PathParser.h

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// 
//   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
//   Free Software Foundation, Inc
// 
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA

#ifndef GNASH_PATH_PARSER_H
#define GNASH_PATH_PARSER_H

#include <vector>
#include <deque>
#include <boost/utility.hpp>
#include "Geometry.h"
#include "SWFCxForm.h"


namespace gnash
{

struct UnivocalPath
{
  enum fill_type
  {
    FILL_RIGHT,
    FILL_LEFT
  };
  
  UnivocalPath() : _path(nullptr), _fill_type(FILL_LEFT) {}

  UnivocalPath(const Path* path, fill_type filltype)
    : _path(path),
      _fill_type(filltype)
  {
  }
  
  const point& startPoint() const;
  const point& endPoint() const;

  const Path* _path;
  fill_type   _fill_type;
};

//
class PathParser : boost::noncopyable
{
public:
  PathParser(const std::vector<Path>& paths, size_t num_styles);

  virtual ~PathParser() { }

  void run(const SWFCxForm& cx, const SWFMatrix& mat);

  virtual void prepareFill(int fill_style, const SWFCxForm& cx) = 0;
  
  virtual void terminateFill(int fill_style) = 0;
  
  virtual void fillShape()
  {
  }
  
  virtual void moveTo(const point& p) = 0;
  
  virtual void curveTo(const Edge& curve) = 0;

  virtual void lineTo(const point& p) = 0;

private:
  std::deque<UnivocalPath>::iterator emitConnecting(std::deque<UnivocalPath>& paths);
    
  void append(const UnivocalPath& append_path);
  
  void start_shapes(int fill_style, const SWFCxForm& cx);

  void end_shapes(int fill_style);

  void reset_shape(const UnivocalPath& append_path);
  
  bool closed_shape();

  void line_to(const Edge& curve);

  const std::vector<Path>& _paths;
  const size_t             _num_styles;
  point       _shape_origin;
  point       _cur_endpoint;
};

}

#endif // __PATH_PARSER_H