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/*
* 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 "Color.h"
#include "GraphicsTypes.h"
#include "ImageSource.h"
#include <wtf/RefPtr.h>
#include <wtf/PassRefPtr.h>
#include "SharedBuffer.h"
#if PLATFORM(MAC)
#ifdef __OBJC__
@class NSImage;
#else
class NSImage;
#endif
#endif
#if PLATFORM(CG)
struct CGContext;
#endif
#if PLATFORM(WIN)
typedef struct HBITMAP__ *HBITMAP;
#endif
#if PLATFORM(QT)
#include <QPixmap>
#endif
namespace WebCore {
class AffineTransform;
class FloatPoint;
class FloatRect;
class FloatSize;
class GraphicsContext;
class IntRect;
class IntSize;
class SharedBuffer;
class String;
// This class gets notified when an image creates or destroys decoded frames and when it advances animation frames.
class ImageObserver;
class Image : Noncopyable {
friend class GeneratedImage;
friend class GraphicsContext;
public:
Image(ImageObserver* = 0);
virtual ~Image();
static Image* loadPlatformResource(const char* name);
static bool supportsType(const String&);
virtual bool isBitmapImage() const { return false; }
bool isNull() const;
// These are only used for SVGImage right now
virtual bool isSVGImage() const { return false; }
virtual void setContainerSize(const IntSize&) { }
virtual bool usesContainerSize() const { return false; }
virtual bool hasRelativeWidth() const { return false; }
virtual bool hasRelativeHeight() const { return false; }
virtual IntSize size() const = 0;
IntRect rect() const;
int width() const;
int height() const;
bool setData(PassRefPtr<SharedBuffer> data, bool allDataReceived);
virtual bool dataChanged(bool allDataReceived) { return false; }
// FIXME: PDF/SVG will be underreporting decoded sizes and will be unable to prune because these functions are not
// implemented yet for those image types.
virtual void destroyDecodedData(bool incremental = false) {};
virtual unsigned decodedSize() const { return 0; }
SharedBuffer* data() { return m_data.get(); }
// It may look unusual that there is no start animation call as public API. This is because
// we start and stop animating lazily. Animation begins whenever someone draws the image. It will
// automatically pause once all observers no longer want to render the image anywhere.
virtual void stopAnimation() {}
virtual void resetAnimation() {}
// Typically the CachedImage that owns us.
ImageObserver* imageObserver() const { return m_imageObserver; }
enum TileRule { StretchTile, RoundTile, RepeatTile };
virtual NativeImagePtr nativeImageForCurrentFrame() { return 0; }
#if PLATFORM(MAC)
// Accessors for native image formats.
virtual NSImage* getNSImage() { return 0; }
virtual CFDataRef getTIFFRepresentation() { return 0; }
#endif
#if PLATFORM(CG)
virtual CGImageRef getCGImageRef() { return 0; }
#endif
#if PLATFORM(QT)
virtual QPixmap* getPixmap() const { return 0; }
#endif
#if PLATFORM(WIN)
virtual bool getHBITMAP(HBITMAP) { return false; }
virtual bool getHBITMAPOfSize(HBITMAP, LPSIZE) { return false; }
#endif
protected:
static void fillWithSolidColor(GraphicsContext* ctxt, const FloatRect& dstRect, const Color& color, CompositeOperator op);
protected:
#if PLATFORM(WIN)
virtual void drawFrameMatchingSourceSize(GraphicsContext*, const FloatRect& dstRect, const IntSize& srcSize, CompositeOperator) { }
#endif
virtual void draw(GraphicsContext*, const FloatRect& dstRect, const FloatRect& srcRect, CompositeOperator) = 0;
void drawTiled(GraphicsContext*, const FloatRect& dstRect, const FloatPoint& srcPoint, const FloatSize& tileSize, CompositeOperator);
void drawTiled(GraphicsContext*, const FloatRect& dstRect, const FloatRect& srcRect, TileRule hRule, TileRule vRule, CompositeOperator);
// Supporting tiled drawing
virtual bool mayFillWithSolidColor() const { return false; }
virtual Color solidColor() const { return Color(); }
virtual void startAnimation() { }
virtual void drawPattern(GraphicsContext*, const FloatRect& srcRect, const AffineTransform& patternTransform,
const FloatPoint& phase, CompositeOperator, const FloatRect& destRect);
#if PLATFORM(CG)
// These are private to CG. Ideally they would be only in the .cpp file, but the callback requires access
// to the private function nativeImageForCurrentFrame()
static void drawPatternCallback(void* info, CGContext*);
#endif
protected:
RefPtr<SharedBuffer> m_data; // The encoded raw data for the image.
ImageObserver* m_imageObserver;
};
}
#endif
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