1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
/*
* Copyright (C) 2007 Eric Seidel <eric@webkit.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "SVGTransformDistance.h"
#include "FloatConversion.h"
#include "FloatPoint.h"
#include "FloatSize.h"
#include "SVGTransformValue.h"
#include <math.h>
namespace WebCore {
SVGTransformDistance::SVGTransformDistance()
: m_type(SVGTransformValue::SVG_TRANSFORM_UNKNOWN)
, m_angle(0)
, m_cx(0)
, m_cy(0)
{
}
SVGTransformDistance::SVGTransformDistance(SVGTransformValue::SVGTransformType type, float angle, float cx, float cy, const AffineTransform& transform)
: m_type(type)
, m_angle(angle)
, m_cx(cx)
, m_cy(cy)
, m_transform(transform)
{
}
SVGTransformDistance::SVGTransformDistance(const SVGTransformValue& fromSVGTransform, const SVGTransformValue& toSVGTransform)
: m_type(fromSVGTransform.type())
, m_angle(0)
, m_cx(0)
, m_cy(0)
{
ASSERT(m_type == toSVGTransform.type());
switch (m_type) {
case SVGTransformValue::SVG_TRANSFORM_MATRIX:
ASSERT_NOT_REACHED();
#if !ASSERT_ENABLED
FALLTHROUGH;
#endif
case SVGTransformValue::SVG_TRANSFORM_UNKNOWN:
break;
case SVGTransformValue::SVG_TRANSFORM_ROTATE: {
FloatSize centerDistance = toSVGTransform.rotationCenter() - fromSVGTransform.rotationCenter();
m_angle = toSVGTransform.angle() - fromSVGTransform.angle();
m_cx = centerDistance.width();
m_cy = centerDistance.height();
break;
}
case SVGTransformValue::SVG_TRANSFORM_TRANSLATE: {
FloatSize translationDistance = toSVGTransform.translate() - fromSVGTransform.translate();
m_transform.translate(translationDistance.width(), translationDistance.height());
break;
}
case SVGTransformValue::SVG_TRANSFORM_SCALE: {
float scaleX = toSVGTransform.scale().width() - fromSVGTransform.scale().width();
float scaleY = toSVGTransform.scale().height() - fromSVGTransform.scale().height();
m_transform.scaleNonUniform(scaleX, scaleY);
break;
}
case SVGTransformValue::SVG_TRANSFORM_SKEWX:
case SVGTransformValue::SVG_TRANSFORM_SKEWY:
m_angle = toSVGTransform.angle() - fromSVGTransform.angle();
break;
}
}
SVGTransformDistance SVGTransformDistance::scaledDistance(float scaleFactor) const
{
switch (m_type) {
case SVGTransformValue::SVG_TRANSFORM_MATRIX:
ASSERT_NOT_REACHED();
#if !ASSERT_ENABLED
FALLTHROUGH;
#endif
case SVGTransformValue::SVG_TRANSFORM_UNKNOWN:
return SVGTransformDistance();
case SVGTransformValue::SVG_TRANSFORM_ROTATE:
return SVGTransformDistance(m_type, m_angle * scaleFactor, m_cx * scaleFactor, m_cy * scaleFactor, AffineTransform());
case SVGTransformValue::SVG_TRANSFORM_SCALE:
return SVGTransformDistance(m_type, m_angle * scaleFactor, m_cx * scaleFactor, m_cy * scaleFactor, AffineTransform(m_transform).scale(scaleFactor));
case SVGTransformValue::SVG_TRANSFORM_TRANSLATE: {
AffineTransform newTransform(m_transform);
newTransform.setE(m_transform.e() * scaleFactor);
newTransform.setF(m_transform.f() * scaleFactor);
return SVGTransformDistance(m_type, 0, 0, 0, newTransform);
}
case SVGTransformValue::SVG_TRANSFORM_SKEWX:
case SVGTransformValue::SVG_TRANSFORM_SKEWY:
return SVGTransformDistance(m_type, m_angle * scaleFactor, m_cx * scaleFactor, m_cy * scaleFactor, AffineTransform());
}
ASSERT_NOT_REACHED();
return SVGTransformDistance();
}
SVGTransformValue SVGTransformDistance::addSVGTransforms(const SVGTransformValue& first, const SVGTransformValue& second, unsigned repeatCount)
{
ASSERT(first.type() == second.type());
SVGTransformValue transform;
switch (first.type()) {
case SVGTransformValue::SVG_TRANSFORM_MATRIX:
ASSERT_NOT_REACHED();
#if !ASSERT_ENABLED
FALLTHROUGH;
#endif
case SVGTransformValue::SVG_TRANSFORM_UNKNOWN:
return { };
case SVGTransformValue::SVG_TRANSFORM_ROTATE: {
transform.setRotate(first.angle() + second.angle() * repeatCount, first.rotationCenter().x() + second.rotationCenter().x() * repeatCount, first.rotationCenter().y() + second.rotationCenter().y() * repeatCount);
return transform;
}
case SVGTransformValue::SVG_TRANSFORM_TRANSLATE: {
float dx = first.translate().x() + second.translate().x() * repeatCount;
float dy = first.translate().y() + second.translate().y() * repeatCount;
transform.setTranslate(dx, dy);
return transform;
}
case SVGTransformValue::SVG_TRANSFORM_SCALE: {
FloatSize scale = second.scale();
scale.scale(repeatCount);
scale += first.scale();
transform.setScale(scale.width(), scale.height());
return transform;
}
case SVGTransformValue::SVG_TRANSFORM_SKEWX:
transform.setSkewX(first.angle() + second.angle() * repeatCount);
return transform;
case SVGTransformValue::SVG_TRANSFORM_SKEWY:
transform.setSkewY(first.angle() + second.angle() * repeatCount);
return transform;
}
ASSERT_NOT_REACHED();
return { };
}
SVGTransformValue SVGTransformDistance::addToSVGTransform(const SVGTransformValue& transform) const
{
ASSERT(m_type == transform.type() || !transform.isValid());
SVGTransformValue newTransform(transform);
switch (m_type) {
case SVGTransformValue::SVG_TRANSFORM_MATRIX:
ASSERT_NOT_REACHED();
#if !ASSERT_ENABLED
FALLTHROUGH;
#endif
case SVGTransformValue::SVG_TRANSFORM_UNKNOWN:
return { };
case SVGTransformValue::SVG_TRANSFORM_TRANSLATE: {
FloatPoint translation = transform.translate();
translation += FloatSize::narrowPrecision(m_transform.e(), m_transform.f());
newTransform.setTranslate(translation.x(), translation.y());
return newTransform;
}
case SVGTransformValue::SVG_TRANSFORM_SCALE: {
FloatSize scale = transform.scale();
scale += FloatSize::narrowPrecision(m_transform.a(), m_transform.d());
newTransform.setScale(scale.width(), scale.height());
return newTransform;
}
case SVGTransformValue::SVG_TRANSFORM_ROTATE: {
FloatPoint center = transform.rotationCenter();
newTransform.setRotate(transform.angle() + m_angle, center.x() + m_cx, center.y() + m_cy);
return newTransform;
}
case SVGTransformValue::SVG_TRANSFORM_SKEWX:
newTransform.setSkewX(transform.angle() + m_angle);
return newTransform;
case SVGTransformValue::SVG_TRANSFORM_SKEWY:
newTransform.setSkewY(transform.angle() + m_angle);
return newTransform;
}
ASSERT_NOT_REACHED();
return { };
}
bool SVGTransformDistance::isZero() const
{
return m_transform.isIdentity() && !m_angle;
}
float SVGTransformDistance::distance() const
{
switch (m_type) {
case SVGTransformValue::SVG_TRANSFORM_MATRIX:
ASSERT_NOT_REACHED();
#if !ASSERT_ENABLED
FALLTHROUGH;
#endif
case SVGTransformValue::SVG_TRANSFORM_UNKNOWN:
return 0;
case SVGTransformValue::SVG_TRANSFORM_ROTATE:
return std::hypot(m_angle, m_cx, m_cy);
case SVGTransformValue::SVG_TRANSFORM_SCALE:
return static_cast<float>(std::hypot(m_transform.a(), m_transform.d()));
case SVGTransformValue::SVG_TRANSFORM_TRANSLATE:
return static_cast<float>(std::hypot(m_transform.e(), m_transform.f()));
case SVGTransformValue::SVG_TRANSFORM_SKEWX:
case SVGTransformValue::SVG_TRANSFORM_SKEWY:
return m_angle;
}
ASSERT_NOT_REACHED();
return 0;
}
}
|
