Moving GraphicsContext and dependencies from core to platform.

Source/core/platform/graphics/skia/NativeImageSkia.h

Index: Source/core/platform/graphics/skia/NativeImageSkia.h
diff --git a/Source/core/platform/graphics/skia/NativeImageSkia.h b/Source/core/platform/graphics/skia/NativeImageSkia.h
deleted file mode 100644
index 996ff7bdcfcef9652ce475254ad17c8c91387fcc..0000000000000000000000000000000000000000
--- a/Source/core/platform/graphics/skia/NativeImageSkia.h
+++ /dev/null
@@ -1,207 +0,0 @@
-/*
- * Copyright (c) 2008, Google 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:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * 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.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "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 THE COPYRIGHT
- * OWNER 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.
- */
-
-#ifndef NativeImageSkia_h
-#define NativeImageSkia_h
-
-#include "SkBitmap.h"
-#include "SkRect.h"
-#include "SkSize.h"
-#include "SkXfermode.h"
-#include "platform/geometry/IntSize.h"
-#include "platform/graphics/GraphicsTypes.h"
-#include "wtf/Forward.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefCounted.h"
-
-class SkMatrix;
-class SkPaint;
-
-namespace WebCore {
-
-class FloatPoint;
-class FloatRect;
-class FloatSize;
-class GraphicsContext;
-
-// Used by computeResamplingMode to tell how bitmaps should be resampled.
-enum ResamplingMode {
-    // Nearest neighbor resampling. Used when we detect that the page is
-    // trying to make a pattern by stretching a small bitmap very large.
-    NoResampling,
-
-    // Default skia resampling. Used for large growing of images where high
-    // quality resampling doesn't get us very much except a slowdown.
-    LinearResampling,
-
-    // High quality resampling.
-    AwesomeResampling,
-};
-
-// This object is used as the "native image" in our port. When WebKit uses
-// PassNativeImagePtr / NativeImagePtr, it is a smart pointer to this type.
-// It has an SkBitmap, and also stores a cached resized image.
-class NativeImageSkia : public RefCounted<NativeImageSkia> {
-public:
-    static PassRefPtr<NativeImageSkia> create()
-    {
-        return adoptRef(new NativeImageSkia());
-    }
-
-    // This factory method does a shallow copy of the passed-in SkBitmap
-    // (ie., it references the same pixel data and bumps the refcount). Use
-    // only when you want sharing semantics.
-    static PassRefPtr<NativeImageSkia> create(const SkBitmap& bitmap, float resolutionScale = 1)
-    {
-        return adoptRef(new NativeImageSkia(bitmap, resolutionScale));
-    }
-
-    // This method does a shallow copy of the internal SkBitmap (ie., it
-    // references the same pixel data and bumps the refcount). Use only when
-    // you want sharing semantics.
-    PassRefPtr<NativeImageSkia> clone() const
-    {
-        return adoptRef(new NativeImageSkia(m_image, m_resolutionScale, m_resizedImage, m_cachedImageInfo, m_resizeRequests));
-    }
-
-    ~NativeImageSkia();
-
-    // Returns the number of bytes of image data. This includes the cached
-    // resized version if there is one.
-    int decodedSize() const;
-
-    // Sets the immutable flag on the bitmap, indicating that the image data
-    // will not be modified any further. This is called by the image decoder
-    // when all data is complete, used by us to know whether we can cache
-    // resized images, and used by Skia for various optimizations.
-    void setDataComplete() { m_image.setImmutable(); }
-
-    // Returns true if the entire image has been decoded.
-    bool isDataComplete() const { return m_image.isImmutable(); }
-
-    // Get reference to the internal SkBitmap representing this image.
-    const SkBitmap& bitmap() const { return m_image; }
-    SkBitmap& bitmap() { return m_image; }
-
-    float resolutionScale() const { return m_resolutionScale; }
-
-    // We can keep a resized version of the bitmap cached on this object.
-    // This function will return true if there is a cached version of the given
-    // scale and subset.
-    bool hasResizedBitmap(const SkISize& scaledImageSize, const SkIRect& scaledImageSubset) const;
-
-    // This will return an existing resized image subset, or generate a new one
-    // of the specified size and subset and possibly cache it.
-    //
-    // scaledImageSize
-    // Dimensions of the scaled full image.
-    //
-    // scaledImageSubset
-    // Rectangle of the subset in the scaled image.
-    SkBitmap resizedBitmap(const SkISize& scaledImageSize, const SkIRect& scaledImageSubset) const;
-
-    void draw(GraphicsContext*, const SkRect& srcRect, const SkRect& destRect, PassRefPtr<SkXfermode>) const;
-    void drawPattern(
-        GraphicsContext*,
-        const FloatRect& srcRect,
-        const FloatSize& scale,
-        const FloatPoint& phase,
-        CompositeOperator,
-        const FloatRect& destRect,
-        blink::WebBlendMode,
-        const IntSize& repeatSpacing) const;
-
-private:
-    NativeImageSkia();
-
-    NativeImageSkia(const SkBitmap&, float resolutionScale);
-
-    // ImageResourceInfo is used to uniquely identify cached or requested image
-    // resizes.
-    // Image resize is identified by the scaled image size and scaled image subset.
-    struct ImageResourceInfo {
-        SkISize scaledImageSize;
-        SkIRect scaledImageSubset;
-
-        ImageResourceInfo();
-
-        bool isEqual(const SkISize& otherScaledImageSize, const SkIRect& otherScaledImageSubset) const;
-        void set(const SkISize& otherScaledImageSize, const SkIRect& otherScaledImageSubset);
-        SkIRect rectInSubset(const SkIRect& otherScaledImageRect);
-    };
-
-    NativeImageSkia(const SkBitmap& image, float resolutionScale, const SkBitmap& resizedImage, const ImageResourceInfo&, int resizeRequests);
-
-    // Returns true if the given resize operation should either resize the whole
-    // image and cache it, or resize just the part it needs and throw the result
-    // away.
-    //
-    // Calling this function may increment a request count that can change the
-    // result of subsequent calls.
-    //
-    // On the one hand, if only a small subset is desired, then we will waste a
-    // lot of time resampling the entire thing, so we only want to do exactly
-    // what's required. On the other hand, resampling the entire bitmap is
-    // better if we're going to be using it more than once (like a bitmap
-    // scrolling on and off the screen. Since we only cache when doing the
-    // entire thing, it's best to just do it up front.
-    bool shouldCacheResampling(const SkISize& scaledImageSize, const SkIRect& scaledImageSubset) const;
-
-    ResamplingMode computeResamplingMode(const SkMatrix&, float srcWidth, float srcHeight, float destWidth, float destHeight) const;
-    SkBitmap extractScaledImageFragment(const SkRect& srcRect, float scaleX, float scaleY, SkRect* scaledSrcRect) const;
-    void drawResampledBitmap(GraphicsContext*, SkPaint&, const SkRect& srcRect, const SkRect& destRect) const;
-
-    // The original image.
-    SkBitmap m_image;
-    float m_resolutionScale;
-
-    // The cached bitmap fragment. This is a subset of the scaled version of
-    // |m_image|. empty() returns true if there is no cached image.
-    mutable SkBitmap m_resizedImage;
-
-    // References how many times that the image size has been requested for
-    // the last size.
-    //
-    // Every time we get a call to shouldCacheResampling, if it matches the
-    // m_cachedImageInfo, we'll increment the counter, and if not, we'll reset
-    // the counter and save the dimensions.
-    //
-    // This allows us to see if many requests have been made for the same
-    // resized image, we know that we should probably cache it, even if all of
-    // those requests individually are small and would not otherwise be cached.
-    //
-    // We also track scaling information and destination subset for the scaled
-    // image. See comments for ImageResourceInfo.
-    mutable ImageResourceInfo m_cachedImageInfo;
-    mutable int m_resizeRequests;
-};
-
-}
-#endif  // NativeImageSkia_h