g, unsigned b, unsigned a)
     {
         if (m_premultiplyAlpha)
             setRGBAPremultiply(dest, r, g, b, a);
         else
@@ skipping 55 matching lines @@
     // The frame that must be decoded before this frame can be decoded.
     // WTF::kNotFound if this frame doesn't require any previous frame.
     // This is used by ImageDecoder::clearCacheExceptFrame(), and will never
     // be read for image formats that do not have multiple frames.
     size_t m_requiredPreviousFrameIndex;
 };
 
 } // namespace blink
 
 #endif