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      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 #include "core/svg/SVGPathConsumer.h"
     24 
     25 namespace WebCore {
     26 
     27 enum FloatBlendMode {
     28     BlendHorizontal,
     29     BlendVertical
     30 };
     31 
     32 class SVGPathSource;
     33 
     34 class SVGPathBlender {
     35     WTF_MAKE_NONCOPYABLE(SVGPathBlender); WTF_MAKE_FAST_ALLOCATED;
     36 public:
     37     SVGPathBlender();
     38 
     39     bool addAnimatedPath(SVGPathSource*, SVGPathSource*, SVGPathConsumer*, unsigned repeatCount);
     40     bool blendAnimatedPath(float, SVGPathSource*, SVGPathSource*, SVGPathConsumer*);
     41     void cleanup();
     42 
     43 private:
     44     bool blendMoveToSegment();
     45     bool blendLineToSegment();
     46     bool blendLineToHorizontalSegment();
     47     bool blendLineToVerticalSegment();
     48     bool blendCurveToCubicSegment();
     49     bool blendCurveToCubicSmoothSegment();
     50     bool blendCurveToQuadraticSegment();
     51     bool blendCurveToQuadraticSmoothSegment();
     52     bool blendArcToSegment();
     53 
     54     float blendAnimatedDimensonalFloat(float, float, FloatBlendMode);
     55     FloatPoint blendAnimatedFloatPoint(const FloatPoint& from, const FloatPoint& to);
     56 
     57     SVGPathSource* m_fromSource;
     58     SVGPathSource* m_toSource;
     59     SVGPathConsumer* m_consumer;
     60 
     61     FloatPoint m_fromCurrentPoint;
     62     FloatPoint m_toCurrentPoint;
     63 
     64     PathCoordinateMode m_fromMode;
     65     PathCoordinateMode m_toMode;
     66     float m_progress;
     67     unsigned m_addTypesCount;
     68     bool m_isInFirstHalfOfAnimation;
     69 };
     70 
     71 } // namespace WebCore
     72 
     73 #endif // SVGPathBlender_h
     74