1/*
2 * Copyright (C) 2004-2016 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 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 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#pragma once
28
29#include "FloatSize.h"
30#include "IntPoint.h"
31#include <wtf/MathExtras.h>
32
33#if PLATFORM(MAC) && defined __OBJC__
34#import <Foundation/NSGeometry.h>
35#endif
36
37#if USE(CG)
38typedef struct CGPoint CGPoint;
39#endif
40
41#if PLATFORM(MAC)
42#ifdef NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES
43typedef struct CGPoint NSPoint;
44#else
45typedef struct _NSPoint NSPoint;
46#endif
47#endif // PLATFORM(MAC)
48
49#if PLATFORM(WIN)
50struct D2D_POINT_2F;
51typedef D2D_POINT_2F D2D1_POINT_2F;
52#endif
53
54namespace WTF {
55class TextStream;
56}
57
58namespace WebCore {
59
60class AffineTransform;
61class TransformationMatrix;
62class IntPoint;
63class IntSize;
64
65class FloatPoint {
66public:
67 FloatPoint() { }
68 FloatPoint(float x, float y) : m_x(x), m_y(y) { }
69 WEBCORE_EXPORT FloatPoint(const IntPoint&);
70 explicit FloatPoint(const FloatSize& size) : m_x(size.width()), m_y(size.height()) { }
71
72 static FloatPoint zero() { return FloatPoint(); }
73 bool isZero() const { return !m_x && !m_y; }
74
75 WEBCORE_EXPORT static FloatPoint narrowPrecision(double x, double y);
76
77 float x() const { return m_x; }
78 float y() const { return m_y; }
79
80 void setX(float x) { m_x = x; }
81 void setY(float y) { m_y = y; }
82
83 void set(float x, float y)
84 {
85 m_x = x;
86 m_y = y;
87 }
88
89 void move(float dx, float dy)
90 {
91 m_x += dx;
92 m_y += dy;
93 }
94
95 void move(const IntSize& a)
96 {
97 m_x += a.width();
98 m_y += a.height();
99 }
100
101 void move(const FloatSize& a)
102 {
103 m_x += a.width();
104 m_y += a.height();
105 }
106
107 void moveBy(const IntPoint& a)
108 {
109 m_x += a.x();
110 m_y += a.y();
111 }
112
113 void moveBy(const FloatPoint& a)
114 {
115 m_x += a.x();
116 m_y += a.y();
117 }
118
119 void scale(float scale)
120 {
121 m_x *= scale;
122 m_y *= scale;
123 }
124
125 void scale(float scaleX, float scaleY)
126 {
127 m_x *= scaleX;
128 m_y *= scaleY;
129 }
130
131 FloatPoint scaled(float scale) const
132 {
133 return { m_x * scale, m_y * scale };
134 }
135
136 FloatPoint scaled(float scaleX, float scaleY) const
137 {
138 return { m_x * scaleX, m_y * scaleY };
139 }
140
141 WEBCORE_EXPORT void normalize();
142
143 float dot(const FloatPoint& a) const
144 {
145 return m_x * a.x() + m_y * a.y();
146 }
147
148 float slopeAngleRadians() const;
149 float length() const;
150
151 float lengthSquared() const
152 {
153 return m_x * m_x + m_y * m_y;
154 }
155
156 WEBCORE_EXPORT FloatPoint constrainedBetween(const FloatPoint& min, const FloatPoint& max) const;
157
158 FloatPoint shrunkTo(const FloatPoint& other) const
159 {
160 return { std::min(m_x, other.m_x), std::min(m_y, other.m_y) };
161 }
162
163 FloatPoint expandedTo(const FloatPoint& other) const
164 {
165 return { std::max(m_x, other.m_x), std::max(m_y, other.m_y) };
166 }
167
168 FloatPoint transposedPoint() const
169 {
170 return { m_y, m_x };
171 }
172
173#if USE(CG)
174 WEBCORE_EXPORT FloatPoint(const CGPoint&);
175 WEBCORE_EXPORT operator CGPoint() const;
176#endif
177
178#if PLATFORM(MAC) && !defined(NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES)
179 WEBCORE_EXPORT FloatPoint(const NSPoint&);
180 WEBCORE_EXPORT operator NSPoint() const;
181#endif
182
183#if PLATFORM(WIN)
184 WEBCORE_EXPORT FloatPoint(const D2D1_POINT_2F&);
185 WEBCORE_EXPORT operator D2D1_POINT_2F() const;
186#endif
187
188 WEBCORE_EXPORT FloatPoint matrixTransform(const TransformationMatrix&) const;
189 WEBCORE_EXPORT FloatPoint matrixTransform(const AffineTransform&) const;
190
191private:
192 float m_x { 0 };
193 float m_y { 0 };
194};
195
196
197inline FloatPoint& operator+=(FloatPoint& a, const FloatSize& b)
198{
199 a.move(b.width(), b.height());
200 return a;
201}
202
203inline FloatPoint& operator+=(FloatPoint& a, const FloatPoint& b)
204{
205 a.move(b.x(), b.y());
206 return a;
207}
208
209inline FloatPoint& operator-=(FloatPoint& a, const FloatSize& b)
210{
211 a.move(-b.width(), -b.height());
212 return a;
213}
214
215inline FloatPoint operator+(const FloatPoint& a, const FloatSize& b)
216{
217 return FloatPoint(a.x() + b.width(), a.y() + b.height());
218}
219
220inline FloatPoint operator+(const FloatPoint& a, const FloatPoint& b)
221{
222 return FloatPoint(a.x() + b.x(), a.y() + b.y());
223}
224
225inline FloatSize operator-(const FloatPoint& a, const FloatPoint& b)
226{
227 return FloatSize(a.x() - b.x(), a.y() - b.y());
228}
229
230inline FloatPoint operator-(const FloatPoint& a, const FloatSize& b)
231{
232 return FloatPoint(a.x() - b.width(), a.y() - b.height());
233}
234
235inline FloatPoint operator-(const FloatPoint& a)
236{
237 return FloatPoint(-a.x(), -a.y());
238}
239
240inline bool operator==(const FloatPoint& a, const FloatPoint& b)
241{
242 return a.x() == b.x() && a.y() == b.y();
243}
244
245inline bool operator!=(const FloatPoint& a, const FloatPoint& b)
246{
247 return a.x() != b.x() || a.y() != b.y();
248}
249
250inline float operator*(const FloatPoint& a, const FloatPoint& b)
251{
252 // dot product
253 return a.dot(b);
254}
255
256inline IntSize flooredIntSize(const FloatPoint& p)
257{
258 return IntSize(clampToInteger(floorf(p.x())), clampToInteger(floorf(p.y())));
259}
260
261inline IntPoint roundedIntPoint(const FloatPoint& p)
262{
263 return IntPoint(clampToInteger(roundf(p.x())), clampToInteger(roundf(p.y())));
264}
265
266inline IntPoint flooredIntPoint(const FloatPoint& p)
267{
268 return IntPoint(clampToInteger(floorf(p.x())), clampToInteger(floorf(p.y())));
269}
270
271inline IntPoint ceiledIntPoint(const FloatPoint& p)
272{
273 return IntPoint(clampToInteger(ceilf(p.x())), clampToInteger(ceilf(p.y())));
274}
275
276inline FloatPoint floorPointToDevicePixels(const FloatPoint& p, float deviceScaleFactor)
277{
278 return FloatPoint(floorf(p.x() * deviceScaleFactor) / deviceScaleFactor, floorf(p.y() * deviceScaleFactor) / deviceScaleFactor);
279}
280
281inline FloatPoint ceilPointToDevicePixels(const FloatPoint& p, float deviceScaleFactor)
282{
283 return FloatPoint(ceilf(p.x() * deviceScaleFactor) / deviceScaleFactor, ceilf(p.y() * deviceScaleFactor) / deviceScaleFactor);
284}
285
286inline FloatSize toFloatSize(const FloatPoint& a)
287{
288 return FloatSize(a.x(), a.y());
289}
290
291inline FloatPoint toFloatPoint(const FloatSize& a)
292{
293 return FloatPoint(a.width(), a.height());
294}
295
296inline bool areEssentiallyEqual(const FloatPoint& a, const FloatPoint& b)
297{
298 return WTF::areEssentiallyEqual(a.x(), b.x()) && WTF::areEssentiallyEqual(a.y(), b.y());
299}
300
301WEBCORE_EXPORT WTF::TextStream& operator<<(WTF::TextStream&, const FloatPoint&);
302
303}
304
305