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 "core/platform/graphics/ColorSpace.h" 32 #include "core/platform/graphics/FloatRect.h" 33 #include "core/platform/graphics/GraphicsContext.h" 34 #include "core/platform/graphics/GraphicsTypes.h" 35 #include "core/platform/graphics/GraphicsTypes3D.h" 36 #include "core/platform/graphics/IntSize.h" 37 #include "core/platform/graphics/transforms/AffineTransform.h" 38 #include "wtf/Forward.h" 39 #include "wtf/OwnPtr.h" 40 #include "wtf/PassOwnPtr.h" 41 #include "wtf/PassRefPtr.h" 42 #include "wtf/Uint8ClampedArray.h" 43 #include "wtf/Vector.h" 44 45 class SkCanvas; 46 47 namespace WebKit { class WebLayer; } 48 49 namespace WebCore { 50 51 class Canvas2DLayerBridge; 52 class Image; 53 class ImageData; 54 class IntPoint; 55 class IntRect; 56 class GraphicsContext3D; 57 58 enum Multiply { 59 Premultiplied, 60 Unmultiplied 61 }; 62 63 enum RenderingMode { 64 Unaccelerated, 65 UnacceleratedNonPlatformBuffer, // Use plain memory allocation rather than platform API to allocate backing store. 66 Accelerated 67 }; 68 69 enum BackingStoreCopy { 70 CopyBackingStore, // Guarantee subsequent draws don't affect the copy. 71 DontCopyBackingStore // Subsequent draws may affect the copy. 72 }; 73 74 enum ScaleBehavior { 75 Scaled, 76 Unscaled 77 }; 78 79 enum OpacityMode { 80 NonOpaque, 81 Opaque, 82 }; 83 84 class ImageBuffer { 85 WTF_MAKE_NONCOPYABLE(ImageBuffer); WTF_MAKE_FAST_ALLOCATED; 86 public: 87 // Will return a null pointer on allocation failure. 88 static PassOwnPtr<ImageBuffer> create(const IntSize& size, float resolutionScale = 1, RenderingMode renderingMode = Unaccelerated, OpacityMode opacityMode = NonOpaque) 89 { 90 bool success = false; 91 OwnPtr<ImageBuffer> buf = adoptPtr(new ImageBuffer(size, resolutionScale, renderingMode, opacityMode, success)); 92 if (!success) 93 return nullptr; 94 return buf.release(); 95 } 96 97 static PassOwnPtr<ImageBuffer> createCompatibleBuffer(const IntSize&, float resolutionScale, const GraphicsContext*, bool hasAlpha); 98 99 ~ImageBuffer(); 100 101 // The actual resolution of the backing store 102 const IntSize& internalSize() const { return m_size; } 103 const IntSize& logicalSize() const { return m_logicalSize; } 104 105 GraphicsContext* context() const; 106 107 PassRefPtr<Image> copyImage(BackingStoreCopy = CopyBackingStore, ScaleBehavior = Scaled) const; 108 // Give hints on the faster copyImage Mode, return DontCopyBackingStore if it supports the DontCopyBackingStore behavior 109 // or return CopyBackingStore if it doesn't. 110 static BackingStoreCopy fastCopyImageMode(); 111 112 enum CoordinateSystem { LogicalCoordinateSystem, BackingStoreCoordinateSystem }; 113 114 PassRefPtr<Uint8ClampedArray> getUnmultipliedImageData(const IntRect&, CoordinateSystem = LogicalCoordinateSystem) const; 115 PassRefPtr<Uint8ClampedArray> getPremultipliedImageData(const IntRect&, CoordinateSystem = LogicalCoordinateSystem) const; 116 117 void putByteArray(Multiply multiplied, Uint8ClampedArray*, const IntSize& sourceSize, const IntRect& sourceRect, const IntPoint& destPoint, CoordinateSystem = LogicalCoordinateSystem); 118 119 void convertToLuminanceMask(); 120 121 String toDataURL(const String& mimeType, const double* quality = 0, CoordinateSystem = LogicalCoordinateSystem) const; 122 AffineTransform baseTransform() const { return AffineTransform(); } 123 void transformColorSpace(ColorSpace srcColorSpace, ColorSpace dstColorSpace); 124 static const Vector<uint8_t>& getLinearRgbLUT(); 125 static const Vector<uint8_t>& getDeviceRgbLUT(); 126 WebKit::WebLayer* platformLayer() const; 127 128 // FIXME: current implementations of this method have the restriction that they only work 129 // with textures that are RGB or RGBA format, UNSIGNED_BYTE type and level 0, as specified in 130 // Extensions3D::canUseCopyTextureCHROMIUM(). 131 bool copyToPlatformTexture(GraphicsContext3D&, Platform3DObject, GC3Denum, GC3Denum, GC3Dint, bool, bool); 132 133 private: 134 bool isValid() const; 135 136 void draw(GraphicsContext*, const FloatRect&, const FloatRect& = FloatRect(0, 0, -1, -1), CompositeOperator = CompositeSourceOver, BlendMode = BlendModeNormal, bool useLowQualityScale = false); 137 void drawPattern(GraphicsContext*, const FloatRect&, const FloatSize&, const FloatPoint&, CompositeOperator, const FloatRect&, BlendMode); 138 139 friend class GraphicsContext; 140 friend class GeneratedImage; 141 friend class CrossfadeGeneratedImage; 142 friend class GeneratorGeneratedImage; 143 144 IntSize m_size; 145 IntSize m_logicalSize; 146 float m_resolutionScale; 147 OwnPtr<SkCanvas> m_canvas; 148 OwnPtr<GraphicsContext> m_context; 149 OwnPtr<Canvas2DLayerBridge> m_layerBridge; 150 151 // This constructor will place its success into the given out-variable 152 // so that create() knows when it should return failure. 153 ImageBuffer(const IntSize&, float resolutionScale, RenderingMode, OpacityMode, bool& success); 154 ImageBuffer(const IntSize&, float resolutionScale, const GraphicsContext*, bool hasAlpha, bool& success); 155 }; 156 157 String ImageDataToDataURL(const ImageData&, const String& mimeType, const double* quality); 158 159 } // namespace WebCore 160 161 #endif // ImageBuffer_h 162
