2 * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
3 * Copyright (C) 2007, 2008, 2009 Apple Inc. All rights reserved.
4 * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
23 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #include "platform/PlatformExport.h"
32 #include "platform/geometry/FloatRect.h"
33 #include "platform/geometry/IntSize.h"
34 #include "platform/graphics/Canvas2DLayerBridge.h"
35 #include "platform/graphics/ColorSpace.h"
36 #include "platform/graphics/GraphicsTypes.h"
37 #include "platform/graphics/GraphicsTypes3D.h"
38 #include "platform/graphics/ImageBufferSurface.h"
39 #include "platform/transforms/AffineTransform.h"
40 #include "wtf/Forward.h"
41 #include "wtf/OwnPtr.h"
42 #include "wtf/PassOwnPtr.h"
43 #include "wtf/PassRefPtr.h"
44 #include "wtf/Uint8ClampedArray.h"
49 class GraphicsContext;
51 class ImageBufferClient;
54 class WebGraphicsContext3D;
61 enum BackingStoreCopy {
62 CopyBackingStore, // Guarantee subsequent draws don't affect the copy.
63 DontCopyBackingStore // Subsequent draws may affect the copy.
71 class PLATFORM_EXPORT ImageBuffer {
72 WTF_MAKE_NONCOPYABLE(ImageBuffer); WTF_MAKE_FAST_ALLOCATED;
74 static PassOwnPtr<ImageBuffer> create(const IntSize&, OpacityMode = NonOpaque);
75 static PassOwnPtr<ImageBuffer> create(PassOwnPtr<ImageBufferSurface>);
79 void setClient(ImageBufferClient* client) { m_client = client; }
81 const IntSize& size() const { return m_surface->size(); }
82 bool isAccelerated() const { return m_surface->isAccelerated(); }
83 bool isSurfaceValid() const;
84 bool restoreSurface() const;
86 void setIsHidden(bool hidden) { m_surface->setIsHidden(hidden); }
88 void willDrawVideo() { m_surface->willDrawVideo(); }
90 GraphicsContext* context() const;
92 // Called at the end of a task that rendered a whole frame
93 void finalizeFrame(const FloatRect &dirtyRect);
94 void didFinalizeFrame();
98 const SkBitmap& bitmap() const;
100 PassRefPtr<Image> copyImage(BackingStoreCopy = CopyBackingStore, ScaleBehavior = Scaled) const;
101 // Give hints on the faster copyImage Mode, return DontCopyBackingStore if it supports the DontCopyBackingStore behavior
102 // or return CopyBackingStore if it doesn't.
103 static BackingStoreCopy fastCopyImageMode();
105 PassRefPtr<Uint8ClampedArray> getImageData(Multiply, const IntRect&) const;
107 void putByteArray(Multiply, Uint8ClampedArray*, const IntSize& sourceSize, const IntRect& sourceRect, const IntPoint& destPoint);
109 String toDataURL(const String& mimeType, const double* quality = 0) const;
110 AffineTransform baseTransform() const { return AffineTransform(); }
111 void transformColorSpace(ColorSpace srcColorSpace, ColorSpace dstColorSpace);
112 WebLayer* platformLayer() const;
114 // FIXME: current implementations of this method have the restriction that they only work
115 // with textures that are RGB or RGBA format, UNSIGNED_BYTE type and level 0, as specified in
116 // Extensions3D::canUseCopyTextureCHROMIUM().
117 // Destroys the TEXTURE_2D binding for the active texture unit of the passed context
118 bool copyToPlatformTexture(WebGraphicsContext3D*, Platform3DObject, GLenum, GLenum, GLint, bool, bool);
120 Platform3DObject getBackingTexture();
121 void didModifyBackingTexture();
123 bool copyRenderingResultsFromDrawingBuffer(DrawingBuffer*, bool fromFrontBuffer = false);
127 void notifySurfaceInvalid();
129 PassRefPtr<SkImage> newImageSnapshot() const;
132 ImageBuffer(PassOwnPtr<ImageBufferSurface>);
134 void draw(GraphicsContext*, const FloatRect&, const FloatRect* = 0, CompositeOperator = CompositeSourceOver, WebBlendMode = WebBlendModeNormal);
135 void drawPattern(GraphicsContext*, const FloatRect&, const FloatSize&, const FloatPoint&, CompositeOperator, const FloatRect&, WebBlendMode, const IntSize& repeatSpacing = IntSize());
136 static PassRefPtr<SkColorFilter> createColorSpaceFilter(ColorSpace srcColorSpace, ColorSpace dstColorSpace);
138 friend class GraphicsContext;
139 friend class GeneratedImage;
140 friend class CrossfadeGeneratedImage;
141 friend class GradientGeneratedImage;
142 friend class SkiaImageFilterBuilder;
144 OwnPtr<ImageBufferSurface> m_surface;
145 OwnPtr<GraphicsContext> m_context;
146 ImageBufferClient* m_client;
149 struct ImageDataBuffer {
150 ImageDataBuffer(const IntSize& size, PassRefPtr<Uint8ClampedArray> data) : m_size(size), m_data(data) { }
151 IntSize size() const { return m_size; }
152 unsigned char* data() const { return m_data->data(); }
155 RefPtr<Uint8ClampedArray> m_data;
158 String PLATFORM_EXPORT ImageDataToDataURL(const ImageDataBuffer&, const String& mimeType, const double* quality);
162 #endif // ImageBuffer_h