1 /* 2 * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved. 3 * Copyright (C) 2007 Alp Toker <alp@atoker.com> 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef Gradient_h 28 #define Gradient_h 29 30 #include "FloatPoint.h" 31 #include "Generator.h" 32 #include <wtf/PassRefPtr.h> 33 #include <wtf/Vector.h> 34 35 #if PLATFORM(CG) 36 typedef struct CGShading* CGShadingRef; 37 typedef CGShadingRef PlatformGradient; 38 #elif PLATFORM(QT) 39 QT_BEGIN_NAMESPACE 40 class QGradient; 41 QT_END_NAMESPACE 42 typedef QGradient* PlatformGradient; 43 #elif PLATFORM(CAIRO) 44 typedef struct _cairo_pattern cairo_pattern_t; 45 typedef cairo_pattern_t* PlatformGradient; 46 #elif PLATFORM(SGL) 47 #include "SkShader.h" 48 typedef class PlatformGradientRec* PlatformGradient; 49 #elif PLATFORM(SKIA) 50 class SkShader; 51 typedef class SkShader* PlatformGradient; 52 typedef class SkShader* PlatformPattern; 53 #else 54 typedef void* PlatformGradient; 55 #endif 56 57 namespace WebCore { 58 59 class Color; 60 61 class Gradient : public Generator { 62 public: create(const FloatPoint & p0,const FloatPoint & p1)63 static PassRefPtr<Gradient> create(const FloatPoint& p0, const FloatPoint& p1) 64 { 65 return adoptRef(new Gradient(p0, p1)); 66 } create(const FloatPoint & p0,float r0,const FloatPoint & p1,float r1)67 static PassRefPtr<Gradient> create(const FloatPoint& p0, float r0, const FloatPoint& p1, float r1) 68 { 69 return adoptRef(new Gradient(p0, r0, p1, r1)); 70 } 71 virtual ~Gradient(); 72 73 void addColorStop(float, const Color&); 74 75 void getColor(float value, float* r, float* g, float* b, float* a) const; 76 77 #if PLATFORM(SGL) 78 SkShader* getShader(SkShader::TileMode); 79 #else 80 PlatformGradient platformGradient(); 81 #endif 82 83 struct ColorStop { 84 float stop; 85 float red; 86 float green; 87 float blue; 88 float alpha; 89 ColorStopColorStop90 ColorStop() : stop(0), red(0), green(0), blue(0), alpha(0) { } ColorStopColorStop91 ColorStop(float s, float r, float g, float b, float a) : stop(s), red(r), green(g), blue(b), alpha(a) { } 92 }; 93 setStopsSorted(bool s)94 void setStopsSorted(bool s) { m_stopsSorted = s; } 95 96 virtual void fill(GraphicsContext*, const FloatRect&); 97 98 private: 99 Gradient(const FloatPoint& p0, const FloatPoint& p1); 100 Gradient(const FloatPoint& p0, float r0, const FloatPoint& p1, float r1); 101 platformInit()102 void platformInit() { m_gradient = 0; } 103 void platformDestroy(); 104 105 int findStop(float value) const; 106 107 bool m_radial; 108 FloatPoint m_p0; 109 FloatPoint m_p1; 110 float m_r0; 111 float m_r1; 112 mutable Vector<ColorStop> m_stops; 113 mutable bool m_stopsSorted; 114 mutable int m_lastStop; 115 116 PlatformGradient m_gradient; 117 }; 118 119 } //namespace 120 121 #endif 122