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//----------------------------------------------------------------------------
// Anti-Grain Geometry - Version 2.3
// Copyright (C) 2002-2005 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
//----------------------------------------------------------------------------
//
// Line dash generator
//
//----------------------------------------------------------------------------
#ifndef AGG_VCGEN_DASH_INCLUDED
#define AGG_VCGEN_DASH_INCLUDED
#include "agg_basics.h"
#include "agg_vertex_sequence.h"
#include "agg_vertex_iterator.h"
namespace agg
{
//---------------------------------------------------------------vcgen_dash
//
// See Implementation agg_vcgen_dash.cpp
//
class vcgen_dash
{
enum
{
max_dashes = 32
};
enum status_e
{
initial,
ready,
polyline,
stop
};
public:
typedef vertex_sequence<vertex_dist, 6> vertex_storage;
vcgen_dash();
void remove_all_dashes();
void add_dash(double dash_len, double gap_len);
void dash_start(double ds);
void shorten(double s) { m_shorten = s; }
double shorten() const { return m_shorten; }
// Vertex Generator Interface
void remove_all();
void add_vertex(double x, double y, unsigned cmd);
// Vertex Source Interface
void rewind(unsigned id);
unsigned vertex(double* x, double* y);
typedef vcgen_dash source_type;
typedef vertex_iterator<source_type> iterator;
iterator begin(unsigned id) { return iterator(*this, id); }
iterator end() { return iterator(path_cmd_stop); }
private:
vcgen_dash(const vcgen_dash&);
const vcgen_dash& operator = (const vcgen_dash&);
void calc_dash_start(double ds);
double m_dashes[max_dashes];
double m_total_dash_len;
unsigned m_num_dashes;
double m_dash_start;
double m_shorten;
double m_curr_dash_start;
unsigned m_curr_dash;
double m_curr_rest;
const vertex_dist* m_v1;
const vertex_dist* m_v2;
vertex_storage m_src_vertices;
unsigned m_closed;
status_e m_status;
unsigned m_src_vertex;
};
}
#endif
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