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/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" 47 48 class SkCanvas; 49 50 namespace WebCore { 51 52 class DrawingBuffer; 53 class GraphicsContext3D; 54 class Image; 55 class IntPoint; 56 class IntRect; 57 58 enum Multiply { 59 Premultiplied, 60 Unmultiplied 61 }; 62 63 enum BackingStoreCopy { 64 CopyBackingStore, // Guarantee subsequent draws don't affect the copy. 65 DontCopyBackingStore // Subsequent draws may affect the copy. 66 }; 67 68 enum ScaleBehavior { 69 Scaled, 70 Unscaled 71 }; 72 73 class PLATFORM_EXPORT ImageBuffer { 74 WTF_MAKE_NONCOPYABLE(ImageBuffer); WTF_MAKE_FAST_ALLOCATED; 75 public: 76 static PassOwnPtr<ImageBuffer> create(const IntSize&, OpacityMode = NonOpaque); 77 static PassOwnPtr<ImageBuffer> create(PassOwnPtr<ImageBufferSurface>); 78 79 ~ImageBuffer(); 80 81 const IntSize& size() const { return m_surface->size(); } 82 bool isAccelerated() const { return m_surface->isAccelerated(); } 83 84 GraphicsContext* context() const; 85 86 const SkBitmap& bitmap() const; 87 88 PassRefPtr<Image> copyImage(BackingStoreCopy = CopyBackingStore, ScaleBehavior = Scaled) const; 89 // Give hints on the faster copyImage Mode, return DontCopyBackingStore if it supports the DontCopyBackingStore behavior 90 // or return CopyBackingStore if it doesn't. 91 static BackingStoreCopy fastCopyImageMode(); 92 93 PassRefPtr<Uint8ClampedArray> getUnmultipliedImageData(const IntRect&) const; 94 PassRefPtr<Uint8ClampedArray> getPremultipliedImageData(const IntRect&) const; 95 96 void putByteArray(Multiply multiplied, Uint8ClampedArray*, const IntSize& sourceSize, const IntRect& sourceRect, const IntPoint& destPoint); 97 98 String toDataURL(const String& mimeType, const double* quality = 0) const; 99 AffineTransform baseTransform() const { return AffineTransform(); } 100 void transformColorSpace(ColorSpace srcColorSpace, ColorSpace dstColorSpace); 101 blink::WebLayer* platformLayer() const; 102 103 // FIXME: current implementations of this method have the restriction that they only work 104 // with textures that are RGB or RGBA format, UNSIGNED_BYTE type and level 0, as specified in 105 // Extensions3D::canUseCopyTextureCHROMIUM(). 106 bool copyToPlatformTexture(GraphicsContext3D&, Platform3DObject, GC3Denum, GC3Denum, GC3Dint, bool, bool); 107 108 Platform3DObject getBackingTexture(); 109 bool copyRenderingResultsFromDrawingBuffer(DrawingBuffer*); 110 111 void flush(); 112 113 private: 114 ImageBuffer(PassOwnPtr<ImageBufferSurface>); 115 bool isValid() const; 116 117 void draw(GraphicsContext*, const FloatRect&, const FloatRect& = FloatRect(0, 0, -1, -1), CompositeOperator = CompositeSourceOver, blink::WebBlendMode = blink::WebBlendModeNormal, bool useLowQualityScale = false); 118 void drawPattern(GraphicsContext*, const FloatRect&, const FloatSize&, const FloatPoint&, CompositeOperator, const FloatRect&, blink::WebBlendMode, const IntSize& repeatSpacing = IntSize()); 119 static PassRefPtr<SkColorFilter> createColorSpaceFilter(ColorSpace srcColorSpace, ColorSpace dstColorSpace); 120 121 friend class GraphicsContext; 122 friend class GeneratedImage; 123 friend class CrossfadeGeneratedImage; 124 friend class GradientGeneratedImage; 125 friend class SkiaImageFilterBuilder; 126 127 OwnPtr<ImageBufferSurface> m_surface; 128 OwnPtr<GraphicsContext> m_context; 129 }; 130 131 struct ImageDataBuffer { 132 ImageDataBuffer(const IntSize& size, PassRefPtr<Uint8ClampedArray> data) : m_size(size), m_data(data) { } 133 IntSize size() const { return m_size; } 134 unsigned char* data() const { return m_data->data(); } 135 136 IntSize m_size; 137 RefPtr<Uint8ClampedArray> m_data; 138 }; 139 140 String PLATFORM_EXPORT ImageDataToDataURL(const ImageDataBuffer&, const String& mimeType, const double* quality); 141 142 } // namespace WebCore 143 144 #endif // ImageBuffer_h 145
