cpml/cpml-segment.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_SEGMENT_H__
  21 #define __CPML_SEGMENT_H__
  22
  23 #include <cairo.h>
  24 #include <cpml/cpml-extents.h>
  25
  26
  27 CAIRO_BEGIN_DECLS
  28
  29
  30 #define cpml_path_is_empty(cpml_path) \
  31     ((cpml_path) == NULL || (cpml_path)->data == NULL || \
  32      (cpml_path)->num_data <= 0)
  33
  34
  35 typedef cairo_path_t CpmlPath;
  36 typedef struct _CpmlSegment CpmlSegment;
  37
  38 struct _CpmlSegment {
  39         CpmlPath          *path;
  40         cairo_path_data_t *data;
  41         int                num_data;
  42 };
  43
  44
  45 cairo_bool_t
  46         cpml_segment_from_cairo         (CpmlSegment            *segment,
  47                                          CpmlPath               *path);
  48 CpmlSegment *
  49         cpml_segment_copy               (CpmlSegment            *segment,
  50                                          const CpmlSegment      *src);
  51
  52 void    cpml_segment_to_cairo           (const CpmlSegment      *segment,
  53                                          cairo_t                *cr);
  54 void    cpml_segment_dump               (const CpmlSegment      *segment);
  55
  56 void    cpml_segment_reset              (CpmlSegment            *segment);
  57 cairo_bool_t
  58         cpml_segment_next               (CpmlSegment            *segment);
  59
  60 double  cpml_segment_get_length         (const CpmlSegment      *segment);
  61 void    cpml_segment_extents            (const CpmlSegment      *segment,
  62                                          CpmlExtents            *extents);
  63 void    cpml_segment_pair_at            (const CpmlSegment      *segment,
  64                                          CpmlPair               *pair,
  65                                          double                  pos);
  66 void    cpml_segment_vector_at          (const CpmlSegment      *segment,
  67                                          CpmlVector             *vector,
  68                                          double                  pos);
  69
  70 void    cpml_segment_reverse            (CpmlSegment            *segment);
  71 void    cpml_segment_transform          (CpmlSegment            *segment,
  72                                          const cairo_matrix_t   *matrix);
  73 int     cpml_segment_intersection       (const CpmlSegment      *segment,
  74                                          const CpmlSegment      *segment2,
  75                                          CpmlPair               *dest,
  76                                          int                     max);
  77 void    cpml_segment_offset             (CpmlSegment            *segment,
  78                                          double                  offset);
  79
  80 CAIRO_END_DECLS
  81
  82
  83 #endif /* __CPML_SEGMENT_H__ */