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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/ColorSpace.h"
#include "platform/graphics/GraphicsTypes.h"
#include "platform/graphics/GraphicsTypes3D.h"
#include "platform/graphics/ImageBufferSurface.h"
#include "platform/graphics/paint/DisplayItemList.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"
namespace blink {
class DrawingBuffer;
class GraphicsContext;
class Image;
class ImageBufferClient;
class IntPoint;
class IntRect;
class WebGraphicsContext3D;
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 PLATFORM_EXPORT ImageBuffer {
WTF_MAKE_NONCOPYABLE(ImageBuffer); WTF_MAKE_FAST_ALLOCATED;
public:
static PassOwnPtr<ImageBuffer> create(const IntSize&, OpacityMode = NonOpaque);
static PassOwnPtr<ImageBuffer> create(PassOwnPtr<ImageBufferSurface>);
~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(); }
bool isSurfaceValid() const;
bool restoreSurface() const;
bool needsClipTracking() const { return m_surface->needsClipTracking(); }
void setFilterLevel(SkPaint::FilterLevel filterLevel) { m_surface->setFilterLevel(filterLevel); }
void setIsHidden(bool hidden) { m_surface->setIsHidden(hidden); }
// Called by subclasses of ImageBufferSurface to install a new canvas object
void resetCanvas(SkCanvas*);
void willDrawVideo() { m_surface->willDrawVideo(); }
GraphicsContext* context() const;
// Called at the end of a task that rendered a whole frame
void finalizeFrame(const FloatRect &dirtyRect);
void didFinalizeFrame();
bool isDirty();
const SkBitmap& bitmap() const;
void willAccessPixels() { m_surface->willAccessPixels(); }
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();
PassRefPtr<Uint8ClampedArray> getImageData(Multiply, const IntRect&) const;
void putByteArray(Multiply, Uint8ClampedArray*, const IntSize& sourceSize, const IntRect& sourceRect, const IntPoint& destPoint);
String toDataURL(const String& mimeType, const double* quality = 0) const;
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);
Platform3DObject getBackingTexture();
void didModifyBackingTexture();
bool copyRenderingResultsFromDrawingBuffer(DrawingBuffer*, SourceDrawingBuffer);
void flush();
void notifySurfaceInvalid();
PassRefPtr<SkImage> newImageSnapshot() const;
DisplayItemClient displayItemClient() const { return static_cast<DisplayItemClientInternalVoid*>((void*)this); }
private:
ImageBuffer(PassOwnPtr<ImageBufferSurface>);
void draw(GraphicsContext*, const FloatRect&, const FloatRect* = 0, CompositeOperator = CompositeSourceOver, WebBlendMode = WebBlendModeNormal);
void drawPattern(GraphicsContext*, const FloatRect&, const FloatSize&, const FloatPoint&, CompositeOperator, const FloatRect&, WebBlendMode, const IntSize& repeatSpacing = IntSize());
static PassRefPtr<SkColorFilter> createColorSpaceFilter(ColorSpace srcColorSpace, ColorSpace dstColorSpace);
friend class GraphicsContext;
friend class GeneratedImage;
friend class CrossfadeGeneratedImage;
friend class GradientGeneratedImage;
friend class SkiaImageFilterBuilder;
OwnPtr<ImageBufferSurface> m_surface;
OwnPtr<GraphicsContext> m_context;
ImageBufferClient* m_client;
};
struct ImageDataBuffer {
ImageDataBuffer(const IntSize& size, PassRefPtr<Uint8ClampedArray> data) : m_size(size), m_data(data) { }
IntSize size() const { return m_size; }
unsigned char* data() const { return m_data->data(); }
IntSize m_size;
RefPtr<Uint8ClampedArray> m_data;
};
String PLATFORM_EXPORT ImageDataToDataURL(const ImageDataBuffer&, const String& mimeType, const double* quality);
} // namespace blink
#endif // ImageBuffer_h
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