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| 3959 | Serge | 1 | /* cairo - a vector graphics library with display and print output |
| 2 | * |
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| 3 | * Copyright © 2011 Intel Corporation |
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| 4 | * |
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| 5 | * This library is free software; you can redistribute it and/or |
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| 6 | * modify it either under the terms of the GNU Lesser General Public |
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| 7 | * License version 2.1 as published by the Free Software Foundation |
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| 8 | * (the "LGPL") or, at your option, under the terms of the Mozilla |
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| 9 | * Public License Version 1.1 (the "MPL"). If you do not alter this |
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| 10 | * notice, a recipient may use your version of this file under either |
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| 11 | * the MPL or the LGPL. |
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| 12 | * |
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| 13 | * You should have received a copy of the LGPL along with this library |
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| 14 | * in the file COPYING-LGPL-2.1; if not, write to the Free Software |
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| 15 | * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA |
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| 16 | * You should have received a copy of the MPL along with this library |
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| 17 | * in the file COPYING-MPL-1.1 |
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| 18 | * |
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| 19 | * The contents of this file are subject to the Mozilla Public License |
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| 20 | * Version 1.1 (the "License"); you may not use this file except in |
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| 21 | * compliance with the License. You may obtain a copy of the License at |
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| 22 | * http://www.mozilla.org/MPL/ |
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| 23 | * |
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| 24 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY |
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| 25 | * OF ANY KIND, either express or implied. See the LGPL or the MPL for |
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| 26 | * the specific language governing rights and limitations. |
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| 27 | * |
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| 28 | * The Original Code is the cairo graphics library. |
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| 29 | * |
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| 30 | * The Initial Developer of the Original Code is Intel Corporation |
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| 31 | * |
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| 32 | * Contributor(s): |
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| 33 | * Chris Wilson |
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| 34 | */ |
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| 35 | |||
| 36 | #ifndef CAIRO_CONTOUR_PRIVATE_H |
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| 37 | #define CAIRO_CONTOUR_PRIVATE_H |
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| 38 | |||
| 39 | #include "cairo-types-private.h" |
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| 40 | #include "cairo-compiler-private.h" |
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| 41 | #include "cairo-error-private.h" |
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| 42 | #include "cairo-list-private.h" |
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| 43 | |||
| 44 | #include |
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| 45 | |||
| 46 | CAIRO_BEGIN_DECLS |
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| 47 | |||
| 48 | /* A contour is simply a closed chain of points that divide the infinite plane |
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| 49 | * into inside and outside. Each contour is a simple polygon, that is it |
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| 50 | * contains no holes or self-intersections, but maybe either concave or convex. |
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| 51 | */ |
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| 52 | |||
| 53 | struct _cairo_contour_chain { |
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| 54 | cairo_point_t *points; |
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| 55 | int num_points, size_points; |
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| 56 | struct _cairo_contour_chain *next; |
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| 57 | }; |
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| 58 | |||
| 59 | struct _cairo_contour_iter { |
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| 60 | cairo_point_t *point; |
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| 61 | cairo_contour_chain_t *chain; |
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| 62 | }; |
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| 63 | |||
| 64 | struct _cairo_contour { |
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| 65 | cairo_list_t next; |
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| 66 | int direction; |
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| 67 | cairo_contour_chain_t chain, *tail; |
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| 68 | |||
| 69 | cairo_point_t embedded_points[64]; |
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| 70 | }; |
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| 71 | |||
| 72 | /* Initial definition of a shape is a set of contours (some representing holes) */ |
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| 73 | struct _cairo_shape { |
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| 74 | cairo_list_t contours; |
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| 75 | }; |
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| 76 | |||
| 77 | typedef struct _cairo_shape cairo_shape_t; |
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| 78 | |||
| 79 | #if 0 |
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| 80 | cairo_private cairo_status_t |
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| 81 | _cairo_shape_init_from_polygon (cairo_shape_t *shape, |
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| 82 | const cairo_polygon_t *polygon); |
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| 83 | |||
| 84 | cairo_private cairo_status_t |
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| 85 | _cairo_shape_reduce (cairo_shape_t *shape, double tolerance); |
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| 86 | #endif |
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| 87 | |||
| 88 | cairo_private void |
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| 89 | _cairo_contour_init (cairo_contour_t *contour, |
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| 90 | int direction); |
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| 91 | |||
| 92 | cairo_private cairo_int_status_t |
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| 93 | __cairo_contour_add_point (cairo_contour_t *contour, |
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| 94 | const cairo_point_t *point); |
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| 95 | |||
| 96 | cairo_private void |
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| 97 | _cairo_contour_simplify (cairo_contour_t *contour, double tolerance); |
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| 98 | |||
| 99 | cairo_private void |
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| 100 | _cairo_contour_reverse (cairo_contour_t *contour); |
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| 101 | |||
| 102 | cairo_private cairo_int_status_t |
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| 103 | _cairo_contour_add (cairo_contour_t *dst, |
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| 104 | const cairo_contour_t *src); |
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| 105 | |||
| 106 | cairo_private cairo_int_status_t |
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| 107 | _cairo_contour_add_reversed (cairo_contour_t *dst, |
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| 108 | const cairo_contour_t *src); |
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| 109 | |||
| 110 | cairo_private void |
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| 111 | __cairo_contour_remove_last_chain (cairo_contour_t *contour); |
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| 112 | |||
| 113 | cairo_private void |
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| 114 | _cairo_contour_reset (cairo_contour_t *contour); |
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| 115 | |||
| 116 | cairo_private void |
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| 117 | _cairo_contour_fini (cairo_contour_t *contour); |
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| 118 | |||
| 119 | cairo_private void |
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| 120 | _cairo_debug_print_contour (FILE *file, cairo_contour_t *contour); |
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| 121 | |||
| 122 | CAIRO_END_DECLS |
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| 123 | |||
| 124 | #endif /* CAIRO_CONTOUR_PRIVATE_H */ |