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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 "platform/PlatformExport.h"
#include "platform/geometry/FloatRect.h"
#include "platform/geometry/IntSize.h"
#include "platform/graphics/Canvas2DLayerBridge.h"
#include "platform/graphics/GraphicsTypes.h"
#include "platform/graphics/GraphicsTypes3D.h"
#include "platform/graphics/ImageBufferSurface.h"
#include "platform/transforms/AffineTransform.h"
#include "third_party/skia/include/core/SkPaint.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"
#include "wtf/text/WTFString.h"
namespace WTF {
class ArrayBufferContents;
} // namespace WTF
namespace blink {
class DrawingBuffer;
class GraphicsContext;
class Image;
class ImageBufferClient;
class IntPoint;
class IntRect;
class WebGraphicsContext3D;
enum Multiply {
Premultiplied,
Unmultiplied
};
class PLATFORM_EXPORT ImageBuffer {
WTF_MAKE_NONCOPYABLE(ImageBuffer); USING_FAST_MALLOC(ImageBuffer);
public:
static PassOwnPtr<ImageBuffer> create(const IntSize&, OpacityMode = NonOpaque, ImageInitializationMode = InitializeImagePixels);
static PassOwnPtr<ImageBuffer> create(PassOwnPtr<ImageBufferSurface>);
virtual ~ImageBuffer();
void setClient(ImageBufferClient* client) { m_client = client; }
const IntSize& size() const { return m_surface->size(); }
bool isAccelerated() const { return m_surface->isAccelerated(); }
bool isRecording() const { return m_surface->isRecording(); }
void setHasExpensiveOp() { m_surface->setHasExpensiveOp(); }
bool isExpensiveToPaint() const { return m_surface->isExpensiveToPaint(); }
void prepareSurfaceForPaintingIfNeeded() { m_surface->prepareSurfaceForPaintingIfNeeded(); }
bool isSurfaceValid() const;
bool restoreSurface() const;
void didDraw(const FloatRect&) const;
bool wasDrawnToAfterSnapshot() const { return m_snapshotState == DrawnToAfterSnapshot; }
void setFilterQuality(SkFilterQuality filterQuality) { m_surface->setFilterQuality(filterQuality); }
void setIsHidden(bool hidden) { m_surface->setIsHidden(hidden); }
// Called by subclasses of ImageBufferSurface to install a new canvas object.
// Virtual for mocking
virtual void resetCanvas(SkCanvas*) const;
SkCanvas* canvas() const;
void disableDeferral(DisableDeferralReason) const;
// Called at the end of a task that rendered a whole frame
void finalizeFrame(const FloatRect &dirtyRect);
void didFinalizeFrame();
bool isDirty();
bool writePixels(const SkImageInfo&, const void* pixels, size_t rowBytes, int x, int y);
void willOverwriteCanvas() { m_surface->willOverwriteCanvas(); }
bool getImageData(Multiply, const IntRect&, WTF::ArrayBufferContents&) const;
void putByteArray(Multiply, const unsigned char* source, const IntSize& sourceSize, const IntRect& sourceRect, const IntPoint& destPoint);
AffineTransform baseTransform() const { return AffineTransform(); }
WebLayer* platformLayer() const;
// FIXME: current implementations of this method have the restriction that they only work
// with textures that are RGB or RGBA format, UNSIGNED_BYTE type and level 0, as specified in
// Extensions3D::canUseCopyTextureCHROMIUM().
// Destroys the TEXTURE_2D binding for the active texture unit of the passed context
bool copyToPlatformTexture(WebGraphicsContext3D*, Platform3DObject, GLenum, GLenum, GLint, bool, bool);
bool copyRenderingResultsFromDrawingBuffer(DrawingBuffer*, SourceDrawingBuffer);
void flush(FlushReason); // process deferred draw commands immediately
void flushGpu(FlushReason); // Like flush(), but flushes all the way down to the Gpu context if the surface is accelerated
void notifySurfaceInvalid();
PassRefPtr<SkImage> newSkImageSnapshot(AccelerationHint, SnapshotReason) const;
PassRefPtr<Image> newImageSnapshot(AccelerationHint = PreferNoAcceleration, SnapshotReason = SnapshotReasonUnknown) const;
void draw(GraphicsContext&, const FloatRect&, const FloatRect*, SkXfermode::Mode);
void updateGPUMemoryUsage() const;
static intptr_t getGlobalGPUMemoryUsage() { return s_globalGPUMemoryUsage; }
intptr_t getGPUMemoryUsage() { return m_gpuMemoryUsage; }
protected:
ImageBuffer(PassOwnPtr<ImageBufferSurface>);
private:
enum SnapshotState {
InitialSnapshotState,
DidAcquireSnapshot,
DrawnToAfterSnapshot,
};
mutable SnapshotState m_snapshotState;
OwnPtr<ImageBufferSurface> m_surface;
ImageBufferClient* m_client;
mutable intptr_t m_gpuMemoryUsage;
static intptr_t s_globalGPUMemoryUsage;
};
struct ImageDataBuffer {
STACK_ALLOCATED();
ImageDataBuffer(const IntSize& size, const unsigned char* data) : m_data(data), m_size(size) { }
String PLATFORM_EXPORT toDataURL(const String& mimeType, const double& quality) const;
bool PLATFORM_EXPORT encodeImage(const String& mimeType, const double& quality, Vector<unsigned char>* encodedImage) const;
const unsigned char* pixels() const { return m_data; }
int height() const { return m_size.height(); }
int width() const { return m_size.width(); }
const unsigned char* m_data;
const IntSize m_size;
};
} // namespace blink
#endif // ImageBuffer_h
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