1 /* 2 * Copyright (C) 2006 Nikolas Zimmermann <zimmermann (at) 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. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 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. 14 * 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. 26 */ 27 28 #ifndef ImageBuffer_h 29 #define ImageBuffer_h 30 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" 45 #include "wtf/Vector.h" 46 47 class SkCanvas; 48 49 namespace blink { 50 class WebGraphicsContext3D; 51 } 52 53 namespace WebCore { 54 55 class DrawingBuffer; 56 class GraphicsContext; 57 class Image; 58 class ImageBufferClient; 59 class IntPoint; 60 class IntRect; 61 62 enum Multiply { 63 Premultiplied, 64 Unmultiplied 65 }; 66 67 enum BackingStoreCopy { 68 CopyBackingStore, // Guarantee subsequent draws don't affect the copy. 69 DontCopyBackingStore // Subsequent draws may affect the copy. 70 }; 71 72 enum ScaleBehavior { 73 Scaled, 74 Unscaled 75 }; 76 77 class PLATFORM_EXPORT ImageBuffer { 78 WTF_MAKE_NONCOPYABLE(ImageBuffer); WTF_MAKE_FAST_ALLOCATED; 79 public: 80 static PassOwnPtr<ImageBuffer> create(const IntSize&, OpacityMode = NonOpaque); 81 static PassOwnPtr<ImageBuffer> create(PassOwnPtr<ImageBufferSurface>); 82 83 ~ImageBuffer(); 84 85 void setClient(ImageBufferClient* client) { m_client = client; } 86 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; 91 92 void setIsHidden(bool hidden) { m_surface->setIsHidden(hidden); } 93 94 GraphicsContext* context() const; 95 96 const SkBitmap& bitmap() const; 97 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(); 102 103 PassRefPtr<Uint8ClampedArray> getUnmultipliedImageData(const IntRect&) const; 104 PassRefPtr<Uint8ClampedArray> getPremultipliedImageData(const IntRect&) const; 105 106 void putByteArray(Multiply multiplied, Uint8ClampedArray*, const IntSize& sourceSize, const IntRect& sourceRect, const IntPoint& destPoint); 107 108 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; 112 113 // 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); 118 119 Platform3DObject getBackingTexture(); 120 121 bool copyRenderingResultsFromDrawingBuffer(DrawingBuffer*, bool fromFrontBuffer = false); 122 123 void flush(); 124 125 void notifySurfaceInvalid(); 126 127 private: 128 ImageBuffer(PassOwnPtr<ImageBufferSurface>); 129 130 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); 133 134 friend class GraphicsContext; 135 friend class GeneratedImage; 136 friend class CrossfadeGeneratedImage; 137 friend class GradientGeneratedImage; 138 friend class SkiaImageFilterBuilder; 139 140 OwnPtr<ImageBufferSurface> m_surface; 141 OwnPtr<GraphicsContext> m_context; 142 ImageBufferClient* m_client; 143 }; 144 145 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(); } 149 150 IntSize m_size; 151 RefPtr<Uint8ClampedArray> m_data; 152 }; 153 154 String PLATFORM_EXPORT ImageDataToDataURL(const ImageDataBuffer&, const String& mimeType, const double* quality); 155 156 } // namespace WebCore 157 158 #endif // ImageBuffer_h 159
