1 /* 2 * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved. 3 * Copyright (C) 2007 Alp Toker <alp@atoker.com> 4 * Copyright (C) 2008 Torch Mobile, Inc. 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 Gradient_h 29 #define Gradient_h 30 31 #include "FloatPoint.h" 32 #include "Generator.h" 33 #include "GraphicsTypes.h" 34 #include "TransformationMatrix.h" 35 #include <wtf/PassRefPtr.h> 36 #include <wtf/Vector.h> 37 38 #if PLATFORM(CG) 39 typedef struct CGShading* CGShadingRef; 40 typedef CGShadingRef PlatformGradient; 41 #elif PLATFORM(QT) 42 QT_BEGIN_NAMESPACE 43 class QGradient; 44 QT_END_NAMESPACE 45 typedef QGradient* PlatformGradient; 46 #elif PLATFORM(CAIRO) 47 typedef struct _cairo_pattern cairo_pattern_t; 48 typedef cairo_pattern_t* PlatformGradient; 49 #elif PLATFORM(ANDROID) && PLATFORM(SGL) 50 #include "SkShader.h" 51 typedef class PlatformGradientRec* PlatformGradient; 52 #elif PLATFORM(SKIA) 53 class SkShader; 54 typedef class SkShader* PlatformGradient; 55 typedef class SkShader* PlatformPattern; 56 #else 57 typedef void* PlatformGradient; 58 #endif 59 60 namespace WebCore { 61 62 class Color; 63 64 class Gradient : public Generator { 65 public: create(const FloatPoint & p0,const FloatPoint & p1)66 static PassRefPtr<Gradient> create(const FloatPoint& p0, const FloatPoint& p1) 67 { 68 return adoptRef(new Gradient(p0, p1)); 69 } create(const FloatPoint & p0,float r0,const FloatPoint & p1,float r1)70 static PassRefPtr<Gradient> create(const FloatPoint& p0, float r0, const FloatPoint& p1, float r1) 71 { 72 return adoptRef(new Gradient(p0, r0, p1, r1)); 73 } 74 virtual ~Gradient(); 75 76 void addColorStop(float, const Color&); 77 78 void getColor(float value, float* r, float* g, float* b, float* a) const; 79 80 #if PLATFORM(WINCE) && !PLATFORM(QT) p0()81 const FloatPoint& p0() const { return m_p0; } p1()82 const FloatPoint& p1() const { return m_p1; } r0()83 float r0() const { return m_r0; } r1()84 float r1() const { return m_r1; } isRadial()85 bool isRadial() const { return m_radial; } 86 struct ColorStop; 87 const Vector<ColorStop>& getStops() const; 88 #else 89 90 #if PLATFORM(ANDROID) && PLATFORM(SGL) 91 SkShader* getShader(SkShader::TileMode); 92 #endif 93 PlatformGradient platformGradient(); 94 #endif 95 96 struct ColorStop { 97 float stop; 98 float red; 99 float green; 100 float blue; 101 float alpha; 102 ColorStopColorStop103 ColorStop() : stop(0), red(0), green(0), blue(0), alpha(0) { } ColorStopColorStop104 ColorStop(float s, float r, float g, float b, float a) : stop(s), red(r), green(g), blue(b), alpha(a) { } 105 }; 106 setStopsSorted(bool s)107 void setStopsSorted(bool s) { m_stopsSorted = s; } 108 109 void setSpreadMethod(GradientSpreadMethod); spreadMethod()110 GradientSpreadMethod spreadMethod() { return m_spreadMethod; } 111 void setGradientSpaceTransform(const TransformationMatrix& gradientSpaceTransformation); 112 // Qt and CG transform the gradient at draw time gradientSpaceTransform()113 TransformationMatrix gradientSpaceTransform() { return m_gradientSpaceTransformation; } 114 115 virtual void fill(GraphicsContext*, const FloatRect&); 116 void setPlatformGradientSpaceTransform(const TransformationMatrix& gradientSpaceTransformation); 117 118 private: 119 Gradient(const FloatPoint& p0, const FloatPoint& p1); 120 Gradient(const FloatPoint& p0, float r0, const FloatPoint& p1, float r1); 121 platformInit()122 void platformInit() { m_gradient = 0; } 123 void platformDestroy(); 124 125 int findStop(float value) const; 126 127 bool m_radial; 128 FloatPoint m_p0; 129 FloatPoint m_p1; 130 float m_r0; 131 float m_r1; 132 mutable Vector<ColorStop> m_stops; 133 mutable bool m_stopsSorted; 134 mutable int m_lastStop; 135 GradientSpreadMethod m_spreadMethod; 136 TransformationMatrix m_gradientSpaceTransformation; 137 138 PlatformGradient m_gradient; 139 }; 140 141 } //namespace 142 143 #endif 144