1 /* 2 * Copyright (C) 2005, 2006 Apple Computer, Inc. All rights reserved. 3 * 2010 Dirk Schulze <krit (at) webkit.org> 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 AffineTransform_h 28 #define AffineTransform_h 29 30 #include "TransformationMatrix.h" 31 32 #include <string.h> // for memcpy 33 #include <wtf/FastAllocBase.h> 34 35 #if PLATFORM(CG) 36 #include <CoreGraphics/CGAffineTransform.h> 37 #elif PLATFORM(CAIRO) 38 #include <cairo.h> 39 #elif PLATFORM(QT) 40 #include <QTransform> 41 #elif PLATFORM(SKIA) 42 #include <SkMatrix.h> 43 #elif PLATFORM(WX) && USE(WXGC) 44 #include <wx/graphics.h> 45 #endif 46 47 namespace WebCore { 48 49 class FloatPoint; 50 class FloatQuad; 51 class FloatRect; 52 class IntPoint; 53 class IntRect; 54 class TransformationMatrix; 55 56 class AffineTransform : public FastAllocBase { 57 public: 58 typedef double Transform[6]; 59 60 AffineTransform(); 61 AffineTransform(double a, double b, double c, double d, double e, double f); 62 63 void setMatrix(double a, double b, double c, double d, double e, double f); 64 65 void map(double x, double y, double& x2, double& y2) const; 66 67 // Rounds the mapped point to the nearest integer value. 68 IntPoint mapPoint(const IntPoint&) const; 69 70 FloatPoint mapPoint(const FloatPoint&) const; 71 72 // Rounds the resulting mapped rectangle out. This is helpful for bounding 73 // box computations but may not be what is wanted in other contexts. 74 IntRect mapRect(const IntRect&) const; 75 76 FloatRect mapRect(const FloatRect&) const; 77 78 bool isIdentity() const; 79 80 double a() const { return m_transform[0]; } 81 void setA(double a) { m_transform[0] = a; } 82 double b() const { return m_transform[1]; } 83 void setB(double b) { m_transform[1] = b; } 84 double c() const { return m_transform[2]; } 85 void setC(double c) { m_transform[2] = c; } 86 double d() const { return m_transform[3]; } 87 void setD(double d) { m_transform[3] = d; } 88 double e() const { return m_transform[4]; } 89 void setE(double e) { m_transform[4] = e; } 90 double f() const { return m_transform[5]; } 91 void setF(double f) { m_transform[5] = f; } 92 93 void makeIdentity(); 94 95 AffineTransform& multiply(const AffineTransform&); 96 AffineTransform& multLeft(const AffineTransform&); 97 AffineTransform& scale(double); 98 AffineTransform& scale(double sx, double sy); 99 AffineTransform& scaleNonUniform(double sx, double sy); 100 AffineTransform& rotate(double d); 101 AffineTransform& rotateFromVector(double x, double y); 102 AffineTransform& translate(double tx, double ty); 103 AffineTransform& translateRight(double tx, double ty); 104 AffineTransform& shear(double sx, double sy); 105 AffineTransform& flipX(); 106 AffineTransform& flipY(); 107 AffineTransform& skew(double angleX, double angleY); 108 AffineTransform& skewX(double angle); 109 AffineTransform& skewY(double angle); 110 111 double det() const; 112 bool isInvertible() const; 113 AffineTransform inverse() const; 114 115 void blend(const AffineTransform& from, double progress); 116 117 TransformationMatrix toTransformationMatrix() const; 118 119 bool isIdentityOrTranslation() const 120 { 121 return m_transform[0] == 1 && m_transform[1] == 0 && m_transform[2] == 0 && m_transform[3] == 1; 122 } 123 124 bool operator== (const AffineTransform& m2) const 125 { 126 return (m_transform[0] == m2.m_transform[0] 127 && m_transform[1] == m2.m_transform[1] 128 && m_transform[2] == m2.m_transform[2] 129 && m_transform[3] == m2.m_transform[3] 130 && m_transform[4] == m2.m_transform[4] 131 && m_transform[5] == m2.m_transform[5]); 132 } 133 134 bool operator!=(const AffineTransform& other) const { return !(*this == other); } 135 136 // *this = *this * t (i.e., a multRight) 137 AffineTransform& operator*=(const AffineTransform& t) 138 { 139 *this = *this * t; 140 return *this; 141 } 142 143 // result = *this * t (i.e., a multRight) 144 AffineTransform operator*(const AffineTransform& t) const 145 { 146 AffineTransform result = t; 147 result.multLeft(*this); 148 return result; 149 } 150 151 #if PLATFORM(CG) 152 operator CGAffineTransform() const; 153 #elif PLATFORM(CAIRO) 154 operator cairo_matrix_t() const; 155 #elif PLATFORM(QT) 156 operator QTransform() const; 157 #elif PLATFORM(SKIA) 158 operator SkMatrix() const; 159 #elif PLATFORM(WX) && USE(WXGC) 160 operator wxGraphicsMatrix() const; 161 #endif 162 163 private: 164 void setMatrix(const Transform m) 165 { 166 if (m && m != m_transform) 167 memcpy(m_transform, m, sizeof(Transform)); 168 } 169 170 Transform m_transform; 171 }; 172 173 AffineTransform makeMapBetweenRects(const FloatRect& source, const FloatRect& dest); 174 175 } 176 177 #endif 178
