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.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
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
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25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #include "AffineTransform.h"
32 #include "FloatPoint.h"
33 #include "Generator.h"
34 #include "GraphicsTypes.h"
35 #include <wtf/PassRefPtr.h>
36 #include <wtf/Vector.h>
39 #include <CoreGraphics/CoreGraphics.h>
44 #define USE_CG_SHADING defined(BUILDING_ON_TIGER) || defined(BUILDING_ON_LEOPARD)
47 typedef struct CGShading* CGShadingRef;
48 typedef CGShadingRef PlatformGradient;
50 typedef struct CGGradient* CGGradientRef;
51 typedef CGGradientRef PlatformGradient;
58 typedef QGradient* PlatformGradient;
60 typedef struct _cairo_pattern cairo_pattern_t;
61 typedef cairo_pattern_t* PlatformGradient;
64 typedef class SkShader* PlatformGradient;
65 typedef class SkShader* PlatformPattern;
68 typedef BGradient* PlatformGradient;
70 typedef void* PlatformGradient;
77 class Gradient : public Generator {
79 static PassRefPtr<Gradient> create(const FloatPoint& p0, const FloatPoint& p1)
81 return adoptRef(new Gradient(p0, p1));
83 static PassRefPtr<Gradient> create(const FloatPoint& p0, float r0, const FloatPoint& p1, float r1, float aspectRatio = 1)
85 return adoptRef(new Gradient(p0, r0, p1, r1, aspectRatio));
90 void addColorStop(const ColorStop&);
91 void addColorStop(float, const Color&);
93 void getColor(float value, float* r, float* g, float* b, float* a) const;
94 bool hasAlpha() const;
96 bool isRadial() const { return m_radial; }
97 bool isZeroSize() const { return m_p0.x() == m_p1.x() && m_p0.y() == m_p1.y() && (!m_radial || m_r0 == m_r1); }
99 const FloatPoint& p0() const { return m_p0; }
100 const FloatPoint& p1() const { return m_p1; }
102 void setP0(const FloatPoint& p) { m_p0 = p; }
103 void setP1(const FloatPoint& p) { m_p1 = p; }
105 float startRadius() const { return m_r0; }
106 float endRadius() const { return m_r1; }
108 void setStartRadius(float r) { m_r0 = r; }
109 void setEndRadius(float r) { m_r1 = r; }
111 float aspectRatio() const { return m_aspectRatio; }
113 #if OS(WINCE) && !PLATFORM(QT)
114 const Vector<ColorStop, 2>& getStops() const;
116 PlatformGradient platformGradient();
125 ColorStop() : stop(0), red(0), green(0), blue(0), alpha(0) { }
126 ColorStop(float s, float r, float g, float b, float a) : stop(s), red(r), green(g), blue(b), alpha(a) { }
129 void setStopsSorted(bool s) { m_stopsSorted = s; }
131 void setSpreadMethod(GradientSpreadMethod);
132 GradientSpreadMethod spreadMethod() { return m_spreadMethod; }
133 void setGradientSpaceTransform(const AffineTransform& gradientSpaceTransformation);
134 // Qt and CG transform the gradient at draw time
135 AffineTransform gradientSpaceTransform() { return m_gradientSpaceTransformation; }
137 virtual void fill(GraphicsContext*, const FloatRect&);
138 virtual void adjustParametersForTiledDrawing(IntSize& size, FloatRect& srcRect);
140 void setPlatformGradientSpaceTransform(const AffineTransform& gradientSpaceTransformation);
143 void paint(CGContextRef);
144 void paint(GraphicsContext*);
147 Gradient(const FloatPoint& p0, const FloatPoint& p1);
148 Gradient(const FloatPoint& p0, float r0, const FloatPoint& p1, float r1, float aspectRatio);
150 void platformInit() { m_gradient = 0; }
151 void platformDestroy();
153 int findStop(float value) const;
154 void sortStopsIfNecessary();
161 float m_aspectRatio; // For elliptical gradient, width / height.
162 mutable Vector<ColorStop, 2> m_stops;
163 mutable bool m_stopsSorted;
164 mutable int m_lastStop;
165 GradientSpreadMethod m_spreadMethod;
166 AffineTransform m_gradientSpaceTransformation;
168 PlatformGradient m_gradient;