1 /* 2 * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved. 3 * Copyright (C) 2005 Nokia. All rights reserved. 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 FloatPoint_h 28 #define FloatPoint_h 29 30 #include "platform/geometry/FloatSize.h" 31 #include "platform/geometry/IntPoint.h" 32 #include "wtf/MathExtras.h" 33 #include <algorithm> 34 35 #if OS(MACOSX) 36 typedef struct CGPoint CGPoint; 37 38 #ifdef NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES 39 typedef struct CGPoint NSPoint; 40 #else 41 typedef struct _NSPoint NSPoint; 42 #endif 43 #endif 44 45 struct SkPoint; 46 47 namespace WebCore { 48 49 class AffineTransform; 50 class TransformationMatrix; 51 class IntPoint; 52 class IntSize; 53 class LayoutPoint; 54 class LayoutSize; 55 56 class PLATFORM_EXPORT FloatPoint { 57 public: 58 FloatPoint() : m_x(0), m_y(0) { } 59 FloatPoint(float x, float y) : m_x(x), m_y(y) { } 60 FloatPoint(const IntPoint&); 61 FloatPoint(const LayoutPoint&); 62 explicit FloatPoint(const FloatSize& size) : m_x(size.width()), m_y(size.height()) { } 63 64 static FloatPoint zero() { return FloatPoint(); } 65 66 static FloatPoint narrowPrecision(double x, double y); 67 68 float x() const { return m_x; } 69 float y() const { return m_y; } 70 71 void setX(float x) { m_x = x; } 72 void setY(float y) { m_y = y; } 73 void set(float x, float y) 74 { 75 m_x = x; 76 m_y = y; 77 } 78 void move(float dx, float dy) 79 { 80 m_x += dx; 81 m_y += dy; 82 } 83 void move(const IntSize& a) 84 { 85 m_x += a.width(); 86 m_y += a.height(); 87 } 88 void move(const LayoutSize&); 89 void move(const FloatSize& a) 90 { 91 m_x += a.width(); 92 m_y += a.height(); 93 } 94 void moveBy(const IntPoint& a) 95 { 96 m_x += a.x(); 97 m_y += a.y(); 98 } 99 void moveBy(const LayoutPoint&); 100 void moveBy(const FloatPoint& a) 101 { 102 m_x += a.x(); 103 m_y += a.y(); 104 } 105 void scale(float sx, float sy) 106 { 107 m_x *= sx; 108 m_y *= sy; 109 } 110 111 void normalize(); 112 113 float dot(const FloatPoint& a) const 114 { 115 return m_x * a.x() + m_y * a.y(); 116 } 117 118 float slopeAngleRadians() const; 119 float length() const; 120 float lengthSquared() const 121 { 122 return m_x * m_x + m_y * m_y; 123 } 124 125 FloatPoint expandedTo(const FloatPoint& other) const 126 { 127 return FloatPoint(std::max(m_x, other.m_x), std::max(m_y, other.m_y)); 128 } 129 130 FloatPoint transposedPoint() const 131 { 132 return FloatPoint(m_y, m_x); 133 } 134 135 #if OS(MACOSX) 136 FloatPoint(const CGPoint&); 137 operator CGPoint() const; 138 #if !defined(NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES) 139 FloatPoint(const NSPoint&); 140 operator NSPoint() const; 141 #endif 142 #endif 143 144 operator SkPoint() const; 145 146 // FIXME: These are only used by SVGPoint and should probably move there. 147 // http://crbug.com/302829 148 FloatPoint matrixTransform(const TransformationMatrix&) const; 149 FloatPoint matrixTransform(const AffineTransform&) const; 150 151 private: 152 float m_x, m_y; 153 }; 154 155 156 inline FloatPoint& operator+=(FloatPoint& a, const FloatSize& b) 157 { 158 a.move(b.width(), b.height()); 159 return a; 160 } 161 162 inline FloatPoint& operator+=(FloatPoint& a, const FloatPoint& b) 163 { 164 a.move(b.x(), b.y()); 165 return a; 166 } 167 168 inline FloatPoint& operator-=(FloatPoint& a, const FloatSize& b) 169 { 170 a.move(-b.width(), -b.height()); 171 return a; 172 } 173 174 inline FloatPoint operator+(const FloatPoint& a, const FloatSize& b) 175 { 176 return FloatPoint(a.x() + b.width(), a.y() + b.height()); 177 } 178 179 inline FloatPoint operator+(const FloatPoint& a, const FloatPoint& b) 180 { 181 return FloatPoint(a.x() + b.x(), a.y() + b.y()); 182 } 183 184 inline FloatSize operator-(const FloatPoint& a, const FloatPoint& b) 185 { 186 return FloatSize(a.x() - b.x(), a.y() - b.y()); 187 } 188 189 inline FloatPoint operator-(const FloatPoint& a, const FloatSize& b) 190 { 191 return FloatPoint(a.x() - b.width(), a.y() - b.height()); 192 } 193 194 inline FloatPoint operator-(const FloatPoint& a) 195 { 196 return FloatPoint(-a.x(), -a.y()); 197 } 198 199 inline bool operator==(const FloatPoint& a, const FloatPoint& b) 200 { 201 return a.x() == b.x() && a.y() == b.y(); 202 } 203 204 inline bool operator!=(const FloatPoint& a, const FloatPoint& b) 205 { 206 return a.x() != b.x() || a.y() != b.y(); 207 } 208 209 inline float operator*(const FloatPoint& a, const FloatPoint& b) 210 { 211 // dot product 212 return a.dot(b); 213 } 214 215 inline IntPoint roundedIntPoint(const FloatPoint& p) 216 { 217 return IntPoint(clampToInteger(roundf(p.x())), clampToInteger(roundf(p.y()))); 218 } 219 220 inline IntPoint flooredIntPoint(const FloatPoint& p) 221 { 222 return IntPoint(clampToInteger(floorf(p.x())), clampToInteger(floorf(p.y()))); 223 } 224 225 inline IntPoint ceiledIntPoint(const FloatPoint& p) 226 { 227 return IntPoint(clampToInteger(ceilf(p.x())), clampToInteger(ceilf(p.y()))); 228 } 229 230 inline IntSize flooredIntSize(const FloatPoint& p) 231 { 232 return IntSize(clampToInteger(floorf(p.x())), clampToInteger(floorf(p.y()))); 233 } 234 235 inline FloatSize toFloatSize(const FloatPoint& a) 236 { 237 return FloatSize(a.x(), a.y()); 238 } 239 240 PLATFORM_EXPORT float findSlope(const FloatPoint& p1, const FloatPoint& p2, float& c); 241 242 // Find point where lines through the two pairs of points intersect. Returns false if the lines don't intersect. 243 PLATFORM_EXPORT bool findIntersection(const FloatPoint& p1, const FloatPoint& p2, const FloatPoint& d1, const FloatPoint& d2, FloatPoint& intersection); 244 245 } 246 247 #endif 248
