Home | History | Annotate | Download | only in svg 
      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