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Path.hh

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/*
    libpdf++: a C++ Free library to generate PDF file
    Copyright (C) 2002 Nestal Wan

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/
#ifndef __PDF_GRAPH_PATH_HEADER_INCLUDED__
#define __PDF_GRAPH_PATH_HEADER_INCLUDED__

#ifndef __PDF_GRAPH_STATE_HEADER_INCLUDED__
#include "State.hh"
#endif

#include <boost/smart_ptr.hpp>
#include <vector>
#include <iosfwd>

namespace pdf { namespace graph {

// forward declarations
class CNode ;

class CPath
{
public :

    enum EPaintOp
    {
        stoke,                     

        close_stoke,               

        fill_non_zero,             



        fill_even_odd,             


        fill_stoke_non_zero,       



        fill_stoke_even_odd,       


        
        close_fill_stoke_non_zero, 


        
        close_fill_stoke_even_odd, 



        no_op 


    } ;
    
private :
    typedef boost::shared_ptr<CNode> CNodePtr ;
    typedef std::vector<CNodePtr>    CNodeVec ;
    
    CNodeVec m_nodes ;          
    CState   m_state ;          

    EPaintOp m_paint_op ;       
    
public :
    explicit CPath( const CState& state = CState( ), EPaintOp op = stoke ) ;
    ~CPath( ) ;

    // attributes
    const CState& State( ) const { return m_state ; }

    // path operations  
    void MoveTo( double x, double y ) ;
    void LineTo( double x, double y ) ;
    void BezierCubic( double x1, double y1, double x2, double y2,
                      double x3, double y3 ) ;
    void BezierCubic1( double x1, double y1, double x3, double y3 ) ;
    void BezierCubic2( double x2, double y2, double x3, double y3 ) ;

    void ReturnToStart( ) ;

    void PaintOp( EPaintOp op ) ;
    
    std::ostream& Write( std::ostream& os, const CState& prev ) const ;

private :
#ifdef _DEBUG
    bool IsValid( ) const ;
#endif
} ;

} } // end of namespace

#endif

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