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) |
38 | typedef struct CGPoint CGPoint; |
39 | #endif |
40 | |
41 | #if PLATFORM(MAC) |
42 | #ifdef NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES |
43 | typedef struct CGPoint NSPoint; |
44 | #else |
45 | typedef struct _NSPoint NSPoint; |
46 | #endif |
47 | #endif // PLATFORM(MAC) |
48 | |
49 | #if PLATFORM(WIN) |
50 | struct D2D_POINT_2F; |
51 | typedef D2D_POINT_2F D2D1_POINT_2F; |
52 | #endif |
53 | |
54 | namespace WTF { |
55 | class TextStream; |
56 | } |
57 | |
58 | namespace WebCore { |
59 | |
60 | class AffineTransform; |
61 | class TransformationMatrix; |
62 | class IntPoint; |
63 | class IntSize; |
64 | |
65 | class FloatPoint { |
66 | public: |
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 | |
191 | private: |
192 | float m_x { 0 }; |
193 | float m_y { 0 }; |
194 | }; |
195 | |
196 | |
197 | inline FloatPoint& operator+=(FloatPoint& a, const FloatSize& b) |
198 | { |
199 | a.move(b.width(), b.height()); |
200 | return a; |
201 | } |
202 | |
203 | inline FloatPoint& operator+=(FloatPoint& a, const FloatPoint& b) |
204 | { |
205 | a.move(b.x(), b.y()); |
206 | return a; |
207 | } |
208 | |
209 | inline FloatPoint& operator-=(FloatPoint& a, const FloatSize& b) |
210 | { |
211 | a.move(-b.width(), -b.height()); |
212 | return a; |
213 | } |
214 | |
215 | inline FloatPoint operator+(const FloatPoint& a, const FloatSize& b) |
216 | { |
217 | return FloatPoint(a.x() + b.width(), a.y() + b.height()); |
218 | } |
219 | |
220 | inline FloatPoint operator+(const FloatPoint& a, const FloatPoint& b) |
221 | { |
222 | return FloatPoint(a.x() + b.x(), a.y() + b.y()); |
223 | } |
224 | |
225 | inline FloatSize operator-(const FloatPoint& a, const FloatPoint& b) |
226 | { |
227 | return FloatSize(a.x() - b.x(), a.y() - b.y()); |
228 | } |
229 | |
230 | inline FloatPoint operator-(const FloatPoint& a, const FloatSize& b) |
231 | { |
232 | return FloatPoint(a.x() - b.width(), a.y() - b.height()); |
233 | } |
234 | |
235 | inline FloatPoint operator-(const FloatPoint& a) |
236 | { |
237 | return FloatPoint(-a.x(), -a.y()); |
238 | } |
239 | |
240 | inline bool operator==(const FloatPoint& a, const FloatPoint& b) |
241 | { |
242 | return a.x() == b.x() && a.y() == b.y(); |
243 | } |
244 | |
245 | inline bool operator!=(const FloatPoint& a, const FloatPoint& b) |
246 | { |
247 | return a.x() != b.x() || a.y() != b.y(); |
248 | } |
249 | |
250 | inline float operator*(const FloatPoint& a, const FloatPoint& b) |
251 | { |
252 | // dot product |
253 | return a.dot(b); |
254 | } |
255 | |
256 | inline IntSize flooredIntSize(const FloatPoint& p) |
257 | { |
258 | return IntSize(clampToInteger(floorf(p.x())), clampToInteger(floorf(p.y()))); |
259 | } |
260 | |
261 | inline IntPoint roundedIntPoint(const FloatPoint& p) |
262 | { |
263 | return IntPoint(clampToInteger(roundf(p.x())), clampToInteger(roundf(p.y()))); |
264 | } |
265 | |
266 | inline IntPoint flooredIntPoint(const FloatPoint& p) |
267 | { |
268 | return IntPoint(clampToInteger(floorf(p.x())), clampToInteger(floorf(p.y()))); |
269 | } |
270 | |
271 | inline IntPoint ceiledIntPoint(const FloatPoint& p) |
272 | { |
273 | return IntPoint(clampToInteger(ceilf(p.x())), clampToInteger(ceilf(p.y()))); |
274 | } |
275 | |
276 | inline FloatPoint floorPointToDevicePixels(const FloatPoint& p, float deviceScaleFactor) |
277 | { |
278 | return FloatPoint(floorf(p.x() * deviceScaleFactor) / deviceScaleFactor, floorf(p.y() * deviceScaleFactor) / deviceScaleFactor); |
279 | } |
280 | |
281 | inline FloatPoint ceilPointToDevicePixels(const FloatPoint& p, float deviceScaleFactor) |
282 | { |
283 | return FloatPoint(ceilf(p.x() * deviceScaleFactor) / deviceScaleFactor, ceilf(p.y() * deviceScaleFactor) / deviceScaleFactor); |
284 | } |
285 | |
286 | inline FloatSize toFloatSize(const FloatPoint& a) |
287 | { |
288 | return FloatSize(a.x(), a.y()); |
289 | } |
290 | |
291 | inline FloatPoint toFloatPoint(const FloatSize& a) |
292 | { |
293 | return FloatPoint(a.width(), a.height()); |
294 | } |
295 | |
296 | inline 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 | |
301 | WEBCORE_EXPORT WTF::TextStream& operator<<(WTF::TextStream&, const FloatPoint&); |
302 | |
303 | } |
304 | |
305 | |