source/libs/cairo/cairo-src/src/cairo-traps-private.h

   1 /* cairo - a vector graphics library with display and print output
   2  *
   3  * Copyright © 2002 University of Southern California
   4  * Copyright © 2005 Red Hat, Inc.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it either under the terms of the GNU Lesser General Public
   8  * License version 2.1 as published by the Free Software Foundation
   9  * (the "LGPL") or, at your option, under the terms of the Mozilla
  10  * Public License Version 1.1 (the "MPL"). If you do not alter this
  11  * notice, a recipient may use your version of this file under either
  12  * the MPL or the LGPL.
  13  *
  14  * You should have received a copy of the LGPL along with this library
  15  * in the file COPYING-LGPL-2.1; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
  17  * You should have received a copy of the MPL along with this library
  18  * in the file COPYING-MPL-1.1
  19  *
  20  * The contents of this file are subject to the Mozilla Public License
  21  * Version 1.1 (the "License"); you may not use this file except in
  22  * compliance with the License. You may obtain a copy of the License at
  23  * http://www.mozilla.org/MPL/
  24  *
  25  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
  26  * OF ANY KIND, either express or implied. See the LGPL or the MPL for
  27  * the specific language governing rights and limitations.
  28  *
  29  * The Original Code is the cairo graphics library.
  30  *
  31  * The Initial Developer of the Original Code is University of Southern
  32  * California.
  33  *
  34  * Contributor(s):
  35  *      Carl D. Worth <cworth@cworth.org>
  36  */
  37
  38 #ifndef CAIRO_TRAPS_PRIVATE_H
  39 #define CAIRO_TRAPS_PRIVATE_H
  40
  41 #include "cairo-compiler-private.h"
  42 #include "cairo-error-private.h"
  43 #include "cairo-types-private.h"
  44
  45 CAIRO_BEGIN_DECLS
  46
  47 struct _cairo_traps {
  48     cairo_status_t status;
  49
  50     cairo_box_t bounds;
  51     const cairo_box_t *limits;
  52     int num_limits;
  53
  54     unsigned int maybe_region : 1; /* hint: 0 implies that it cannot be */
  55     unsigned int has_intersections : 1;
  56     unsigned int is_rectilinear : 1;
  57     unsigned int is_rectangular : 1;
  58
  59     int num_traps;
  60     int traps_size;
  61     cairo_trapezoid_t *traps;
  62     cairo_trapezoid_t  traps_embedded[16];
  63 };
  64
  65 /* cairo-traps.c */
  66 cairo_private void
  67 _cairo_traps_init (cairo_traps_t *traps);
  68
  69 cairo_private void
  70 _cairo_traps_init_with_clip (cairo_traps_t *traps,
  71                              const cairo_clip_t *clip);
  72
  73 cairo_private void
  74 _cairo_traps_limit (cairo_traps_t       *traps,
  75                     const cairo_box_t   *boxes,
  76                     int                  num_boxes);
  77
  78 cairo_private cairo_status_t
  79 _cairo_traps_init_boxes (cairo_traps_t      *traps,
  80                          const cairo_boxes_t *boxes);
  81
  82 cairo_private void
  83 _cairo_traps_clear (cairo_traps_t *traps);
  84
  85 cairo_private void
  86 _cairo_traps_fini (cairo_traps_t *traps);
  87
  88 #define _cairo_traps_status(T) (T)->status
  89
  90 cairo_private void
  91 _cairo_traps_translate (cairo_traps_t *traps, int x, int y);
  92
  93 cairo_private void
  94 _cairo_traps_tessellate_triangle_with_edges (cairo_traps_t *traps,
  95                                              const cairo_point_t t[3],
  96                                              const cairo_point_t edges[4]);
  97
  98 cairo_private void
  99 _cairo_traps_tessellate_convex_quad (cairo_traps_t *traps,
 100                                      const cairo_point_t q[4]);
 101
 102 cairo_private cairo_status_t
 103 _cairo_traps_tessellate_rectangle (cairo_traps_t *traps,
 104                                    const cairo_point_t *top_left,
 105                                    const cairo_point_t *bottom_right);
 106
 107 cairo_private void
 108 _cairo_traps_add_trap (cairo_traps_t *traps,
 109                        cairo_fixed_t top, cairo_fixed_t bottom,
 110                        const cairo_line_t *left,
 111                        const cairo_line_t *right);
 112
 113 cairo_private int
 114 _cairo_traps_contain (const cairo_traps_t *traps,
 115                       double x, double y);
 116
 117 cairo_private void
 118 _cairo_traps_extents (const cairo_traps_t *traps,
 119                       cairo_box_t         *extents);
 120
 121 cairo_private cairo_int_status_t
 122 _cairo_traps_extract_region (cairo_traps_t  *traps,
 123                              cairo_antialias_t antialias,
 124                              cairo_region_t **region);
 125
 126 cairo_private cairo_bool_t
 127 _cairo_traps_to_boxes (cairo_traps_t *traps,
 128                        cairo_antialias_t antialias,
 129                        cairo_boxes_t *boxes);
 130
 131 cairo_private cairo_status_t
 132 _cairo_traps_path (const cairo_traps_t *traps,
 133                    cairo_path_fixed_t  *path);
 134
 135 cairo_private cairo_int_status_t
 136 _cairo_rasterise_polygon_to_traps (cairo_polygon_t                      *polygon,
 137                                    cairo_fill_rule_t                     fill_rule,
 138                                    cairo_antialias_t                     antialias,
 139                                    cairo_traps_t *traps);
 140
 141 CAIRO_END_DECLS
 142
 143 #endif /* CAIRO_TRAPS_PRIVATE_H */