Moving GraphicsContext and dependencies from core to platform.

Source/core/platform/graphics/Image.h

-/*
- * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
- * Copyright (C) 2004, 2005, 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.
- */
-
-#ifndef Image_h
-#define Image_h
-
-#include "core/platform/graphics/skia/NativeImageSkia.h"
-#include "platform/geometry/IntRect.h"
-#include "platform/graphics/Color.h"
-#include "platform/graphics/GraphicsTypes.h"
-#include "platform/graphics/ImageOrientation.h"
-#include "third_party/skia/include/core/SkXfermode.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefCounted.h"
-#include "wtf/RefPtr.h"
-#include "wtf/RetainPtr.h"
-#include "wtf/text/WTFString.h"
-
-namespace WebCore {
-
-class FloatPoint;
-class FloatRect;
-class FloatSize;
-class GraphicsContext;
-class Length;
-class SharedBuffer;
-
-// This class gets notified when an image creates or destroys decoded frames and when it advances animation frames.
-class ImageObserver;
-
-class Image : public RefCounted<Image> {
-    friend class GeneratedImage;
-    friend class CrossfadeGeneratedImage;
-    friend class GradientGeneratedImage;
-    friend class GraphicsContext;
-
-public:
-    virtual ~Image();
-
-    static PassRefPtr<Image> loadPlatformResource(const char* name);
-    static bool supportsType(const String&);
-
-    virtual bool isSVGImage() const { return false; }
-    virtual bool isBitmapImage() const { return false; }
-    virtual bool currentFrameKnownToBeOpaque() = 0;
-
-    // Derived classes should override this if they can assure that the current
-    // image frame contains only resources from its own security origin.
-    virtual bool currentFrameHasSingleSecurityOrigin() const { return false; }
-
-    static Image* nullImage();
-    bool isNull() const { return size().isEmpty(); }
-
-    virtual void setContainerSize(const IntSize&) { }
-    virtual bool usesContainerSize() const { return false; }
-    virtual bool hasRelativeWidth() const { return false; }
-    virtual bool hasRelativeHeight() const { return false; }
-    virtual void computeIntrinsicDimensions(Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio);
-
-    virtual IntSize size() const = 0;
-    IntRect rect() const { return IntRect(IntPoint(), size()); }
-    int width() const { return size().width(); }
-    int height() const { return size().height(); }
-    virtual bool getHotSpot(IntPoint&) const { return false; }
-
-    bool setData(PassRefPtr<SharedBuffer> data, bool allDataReceived);
-    virtual bool dataChanged(bool /*allDataReceived*/) { return false; }
-
-    virtual String filenameExtension() const { return String(); } // null string if unknown
-
-    virtual void destroyDecodedData(bool destroyAll) = 0;
-
-    SharedBuffer* data() { return m_encodedImageData.get(); }
-
-    // Animation begins whenever someone draws the image, so startAnimation() is not normally called.
-    // It will automatically pause once all observers no longer want to render the image anywhere.
-    virtual void startAnimation(bool /*catchUpIfNecessary*/ = true) { }
-    virtual void stopAnimation() {}
-    virtual void resetAnimation() {}
-
-    // Typically the ImageResource that owns us.
-    ImageObserver* imageObserver() const { return m_imageObserver; }
-    void setImageObserver(ImageObserver* observer) { m_imageObserver = observer; }
-
-    enum TileRule { StretchTile, RoundTile, SpaceTile, RepeatTile };
-
-    virtual PassRefPtr<NativeImageSkia> nativeImageForCurrentFrame() { return 0; }
-
-    virtual void drawPattern(GraphicsContext*, const FloatRect&,
-        const FloatSize&, const FloatPoint& phase, CompositeOperator,
-        const FloatRect&, blink::WebBlendMode = blink::WebBlendModeNormal, const IntSize& repeatSpacing = IntSize());
-
-#if !ASSERT_DISABLED
-    virtual bool notSolidColor() { return true; }
-#endif
-
-protected:
-    Image(ImageObserver* = 0);
-
-    static void fillWithSolidColor(GraphicsContext*, const FloatRect& dstRect, const Color&, CompositeOperator);
-    static FloatRect adjustForNegativeSize(const FloatRect&); // A helper method for translating negative width and height values.
-
-    virtual void draw(GraphicsContext*, const FloatRect& dstRect, const FloatRect& srcRect, CompositeOperator, blink::WebBlendMode) = 0;
-    virtual void draw(GraphicsContext*, const FloatRect& dstRect, const FloatRect& srcRect, CompositeOperator, blink::WebBlendMode, RespectImageOrientationEnum);
-    void drawTiled(GraphicsContext*, const FloatRect& dstRect, const FloatPoint& srcPoint, const FloatSize& tileSize,
-        CompositeOperator, blink::WebBlendMode, const IntSize& repeatSpacing);
-    void drawTiled(GraphicsContext*, const FloatRect& dstRect, const FloatRect& srcRect, const FloatSize& tileScaleFactor, TileRule hRule, TileRule vRule, CompositeOperator);
-
-    // Supporting tiled drawing
-    virtual bool mayFillWithSolidColor() { return false; }
-    virtual Color solidColor() const { return Color(); }
-
-private:
-    RefPtr<SharedBuffer> m_encodedImageData;
-    ImageObserver* m_imageObserver;
-};
-
-}
-
-#endif