1 /*
2  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Library General Public
6  * License as published by the Free Software Foundation; either
7  * version 2 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12  * Library General Public License for more details.
13  *
14  * You should have received a copy of the GNU Library General Public License
15  * along with this library; see the file COPYING.LIB.  If not, write to
16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17  * Boston, MA 02110-1301, USA.
18  */
19 
20 #ifndef SVGPathBlender_h
21 #define SVGPathBlender_h
22 
23 #if ENABLE(SVG)
24 #include "SVGPathConsumer.h"
25 #include "SVGPathSource.h"
26 
27 namespace WebCore {
28 
29 enum FloatBlendMode {
30     BlendHorizontal,
31     BlendVertical
32 };
33 
34 class SVGPathBlender {
35     WTF_MAKE_NONCOPYABLE(SVGPathBlender); WTF_MAKE_FAST_ALLOCATED;
36 public:
37     SVGPathBlender();
38 
39     bool blendAnimatedPath(float, SVGPathSource*, SVGPathSource*, SVGPathConsumer*);
40     void cleanup();
41 
42 private:
43     bool blendMoveToSegment();
44     bool blendLineToSegment();
45     bool blendLineToHorizontalSegment();
46     bool blendLineToVerticalSegment();
47     bool blendCurveToCubicSegment();
48     bool blendCurveToCubicSmoothSegment();
49     bool blendCurveToQuadraticSegment();
50     bool blendCurveToQuadraticSmoothSegment();
51     bool blendArcToSegment();
52 
53     float blendAnimatedDimensonalFloat(float, float, FloatBlendMode);
54     FloatPoint blendAnimatedFloatPoint(const FloatPoint& from, const FloatPoint& to);
55 
56     SVGPathSource* m_fromSource;
57     SVGPathSource* m_toSource;
58     SVGPathConsumer* m_consumer;
59 
60     FloatPoint m_fromCurrentPoint;
61     FloatPoint m_toCurrentPoint;
62 
63     PathCoordinateMode m_fromMode;
64     PathCoordinateMode m_toMode;
65     float m_progress;
66     bool m_isInFirstHalfOfAnimation;
67 };
68 
69 } // namespace WebCore
70 
71 #endif // ENABLE(SVG)
72 #endif // SVGPathBlender_h
73