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/* cairo - a vector graphics library with display and print output
*
* Copyright © 2009 Chris Wilson
*
* This library is free software; you can redistribute it and/or
* modify it either under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation
* (the "LGPL") or, at your option, under the terms of the Mozilla
* Public License Version 1.1 (the "MPL"). If you do not alter this
* notice, a recipient may use your version of this file under either
* the MPL or the LGPL.
*
* You should have received a copy of the LGPL along with this library
* in the file COPYING-LGPL-2.1; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
* You should have received a copy of the MPL along with this library
* in the file COPYING-MPL-1.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
* OF ANY KIND, either express or implied. See the LGPL or the MPL for
* the specific language governing rights and limitations.
*
* The Original Code is the cairo graphics library.
*
* The Initial Developer of the Original Code is Chris Wilson.
*
* Contributor(s):
* Chris Wilson <chris@chris-wilson.co.uk>
*
*/
#ifndef CAIRO_RTREE_PRIVATE_H
#define CAIRO_RTREE_PRIVATE_H
#include "cairo-compiler-private.h"
#include "cairo-error-private.h"
#include "cairo-types-private.h"
#include "cairo-freelist-private.h"
#include "cairo-list-inline.h"
enum {
CAIRO_RTREE_NODE_AVAILABLE,
CAIRO_RTREE_NODE_DIVIDED,
CAIRO_RTREE_NODE_OCCUPIED,
};
typedef struct _cairo_rtree_node {
struct _cairo_rtree_node *children[4], *parent;
cairo_list_t link;
uint16_t pinned;
uint16_t state;
uint16_t x, y;
uint16_t width, height;
} cairo_rtree_node_t;
typedef struct _cairo_rtree {
cairo_rtree_node_t root;
int min_size;
cairo_list_t pinned;
cairo_list_t available;
cairo_list_t evictable;
void (*destroy) (cairo_rtree_node_t *);
cairo_freepool_t node_freepool;
} cairo_rtree_t;
cairo_private cairo_rtree_node_t *
_cairo_rtree_node_create (cairo_rtree_t *rtree,
cairo_rtree_node_t *parent,
int x,
int y,
int width,
int height);
cairo_private cairo_status_t
_cairo_rtree_node_insert (cairo_rtree_t *rtree,
cairo_rtree_node_t *node,
int width,
int height,
cairo_rtree_node_t **out);
cairo_private void
_cairo_rtree_node_collapse (cairo_rtree_t *rtree, cairo_rtree_node_t *node);
cairo_private void
_cairo_rtree_node_remove (cairo_rtree_t *rtree, cairo_rtree_node_t *node);
cairo_private void
_cairo_rtree_node_destroy (cairo_rtree_t *rtree, cairo_rtree_node_t *node);
cairo_private void
_cairo_rtree_init (cairo_rtree_t *rtree,
int width,
int height,
int min_size,
int node_size,
void (*destroy)(cairo_rtree_node_t *));
cairo_private cairo_int_status_t
_cairo_rtree_insert (cairo_rtree_t *rtree,
int width,
int height,
cairo_rtree_node_t **out);
cairo_private cairo_int_status_t
_cairo_rtree_evict_random (cairo_rtree_t *rtree,
int width,
int height,
cairo_rtree_node_t **out);
cairo_private void
_cairo_rtree_foreach (cairo_rtree_t *rtree,
void (*func)(cairo_rtree_node_t *, void *data),
void *data);
static inline void *
_cairo_rtree_pin (cairo_rtree_t *rtree, cairo_rtree_node_t *node)
{
assert (node->state == CAIRO_RTREE_NODE_OCCUPIED);
if (! node->pinned) {
cairo_list_move (&node->link, &rtree->pinned);
node->pinned = 1;
}
return node;
}
cairo_private void
_cairo_rtree_unpin (cairo_rtree_t *rtree);
cairo_private void
_cairo_rtree_reset (cairo_rtree_t *rtree);
cairo_private void
_cairo_rtree_fini (cairo_rtree_t *rtree);
#endif /* CAIRO_RTREE_PRIVATE_H */