e39da397f5
* removed the useless parts of AGG (which are only needed for the interactive examples) * make sure to jam -a libagg.a to solve any linking issues git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17838 a95241bf-73f2-0310-859d-f6bbb57e9c96
1479 lines
47 KiB
C++
1479 lines
47 KiB
C++
//----------------------------------------------------------------------------
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// Anti-Grain Geometry - Version 2.4
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// Copyright (C) 2002-2005 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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#ifndef AGG_PATH_STORAGE_INCLUDED
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#define AGG_PATH_STORAGE_INCLUDED
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#include <string.h>
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#include <math.h>
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#include "agg_math.h"
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#include "agg_array.h"
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#include "agg_bezier_arc.h"
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namespace agg
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{
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//----------------------------------------------------vertex_block_storage
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template<class T, unsigned BlockShift=8, unsigned BlockPool=256>
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class vertex_block_storage
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{
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public:
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// Allocation parameters
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enum block_scale_e
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{
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block_shift = BlockShift,
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block_size = 1 << block_shift,
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block_mask = block_size - 1,
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block_pool = BlockPool
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};
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typedef T value_type;
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typedef vertex_block_storage<T, BlockShift, BlockPool> self_type;
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~vertex_block_storage();
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vertex_block_storage();
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vertex_block_storage(const self_type& v);
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const self_type& operator = (const self_type& ps);
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void remove_all();
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void free_all();
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void add_vertex(double x, double y, unsigned cmd);
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void modify_vertex(unsigned idx, double x, double y);
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void modify_vertex(unsigned idx, double x, double y, unsigned cmd);
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void modify_command(unsigned idx, unsigned cmd);
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void swap_vertices(unsigned v1, unsigned v2);
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unsigned last_command() const;
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unsigned last_vertex(double* x, double* y) const;
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unsigned prev_vertex(double* x, double* y) const;
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double last_x() const;
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double last_y() const;
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unsigned total_vertices() const;
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unsigned vertex(unsigned idx, double* x, double* y) const;
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unsigned command(unsigned idx) const;
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private:
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void allocate_block(unsigned nb);
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int8u* storage_ptrs(T** xy_ptr);
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private:
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unsigned m_total_vertices;
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unsigned m_total_blocks;
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unsigned m_max_blocks;
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T** m_coord_blocks;
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int8u** m_cmd_blocks;
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};
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//------------------------------------------------------------------------
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template<class T, unsigned S, unsigned P>
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void vertex_block_storage<T,S,P>::free_all()
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{
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if(m_total_blocks)
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{
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T** coord_blk = m_coord_blocks + m_total_blocks - 1;
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while(m_total_blocks--)
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{
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pod_allocator<T>::deallocate(
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*coord_blk,
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block_size * 2 +
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block_size / (sizeof(T) / sizeof(unsigned char)));
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--coord_blk;
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}
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pod_allocator<T*>::deallocate(m_coord_blocks, m_max_blocks * 2);
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m_total_blocks = 0;
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m_max_blocks = 0;
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m_coord_blocks = 0;
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m_cmd_blocks = 0;
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m_total_vertices = 0;
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}
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}
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//------------------------------------------------------------------------
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template<class T, unsigned S, unsigned P>
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vertex_block_storage<T,S,P>::~vertex_block_storage()
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{
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free_all();
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}
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//------------------------------------------------------------------------
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template<class T, unsigned S, unsigned P>
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vertex_block_storage<T,S,P>::vertex_block_storage() :
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m_total_vertices(0),
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m_total_blocks(0),
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m_max_blocks(0),
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m_coord_blocks(0),
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m_cmd_blocks(0)
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{
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}
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//------------------------------------------------------------------------
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template<class T, unsigned S, unsigned P>
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vertex_block_storage<T,S,P>::vertex_block_storage(const vertex_block_storage<T,S,P>& v) :
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m_total_vertices(0),
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m_total_blocks(0),
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m_max_blocks(0),
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m_coord_blocks(0),
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m_cmd_blocks(0)
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{
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*this = v;
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}
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//------------------------------------------------------------------------
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template<class T, unsigned S, unsigned P>
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const vertex_block_storage<T,S,P>&
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vertex_block_storage<T,S,P>::operator = (const vertex_block_storage<T,S,P>& v)
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{
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remove_all();
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unsigned i;
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for(i = 0; i < v.total_vertices(); i++)
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{
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double x, y;
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unsigned cmd = v.vertex(i, &x, &y);
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add_vertex(x, y, cmd);
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}
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return *this;
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}
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//------------------------------------------------------------------------
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template<class T, unsigned S, unsigned P>
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inline void vertex_block_storage<T,S,P>::remove_all()
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{
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m_total_vertices = 0;
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}
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//------------------------------------------------------------------------
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template<class T, unsigned S, unsigned P>
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inline void vertex_block_storage<T,S,P>::add_vertex(double x, double y,
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unsigned cmd)
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{
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T* coord_ptr = 0;
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*storage_ptrs(&coord_ptr) = (int8u)cmd;
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coord_ptr[0] = T(x);
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coord_ptr[1] = T(y);
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m_total_vertices++;
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}
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//------------------------------------------------------------------------
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template<class T, unsigned S, unsigned P>
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inline void vertex_block_storage<T,S,P>::modify_vertex(unsigned idx,
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double x, double y)
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{
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T* pv = m_coord_blocks[idx >> block_shift] + ((idx & block_mask) << 1);
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pv[0] = T(x);
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pv[1] = T(y);
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}
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//------------------------------------------------------------------------
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template<class T, unsigned S, unsigned P>
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inline void vertex_block_storage<T,S,P>::modify_vertex(unsigned idx,
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double x, double y,
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unsigned cmd)
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{
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unsigned block = idx >> block_shift;
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unsigned offset = idx & block_mask;
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T* pv = m_coord_blocks[block] + (offset << 1);
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pv[0] = T(x);
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pv[1] = T(y);
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m_cmd_blocks[block][offset] = (int8u)cmd;
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}
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//------------------------------------------------------------------------
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template<class T, unsigned S, unsigned P>
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inline void vertex_block_storage<T,S,P>::modify_command(unsigned idx,
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unsigned cmd)
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{
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m_cmd_blocks[idx >> block_shift][idx & block_mask] = (int8u)cmd;
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}
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//------------------------------------------------------------------------
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template<class T, unsigned S, unsigned P>
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inline void vertex_block_storage<T,S,P>::swap_vertices(unsigned v1, unsigned v2)
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{
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unsigned b1 = v1 >> block_shift;
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unsigned b2 = v2 >> block_shift;
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unsigned o1 = v1 & block_mask;
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unsigned o2 = v2 & block_mask;
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T* pv1 = m_coord_blocks[b1] + (o1 << 1);
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T* pv2 = m_coord_blocks[b2] + (o2 << 1);
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T val;
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val = pv1[0]; pv1[0] = pv2[0]; pv2[0] = val;
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val = pv1[1]; pv1[1] = pv2[1]; pv2[1] = val;
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int8u cmd = m_cmd_blocks[b1][o1];
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m_cmd_blocks[b1][o1] = m_cmd_blocks[b2][o2];
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m_cmd_blocks[b2][o2] = cmd;
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}
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//------------------------------------------------------------------------
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template<class T, unsigned S, unsigned P>
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inline unsigned vertex_block_storage<T,S,P>::last_command() const
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{
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if(m_total_vertices) return command(m_total_vertices - 1);
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return path_cmd_stop;
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}
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//------------------------------------------------------------------------
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template<class T, unsigned S, unsigned P>
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inline unsigned vertex_block_storage<T,S,P>::last_vertex(double* x, double* y) const
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{
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if(m_total_vertices) return vertex(m_total_vertices - 1, x, y);
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return path_cmd_stop;
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}
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//------------------------------------------------------------------------
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template<class T, unsigned S, unsigned P>
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inline unsigned vertex_block_storage<T,S,P>::prev_vertex(double* x, double* y) const
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{
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if(m_total_vertices > 1) return vertex(m_total_vertices - 2, x, y);
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return path_cmd_stop;
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}
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//------------------------------------------------------------------------
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template<class T, unsigned S, unsigned P>
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inline double vertex_block_storage<T,S,P>::last_x() const
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{
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if(m_total_vertices)
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{
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unsigned idx = m_total_vertices - 1;
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return m_coord_blocks[idx >> block_shift][(idx & block_mask) << 1];
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}
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return 0.0;
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}
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//------------------------------------------------------------------------
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template<class T, unsigned S, unsigned P>
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inline double vertex_block_storage<T,S,P>::last_y() const
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{
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if(m_total_vertices)
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{
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unsigned idx = m_total_vertices - 1;
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return m_coord_blocks[idx >> block_shift][((idx & block_mask) << 1) + 1];
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}
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return 0.0;
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}
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//------------------------------------------------------------------------
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template<class T, unsigned S, unsigned P>
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inline unsigned vertex_block_storage<T,S,P>::total_vertices() const
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{
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return m_total_vertices;
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}
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//------------------------------------------------------------------------
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template<class T, unsigned S, unsigned P>
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inline unsigned vertex_block_storage<T,S,P>::vertex(unsigned idx,
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double* x, double* y) const
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{
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unsigned nb = idx >> block_shift;
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const T* pv = m_coord_blocks[nb] + ((idx & block_mask) << 1);
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*x = pv[0];
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*y = pv[1];
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return m_cmd_blocks[nb][idx & block_mask];
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}
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//------------------------------------------------------------------------
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template<class T, unsigned S, unsigned P>
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inline unsigned vertex_block_storage<T,S,P>::command(unsigned idx) const
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{
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return m_cmd_blocks[idx >> block_shift][idx & block_mask];
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}
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//------------------------------------------------------------------------
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template<class T, unsigned S, unsigned P>
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void vertex_block_storage<T,S,P>::allocate_block(unsigned nb)
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{
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if(nb >= m_max_blocks)
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{
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T** new_coords =
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pod_allocator<T*>::allocate((m_max_blocks + block_pool) * 2);
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unsigned char** new_cmds =
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(unsigned char**)(new_coords + m_max_blocks + block_pool);
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if(m_coord_blocks)
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{
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memcpy(new_coords,
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m_coord_blocks,
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m_max_blocks * sizeof(T*));
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memcpy(new_cmds,
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m_cmd_blocks,
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m_max_blocks * sizeof(unsigned char*));
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pod_allocator<T*>::deallocate(m_coord_blocks, m_max_blocks * 2);
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}
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m_coord_blocks = new_coords;
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m_cmd_blocks = new_cmds;
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m_max_blocks += block_pool;
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}
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m_coord_blocks[nb] =
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pod_allocator<T>::allocate(block_size * 2 +
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block_size / (sizeof(T) / sizeof(unsigned char)));
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m_cmd_blocks[nb] =
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(unsigned char*)(m_coord_blocks[nb] + block_size * 2);
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m_total_blocks++;
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}
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//------------------------------------------------------------------------
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template<class T, unsigned S, unsigned P>
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int8u* vertex_block_storage<T,S,P>::storage_ptrs(T** xy_ptr)
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{
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unsigned nb = m_total_vertices >> block_shift;
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if(nb >= m_total_blocks)
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{
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allocate_block(nb);
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}
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*xy_ptr = m_coord_blocks[nb] + ((m_total_vertices & block_mask) << 1);
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return m_cmd_blocks[nb] + (m_total_vertices & block_mask);
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}
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//-----------------------------------------------------poly_plain_adaptor
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template<class T> class poly_plain_adaptor
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{
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public:
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typedef T value_type;
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poly_plain_adaptor() :
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m_data(0),
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m_ptr(0),
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m_end(0),
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m_closed(false),
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m_stop(false)
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{}
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poly_plain_adaptor(const T* data, unsigned num_points, bool closed) :
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m_data(data),
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m_ptr(data),
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m_end(data + num_points * 2),
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m_closed(closed),
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m_stop(false)
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{}
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void init(const T* data, unsigned num_points, bool closed)
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{
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m_data = data;
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m_ptr = data;
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m_end = data + num_points * 2;
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m_closed = closed;
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m_stop = false;
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}
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void rewind(unsigned)
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{
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m_ptr = m_data;
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m_stop = false;
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}
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unsigned vertex(double* x, double* y)
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{
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if(m_ptr < m_end)
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{
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bool first = m_ptr == m_data;
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*x = *m_ptr++;
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*y = *m_ptr++;
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return first ? path_cmd_move_to : path_cmd_line_to;
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}
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*x = *y = 0.0;
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if(m_closed && !m_stop)
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{
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m_stop = true;
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return path_cmd_end_poly | path_flags_close;
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}
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return path_cmd_stop;
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}
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private:
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const T* m_data;
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const T* m_ptr;
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const T* m_end;
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bool m_closed;
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bool m_stop;
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};
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//-------------------------------------------------poly_container_adaptor
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template<class Container> class poly_container_adaptor
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{
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public:
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typedef typename Container::value_type vertex_type;
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poly_container_adaptor() :
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m_container(0),
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m_index(0),
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m_closed(false),
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m_stop(false)
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{}
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poly_container_adaptor(const Container& data, bool closed) :
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m_container(&data),
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m_index(0),
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m_closed(closed),
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m_stop(false)
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{}
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void init(const Container& data, bool closed)
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{
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m_container = &data;
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m_index = 0;
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m_closed = closed;
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m_stop = false;
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}
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void rewind(unsigned)
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{
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m_index = 0;
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m_stop = false;
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}
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unsigned vertex(double* x, double* y)
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{
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if(m_index < m_container->size())
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{
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bool first = m_index == 0;
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const vertex_type& v = (*m_container)[m_index++];
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*x = v.x;
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*y = v.y;
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return first ? path_cmd_move_to : path_cmd_line_to;
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}
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*x = *y = 0.0;
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if(m_closed && !m_stop)
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{
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m_stop = true;
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return path_cmd_end_poly | path_flags_close;
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}
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return path_cmd_stop;
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}
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private:
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const Container* m_container;
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unsigned m_index;
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bool m_closed;
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bool m_stop;
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};
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//-----------------------------------------poly_container_reverse_adaptor
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template<class Container> class poly_container_reverse_adaptor
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{
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public:
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typedef typename Container::value_type vertex_type;
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poly_container_reverse_adaptor() :
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m_container(0),
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m_index(-1),
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m_closed(false),
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m_stop(false)
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{}
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poly_container_reverse_adaptor(const Container& data, bool closed) :
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m_container(&data),
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m_index(-1),
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m_closed(closed),
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m_stop(false)
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{}
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void init(const Container& data, bool closed)
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{
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m_container = &data;
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m_index = m_container->size() - 1;
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m_closed = closed;
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m_stop = false;
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}
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void rewind(unsigned)
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{
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m_index = m_container->size() - 1;
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m_stop = false;
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}
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unsigned vertex(double* x, double* y)
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{
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if(m_index >= 0)
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{
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bool first = m_index == int(m_container->size() - 1);
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const vertex_type& v = (*m_container)[m_index--];
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*x = v.x;
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*y = v.y;
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return first ? path_cmd_move_to : path_cmd_line_to;
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}
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*x = *y = 0.0;
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if(m_closed && !m_stop)
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{
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m_stop = true;
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return path_cmd_end_poly | path_flags_close;
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}
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return path_cmd_stop;
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}
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private:
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const Container* m_container;
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int m_index;
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bool m_closed;
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bool m_stop;
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};
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|
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//--------------------------------------------------------line_adaptor
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|
class line_adaptor
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{
|
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public:
|
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typedef double value_type;
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|
|
line_adaptor() : m_line(m_coord, 2, false) {}
|
|
line_adaptor(double x1, double y1, double x2, double y2) :
|
|
m_line(m_coord, 2, false)
|
|
{
|
|
m_coord[0] = x1;
|
|
m_coord[1] = y1;
|
|
m_coord[2] = x2;
|
|
m_coord[3] = y2;
|
|
}
|
|
|
|
void init(double x1, double y1, double x2, double y2)
|
|
{
|
|
m_coord[0] = x1;
|
|
m_coord[1] = y1;
|
|
m_coord[2] = x2;
|
|
m_coord[3] = y2;
|
|
m_line.rewind(0);
|
|
}
|
|
|
|
void rewind(unsigned)
|
|
{
|
|
m_line.rewind(0);
|
|
}
|
|
|
|
unsigned vertex(double* x, double* y)
|
|
{
|
|
return m_line.vertex(x, y);
|
|
}
|
|
|
|
private:
|
|
double m_coord[4];
|
|
poly_plain_adaptor<double> m_line;
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//---------------------------------------------------------------path_base
|
|
// A container to store vertices with their flags.
|
|
// A path consists of a number of contours separated with "move_to"
|
|
// commands. The path storage can keep and maintain more than one
|
|
// path.
|
|
// To navigate to the beginning of a particular path, use rewind(path_id);
|
|
// Where path_id is what start_new_path() returns. So, when you call
|
|
// start_new_path() you need to store its return value somewhere else
|
|
// to navigate to the path afterwards.
|
|
//
|
|
// See also: vertex_source concept
|
|
//------------------------------------------------------------------------
|
|
template<class VertexContainer> class path_base
|
|
{
|
|
public:
|
|
typedef VertexContainer container_type;
|
|
typedef path_base<VertexContainer> self_type;
|
|
|
|
//--------------------------------------------------------------------
|
|
path_base() : m_vertices(), m_iterator(0) {}
|
|
void remove_all() { m_vertices.remove_all(); m_iterator = 0; }
|
|
void free_all() { m_vertices.free_all(); m_iterator = 0; }
|
|
|
|
// Make path functions
|
|
//--------------------------------------------------------------------
|
|
unsigned start_new_path();
|
|
|
|
void move_to(double x, double y);
|
|
void move_rel(double dx, double dy);
|
|
|
|
void line_to(double x, double y);
|
|
void line_rel(double dx, double dy);
|
|
|
|
void hline_to(double x);
|
|
void hline_rel(double dx);
|
|
|
|
void vline_to(double y);
|
|
void vline_rel(double dy);
|
|
|
|
void arc_to(double rx, double ry,
|
|
double angle,
|
|
bool large_arc_flag,
|
|
bool sweep_flag,
|
|
double x, double y);
|
|
|
|
void arc_rel(double rx, double ry,
|
|
double angle,
|
|
bool large_arc_flag,
|
|
bool sweep_flag,
|
|
double dx, double dy);
|
|
|
|
void curve3(double x_ctrl, double y_ctrl,
|
|
double x_to, double y_to);
|
|
|
|
void curve3_rel(double dx_ctrl, double dy_ctrl,
|
|
double dx_to, double dy_to);
|
|
|
|
void curve3(double x_to, double y_to);
|
|
|
|
void curve3_rel(double dx_to, double dy_to);
|
|
|
|
void curve4(double x_ctrl1, double y_ctrl1,
|
|
double x_ctrl2, double y_ctrl2,
|
|
double x_to, double y_to);
|
|
|
|
void curve4_rel(double dx_ctrl1, double dy_ctrl1,
|
|
double dx_ctrl2, double dy_ctrl2,
|
|
double dx_to, double dy_to);
|
|
|
|
void curve4(double x_ctrl2, double y_ctrl2,
|
|
double x_to, double y_to);
|
|
|
|
void curve4_rel(double x_ctrl2, double y_ctrl2,
|
|
double x_to, double y_to);
|
|
|
|
|
|
void end_poly(unsigned flags = path_flags_close);
|
|
void close_polygon(unsigned flags = path_flags_none);
|
|
|
|
// Accessors
|
|
//--------------------------------------------------------------------
|
|
const container_type& vertices() const { return m_vertices; }
|
|
container_type& vertices() { return m_vertices; }
|
|
|
|
unsigned total_vertices() const;
|
|
|
|
void rel_to_abs(double* x, double* y) const;
|
|
|
|
unsigned last_vertex(double* x, double* y) const;
|
|
unsigned prev_vertex(double* x, double* y) const;
|
|
|
|
double last_x() const;
|
|
double last_y() const;
|
|
|
|
unsigned vertex(unsigned idx, double* x, double* y) const;
|
|
unsigned command(unsigned idx) const;
|
|
|
|
void modify_vertex(unsigned idx, double x, double y);
|
|
void modify_vertex(unsigned idx, double x, double y, unsigned cmd);
|
|
void modify_command(unsigned idx, unsigned cmd);
|
|
|
|
// VertexSource interface
|
|
//--------------------------------------------------------------------
|
|
void rewind(unsigned path_id);
|
|
unsigned vertex(double* x, double* y);
|
|
|
|
// Arrange the orientation of a polygon, all polygons in a path,
|
|
// or in all paths. After calling arrange_orientations() or
|
|
// arrange_orientations_all_paths(), all the polygons will have
|
|
// the same orientation, i.e. path_flags_cw or path_flags_ccw
|
|
//--------------------------------------------------------------------
|
|
unsigned arrange_polygon_orientation(unsigned start, path_flags_e orientation);
|
|
unsigned arrange_orientations(unsigned path_id, path_flags_e orientation);
|
|
void arrange_orientations_all_paths(path_flags_e orientation);
|
|
void invert_polygon(unsigned start);
|
|
|
|
// Flip all vertices horizontally or vertically,
|
|
// between x1 and x2, or between y1 and y2 respectively
|
|
//--------------------------------------------------------------------
|
|
void flip_x(double x1, double x2);
|
|
void flip_y(double y1, double y2);
|
|
|
|
// Concatenate path. The path is added as is.
|
|
//--------------------------------------------------------------------
|
|
template<class VertexSource>
|
|
void concat_path(VertexSource& vs, unsigned path_id = 0)
|
|
{
|
|
double x, y;
|
|
unsigned cmd;
|
|
vs.rewind(path_id);
|
|
while(!is_stop(cmd = vs.vertex(&x, &y)))
|
|
{
|
|
m_vertices.add_vertex(x, y, cmd);
|
|
}
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
// Join path. The path is joined with the existing one, that is,
|
|
// it behaves as if the pen of a plotter was always down (drawing)
|
|
template<class VertexSource>
|
|
void join_path(VertexSource& vs, unsigned path_id = 0)
|
|
{
|
|
double x, y;
|
|
unsigned cmd;
|
|
vs.rewind(path_id);
|
|
cmd = vs.vertex(&x, &y);
|
|
if(!is_stop(cmd))
|
|
{
|
|
if(is_vertex(cmd))
|
|
{
|
|
double x0, y0;
|
|
unsigned cmd0 = last_vertex(&x0, &y0);
|
|
if(is_vertex(cmd0))
|
|
{
|
|
if(calc_distance(x, y, x0, y0) > vertex_dist_epsilon)
|
|
{
|
|
if(is_move_to(cmd)) cmd = path_cmd_line_to;
|
|
m_vertices.add_vertex(x, y, cmd);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if(is_stop(cmd0))
|
|
{
|
|
cmd = path_cmd_move_to;
|
|
}
|
|
else
|
|
{
|
|
if(is_move_to(cmd)) cmd = path_cmd_line_to;
|
|
}
|
|
m_vertices.add_vertex(x, y, cmd);
|
|
}
|
|
}
|
|
while(!is_stop(cmd = vs.vertex(&x, &y)))
|
|
{
|
|
m_vertices.add_vertex(x, y, is_move_to(cmd) ?
|
|
path_cmd_line_to :
|
|
cmd);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Concatenate polygon/polyline.
|
|
//--------------------------------------------------------------------
|
|
template<class T> void concat_poly(const T* data,
|
|
unsigned num_points,
|
|
bool closed)
|
|
{
|
|
poly_plain_adaptor<T> poly(data, num_points, closed);
|
|
concat_path(poly);
|
|
}
|
|
|
|
// Join polygon/polyline continuously.
|
|
//--------------------------------------------------------------------
|
|
template<class T> void join_poly(const T* data,
|
|
unsigned num_points,
|
|
bool closed)
|
|
{
|
|
poly_plain_adaptor<T> poly(data, num_points, closed);
|
|
join_path(poly);
|
|
}
|
|
|
|
|
|
private:
|
|
unsigned perceive_polygon_orientation(unsigned start, unsigned end);
|
|
void invert_polygon(unsigned start, unsigned end);
|
|
|
|
VertexContainer m_vertices;
|
|
unsigned m_iterator;
|
|
};
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
unsigned path_base<VC>::start_new_path()
|
|
{
|
|
if(!is_stop(m_vertices.last_command()))
|
|
{
|
|
m_vertices.add_vertex(0.0, 0.0, path_cmd_stop);
|
|
}
|
|
return m_vertices.total_vertices();
|
|
}
|
|
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
inline void path_base<VC>::rel_to_abs(double* x, double* y) const
|
|
{
|
|
if(m_vertices.total_vertices())
|
|
{
|
|
double x2;
|
|
double y2;
|
|
if(is_vertex(m_vertices.last_vertex(&x2, &y2)))
|
|
{
|
|
*x += x2;
|
|
*y += y2;
|
|
}
|
|
}
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
inline void path_base<VC>::move_to(double x, double y)
|
|
{
|
|
m_vertices.add_vertex(x, y, path_cmd_move_to);
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
inline void path_base<VC>::move_rel(double dx, double dy)
|
|
{
|
|
rel_to_abs(&dx, &dy);
|
|
m_vertices.add_vertex(dx, dy, path_cmd_move_to);
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
inline void path_base<VC>::line_to(double x, double y)
|
|
{
|
|
m_vertices.add_vertex(x, y, path_cmd_line_to);
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
inline void path_base<VC>::line_rel(double dx, double dy)
|
|
{
|
|
rel_to_abs(&dx, &dy);
|
|
m_vertices.add_vertex(dx, dy, path_cmd_line_to);
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
inline void path_base<VC>::hline_to(double x)
|
|
{
|
|
m_vertices.add_vertex(x, last_y(), path_cmd_line_to);
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
inline void path_base<VC>::hline_rel(double dx)
|
|
{
|
|
double dy = 0;
|
|
rel_to_abs(&dx, &dy);
|
|
m_vertices.add_vertex(dx, dy, path_cmd_line_to);
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
inline void path_base<VC>::vline_to(double y)
|
|
{
|
|
m_vertices.add_vertex(last_x(), y, path_cmd_line_to);
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
inline void path_base<VC>::vline_rel(double dy)
|
|
{
|
|
double dx = 0;
|
|
rel_to_abs(&dx, &dy);
|
|
m_vertices.add_vertex(dx, dy, path_cmd_line_to);
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
void path_base<VC>::arc_to(double rx, double ry,
|
|
double angle,
|
|
bool large_arc_flag,
|
|
bool sweep_flag,
|
|
double x, double y)
|
|
{
|
|
if(m_vertices.total_vertices() && is_vertex(m_vertices.last_command()))
|
|
{
|
|
const double epsilon = 1e-30;
|
|
double x0 = 0.0;
|
|
double y0 = 0.0;
|
|
m_vertices.last_vertex(&x0, &y0);
|
|
|
|
rx = fabs(rx);
|
|
ry = fabs(ry);
|
|
|
|
// Ensure radii are valid
|
|
//-------------------------
|
|
if(rx < epsilon || ry < epsilon)
|
|
{
|
|
line_to(x, y);
|
|
return;
|
|
}
|
|
|
|
if(calc_distance(x0, y0, x, y) < epsilon)
|
|
{
|
|
// If the endpoints (x, y) and (x0, y0) are identical, then this
|
|
// is equivalent to omitting the elliptical arc segment entirely.
|
|
return;
|
|
}
|
|
bezier_arc_svg a(x0, y0, rx, ry, angle, large_arc_flag, sweep_flag, x, y);
|
|
if(a.radii_ok())
|
|
{
|
|
join_path(a);
|
|
}
|
|
else
|
|
{
|
|
line_to(x, y);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
move_to(x, y);
|
|
}
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
void path_base<VC>::arc_rel(double rx, double ry,
|
|
double angle,
|
|
bool large_arc_flag,
|
|
bool sweep_flag,
|
|
double dx, double dy)
|
|
{
|
|
rel_to_abs(&dx, &dy);
|
|
arc_to(rx, ry, angle, large_arc_flag, sweep_flag, dx, dy);
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
void path_base<VC>::curve3(double x_ctrl, double y_ctrl,
|
|
double x_to, double y_to)
|
|
{
|
|
m_vertices.add_vertex(x_ctrl, y_ctrl, path_cmd_curve3);
|
|
m_vertices.add_vertex(x_to, y_to, path_cmd_curve3);
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
void path_base<VC>::curve3_rel(double dx_ctrl, double dy_ctrl,
|
|
double dx_to, double dy_to)
|
|
{
|
|
rel_to_abs(&dx_ctrl, &dy_ctrl);
|
|
rel_to_abs(&dx_to, &dy_to);
|
|
m_vertices.add_vertex(dx_ctrl, dy_ctrl, path_cmd_curve3);
|
|
m_vertices.add_vertex(dx_to, dy_to, path_cmd_curve3);
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
void path_base<VC>::curve3(double x_to, double y_to)
|
|
{
|
|
double x0;
|
|
double y0;
|
|
if(is_vertex(m_vertices.last_vertex(&x0, &y0)))
|
|
{
|
|
double x_ctrl;
|
|
double y_ctrl;
|
|
unsigned cmd = m_vertices.prev_vertex(&x_ctrl, &y_ctrl);
|
|
if(is_curve(cmd))
|
|
{
|
|
x_ctrl = x0 + x0 - x_ctrl;
|
|
y_ctrl = y0 + y0 - y_ctrl;
|
|
}
|
|
else
|
|
{
|
|
x_ctrl = x0;
|
|
y_ctrl = y0;
|
|
}
|
|
curve3(x_ctrl, y_ctrl, x_to, y_to);
|
|
}
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
void path_base<VC>::curve3_rel(double dx_to, double dy_to)
|
|
{
|
|
rel_to_abs(&dx_to, &dy_to);
|
|
curve3(dx_to, dy_to);
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
void path_base<VC>::curve4(double x_ctrl1, double y_ctrl1,
|
|
double x_ctrl2, double y_ctrl2,
|
|
double x_to, double y_to)
|
|
{
|
|
m_vertices.add_vertex(x_ctrl1, y_ctrl1, path_cmd_curve4);
|
|
m_vertices.add_vertex(x_ctrl2, y_ctrl2, path_cmd_curve4);
|
|
m_vertices.add_vertex(x_to, y_to, path_cmd_curve4);
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
void path_base<VC>::curve4_rel(double dx_ctrl1, double dy_ctrl1,
|
|
double dx_ctrl2, double dy_ctrl2,
|
|
double dx_to, double dy_to)
|
|
{
|
|
rel_to_abs(&dx_ctrl1, &dy_ctrl1);
|
|
rel_to_abs(&dx_ctrl2, &dy_ctrl2);
|
|
rel_to_abs(&dx_to, &dy_to);
|
|
m_vertices.add_vertex(dx_ctrl1, dy_ctrl1, path_cmd_curve4);
|
|
m_vertices.add_vertex(dx_ctrl2, dy_ctrl2, path_cmd_curve4);
|
|
m_vertices.add_vertex(dx_to, dy_to, path_cmd_curve4);
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
void path_base<VC>::curve4(double x_ctrl2, double y_ctrl2,
|
|
double x_to, double y_to)
|
|
{
|
|
double x0;
|
|
double y0;
|
|
if(is_vertex(last_vertex(&x0, &y0)))
|
|
{
|
|
double x_ctrl1;
|
|
double y_ctrl1;
|
|
unsigned cmd = prev_vertex(&x_ctrl1, &y_ctrl1);
|
|
if(is_curve(cmd))
|
|
{
|
|
x_ctrl1 = x0 + x0 - x_ctrl1;
|
|
y_ctrl1 = y0 + y0 - y_ctrl1;
|
|
}
|
|
else
|
|
{
|
|
x_ctrl1 = x0;
|
|
y_ctrl1 = y0;
|
|
}
|
|
curve4(x_ctrl1, y_ctrl1, x_ctrl2, y_ctrl2, x_to, y_to);
|
|
}
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
void path_base<VC>::curve4_rel(double dx_ctrl2, double dy_ctrl2,
|
|
double dx_to, double dy_to)
|
|
{
|
|
rel_to_abs(&dx_ctrl2, &dy_ctrl2);
|
|
rel_to_abs(&dx_to, &dy_to);
|
|
curve4(dx_ctrl2, dy_ctrl2, dx_to, dy_to);
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
inline void path_base<VC>::end_poly(unsigned flags)
|
|
{
|
|
if(is_vertex(m_vertices.last_command()))
|
|
{
|
|
m_vertices.add_vertex(0.0, 0.0, path_cmd_end_poly | flags);
|
|
}
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
inline void path_base<VC>::close_polygon(unsigned flags)
|
|
{
|
|
end_poly(path_flags_close | flags);
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
inline unsigned path_base<VC>::total_vertices() const
|
|
{
|
|
return m_vertices.total_vertices();
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
inline unsigned path_base<VC>::last_vertex(double* x, double* y) const
|
|
{
|
|
return m_vertices.last_vertex(x, y);
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
inline unsigned path_base<VC>::prev_vertex(double* x, double* y) const
|
|
{
|
|
return m_vertices.prev_vertex(x, y);
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
inline double path_base<VC>::last_x() const
|
|
{
|
|
return m_vertices.last_x();
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
inline double path_base<VC>::last_y() const
|
|
{
|
|
return m_vertices.last_y();
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
inline unsigned path_base<VC>::vertex(unsigned idx, double* x, double* y) const
|
|
{
|
|
return m_vertices.vertex(idx, x, y);
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
inline unsigned path_base<VC>::command(unsigned idx) const
|
|
{
|
|
return m_vertices.command(idx);
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
void path_base<VC>::modify_vertex(unsigned idx, double x, double y)
|
|
{
|
|
m_vertices.modify_vertex(idx, x, y);
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
void path_base<VC>::modify_vertex(unsigned idx, double x, double y, unsigned cmd)
|
|
{
|
|
m_vertices.modify_vertex(idx, x, y, cmd);
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
void path_base<VC>::modify_command(unsigned idx, unsigned cmd)
|
|
{
|
|
m_vertices.modify_command(idx, cmd);
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
inline void path_base<VC>::rewind(unsigned path_id)
|
|
{
|
|
m_iterator = path_id;
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
inline unsigned path_base<VC>::vertex(double* x, double* y)
|
|
{
|
|
if(m_iterator >= m_vertices.total_vertices()) return path_cmd_stop;
|
|
return m_vertices.vertex(m_iterator++, x, y);
|
|
}
|
|
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
unsigned path_base<VC>::perceive_polygon_orientation(unsigned start,
|
|
unsigned end)
|
|
{
|
|
// Calculate signed area (double area to be exact)
|
|
//---------------------
|
|
unsigned np = end - start;
|
|
double area = 0.0;
|
|
unsigned i;
|
|
for(i = 0; i < np; i++)
|
|
{
|
|
double x1, y1, x2, y2;
|
|
m_vertices.vertex(start + i, &x1, &y1);
|
|
m_vertices.vertex(start + (i + 1) % np, &x2, &y2);
|
|
area += x1 * y2 - y1 * x2;
|
|
}
|
|
return (area < 0.0) ? path_flags_cw : path_flags_ccw;
|
|
}
|
|
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
void path_base<VC>::invert_polygon(unsigned start, unsigned end)
|
|
{
|
|
unsigned i;
|
|
unsigned tmp_cmd = m_vertices.command(start);
|
|
|
|
--end; // Make "end" inclusive
|
|
|
|
// Shift all commands to one position
|
|
for(i = start; i < end; i++)
|
|
{
|
|
m_vertices.modify_command(i, m_vertices.command(i + 1));
|
|
}
|
|
|
|
// Assign starting command to the ending command
|
|
m_vertices.modify_command(end, tmp_cmd);
|
|
|
|
// Reverse the polygon
|
|
while(end > start)
|
|
{
|
|
m_vertices.swap_vertices(start++, end--);
|
|
}
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
void path_base<VC>::invert_polygon(unsigned start)
|
|
{
|
|
// Skip all non-vertices at the beginning
|
|
while(start < m_vertices.total_vertices() &&
|
|
!is_vertex(m_vertices.command(start))) ++start;
|
|
|
|
// Skip all insignificant move_to
|
|
while(start+1 < m_vertices.total_vertices() &&
|
|
is_move_to(m_vertices.command(start)) &&
|
|
is_move_to(m_vertices.command(start+1))) ++start;
|
|
|
|
// Find the last vertex
|
|
unsigned end = start + 1;
|
|
while(end < m_vertices.total_vertices() &&
|
|
!is_next_poly(m_vertices.command(end))) ++end;
|
|
|
|
invert_polygon(start, end);
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
unsigned path_base<VC>::arrange_polygon_orientation(unsigned start,
|
|
path_flags_e orientation)
|
|
{
|
|
if(orientation == path_flags_none) return start;
|
|
|
|
// Skip all non-vertices at the beginning
|
|
while(start < m_vertices.total_vertices() &&
|
|
!is_vertex(m_vertices.command(start))) ++start;
|
|
|
|
// Skip all insignificant move_to
|
|
while(start+1 < m_vertices.total_vertices() &&
|
|
is_move_to(m_vertices.command(start)) &&
|
|
is_move_to(m_vertices.command(start+1))) ++start;
|
|
|
|
// Find the last vertex
|
|
unsigned end = start + 1;
|
|
while(end < m_vertices.total_vertices() &&
|
|
!is_next_poly(m_vertices.command(end))) ++end;
|
|
|
|
if(end - start > 2)
|
|
{
|
|
if(perceive_polygon_orientation(start, end) != unsigned(orientation))
|
|
{
|
|
// Invert polygon, set orientation flag, and skip all end_poly
|
|
invert_polygon(start, end);
|
|
unsigned cmd;
|
|
while(end < m_vertices.total_vertices() &&
|
|
is_end_poly(cmd = m_vertices.command(end)))
|
|
{
|
|
m_vertices.modify_command(end++, set_orientation(cmd, orientation));
|
|
}
|
|
}
|
|
}
|
|
return end;
|
|
}
|
|
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
unsigned path_base<VC>::arrange_orientations(unsigned start,
|
|
path_flags_e orientation)
|
|
{
|
|
if(orientation != path_flags_none)
|
|
{
|
|
while(start < m_vertices.total_vertices())
|
|
{
|
|
start = arrange_polygon_orientation(start, orientation);
|
|
if(is_stop(m_vertices.command(start)))
|
|
{
|
|
++start;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return start;
|
|
}
|
|
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
void path_base<VC>::arrange_orientations_all_paths(path_flags_e orientation)
|
|
{
|
|
if(orientation != path_flags_none)
|
|
{
|
|
unsigned start = 0;
|
|
while(start < m_vertices.total_vertices())
|
|
{
|
|
start = arrange_orientations(start, orientation);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
void path_base<VC>::flip_x(double x1, double x2)
|
|
{
|
|
unsigned i;
|
|
double x, y;
|
|
for(i = 0; i < m_vertices.total_vertices(); i++)
|
|
{
|
|
unsigned cmd = m_vertices.vertex(i, &x, &y);
|
|
if(is_vertex(cmd))
|
|
{
|
|
m_vertices.modify_vertex(i, x2 - x + x1, y);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class VC>
|
|
void path_base<VC>::flip_y(double y1, double y2)
|
|
{
|
|
unsigned i;
|
|
double x, y;
|
|
for(i = 0; i < m_vertices.total_vertices(); i++)
|
|
{
|
|
unsigned cmd = m_vertices.vertex(i, &x, &y);
|
|
if(is_vertex(cmd))
|
|
{
|
|
m_vertices.modify_vertex(i, x, y2 - y + y1);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
//-----------------------------------------------------vertex_stl_storage
|
|
template<class Container> class vertex_stl_storage
|
|
{
|
|
public:
|
|
typedef typename Container::value_type vertex_type;
|
|
typedef typename vertex_type::value_type value_type;
|
|
|
|
void remove_all() { m_vertices.clear(); }
|
|
void free_all() { m_vertices.clear(); }
|
|
|
|
void add_vertex(double x, double y, unsigned cmd)
|
|
{
|
|
m_vertices.push_back(vertex_type(value_type(x),
|
|
value_type(y),
|
|
int8u(cmd)));
|
|
}
|
|
|
|
void modify_vertex(unsigned idx, double x, double y)
|
|
{
|
|
vertex_type& v = m_vertices[idx];
|
|
v.x = value_type(x);
|
|
v.y = value_type(y);
|
|
}
|
|
|
|
void modify_vertex(unsigned idx, double x, double y, unsigned cmd)
|
|
{
|
|
vertex_type& v = m_vertices[idx];
|
|
v.x = value_type(x);
|
|
v.y = value_type(y);
|
|
v.cmd = int8u(cmd);
|
|
}
|
|
|
|
void modify_command(unsigned idx, unsigned cmd)
|
|
{
|
|
m_vertices[idx].cmd = int8u(cmd);
|
|
}
|
|
|
|
void swap_vertices(unsigned v1, unsigned v2)
|
|
{
|
|
vertex_type t = m_vertices[v1];
|
|
m_vertices[v1] = m_vertices[v2];
|
|
m_vertices[v2] = t;
|
|
}
|
|
|
|
unsigned last_command() const
|
|
{
|
|
return m_vertices.size() ?
|
|
m_vertices[m_vertices.size() - 1].cmd :
|
|
path_cmd_stop;
|
|
}
|
|
|
|
unsigned last_vertex(double* x, double* y) const
|
|
{
|
|
if(m_vertices.size() == 0)
|
|
{
|
|
*x = *y = 0.0;
|
|
return path_cmd_stop;
|
|
}
|
|
return vertex(m_vertices.size() - 1, x, y);
|
|
}
|
|
|
|
unsigned prev_vertex(double* x, double* y) const
|
|
{
|
|
if(m_vertices.size() < 2)
|
|
{
|
|
*x = *y = 0.0;
|
|
return path_cmd_stop;
|
|
}
|
|
return vertex(m_vertices.size() - 2, x, y);
|
|
}
|
|
|
|
double last_x() const
|
|
{
|
|
return m_vertices.size() ? m_vertices[m_vertices.size() - 1].x : 0.0;
|
|
}
|
|
|
|
double last_y() const
|
|
{
|
|
return m_vertices.size() ? m_vertices[m_vertices.size() - 1].y : 0.0;
|
|
}
|
|
|
|
unsigned total_vertices() const
|
|
{
|
|
return m_vertices.size();
|
|
}
|
|
|
|
unsigned vertex(unsigned idx, double* x, double* y) const
|
|
{
|
|
const vertex_type& v = m_vertices[idx];
|
|
*x = v.x;
|
|
*y = v.y;
|
|
return v.cmd;
|
|
}
|
|
|
|
unsigned command(unsigned idx) const
|
|
{
|
|
return m_vertices[idx].cmd;
|
|
}
|
|
|
|
private:
|
|
Container m_vertices;
|
|
};
|
|
|
|
//-----------------------------------------------------------path_storage
|
|
typedef path_base<vertex_block_storage<double> > path_storage;
|
|
|
|
// Example of declarations path_storage with pod_bvector as a container
|
|
//-----------------------------------------------------------------------
|
|
//typedef path_base<vertex_stl_storage<pod_bvector<vertex_d> > > path_storage;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Example of declarations path_storage with std::vector as a container
|
|
//---------------------------------------------------------------------------
|
|
//#include <vector>
|
|
//namespace agg
|
|
//{
|
|
// typedef path_base<vertex_stl_storage<std::vector<vertex_d> > > stl_path_storage;
|
|
//}
|
|
|
|
|
|
|
|
|
|
#endif
|