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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 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 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 "GraphicsTypes.h"
#include "GraphicsTypes3D.h"
#include "IntSize.h"
#include "ImageBufferData.h"
#include "PlatformLayer.h"
#include <runtime/Uint8ClampedArray.h>
#include <wtf/Forward.h>
#include <wtf/PassRefPtr.h>
#include <wtf/Vector.h>
#if PLATFORM(QT)
QT_BEGIN_NAMESPACE
class QOpenGLContext;
QT_END_NAMESPACE
#endif
namespace WebCore {
class FloatRect;
class GraphicsContext;
class GraphicsContext3D;
class Image;
class ImageData;
class IntPoint;
class IntRect;
enum Multiply {
Premultiplied,
Unmultiplied
};
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;
friend class IOSurface;
public:
// Will return a null pointer on allocation failure.
static std::unique_ptr<ImageBuffer> create(const FloatSize& size, RenderingMode renderingMode, float resolutionScale = 1, ColorSpace colorSpace = ColorSpaceSRGB)
{
bool success = false;
std::unique_ptr<ImageBuffer> buffer(new ImageBuffer(size, resolutionScale, colorSpace, renderingMode, success));
if (!success)
return nullptr;
return buffer;
}
static std::unique_ptr<ImageBuffer> createCompatibleBuffer(const FloatSize&, float resolutionScale, ColorSpace, const GraphicsContext&, bool hasAlpha);
#if PLATFORM(QT) && ENABLE(ACCELERATED_2D_CANVAS)
static std::unique_ptr<ImageBuffer> createCompatibleBuffer(const IntSize&, ColorSpace, QOpenGLContext*);
#endif
WEBCORE_EXPORT ~ImageBuffer();
// The actual resolution of the backing store
const IntSize& internalSize() const { return m_size; }
const IntSize& logicalSize() const { return m_logicalSize; }
FloatSize sizeForDestinationSize(FloatSize) const;
float resolutionScale() const { return m_resolutionScale; }
WEBCORE_EXPORT GraphicsContext& context() const;
WEBCORE_EXPORT RefPtr<Image> copyImage(BackingStoreCopy = CopyBackingStore, ScaleBehavior = Scaled) const;
WEBCORE_EXPORT static RefPtr<Image> sinkIntoImage(std::unique_ptr<ImageBuffer>, ScaleBehavior = Scaled);
// 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, m_data.backingStoreSize.height()); }
#endif
PlatformLayer* platformLayer() const;
#if USE(CAIRO)
NativeImagePtr nativeImage() 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&, GC3Denum, Platform3DObject, GC3Denum, bool, bool);
// These functions are used when clamping the ImageBuffer which is created for filter, masker or clipper.
static bool sizeNeedsClamping(const FloatSize&);
static bool sizeNeedsClamping(const FloatSize&, FloatSize& scale);
static FloatSize clampedSize(const FloatSize&);
static FloatSize clampedSize(const FloatSize&, FloatSize& scale);
static FloatRect clampedRect(const FloatRect&);
private:
#if USE(CG)
// The returned image might be larger than the internalSize(). If you want the smaller
// image, crop the result.
RetainPtr<CGImageRef> copyNativeImage(BackingStoreCopy = CopyBackingStore) const;
static RetainPtr<CGImageRef> sinkIntoNativeImage(std::unique_ptr<ImageBuffer>);
void flushContext() const;
#endif
void draw(GraphicsContext&, const FloatRect& destRect, const FloatRect& srcRect = FloatRect(0, 0, -1, -1), CompositeOperator = CompositeSourceOver, BlendMode = BlendModeNormal);
void drawPattern(GraphicsContext&, const FloatRect& srcRect, const AffineTransform& patternTransform, const FloatPoint& phase, const FloatSize& spacing, CompositeOperator, const FloatRect& destRect, BlendMode = BlendModeNormal);
static void drawConsuming(std::unique_ptr<ImageBuffer>, GraphicsContext&, const FloatRect& destRect, const FloatRect& srcRect = FloatRect(0, 0, -1, -1), CompositeOperator = CompositeSourceOver, BlendMode = BlendModeNormal);
inline void genericConvertToLuminanceMask();
friend class GraphicsContext;
friend class GeneratedImage;
friend class CrossfadeGeneratedImage;
friend class NamedImageGeneratedImage;
friend class GradientImage;
private:
ImageBufferData m_data;
IntSize m_size;
IntSize m_logicalSize;
float m_resolutionScale;
// This constructor will place its success into the given out-variable
// so that create() knows when it should return failure.
WEBCORE_EXPORT ImageBuffer(const FloatSize&, float resolutionScale, ColorSpace, RenderingMode, bool& success);
#if PLATFORM(QT) && ENABLE(ACCELERATED_2D_CANVAS)
ImageBuffer(const IntSize&, 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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