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
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
|
/*
Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
2004, 2005 Rob Buis <buis@kde.org>
Copyright (C) 2007 Eric Seidel <eric@webkit.org>
This file is part of the WebKit project
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"
#if ENABLE(SVG)
#include "SVGPathSegList.h"
#include "FloatPoint.h"
#include "Path.h"
#include "PathTraversalState.h"
#include "SVGPathSegArc.h"
#include "SVGPathSegClosePath.h"
#include "SVGPathSegMoveto.h"
#include "SVGPathSegLineto.h"
#include "SVGPathSegLinetoHorizontal.h"
#include "SVGPathSegLinetoVertical.h"
#include "SVGPathSegCurvetoCubic.h"
#include "SVGPathSegCurvetoCubicSmooth.h"
#include "SVGPathSegCurvetoQuadratic.h"
#include "SVGPathSegCurvetoQuadraticSmooth.h"
namespace WebCore {
SVGPathSegList::SVGPathSegList(const QualifiedName& attributeName)
: SVGList<RefPtr<SVGPathSeg> >(attributeName)
{
}
SVGPathSegList::~SVGPathSegList()
{
}
unsigned SVGPathSegList::getPathSegAtLength(double)
{
// FIXME : to be useful this will need to support non-normalized SVGPathSegLists
ExceptionCode ec = 0;
int len = numberOfItems();
// FIXME: Eventually this will likely move to a "path applier"-like model, until then PathTraversalState is less useful as we could just use locals
PathTraversalState traversalState(PathTraversalState::TraversalSegmentAtLength);
for (int i = 0; i < len; ++i) {
SVGPathSeg* segment = getItem(i, ec).get();
float segmentLength = 0;
switch (segment->pathSegType()) {
case SVGPathSeg::PATHSEG_MOVETO_ABS:
{
SVGPathSegMovetoAbs* moveTo = static_cast<SVGPathSegMovetoAbs*>(segment);
segmentLength = traversalState.moveTo(FloatPoint(moveTo->x(), moveTo->y()));
break;
}
case SVGPathSeg::PATHSEG_LINETO_ABS:
{
SVGPathSegLinetoAbs* lineTo = static_cast<SVGPathSegLinetoAbs*>(segment);
segmentLength = traversalState.lineTo(FloatPoint(lineTo->x(), lineTo->y()));
break;
}
case SVGPathSeg::PATHSEG_CURVETO_CUBIC_ABS:
{
SVGPathSegCurvetoCubicAbs* curveTo = static_cast<SVGPathSegCurvetoCubicAbs*>(segment);
segmentLength = traversalState.cubicBezierTo(FloatPoint(curveTo->x1(), curveTo->y1()),
FloatPoint(curveTo->x2(), curveTo->y2()),
FloatPoint(curveTo->x(), curveTo->y()));
break;
}
case SVGPathSeg::PATHSEG_CLOSEPATH:
segmentLength = traversalState.closeSubpath();
break;
default:
ASSERT(false); // FIXME: This only works with normalized/processed path data.
break;
}
traversalState.m_totalLength += segmentLength;
if ((traversalState.m_action == PathTraversalState::TraversalSegmentAtLength)
&& (traversalState.m_totalLength > traversalState.m_desiredLength)) {
return traversalState.m_segmentIndex;
}
traversalState.m_segmentIndex++;
}
return 0; // The SVG spec is unclear as to what to return when the distance is not on the path
}
Path SVGPathSegList::toPathData()
{
// FIXME : This should also support non-normalized PathSegLists
Path pathData;
ExceptionCode ec = 0;
int len = numberOfItems();
for (int i = 0; i < len; ++i) {
SVGPathSeg* segment = getItem(i, ec).get();;
switch (segment->pathSegType())
{
case SVGPathSeg::PATHSEG_MOVETO_ABS:
{
SVGPathSegMovetoAbs* moveTo = static_cast<SVGPathSegMovetoAbs*>(segment);
pathData.moveTo(FloatPoint(moveTo->x(), moveTo->y()));
break;
}
case SVGPathSeg::PATHSEG_LINETO_ABS:
{
SVGPathSegLinetoAbs* lineTo = static_cast<SVGPathSegLinetoAbs*>(segment);
pathData.addLineTo(FloatPoint(lineTo->x(), lineTo->y()));
break;
}
case SVGPathSeg::PATHSEG_CURVETO_CUBIC_ABS:
{
SVGPathSegCurvetoCubicAbs* curveTo = static_cast<SVGPathSegCurvetoCubicAbs*>(segment);
pathData.addBezierCurveTo(FloatPoint(curveTo->x1(), curveTo->y1()),
FloatPoint(curveTo->x2(), curveTo->y2()),
FloatPoint(curveTo->x(), curveTo->y()));
break;
}
case SVGPathSeg::PATHSEG_CLOSEPATH:
pathData.closeSubpath();
break;
default:
ASSERT(false); // FIXME: This only works with normalized/processed path data.
break;
}
}
return pathData;
}
static inline float blendFunc(float from, float to, float progress)
{
return (to - from) * progress + from;
}
#define BLENDPATHSEG1(class, attr1) \
class::create(blendFunc(static_cast<class*>(from)->attr1(), static_cast<class*>(to)->attr1(), progress))
#define BLENDPATHSEG2(class, attr1, attr2) \
class::create(blendFunc(static_cast<class*>(from)->attr1(), static_cast<class*>(to)->attr1(), progress), \
blendFunc(static_cast<class*>(from)->attr2(), static_cast<class*>(to)->attr2(), progress))
#define BLENDPATHSEG4(class, attr1, attr2, attr3, attr4) \
class::create(blendFunc(static_cast<class*>(from)->attr1(), static_cast<class*>(to)->attr1(), progress), \
blendFunc(static_cast<class*>(from)->attr2(), static_cast<class*>(to)->attr2(), progress), \
blendFunc(static_cast<class*>(from)->attr3(), static_cast<class*>(to)->attr3(), progress), \
blendFunc(static_cast<class*>(from)->attr4(), static_cast<class*>(to)->attr4(), progress))
#define BLENDPATHSEG6(class, attr1, attr2, attr3, attr4, attr5, attr6) \
class::create(blendFunc(static_cast<class*>(from)->attr1(), static_cast<class*>(to)->attr1(), progress), \
blendFunc(static_cast<class*>(from)->attr2(), static_cast<class*>(to)->attr2(), progress), \
blendFunc(static_cast<class*>(from)->attr3(), static_cast<class*>(to)->attr3(), progress), \
blendFunc(static_cast<class*>(from)->attr4(), static_cast<class*>(to)->attr4(), progress), \
blendFunc(static_cast<class*>(from)->attr5(), static_cast<class*>(to)->attr5(), progress), \
blendFunc(static_cast<class*>(from)->attr6(), static_cast<class*>(to)->attr6(), progress))
#define BLENDPATHSEG7(class, attr1, attr2, attr3, attr4, attr5, bool1, bool2) \
class::create(blendFunc(static_cast<class*>(from)->attr1(), static_cast<class*>(to)->attr1(), progress), \
blendFunc(static_cast<class*>(from)->attr2(), static_cast<class*>(to)->attr2(), progress), \
blendFunc(static_cast<class*>(from)->attr3(), static_cast<class*>(to)->attr3(), progress), \
blendFunc(static_cast<class*>(from)->attr4(), static_cast<class*>(to)->attr4(), progress), \
blendFunc(static_cast<class*>(from)->attr5(), static_cast<class*>(to)->attr5(), progress), \
static_cast<bool>(blendFunc(static_cast<class*>(from)->bool1(), static_cast<class*>(to)->bool1(), progress)), \
static_cast<bool>(blendFunc(static_cast<class*>(from)->bool2(), static_cast<class*>(to)->bool2(), progress)))
PassRefPtr<SVGPathSegList> SVGPathSegList::createAnimated(const SVGPathSegList* fromList, const SVGPathSegList* toList, float progress)
{
unsigned itemCount = fromList->numberOfItems();
if (!itemCount || itemCount != toList->numberOfItems())
return 0;
RefPtr<SVGPathSegList> result = create(fromList->associatedAttributeName());
ExceptionCode ec;
for (unsigned n = 0; n < itemCount; ++n) {
SVGPathSeg* from = fromList->getItem(n, ec).get();
SVGPathSeg* to = toList->getItem(n, ec).get();
if (from->pathSegType() == SVGPathSeg::PATHSEG_UNKNOWN || from->pathSegType() != to->pathSegType())
return 0;
RefPtr<SVGPathSeg> segment = 0;
switch (static_cast<SVGPathSeg::SVGPathSegType>(from->pathSegType())) {
case SVGPathSeg::PATHSEG_CLOSEPATH:
segment = SVGPathSegClosePath::create();
break;
case SVGPathSeg::PATHSEG_LINETO_HORIZONTAL_ABS:
segment = BLENDPATHSEG1(SVGPathSegLinetoHorizontalAbs, x);
break;
case SVGPathSeg::PATHSEG_LINETO_HORIZONTAL_REL:
segment = BLENDPATHSEG1(SVGPathSegLinetoHorizontalRel, x);
break;
case SVGPathSeg::PATHSEG_LINETO_VERTICAL_ABS:
segment = BLENDPATHSEG1(SVGPathSegLinetoVerticalAbs, y);
break;
case SVGPathSeg::PATHSEG_LINETO_VERTICAL_REL:
segment = BLENDPATHSEG1(SVGPathSegLinetoVerticalRel, y);
break;
case SVGPathSeg::PATHSEG_MOVETO_ABS:
segment = BLENDPATHSEG2(SVGPathSegMovetoAbs, x, y);
break;
case SVGPathSeg::PATHSEG_MOVETO_REL:
segment = BLENDPATHSEG2(SVGPathSegMovetoRel, x, y);
break;
case SVGPathSeg::PATHSEG_LINETO_ABS:
segment = BLENDPATHSEG2(SVGPathSegLinetoAbs, x, y);
break;
case SVGPathSeg::PATHSEG_LINETO_REL:
segment = BLENDPATHSEG2(SVGPathSegLinetoRel, x, y);
break;
case SVGPathSeg::PATHSEG_CURVETO_CUBIC_ABS:
segment = BLENDPATHSEG6(SVGPathSegCurvetoCubicAbs, x, y, x1, y1, x2, y2);
break;
case SVGPathSeg::PATHSEG_CURVETO_CUBIC_REL:
segment = BLENDPATHSEG6(SVGPathSegCurvetoCubicRel, x, y, x1, y1, x2, y2);
break;
case SVGPathSeg::PATHSEG_CURVETO_CUBIC_SMOOTH_ABS:
segment = BLENDPATHSEG4(SVGPathSegCurvetoCubicSmoothAbs, x, y, x2, y2);
break;
case SVGPathSeg::PATHSEG_CURVETO_CUBIC_SMOOTH_REL:
segment = BLENDPATHSEG4(SVGPathSegCurvetoCubicSmoothRel, x, y, x2, y2);
break;
case SVGPathSeg::PATHSEG_CURVETO_QUADRATIC_ABS:
segment = BLENDPATHSEG4(SVGPathSegCurvetoQuadraticAbs, x, y, x1, y1);
break;
case SVGPathSeg::PATHSEG_CURVETO_QUADRATIC_REL:
segment = BLENDPATHSEG4(SVGPathSegCurvetoQuadraticRel, x, y, x1, y1);
break;
case SVGPathSeg::PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS:
segment = BLENDPATHSEG2(SVGPathSegCurvetoQuadraticSmoothAbs, x, y);
break;
case SVGPathSeg::PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL:
segment = BLENDPATHSEG2(SVGPathSegCurvetoQuadraticSmoothRel, x, y);
break;
case SVGPathSeg::PATHSEG_ARC_ABS:
segment = BLENDPATHSEG7(SVGPathSegArcAbs, x, y, r1, r2, angle, largeArcFlag, sweepFlag);
break;
case SVGPathSeg::PATHSEG_ARC_REL:
segment = BLENDPATHSEG7(SVGPathSegArcRel, x, y, r1, r2, angle, largeArcFlag, sweepFlag);
break;
case SVGPathSeg::PATHSEG_UNKNOWN:
ASSERT_NOT_REACHED();
}
result->appendItem(segment, ec);
}
return result.release();
}
}
#endif // ENABLE(SVG)
|
