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//----------------------------------------------------------------------------
// Anti-Grain Geometry - Version 2.2
// Copyright (C) 2002-2004 Maxim Shemanarev (http://www.antigrain.com)
//
// Permission to copy, use, modify, sell and distribute this software
// is granted provided this copyright notice appears in all copies.
// This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
//
//----------------------------------------------------------------------------
// Contact: mcseem@antigrain.com
// mcseemagg@yahoo.com
// http://www.antigrain.com
//----------------------------------------------------------------------------
//
// classes: vertex_iterator
// vertex_source_adaptor
// vertex_source_adaptor_with_id
//
//----------------------------------------------------------------------------
#ifndef AGG_VERTEX_ITERATOR_INCLUDED
#define AGG_VERTEX_ITERATOR_INCLUDED
#include "agg_basics.h"
namespace agg
{
//---------------------------------------------------------vertex_iterator
template<class VertexSource> class vertex_iterator
{
public:
vertex_iterator() {}
vertex_iterator(unsigned cmd) { m_vertex.cmd = cmd; }
vertex_iterator(const vertex_iterator& i) : m_vs(i.m_vs), m_vertex(i.m_vertex) {}
vertex_iterator(VertexSource& vs, unsigned id) : m_vs(&vs)
{
m_vs->rewind(id);
m_vertex.cmd = m_vs->vertex(&m_vertex.x, &m_vertex.y);
}
vertex_iterator& operator++()
{
m_vertex.cmd = m_vs->vertex(&m_vertex.x, &m_vertex.y);
return *this;
}
const vertex_type& operator*() const { return m_vertex; }
const vertex_type* operator->() const { return &m_vertex; }
bool operator != (const vertex_iterator& i)
{
return m_vertex.cmd != i.m_vertex.cmd;
}
private:
VertexSource* m_vs;
vertex_type m_vertex;
};
//---------------------------------------------------vertex_source_adaptor
template<class VertexContainer> class vertex_source_adaptor
{
public:
vertex_source_adaptor(const VertexContainer& container) :
m_container(&container) {}
void rewind(unsigned)
{
m_iterator = m_container->begin();
m_end = m_container->end();
}
unsigned vertex(double* x, double* y)
{
unsigned cmd = path_cmd_stop;
if(m_iterator != m_end)
{
*x = m_iterator->x;
*y = m_iterator->y;
cmd = m_iterator->cmd;
++m_iterator;
}
return cmd;
}
private:
const VertexContainer* m_container;
typename VertexContainer::const_iterator m_iterator;
typename VertexContainer::const_iterator m_end;
};
//-------------------------------------------vertex_source_adaptor_with_id
template<class VertexContainer> class vertex_source_adaptor_with_id
{
public:
vertex_source_adaptor_with_id(const VertexContainer& container) :
m_container(&container) {}
void rewind(unsigned id)
{
m_iterator = m_container->begin(id);
m_end = m_container->end();
}
unsigned vertex(double* x, double* y)
{
unsigned cmd = path_cmd_stop;
if(m_iterator != m_end)
{
*x = m_iterator->x;
*y = m_iterator->y;
cmd = m_iterator->cmd;
++m_iterator;
}
return cmd;
}
private:
const VertexContainer* m_container;
typename VertexContainer::const_iterator m_iterator;
typename VertexContainer::const_iterator m_end;
};
}
#endif
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