1 /* 2 * Copyright (C) 2008 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef CSSGradientValue_h 27 #define CSSGradientValue_h 28 29 #include "CSSImageGeneratorValue.h" 30 #include "CSSPrimitiveValue.h" 31 #include <wtf/RefPtr.h> 32 #include <wtf/Vector.h> 33 34 namespace WebCore { 35 36 class FloatPoint; 37 class Gradient; 38 39 enum CSSGradientType { CSSLinearGradient, CSSRadialGradient }; 40 41 struct CSSGradientColorStop { CSSGradientColorStopCSSGradientColorStop42 CSSGradientColorStop() 43 : m_stop(0) 44 { 45 } 46 47 float m_stop; 48 RefPtr<CSSPrimitiveValue> m_color; 49 }; 50 51 class CSSGradientValue : public CSSImageGeneratorValue { 52 public: create()53 static PassRefPtr<CSSGradientValue> create() 54 { 55 return adoptRef(new CSSGradientValue); 56 } 57 58 virtual String cssText() const; 59 60 virtual Image* image(RenderObject*, const IntSize&); 61 type()62 CSSGradientType type() const { return m_type; } setType(CSSGradientType type)63 void setType(CSSGradientType type) { m_type = type; } 64 setFirstX(PassRefPtr<CSSPrimitiveValue> val)65 void setFirstX(PassRefPtr<CSSPrimitiveValue> val) { m_firstX = val; } setFirstY(PassRefPtr<CSSPrimitiveValue> val)66 void setFirstY(PassRefPtr<CSSPrimitiveValue> val) { m_firstY = val; } setSecondX(PassRefPtr<CSSPrimitiveValue> val)67 void setSecondX(PassRefPtr<CSSPrimitiveValue> val) { m_secondX = val; } setSecondY(PassRefPtr<CSSPrimitiveValue> val)68 void setSecondY(PassRefPtr<CSSPrimitiveValue> val) { m_secondY = val; } 69 setFirstRadius(PassRefPtr<CSSPrimitiveValue> val)70 void setFirstRadius(PassRefPtr<CSSPrimitiveValue> val) { m_firstRadius = val; } setSecondRadius(PassRefPtr<CSSPrimitiveValue> val)71 void setSecondRadius(PassRefPtr<CSSPrimitiveValue> val) { m_secondRadius = val; } 72 addStop(const CSSGradientColorStop & stop)73 void addStop(const CSSGradientColorStop& stop) { m_stops.append(stop); } 74 75 void sortStopsIfNeeded(); 76 77 private: CSSGradientValue()78 CSSGradientValue() 79 : m_type(CSSLinearGradient) 80 , m_stopsSorted(false) 81 { 82 } 83 84 // Create the gradient for a given size. 85 PassRefPtr<Gradient> createGradient(RenderObject*, const IntSize&); 86 87 // Resolve points/radii to front end values. 88 FloatPoint resolvePoint(CSSPrimitiveValue*, CSSPrimitiveValue*, const IntSize&, float zoomFactor); 89 float resolveRadius(CSSPrimitiveValue*, float zoomFactor); 90 91 // Type 92 CSSGradientType m_type; 93 94 // Points 95 RefPtr<CSSPrimitiveValue> m_firstX; 96 RefPtr<CSSPrimitiveValue> m_firstY; 97 98 RefPtr<CSSPrimitiveValue> m_secondX; 99 RefPtr<CSSPrimitiveValue> m_secondY; 100 101 // Radii (for radial gradients only) 102 RefPtr<CSSPrimitiveValue> m_firstRadius; 103 RefPtr<CSSPrimitiveValue> m_secondRadius; 104 105 // Stops 106 Vector<CSSGradientColorStop> m_stops; 107 bool m_stopsSorted; 108 }; 109 110 } // namespace WebCore 111 112 #endif // CSSGradientValue_h 113