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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 BitmapImage_h
#define BitmapImage_h
#include "Image.h"
#include "Color.h"
#include "IntSize.h"
#if PLATFORM(MAC)
#include <wtf/RetainPtr.h>
#ifdef __OBJC__
@class NSImage;
#else
class NSImage;
#endif
#endif
#if PLATFORM(WIN)
typedef struct HBITMAP__ *HBITMAP;
#endif
namespace WebCore {
struct FrameData;
}
// This complicated-looking declaration tells the FrameData Vector that it should copy without
// invoking our constructor or destructor. This allows us to have a vector even for a struct
// that's not copyable.
namespace WTF {
template<> class VectorTraits<WebCore::FrameData> : public SimpleClassVectorTraits {};
}
namespace WebCore {
template <typename T> class Timer;
// ================================================
// FrameData Class
// ================================================
struct FrameData : Noncopyable {
FrameData()
: m_frame(0)
, m_duration(0)
, m_hasAlpha(true)
{
}
~FrameData()
{
clear();
}
void clear();
NativeImagePtr m_frame;
float m_duration;
bool m_hasAlpha;
};
// =================================================
// BitmapImage Class
// =================================================
class BitmapImage : public Image {
friend class GeneratedImage;
friend class GraphicsContext;
public:
#if PLATFORM(CG)
BitmapImage(CGImageRef, ImageObserver* = 0);
#elif PLATFORM(CAIRO)
BitmapImage(cairo_surface_t*, ImageObserver* = 0);
#endif
BitmapImage(ImageObserver* = 0);
~BitmapImage();
virtual bool isBitmapImage() const { return true; }
virtual IntSize size() const;
virtual bool dataChanged(bool allDataReceived);
// 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();
virtual unsigned decodedSize() const { return m_decodedSize; }
#if PLATFORM(MAC)
// Accessors for native image formats.
virtual NSImage* getNSImage();
virtual CFDataRef getTIFFRepresentation();
#endif
#if PLATFORM(CG)
virtual CGImageRef getCGImageRef();
#endif
#if PLATFORM(QT)
virtual QPixmap* getPixmap() const;
#endif
#if PLATFORM(WIN)
virtual bool getHBITMAP(HBITMAP);
virtual bool getHBITMAPOfSize(HBITMAP, LPSIZE);
#endif
virtual NativeImagePtr nativeImageForCurrentFrame() { return frameAtIndex(currentFrame()); }
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);
#if PLATFORM(QT) || PLATFORM(WX)
virtual void drawPattern(GraphicsContext*, const FloatRect& srcRect, const AffineTransform& patternTransform,
const FloatPoint& phase, CompositeOperator, const FloatRect& destRect);
#endif
size_t currentFrame() const { return m_currentFrame; }
size_t frameCount();
NativeImagePtr frameAtIndex(size_t);
float frameDurationAtIndex(size_t);
bool frameHasAlphaAtIndex(size_t);
// Decodes and caches a frame. Never accessed except internally.
void cacheFrame(size_t index);
// Called to invalidate all our cached data. If an image is loading incrementally, we only
// invalidate the last cached frame.
virtual void destroyDecodedData(bool incremental = false);
// Whether or not size is available yet.
bool isSizeAvailable();
// Animation.
bool shouldAnimate();
virtual void startAnimation();
void advanceAnimation(Timer<BitmapImage>*);
// Handle platform-specific data
void initPlatformData();
void invalidatePlatformData();
// Checks to see if the image is a 1x1 solid color. We optimize these images and just do a fill rect instead.
void checkForSolidColor();
virtual bool mayFillWithSolidColor() const { return m_isSolidColor && m_currentFrame == 0; }
virtual Color solidColor() const { return m_solidColor; }
ImageSource m_source;
mutable IntSize m_size; // The size to use for the overall image (will just be the size of the first image).
size_t m_currentFrame; // The index of the current frame of animation.
Vector<FrameData> m_frames; // An array of the cached frames of the animation. We have to ref frames to pin them in the cache.
Timer<BitmapImage>* m_frameTimer;
int m_repetitionCount; // How many total animation loops we should do.
int m_repetitionsComplete; // How many repetitions we've finished.
#if PLATFORM(MAC)
mutable RetainPtr<NSImage> m_nsImage; // A cached NSImage of frame 0. Only built lazily if someone actually queries for one.
mutable RetainPtr<CFDataRef> m_tiffRep; // Cached TIFF rep for frame 0. Only built lazily if someone queries for one.
#endif
Color m_solidColor; // If we're a 1x1 solid color, this is the color to use to fill.
bool m_isSolidColor; // Whether or not we are a 1x1 solid image.
bool m_animatingImageType; // Whether or not we're an image type that is capable of animating (GIF).
bool m_animationFinished; // Whether or not we've completed the entire animation.
bool m_allDataReceived; // Whether or not we've received all our data.
mutable bool m_haveSize; // Whether or not our |m_size| member variable has the final overall image size yet.
bool m_sizeAvailable; // Whether or not we can obtain the size of the first image frame yet from ImageIO.
unsigned m_decodedSize; // The current size of all decoded frames.
mutable bool m_haveFrameCount;
size_t m_frameCount;
};
}
#endif
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