headers/libs/agg/agg_vcgen_stroke.h

   1 //----------------------------------------------------------------------------
   2 // Anti-Grain Geometry - Version 2.4
   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
  21
  22 namespace agg
  23 {
  24
  25     //============================================================vcgen_stroke
  26     //
  27     // See Implementation agg_vcgen_stroke.cpp
  28     // Stroke generator
  29     //
  30     //------------------------------------------------------------------------
  31     class vcgen_stroke
  32     {
  33         enum status_e
  34         {
  35             initial,
  36             ready,
  37             cap1,
  38             cap2,
  39             outline1,
  40             close_first,
  41             outline2,
  42             out_vertices,
  43             end_poly1,
  44             end_poly2,
  45             stop
  46         };
  47
  48     public:
  49         typedef vertex_sequence<vertex_dist, 6> vertex_storage;
  50         typedef pod_bvector<point_d, 6>         coord_storage;
  51
  52         vcgen_stroke();
  53
  54         void line_cap(line_cap_e lc)     { m_stroker.line_cap(lc); }
  55         void line_join(line_join_e lj)   { m_stroker.line_join(lj); }
  56         void inner_join(inner_join_e ij) { m_stroker.inner_join(ij); }
  57
  58         line_cap_e   line_cap()   const { return m_stroker.line_cap(); }
  59         line_join_e  line_join()  const { return m_stroker.line_join(); }
  60         inner_join_e inner_join() const { return m_stroker.inner_join(); }
  61
  62         void width(double w) { m_stroker.width(w); }
  63         void miter_limit(double ml) { m_stroker.miter_limit(ml); }
  64         void miter_limit_theta(double t) { m_stroker.miter_limit_theta(t); }
  65         void inner_miter_limit(double ml) { m_stroker.inner_miter_limit(ml); }
  66         void approximation_scale(double as) { m_stroker.approximation_scale(as); }
  67
  68         double width() const { return m_stroker.width(); }
  69         double miter_limit() const { return m_stroker.miter_limit(); }
  70         double inner_miter_limit() const { return m_stroker.inner_miter_limit(); }
  71         double approximation_scale() const { return m_stroker.approximation_scale(); }
  72
  73         void shorten(double s) { m_shorten = s; }
  74         double shorten() const { return m_shorten; }
  75
  76         // Vertex Generator Interface
  77         void remove_all();
  78         void add_vertex(double x, double y, unsigned cmd);
  79
  80         // Vertex Source Interface
  81         void     rewind(unsigned path_id);
  82         unsigned vertex(double* x, double* y);
  83
  84     private:
  85         vcgen_stroke(const vcgen_stroke&);
  86         const vcgen_stroke& operator = (const vcgen_stroke&);
  87
  88         math_stroke<coord_storage> m_stroker;
  89         vertex_storage             m_src_vertices;
  90         coord_storage              m_out_vertices;
  91         double                     m_shorten;
  92         unsigned                   m_closed;
  93         status_e                   m_status;
  94         status_e                   m_prev_status;
  95         unsigned                   m_src_vertex;
  96         unsigned                   m_out_vertex;
  97     };
  98
  99
 100 }
 101
 102 #endif