39241fe228
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@9933 a95241bf-73f2-0310-859d-f6bbb57e9c96
134 lines
3.9 KiB
C++
134 lines
3.9 KiB
C++
//----------------------------------------------------------------------------
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// Anti-Grain Geometry - Version 2.2
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// Copyright (C) 2002-2004 Maxim Shemanarev (http://www.antigrain.com)
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//
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// Permission to copy, use, modify, sell and distribute this software
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// is granted provided this copyright notice appears in all copies.
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// This software is provided "as is" without express or implied
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// warranty, and with no claim as to its suitability for any purpose.
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//
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//----------------------------------------------------------------------------
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// Contact: mcseem@antigrain.com
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// mcseemagg@yahoo.com
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// http://www.antigrain.com
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//----------------------------------------------------------------------------
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//
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// classes: vertex_iterator
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// vertex_source_adaptor
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// vertex_source_adaptor_with_id
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//
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//----------------------------------------------------------------------------
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#ifndef AGG_VERTEX_ITERATOR_INCLUDED
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#define AGG_VERTEX_ITERATOR_INCLUDED
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#include "agg_basics.h"
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namespace agg
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{
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//---------------------------------------------------------vertex_iterator
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template<class VertexSource> class vertex_iterator
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{
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public:
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vertex_iterator() {}
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vertex_iterator(unsigned cmd) { m_vertex.cmd = cmd; }
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vertex_iterator(const vertex_iterator& i) : m_vs(i.m_vs), m_vertex(i.m_vertex) {}
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vertex_iterator(VertexSource& vs, unsigned id) : m_vs(&vs)
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{
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m_vs->rewind(id);
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m_vertex.cmd = m_vs->vertex(&m_vertex.x, &m_vertex.y);
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}
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vertex_iterator& operator++()
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{
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m_vertex.cmd = m_vs->vertex(&m_vertex.x, &m_vertex.y);
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return *this;
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}
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const vertex_type& operator*() const { return m_vertex; }
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const vertex_type* operator->() const { return &m_vertex; }
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bool operator != (const vertex_iterator& i)
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{
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return m_vertex.cmd != i.m_vertex.cmd;
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}
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private:
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VertexSource* m_vs;
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vertex_type m_vertex;
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};
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//---------------------------------------------------vertex_source_adaptor
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template<class VertexContainer> class vertex_source_adaptor
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{
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public:
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vertex_source_adaptor(const VertexContainer& container) :
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m_container(&container) {}
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void rewind(unsigned)
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{
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m_iterator = m_container->begin();
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m_end = m_container->end();
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}
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unsigned vertex(double* x, double* y)
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{
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unsigned cmd = path_cmd_stop;
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if(m_iterator != m_end)
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{
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*x = m_iterator->x;
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*y = m_iterator->y;
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cmd = m_iterator->cmd;
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++m_iterator;
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}
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return cmd;
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}
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private:
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const VertexContainer* m_container;
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typename VertexContainer::const_iterator m_iterator;
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typename VertexContainer::const_iterator m_end;
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};
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//-------------------------------------------vertex_source_adaptor_with_id
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template<class VertexContainer> class vertex_source_adaptor_with_id
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{
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public:
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vertex_source_adaptor_with_id(const VertexContainer& container) :
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m_container(&container) {}
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void rewind(unsigned id)
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{
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m_iterator = m_container->begin(id);
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m_end = m_container->end();
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}
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unsigned vertex(double* x, double* y)
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{
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unsigned cmd = path_cmd_stop;
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if(m_iterator != m_end)
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{
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*x = m_iterator->x;
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*y = m_iterator->y;
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cmd = m_iterator->cmd;
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++m_iterator;
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}
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return cmd;
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}
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private:
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const VertexContainer* m_container;
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typename VertexContainer::const_iterator m_iterator;
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typename VertexContainer::const_iterator m_end;
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};
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}
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#endif
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