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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 */