libcore/MorphShape.h

   1 // MorphShape.h: the MorphShape DisplayObject implementation for Gnash.
   2 //
   3 //   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Free Software
   4 //   Foundation, Inc
   5 //
   6 // This program is free software; you can redistribute it and/or modify
   7 // it under the terms of the GNU General Public License as published by
   8 // the Free Software Foundation; either version 3 of the License, or
   9 // (at your option) any later version.
  10 //
  11 // This program is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License
  17 // along with this program; if not, write to the Free Software
  18 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19
  20 #ifndef GNASH_MORPH_SHAPE_H
  21 #define GNASH_MORPH_SHAPE_H
  22
  23 #include "smart_ptr.h"
  24 #include "DisplayObject.h"
  25 #include "swf/DefineMorphShapeTag.h"
  26 #include <boost/intrusive_ptr.hpp>
  27 #include <cassert>
  28
  29 namespace gnash {
  30     class Renderer;
  31 }
  32
  33 namespace gnash {
  34
  35 /// A DisplayObject that tweens between two shapes.
  36 //
  37 /// A MorphShape has no properties of its own, but its inherited properties
  38 /// may be read in AS3 using a reference to the object created with
  39 /// getChildAt().
  40 //
  41 /// Morphing is controlled using a SWF::PlaceObject2 tag with a ratio flag.
  42 /// The most common and efficient way is to combine this with a move flag,
  43 /// so that this object is moved to the position specified by the ratio.
  44 /// However, it is also possible to remove and replace, in which case a
  45 /// new MorphShape is created.
  46 //
  47 /// The starting position is not necessarily identical with shape1, though in
  48 /// practice it often is.
  49 class MorphShape : public DisplayObject
  50 {
  51
  52 public:
  53
  54     MorphShape(movie_root& mr, as_object* object,
  55             const SWF::DefineMorphShapeTag* def, DisplayObject* parent);
  56
  57     virtual void display(Renderer& renderer, const Transform& xform);
  58
  59     virtual SWFRect getBounds() const;
  60
  61     virtual bool pointInShape(boost::int32_t  x, boost::int32_t  y) const;
  62
  63     const SWF::ShapeRecord& shape() const {
  64         return _shape;
  65     }
  66
  67 private:
  68
  69     void morph();
  70
  71     double currentRatio() const;
  72
  73     const boost::intrusive_ptr<const SWF::DefineMorphShapeTag> _def;
  74
  75     SWF::ShapeRecord _shape;
  76
  77 };
  78
  79
  80 } // namespace gnash
  81
  82
  83 #endif
  84
  85
  86 // Local Variables:
  87 // mode: C++
  88 // indent-tabs-mode: t
  89 // End: