agg/inc/agg_vcgen_contour.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_CONTOUR_INCLUDED
  17 #define AGG_VCGEN_CONTOUR_INCLUDED
  18
  19 #include "agg_math_stroke.h"
  20 #include "agg_vertex_iterator.h"
  21
  22 namespace agg
  23 {
  24
  25     //----------------------------------------------------------vcgen_contour
  26     //
  27     // See Implementation agg_vcgen_contour.cpp
  28     //
  29     class vcgen_contour
  30     {
  31         enum status_e
  32         {
  33             initial,
  34             ready,
  35             outline,
  36             out_vertices,
  37             end_poly,
  38             stop
  39         };
  40
  41     public:
  42         typedef vertex_sequence<vertex_dist, 6> vertex_storage;
  43         typedef pod_deque<point_type, 6>        coord_storage;
  44
  45         vcgen_contour();
  46
  47         void line_join(line_join_e lj) { m_line_join = lj; }
  48         void inner_line_join(line_join_e lj) { m_inner_line_join = lj; }
  49         void width(double w) { m_width = w * 0.5; }
  50         void miter_limit(double ml) { m_miter_limit = ml; }
  51         void miter_limit_theta(double t);
  52         void inner_miter_limit(double ml) { m_inner_miter_limit = ml; }
  53         void approximation_scale(double as) { m_approx_scale = as; }
  54         void auto_detect_orientation(bool v) { m_auto_detect = v; }
  55
  56         line_join_e line_join() const { return m_line_join; }
  57         line_join_e inner_line_join() const { return m_inner_line_join; }
  58         double width() const { return m_width * 2.0; }
  59         double miter_limit() const { return m_miter_limit; }
  60         double inner_miter_limit() const { return m_inner_miter_limit; }
  61         double approximation_scale() const { return m_approx_scale; }
  62         bool   auto_detect_orientation() const { return m_auto_detect; }
  63
  64         // Generator interface
  65         void remove_all();
  66         void add_vertex(double x, double y, unsigned cmd);
  67
  68         // Vertex Source Interface
  69         void     rewind(unsigned id);
  70         unsigned vertex(double* x, double* y);
  71
  72     private:
  73         vcgen_contour(const vcgen_contour&);
  74         const vcgen_contour& operator = (const vcgen_contour&);
  75
  76         vertex_storage m_src_vertices;
  77         coord_storage  m_out_vertices;
  78         double         m_width;
  79         line_join_e    m_line_join;
  80         line_join_e    m_inner_line_join;
  81         double         m_approx_scale;
  82         double         m_abs_width;
  83         double         m_signed_width;
  84         double         m_miter_limit;
  85         double         m_inner_miter_limit;
  86         status_e       m_status;
  87         unsigned       m_src_vertex;
  88         unsigned       m_out_vertex;
  89         unsigned       m_closed;
  90         unsigned       m_orientation;
  91         bool           m_auto_detect;
  92     };
  93
  94 }
  95
  96 #endif