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/GraphicsContext.h"
37 #include "platform/graphics/GraphicsTypes.h"
38 #include "platform/graphics/GraphicsTypes3D.h"
39 #include "platform/graphics/ImageBufferSurface.h"
40 #include "platform/transforms/AffineTransform.h"
41 #include "wtf/Forward.h"
42 #include "wtf/OwnPtr.h"
43 #include "wtf/PassOwnPtr.h"
44 #include "wtf/PassRefPtr.h"
45 #include "wtf/Uint8ClampedArray.h"
46 #include "wtf/Vector.h"
51 class WebGraphicsContext3D;
58 class ImageBufferClient;
67 enum BackingStoreCopy {
68 CopyBackingStore, // Guarantee subsequent draws don't affect the copy.
69 DontCopyBackingStore // Subsequent draws may affect the copy.
77 class PLATFORM_EXPORT ImageBuffer {
78 WTF_MAKE_NONCOPYABLE(ImageBuffer); WTF_MAKE_FAST_ALLOCATED;
80 static PassOwnPtr<ImageBuffer> create(const IntSize&, OpacityMode = NonOpaque);
81 static PassOwnPtr<ImageBuffer> create(PassOwnPtr<ImageBufferSurface>);
85 void setClient(ImageBufferClient* client) { m_client = client; }
87 const IntSize& size() const { return m_surface->size(); }
88 bool isAccelerated() const { return m_surface->isAccelerated(); }
89 bool isSurfaceValid() const;
90 bool restoreSurface() const;
92 void setIsHidden(bool hidden) { m_surface->setIsHidden(hidden); }
94 GraphicsContext* context() const;
96 const SkBitmap& bitmap() const;
98 PassRefPtr<Image> copyImage(BackingStoreCopy = CopyBackingStore, ScaleBehavior = Scaled) const;
99 // Give hints on the faster copyImage Mode, return DontCopyBackingStore if it supports the DontCopyBackingStore behavior
100 // or return CopyBackingStore if it doesn't.
101 static BackingStoreCopy fastCopyImageMode();
103 PassRefPtr<Uint8ClampedArray> getUnmultipliedImageData(const IntRect&) const;
104 PassRefPtr<Uint8ClampedArray> getPremultipliedImageData(const IntRect&) const;
106 void putByteArray(Multiply multiplied, Uint8ClampedArray*, const IntSize& sourceSize, const IntRect& sourceRect, const IntPoint& destPoint);
108 String toDataURL(const String& mimeType, const double* quality = 0) const;
109 AffineTransform baseTransform() const { return AffineTransform(); }
110 void transformColorSpace(ColorSpace srcColorSpace, ColorSpace dstColorSpace);
111 blink::WebLayer* platformLayer() const;
113 // FIXME: current implementations of this method have the restriction that they only work
114 // with textures that are RGB or RGBA format, UNSIGNED_BYTE type and level 0, as specified in
115 // Extensions3D::canUseCopyTextureCHROMIUM().
116 // Destroys the TEXTURE_2D binding for the active texture unit of the passed context
117 bool copyToPlatformTexture(blink::WebGraphicsContext3D*, Platform3DObject, GLenum, GLenum, GLint, bool, bool);
119 Platform3DObject getBackingTexture();
121 bool copyRenderingResultsFromDrawingBuffer(DrawingBuffer*);
125 void notifySurfaceInvalid();
128 ImageBuffer(PassOwnPtr<ImageBufferSurface>);
130 void draw(GraphicsContext*, const FloatRect&, const FloatRect* = 0, CompositeOperator = CompositeSourceOver);
131 void drawPattern(GraphicsContext*, const FloatRect&, const FloatSize&, const FloatPoint&, CompositeOperator, const FloatRect&, blink::WebBlendMode, const IntSize& repeatSpacing = IntSize());
132 static PassRefPtr<SkColorFilter> createColorSpaceFilter(ColorSpace srcColorSpace, ColorSpace dstColorSpace);
134 friend class GraphicsContext;
135 friend class GeneratedImage;
136 friend class CrossfadeGeneratedImage;
137 friend class GradientGeneratedImage;
138 friend class SkiaImageFilterBuilder;
140 OwnPtr<ImageBufferSurface> m_surface;
141 OwnPtr<GraphicsContext> m_context;
142 ImageBufferClient* m_client;
145 struct ImageDataBuffer {
146 ImageDataBuffer(const IntSize& size, PassRefPtr<Uint8ClampedArray> data) : m_size(size), m_data(data) { }
147 IntSize size() const { return m_size; }
148 unsigned char* data() const { return m_data->data(); }
151 RefPtr<Uint8ClampedArray> m_data;
154 String PLATFORM_EXPORT ImageDataToDataURL(const ImageDataBuffer&, const String& mimeType, const double* quality);
156 } // namespace WebCore
158 #endif // ImageBuffer_h