agg/inc/agg_vcgen_stroke.h

   1 //----------------------------------------------------------------------------
   2 // Anti-Grain Geometry - Version 2.3
   3 // Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
   4 //
   5 // Permission to copy, use, modify, sell and distribute this software
   6 // is granted provided this copyright notice appears in all copies.
   7 // This software is provided "as is" without express or implied
   8 // warranty, and with no claim as to its suitability for any purpose.
   9 //
  10 //----------------------------------------------------------------------------
  11 // Contact: mcseem@antigrain.com
  12 //          mcseemagg@yahoo.com
  13 //          http://www.antigrain.com
  14 //----------------------------------------------------------------------------
  15
  16 #ifndef AGG_VCGEN_STROKE_INCLUDED
  17 #define AGG_VCGEN_STROKE_INCLUDED
  18
  19 #include "agg_math_stroke.h"
  20 #include "agg_vertex_iterator.h"
  21
  22
  23 namespace agg
  24 {
  25
  26     //============================================================vcgen_stroke
  27     //
  28     // See Implementation agg_vcgen_stroke.cpp
  29     // Stroke generator
  30     //
  31     //------------------------------------------------------------------------
  32     class vcgen_stroke
  33     {
  34         enum status_e
  35         {
  36             initial,
  37             ready,
  38             cap1,
  39             cap2,
  40             outline1,
  41             close_first,
  42             outline2,
  43             out_vertices,
  44             end_poly1,
  45             end_poly2,
  46             stop
  47         };
  48
  49     public:
  50         typedef vertex_sequence<vertex_dist, 6> vertex_storage;
  51         typedef pod_deque<point_type, 6>        coord_storage;
  52
  53         vcgen_stroke();
  54
  55         void line_cap(line_cap_e lc) { m_line_cap = lc; }
  56         void line_join(line_join_e lj) { m_line_join = lj; }
  57         void inner_line_join(line_join_e lj) { m_inner_line_join = lj; }
  58
  59         line_cap_e line_cap() const { return m_line_cap; }
  60         line_join_e line_join() const { return m_line_join; }
  61         line_join_e inner_line_join() const { return m_inner_line_join; }
  62
  63         void width(double w) { m_width = w * 0.5; }
  64         void miter_limit(double ml) { m_miter_limit = ml; }
  65         void miter_limit_theta(double t);
  66         void inner_miter_limit(double ml) { m_inner_miter_limit = ml; }
  67         void approximation_scale(double as) { m_approx_scale = as; }
  68
  69         double width() const { return m_width * 2.0; }
  70         double miter_limit() const { return m_miter_limit; }
  71         double inner_miter_limit() const { return m_inner_miter_limit; }
  72         double approximation_scale() const { return m_approx_scale; }
  73
  74         void shorten(double s) { m_shorten = s; }
  75         double shorten() const { return m_shorten; }
  76
  77         // Vertex Generator Interface
  78         void remove_all();
  79         void add_vertex(double x, double y, unsigned cmd);
  80
  81         // Vertex Source Interface
  82         void     rewind(unsigned id);
  83         unsigned vertex(double* x, double* y);
  84
  85         typedef vcgen_stroke source_type;
  86         typedef vertex_iterator<source_type> iterator;
  87         iterator begin(unsigned id) { return iterator(*this, id); }
  88         iterator end() { return iterator(path_cmd_stop); }
  89
  90     private:
  91         vcgen_stroke(const vcgen_stroke&);
  92         const vcgen_stroke& operator = (const vcgen_stroke&);
  93
  94         vertex_storage m_src_vertices;
  95         coord_storage  m_out_vertices;
  96         double         m_width;
  97         double         m_miter_limit;
  98         double         m_inner_miter_limit;
  99         double         m_approx_scale;
 100         double         m_shorten;
 101         line_cap_e     m_line_cap;
 102         line_join_e    m_line_join;
 103         line_join_e    m_inner_line_join;
 104         unsigned       m_closed;
 105         status_e       m_status;
 106         status_e       m_prev_status;
 107         unsigned       m_src_vertex;
 108         unsigned       m_out_vertex;
 109     };
 110
 111
 112 }
 113
 114 #endif