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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef CAIRO_RTREE_PRIVATE_H
#define CAIRO_RTREE_PRIVATE_H
#include "cairo-compiler-private.h"
#include "cairo-types-private.h"
#include "cairo-freelist-private.h"
#include "cairo-list-private.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;
void **owner;
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;
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);
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);
static inline void *
_cairo_rtree_pin (cairo_rtree_t *rtree, cairo_rtree_node_t *node)
{
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 */
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