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1892 | serge | 1 | /* cairo - a vector graphics library with display and print output |
2 | * |
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3 | * Copyright © 2009 Chris Wilson |
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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 Chris Wilson. |
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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 | */ |
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36 | |||
37 | #ifndef CAIRO_RTREE_PRIVATE_H |
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38 | #define CAIRO_RTREE_PRIVATE_H |
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39 | |||
40 | #include "cairo-compiler-private.h" |
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3959 | Serge | 41 | #include "cairo-error-private.h" |
1892 | serge | 42 | #include "cairo-types-private.h" |
43 | |||
44 | #include "cairo-freelist-private.h" |
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3959 | Serge | 45 | #include "cairo-list-inline.h" |
1892 | serge | 46 | |
47 | enum { |
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48 | CAIRO_RTREE_NODE_AVAILABLE, |
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49 | CAIRO_RTREE_NODE_DIVIDED, |
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50 | CAIRO_RTREE_NODE_OCCUPIED, |
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51 | }; |
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52 | |||
53 | typedef struct _cairo_rtree_node { |
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54 | struct _cairo_rtree_node *children[4], *parent; |
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55 | cairo_list_t link; |
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56 | uint16_t pinned; |
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57 | uint16_t state; |
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58 | uint16_t x, y; |
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59 | uint16_t width, height; |
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60 | } cairo_rtree_node_t; |
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61 | |||
62 | typedef struct _cairo_rtree { |
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63 | cairo_rtree_node_t root; |
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64 | int min_size; |
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65 | cairo_list_t pinned; |
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66 | cairo_list_t available; |
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67 | cairo_list_t evictable; |
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3959 | Serge | 68 | void (*destroy) (cairo_rtree_node_t *); |
1892 | serge | 69 | cairo_freepool_t node_freepool; |
70 | } cairo_rtree_t; |
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71 | |||
72 | cairo_private cairo_rtree_node_t * |
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73 | _cairo_rtree_node_create (cairo_rtree_t *rtree, |
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74 | cairo_rtree_node_t *parent, |
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75 | int x, |
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76 | int y, |
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77 | int width, |
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78 | int height); |
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79 | |||
80 | cairo_private cairo_status_t |
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81 | _cairo_rtree_node_insert (cairo_rtree_t *rtree, |
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82 | cairo_rtree_node_t *node, |
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83 | int width, |
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84 | int height, |
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85 | cairo_rtree_node_t **out); |
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86 | |||
87 | cairo_private void |
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88 | _cairo_rtree_node_collapse (cairo_rtree_t *rtree, cairo_rtree_node_t *node); |
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89 | |||
90 | cairo_private void |
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91 | _cairo_rtree_node_remove (cairo_rtree_t *rtree, cairo_rtree_node_t *node); |
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92 | |||
93 | cairo_private void |
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94 | _cairo_rtree_node_destroy (cairo_rtree_t *rtree, cairo_rtree_node_t *node); |
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95 | |||
96 | cairo_private void |
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97 | _cairo_rtree_init (cairo_rtree_t *rtree, |
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98 | int width, |
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99 | int height, |
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100 | int min_size, |
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3959 | Serge | 101 | int node_size, |
102 | void (*destroy)(cairo_rtree_node_t *)); |
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1892 | serge | 103 | |
104 | cairo_private cairo_int_status_t |
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105 | _cairo_rtree_insert (cairo_rtree_t *rtree, |
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106 | int width, |
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107 | int height, |
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108 | cairo_rtree_node_t **out); |
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109 | |||
110 | cairo_private cairo_int_status_t |
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111 | _cairo_rtree_evict_random (cairo_rtree_t *rtree, |
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112 | int width, |
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113 | int height, |
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114 | cairo_rtree_node_t **out); |
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115 | |||
3959 | Serge | 116 | cairo_private void |
117 | _cairo_rtree_foreach (cairo_rtree_t *rtree, |
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118 | void (*func)(cairo_rtree_node_t *, void *data), |
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119 | void *data); |
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120 | |||
1892 | serge | 121 | static inline void * |
122 | _cairo_rtree_pin (cairo_rtree_t *rtree, cairo_rtree_node_t *node) |
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123 | { |
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3959 | Serge | 124 | assert (node->state == CAIRO_RTREE_NODE_OCCUPIED); |
1892 | serge | 125 | if (! node->pinned) { |
126 | cairo_list_move (&node->link, &rtree->pinned); |
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127 | node->pinned = 1; |
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128 | } |
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129 | |||
130 | return node; |
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131 | } |
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132 | |||
133 | cairo_private void |
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134 | _cairo_rtree_unpin (cairo_rtree_t *rtree); |
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135 | |||
136 | cairo_private void |
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137 | _cairo_rtree_reset (cairo_rtree_t *rtree); |
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138 | |||
139 | cairo_private void |
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140 | _cairo_rtree_fini (cairo_rtree_t *rtree); |
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141 | |||
142 | #endif /* CAIRO_RTREE_PRIVATE_H */ |