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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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| 41 | #include "cairo-types-private.h" |
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| 42 | |||
| 43 | #include "cairo-freelist-private.h" |
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| 44 | #include "cairo-list-private.h" |
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| 45 | |||
| 46 | enum { |
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| 47 | CAIRO_RTREE_NODE_AVAILABLE, |
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| 48 | CAIRO_RTREE_NODE_DIVIDED, |
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| 49 | CAIRO_RTREE_NODE_OCCUPIED, |
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| 50 | }; |
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| 51 | |||
| 52 | typedef struct _cairo_rtree_node { |
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| 53 | struct _cairo_rtree_node *children[4], *parent; |
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| 54 | void **owner; |
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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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| 68 | cairo_freepool_t node_freepool; |
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| 69 | } cairo_rtree_t; |
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| 70 | |||
| 71 | cairo_private cairo_rtree_node_t * |
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| 72 | _cairo_rtree_node_create (cairo_rtree_t *rtree, |
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| 73 | cairo_rtree_node_t *parent, |
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| 74 | int x, |
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| 75 | int y, |
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| 76 | int width, |
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| 77 | int height); |
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| 78 | |||
| 79 | cairo_private cairo_status_t |
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| 80 | _cairo_rtree_node_insert (cairo_rtree_t *rtree, |
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| 81 | cairo_rtree_node_t *node, |
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| 82 | int width, |
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| 83 | int height, |
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| 84 | cairo_rtree_node_t **out); |
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| 85 | |||
| 86 | cairo_private void |
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| 87 | _cairo_rtree_node_collapse (cairo_rtree_t *rtree, cairo_rtree_node_t *node); |
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| 88 | |||
| 89 | cairo_private void |
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| 90 | _cairo_rtree_node_remove (cairo_rtree_t *rtree, cairo_rtree_node_t *node); |
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| 91 | |||
| 92 | cairo_private void |
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| 93 | _cairo_rtree_node_destroy (cairo_rtree_t *rtree, cairo_rtree_node_t *node); |
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| 94 | |||
| 95 | cairo_private void |
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| 96 | _cairo_rtree_init (cairo_rtree_t *rtree, |
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| 97 | int width, |
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| 98 | int height, |
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| 99 | int min_size, |
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| 100 | int node_size); |
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| 101 | |||
| 102 | cairo_private cairo_int_status_t |
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| 103 | _cairo_rtree_insert (cairo_rtree_t *rtree, |
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| 104 | int width, |
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| 105 | int height, |
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| 106 | cairo_rtree_node_t **out); |
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| 107 | |||
| 108 | cairo_private cairo_int_status_t |
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| 109 | _cairo_rtree_evict_random (cairo_rtree_t *rtree, |
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| 110 | int width, |
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| 111 | int height, |
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| 112 | cairo_rtree_node_t **out); |
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| 113 | |||
| 114 | static inline void * |
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| 115 | _cairo_rtree_pin (cairo_rtree_t *rtree, cairo_rtree_node_t *node) |
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| 116 | { |
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| 117 | if (! node->pinned) { |
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| 118 | cairo_list_move (&node->link, &rtree->pinned); |
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| 119 | node->pinned = 1; |
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| 120 | } |
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| 121 | |||
| 122 | return node; |
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| 123 | } |
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| 124 | |||
| 125 | cairo_private void |
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| 126 | _cairo_rtree_unpin (cairo_rtree_t *rtree); |
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| 127 | |||
| 128 | cairo_private void |
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| 129 | _cairo_rtree_reset (cairo_rtree_t *rtree); |
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| 130 | |||
| 131 | cairo_private void |
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| 132 | _cairo_rtree_fini (cairo_rtree_t *rtree); |
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| 133 | |||
| 134 | #endif /* CAIRO_RTREE_PRIVATE_H */ |