1 /*
2 * callback interface for SVG path data
3 *
4 * Copyright 2007 MenTaLguY <mental@rydia.net>
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it either under the terms of the GNU Lesser General Public
8 * License version 2.1 as published by the Free Software Foundation
9 * (the "LGPL") or, at your option, under the terms of the Mozilla
10 * Public License Version 1.1 (the "MPL"). If you do not alter this
11 * notice, a recipient may use your version of this file under either
12 * the MPL or the LGPL.
13 *
14 * You should have received a copy of the LGPL along with this library
15 * in the file COPYING-LGPL-2.1; if not, output to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 * You should have received a copy of the MPL along with this library
18 * in the file COPYING-MPL-1.1
19 *
20 * The contents of this file are subject to the Mozilla Public License
21 * Version 1.1 (the "License"); you may not use this file except in
22 * compliance with the License. You may obtain a copy of the License at
23 * http://www.mozilla.org/MPL/
24 *
25 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
26 * OF ANY KIND, either express or implied. See the LGPL or the MPL for
27 * the specific language governing rights and limitations.
28 *
29 */
31 #include <2geom/sbasis-to-bezier.h>
32 #include <2geom/svg-path.h>
33 #include <2geom/exception.h>
35 namespace Geom {
37 void output(Curve const &curve, SVGPathSink &sink) {
38 std::vector<Point> pts;
39 sbasis_to_bezier(pts, curve.toSBasis(), 2); //TODO: use something better!
40 sink.curveTo(pts[0], pts[1], pts[2]);
41 }
43 void output(HLineSegment const &curve, SVGPathSink &sink) {
44 sink.hlineTo(curve.finalPoint()[X]);
45 }
47 void output(VLineSegment const &curve, SVGPathSink &sink) {
48 sink.vlineTo(curve.finalPoint()[Y]);
49 }
51 void output(LineSegment const &curve, SVGPathSink &sink) {
52 sink.lineTo(curve[1]);
53 }
55 void output(CubicBezier const &curve, SVGPathSink &sink) {
56 sink.curveTo(curve[1], curve[2], curve[3]);
57 }
59 void output(QuadraticBezier const &curve, SVGPathSink &sink) {
60 sink.quadTo(curve[1], curve[2]);
61 }
63 void output(SVGEllipticalArc const &curve, SVGPathSink &sink) {
64 sink.arcTo( curve.ray(X), curve.ray(Y), curve.rotation_angle(),
65 curve.large_arc_flag(), curve.sweep_flag(),
66 curve.finalPoint() );
67 }
69 template <typename T>
70 bool output_as(Curve const &curve, SVGPathSink &sink) {
71 T const *t = dynamic_cast<T const *>(&curve);
72 if (t) {
73 output(*t, sink);
74 return true;
75 } else {
76 return false;
77 }
78 }
80 void output_svg_path(Path &path, SVGPathSink &sink) {
81 sink.moveTo(path.front().initialPoint());
83 Path::iterator iter;
84 for ( iter = path.begin() ; iter != path.end() ; ++iter ) {
85 output_as<HLineSegment>(*iter, sink) ||
86 output_as<VLineSegment>(*iter, sink) ||
87 output_as<LineSegment>(*iter, sink) ||
88 output_as<CubicBezier>(*iter, sink) ||
89 output_as<QuadraticBezier>(*iter, sink) ||
90 output_as<SVGEllipticalArc>(*iter, sink) ||
91 output_as<Curve>(*iter, sink);
92 }
94 if (path.closed()) {
95 sink.closePath();
96 }
97 sink.finish();
98 }
100 }
102 /*
103 Local Variables:
104 mode:c++
105 c-file-style:"stroustrup"
106 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
107 indent-tabs-mode:nil
108 fill-column:99
109 End:
110 */
111 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :