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/*
* Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2007, 2008, 2009 Apple Inc. All rights reserved.
* Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. 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 ImageBuffer_h
#define ImageBuffer_h
#include "AffineTransform.h"
#include "ColorSpace.h"
#include "FloatRect.h"
#include "GraphicsContext.h"
#if USE(ACCELERATED_COMPOSITING)
#include "PlatformLayer.h"
#endif
#include "GraphicsTypes.h"
#include "GraphicsTypes3D.h"
#include "IntSize.h"
#include "ImageBufferData.h"
#include <wtf/Forward.h>
#include <wtf/OwnPtr.h>
#include <wtf/PassOwnPtr.h>
#include <wtf/PassRefPtr.h>
#include <wtf/Uint8ClampedArray.h>
#include <wtf/Vector.h>
#if PLATFORM(QT)
QT_BEGIN_NAMESPACE
class QOpenGLContext;
QT_END_NAMESPACE
#endif
namespace WebCore {
class Image;
class ImageData;
class IntPoint;
class IntRect;
class GraphicsContext3D;
enum Multiply {
Premultiplied,
Unmultiplied
};
enum RenderingMode {
Unaccelerated,
UnacceleratedNonPlatformBuffer, // Use plain memory allocation rather than platform API to allocate backing store.
Accelerated
};
enum BackingStoreCopy {
CopyBackingStore, // Guarantee subsequent draws don't affect the copy.
DontCopyBackingStore // Subsequent draws may affect the copy.
};
enum ScaleBehavior {
Scaled,
Unscaled
};
class ImageBuffer {
WTF_MAKE_NONCOPYABLE(ImageBuffer); WTF_MAKE_FAST_ALLOCATED;
public:
// Will return a null pointer on allocation failure.
static PassOwnPtr<ImageBuffer> create(const IntSize& size, float resolutionScale = 1, ColorSpace colorSpace = ColorSpaceDeviceRGB, RenderingMode renderingMode = Unaccelerated)
{
bool success = false;
OwnPtr<ImageBuffer> buf = adoptPtr(new ImageBuffer(size, resolutionScale, colorSpace, renderingMode, success));
if (!success)
return nullptr;
return buf.release();
}
static PassOwnPtr<ImageBuffer> createCompatibleBuffer(const IntSize&, float resolutionScale, ColorSpace, const GraphicsContext*, bool hasAlpha);
#if PLATFORM(QT) && ENABLE(ACCELERATED_2D_CANVAS)
static PassOwnPtr<ImageBuffer> createCompatibleBuffer(const IntSize&, float resolutionScale, ColorSpace, QOpenGLContext*);
#endif
~ImageBuffer();
// The actual resolution of the backing store
const IntSize& internalSize() const { return m_size; }
const IntSize& logicalSize() const { return m_logicalSize; }
GraphicsContext* context() const;
PassRefPtr<Image> copyImage(BackingStoreCopy = CopyBackingStore, ScaleBehavior = Scaled) const;
// Give hints on the faster copyImage Mode, return DontCopyBackingStore if it supports the DontCopyBackingStore behavior
// or return CopyBackingStore if it doesn't.
static BackingStoreCopy fastCopyImageMode();
enum CoordinateSystem { LogicalCoordinateSystem, BackingStoreCoordinateSystem };
PassRefPtr<Uint8ClampedArray> getUnmultipliedImageData(const IntRect&, CoordinateSystem = LogicalCoordinateSystem) const;
PassRefPtr<Uint8ClampedArray> getPremultipliedImageData(const IntRect&, CoordinateSystem = LogicalCoordinateSystem) const;
void putByteArray(Multiply multiplied, Uint8ClampedArray*, const IntSize& sourceSize, const IntRect& sourceRect, const IntPoint& destPoint, CoordinateSystem = LogicalCoordinateSystem);
void convertToLuminanceMask();
String toDataURL(const String& mimeType, const double* quality = 0, CoordinateSystem = LogicalCoordinateSystem) const;
#if !USE(CG)
AffineTransform baseTransform() const { return AffineTransform(); }
void transformColorSpace(ColorSpace srcColorSpace, ColorSpace dstColorSpace);
void platformTransformColorSpace(const Vector<int>&);
#else
AffineTransform baseTransform() const { return AffineTransform(1, 0, 0, -1, 0, internalSize().height()); }
#endif
#if USE(ACCELERATED_COMPOSITING)
PlatformLayer* platformLayer() const;
#endif
// FIXME: current implementations of this method have the restriction that they only work
// with textures that are RGB or RGBA format, and UNSIGNED_BYTE type.
bool copyToPlatformTexture(GraphicsContext3D&, Platform3DObject, GC3Denum, bool, bool);
private:
#if USE(CG)
PassNativeImagePtr copyNativeImage(BackingStoreCopy = CopyBackingStore) const;
void flushContext() const;
void flushContextIfNecessary() const;
#endif
void clip(GraphicsContext*, const FloatRect&) const;
void draw(GraphicsContext*, ColorSpace, const FloatRect& destRect, const FloatRect& srcRect = FloatRect(0, 0, -1, -1), CompositeOperator = CompositeSourceOver, BlendMode = BlendModeNormal, bool useLowQualityScale = false);
void drawPattern(GraphicsContext*, const FloatRect& srcRect, const AffineTransform& patternTransform, const FloatPoint& phase, ColorSpace styleColorSpace, CompositeOperator, const FloatRect& destRect);
inline void genericConvertToLuminanceMask();
friend class GraphicsContext;
friend class GeneratedImage;
friend class CrossfadeGeneratedImage;
friend class GeneratorGeneratedImage;
private:
ImageBufferData m_data;
IntSize m_size;
IntSize m_logicalSize;
float m_resolutionScale;
OwnPtr<GraphicsContext> m_context;
// This constructor will place its success into the given out-variable
// so that create() knows when it should return failure.
ImageBuffer(const IntSize&, float resolutionScale, ColorSpace, RenderingMode, bool& success);
#if PLATFORM(QT) && ENABLE(ACCELERATED_2D_CANVAS)
ImageBuffer(const IntSize&, float resolutionScale, ColorSpace, QOpenGLContext*, bool& success);
#endif
};
#if USE(CG)
String ImageDataToDataURL(const ImageData&, const String& mimeType, const double* quality);
#endif
} // namespace WebCore
#endif // ImageBuffer_h
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