cpml/cpml-arc.h

   1 /* CPML - Cairo Path Manipulation Library
   2  * Copyright (C) 2008, 2009  Nicola Fontana <ntd at entidi.it>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17  * Boston, MA  02110-1301, USA.
  18  */
  19
  20 #ifndef __CPML_ARC_H__
  21 #define __CPML_ARC_H__
  22
  23 #include <cpml/cpml-primitive.h>
  24 #include <cpml/cpml-macros.h>
  25
  26 #ifndef CAIRO_PATH_ARC_TO
  27 #define CAIRO_PATH_ARC_TO       100
  28 #undef  CAIRO_HAS_ARC_SUPPORT
  29 #else
  30 #define CAIRO_HAS_ARC_SUPPORT   1
  31 #endif
  32
  33
  34 CAIRO_BEGIN_DECLS
  35
  36 int     cpml_arc_type_get_npoints       (void) CPML_GNUC_CONST;
  37 cairo_bool_t
  38         cpml_arc_info                   (const CpmlPrimitive    *arc,
  39                                          CpmlPair               *center,
  40                                          double                 *r,
  41                                          double                 *start,
  42                                          double                 *end);
  43 double  cpml_arc_length                 (const CpmlPrimitive    *arc);
  44 void    cpml_arc_pair_at                (const CpmlPrimitive    *arc,
  45                                          CpmlPair               *pair,
  46                                          double                  pos);
  47 void    cpml_arc_vector_at              (const CpmlPrimitive    *arc,
  48                                          CpmlVector             *vector,
  49                                          double                  pos);
  50 double  cpml_arc_near_pos               (const CpmlPrimitive    *arc,
  51                                          const CpmlPair         *pair);
  52 int     cpml_arc_intersection           (const CpmlPrimitive    *arc,
  53                                          const CpmlPrimitive    *arc2,
  54                                          CpmlPair               *dest,
  55                                          int                     max);
  56 int     cpml_arc_intersection_with_line (const CpmlPrimitive    *arc,
  57                                          const CpmlPrimitive    *line,
  58                                          CpmlPair               *dest,
  59                                          int                     max);
  60 void    cpml_arc_offset                 (CpmlPrimitive          *arc,
  61                                          double                  offset);
  62 void    cpml_arc_to_cairo               (const CpmlPrimitive    *arc,
  63                                          cairo_t                *cr);
  64 void    cpml_arc_to_curves              (const CpmlPrimitive    *arc,
  65                                          CpmlSegment            *segment,
  66                                          int                     n_curves);
  67
  68 CAIRO_END_DECLS
  69
  70
  71 #endif /* __CPML_ARC_H__ */