1 files changed, 935 insertions, 0 deletions

diff --git a/libraries/eina/src/lib/eina_quadtree.c b/libraries/eina/src/lib/eina_quadtree.c
new file mode 100644
index 0000000..daf03d0
--- /dev/null
+++ b/libraries/eina/src/lib/eina_quadtree.c
@@ -0,0 +1,935 @@
+/* EINA - EFL data type library
+ * Copyright (C) 2010 Cedric Bail
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library;
+ * if not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @page tutorial_quadtree_page QuadTree Tutorial
+ *
+ * to be written...
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#ifdef HAVE_EVIL
+# include <Evil.h>
+#endif
+
+#include "eina_quadtree.h"
+#include "eina_magic.h"
+#include "eina_mempool.h"
+#include "eina_list.h"
+#include "eina_inlist.h"
+#include "eina_trash.h"
+#include "eina_log.h"
+#include "eina_rectangle.h"
+
+#include "eina_private.h"
+
+typedef struct _Eina_QuadTree_Root Eina_QuadTree_Root;
+
+static const char EINA_MAGIC_QUADTREE_STR[] = "Eina QuadTree";
+static const char EINA_MAGIC_QUADTREE_ROOT_STR[] = "Eina QuadTree Root";
+static const char EINA_MAGIC_QUADTREE_ITEM_STR[] = "Eina QuadTree Item";
+
+#define EINA_MAGIC_CHECK_QUADTREE(d, ...)               \
+   do {                                                  \
+        if (!EINA_MAGIC_CHECK(d, EINA_MAGIC_QUADTREE))     \
+          {                                                \
+             EINA_MAGIC_FAIL(d, EINA_MAGIC_QUADTREE);      \
+             return __VA_ARGS__;                           \
+          }                                                \
+     } while(0);
+
+#define EINA_MAGIC_CHECK_QUADTREE_ROOT(d, ...)                  \
+   do {                                                          \
+        if (!EINA_MAGIC_CHECK(d, EINA_MAGIC_QUADTREE_ROOT))        \
+          {                                                        \
+             EINA_MAGIC_FAIL(d, EINA_MAGIC_QUADTREE_ROOT);         \
+             return __VA_ARGS__;                                   \
+          }                                                        \
+     } while(0);
+
+#define EINA_MAGIC_CHECK_QUADTREE_ITEM(d, ...)                  \
+   do {                                                          \
+        if (!EINA_MAGIC_CHECK(d, EINA_MAGIC_QUADTREE_ITEM))        \
+          {                                                        \
+             EINA_MAGIC_FAIL(d, EINA_MAGIC_QUADTREE_ITEM);         \
+             return __VA_ARGS__;                                   \
+          }                                                        \
+     } while(0);
+
+struct _Eina_QuadTree
+{
+   Eina_QuadTree_Root *root;
+
+   Eina_List *hidden;
+
+   size_t root_count;
+   size_t items_count;
+
+   Eina_Trash *items_trash;
+   Eina_Trash *root_trash;
+
+   Eina_Inlist *change;
+   Eina_Inlist *cached;
+   Eina_Rectangle target;
+
+   size_t index;
+
+   struct
+   {
+      Eina_Quad_Callback v;
+      Eina_Quad_Callback h;
+   } func;
+
+   struct
+   {
+      size_t w;
+      size_t h;
+   } geom;
+
+   Eina_Bool resize : 1;
+   Eina_Bool lost : 1;
+
+   EINA_MAGIC
+};
+
+struct _Eina_QuadTree_Root
+{
+   Eina_QuadTree_Root *parent;
+   Eina_QuadTree_Root *left;
+   Eina_QuadTree_Root *right;
+
+   Eina_List *both;
+
+   Eina_Bool sorted : 1;
+
+   EINA_MAGIC
+};
+
+struct _Eina_QuadTree_Item
+{
+   EINA_INLIST;
+
+   Eina_QuadTree *quad;
+   Eina_QuadTree_Root *root;
+
+   const void *object;
+
+   size_t index;
+
+   Eina_Bool change : 1;
+   Eina_Bool delete_me : 1;
+   Eina_Bool visible : 1;
+   Eina_Bool hidden : 1;
+
+   EINA_MAGIC
+};
+
+static int _eina_quadtree_log_dom = -1;
+static Eina_Mempool *eina_quadtree_root_mp = NULL;
+static Eina_Mempool *_eina_quadtree_items_mp = NULL;
+
+#ifdef ERR
+#undef ERR
+#endif
+#define ERR(...) EINA_LOG_DOM_ERR(_eina_quadtree_log_dom, __VA_ARGS__)
+
+#ifdef DBG
+#undef DBG
+#endif
+#define DBG(...) EINA_LOG_DOM_DBG(_eina_quadtree_log_dom, __VA_ARGS__)
+
+
+static int
+_eina_quadtree_item_cmp(const void *a, const void *b)
+{
+   const Eina_QuadTree_Item *i = a;
+   const Eina_QuadTree_Item *j = b;
+
+   return i->index - j->index;
+}
+
+static Eina_QuadTree_Root *
+eina_quadtree_root_free(Eina_QuadTree *q, Eina_QuadTree_Root *root)
+{
+   Eina_QuadTree_Item *item;
+
+   if (!root)
+      return NULL;
+
+   EINA_MAGIC_CHECK_QUADTREE_ROOT(root, NULL);
+
+   EINA_LIST_FREE(root->both, item)
+   eina_mempool_free(_eina_quadtree_items_mp, item);
+
+   root->left = eina_quadtree_root_free(q, root->left);
+   root->right = eina_quadtree_root_free(q, root->right);
+
+   EINA_MAGIC_SET(root, 0);
+   eina_mempool_free(eina_quadtree_root_mp, root);
+
+   return NULL;
+}
+
+static Eina_QuadTree_Root *
+eina_quadtree_root_rebuild_pre(Eina_QuadTree *q,
+                               Eina_Inlist **change,
+                               Eina_QuadTree_Root *root)
+{
+   Eina_QuadTree_Item *item;
+
+   if (!root)
+      return NULL;
+
+   EINA_LIST_FREE(root->both, item)
+   {
+      if (item->visible)
+         *change = eina_inlist_append(*change, EINA_INLIST_GET(item));
+      else if (!item->hidden)
+        {
+           q->hidden = eina_list_append(q->hidden, item);
+           item->hidden = EINA_TRUE;
+           item->root = NULL;
+        }
+   }
+
+   root->left = eina_quadtree_root_rebuild_pre(q, change, root->left);
+   root->right = eina_quadtree_root_rebuild_pre(q, change, root->right);
+
+   EINA_MAGIC_SET(root, 0);
+   if (q->root_count > 50)
+      eina_mempool_free(eina_quadtree_root_mp, root);
+   else
+     {
+        eina_trash_push(&q->root_trash, root);
+        q->root_count++;
+     }
+
+   return NULL;
+}
+
+static size_t
+_eina_quadtree_split(Eina_Inlist *objects,
+                     Eina_QuadTree_Root *root,
+                     Eina_Inlist **left,
+                     Eina_Inlist **right,
+                     Eina_Quad_Callback func,
+                     int border,
+                     int middle)
+{
+   Eina_QuadTree_Item *object;
+
+   middle /= 2;
+
+   if (middle <= 4)
+      while (objects)
+        {
+           object = EINA_INLIST_CONTAINER_GET(objects, Eina_QuadTree_Item);
+           objects = objects->next;
+
+           object->change = EINA_FALSE;
+           if (!object->visible)
+             {
+                if (!object->hidden)
+                  {
+                     object->hidden = EINA_TRUE;
+                     object->quad->hidden = eina_list_append(
+                           object->quad->hidden,
+                           object);
+                  }
+
+                continue;
+             }
+
+           if (object->hidden)
+             {
+                object->hidden = EINA_FALSE;
+                object->quad->hidden = eina_list_remove(object->quad->hidden,
+                                                        object);
+             }
+
+           if (!object->delete_me)
+             {
+                if (root->sorted)
+                   root->both = eina_list_sorted_insert(root->both,
+                                                        _eina_quadtree_item_cmp,
+                                                        object);
+                else
+                   root->both = eina_list_append(root->both, object);
+
+                object->root = root;
+             }
+           else
+              eina_quadtree_del(object);
+        }
+   else
+      while (objects)
+        {
+           object = EINA_INLIST_CONTAINER_GET(objects, Eina_QuadTree_Item);
+           objects = objects->next;
+
+           object->change = EINA_FALSE;
+           if (!object->visible)
+             {
+                if (!object->hidden)
+                  {
+                     object->hidden = EINA_TRUE;
+                     object->quad->hidden = eina_list_append(
+                           object->quad->hidden,
+                           object);
+                  }
+
+                continue;
+             }
+
+           if (object->hidden)
+             {
+                object->hidden = EINA_FALSE;
+                object->quad->hidden = eina_list_remove(object->quad->hidden,
+                                                        object);
+             }
+
+           if (!object->delete_me)
+             {
+                switch (func(object->object, border + middle))
+                  {
+                   case EINA_QUAD_LEFT:
+                      *left = eina_inlist_append(*left, EINA_INLIST_GET(object));
+                      break;
+
+                   case EINA_QUAD_RIGHT:
+                      *right =
+                         eina_inlist_append(*right, EINA_INLIST_GET(object));
+                      break;
+
+                   case EINA_QUAD_BOTH:
+                      root->both = eina_list_append(root->both, object);
+                      object->root = root;
+                      break;
+
+                   default:
+                      abort();
+                  }
+             }
+           else
+              eina_quadtree_del(object);
+        }
+
+   return middle;
+}
+
+
+static Eina_QuadTree_Root *
+_eina_quadtree_update(Eina_QuadTree *q, Eina_QuadTree_Root *parent,
+                      Eina_QuadTree_Root *root, Eina_Inlist *objects,
+                      Eina_Bool direction, Eina_Rectangle *size)
+{
+   Eina_Inlist *right = NULL;
+   Eina_Inlist *left = NULL;
+   size_t w2;
+   size_t h2;
+
+   if (!objects)
+      return root;
+
+   if (!root)
+     {
+        root = eina_trash_pop(&q->root_trash);
+        if (!root)
+           root = eina_mempool_malloc(eina_quadtree_root_mp, sizeof (Eina_QuadTree_Root));
+        else
+           q->root_count--;
+
+        if (!root)
+           /* FIXME: NOT GOOD TIMING, WE ARE GOING TO LEAK MORE MEMORY */
+           return NULL;
+
+        root->parent = parent;
+        root->both = NULL;
+        root->left = NULL;
+        root->right = NULL;
+        root->sorted = EINA_TRUE;
+
+        EINA_MAGIC_SET(root, EINA_MAGIC_QUADTREE_ROOT);
+     }
+
+   w2 = 0;
+   h2 = 0;
+
+   if (direction)
+      w2 = _eina_quadtree_split(objects, root,
+                                &left, &right,
+                                q->func.h, size->x, size->w);
+   else
+      h2 = _eina_quadtree_split(objects, root,
+                                &left, &right,
+                                q->func.v, size->y, size->h);
+
+   size->w -= w2; size->h -= h2;
+   root->left = _eina_quadtree_update(q, root,
+                                      root->left, left,
+                                      !direction, size);
+   size->x += w2; size->y += h2;
+   root->right = _eina_quadtree_update(q, root,
+                                       root->right, right,
+                                       !direction, size);
+   size->x -= w2; size->y -= h2;
+   size->w += w2; size->h += h2;
+
+   return root;
+}
+
+static Eina_Inlist *
+_eina_quadtree_merge(Eina_Inlist *result,
+                     Eina_List *both)
+{
+   Eina_QuadTree_Item *item;
+   Eina_QuadTree_Item *b;
+   Eina_Inlist *moving;
+
+   if (!both)
+      return result;
+
+   if (!result)
+     {
+        Eina_List *l;
+
+        EINA_LIST_FOREACH(both, l, item)
+        if (item->visible)
+           result = eina_inlist_append(result, EINA_INLIST_GET(item));
+
+        return result;
+     }
+
+   moving = result;
+
+   item = EINA_INLIST_CONTAINER_GET(moving, Eina_QuadTree_Item);
+   b = eina_list_data_get(both);
+
+   while (both && moving)
+     {
+        if (!b->visible)
+          {
+             both = eina_list_next(both);
+             b = eina_list_data_get(both);
+             continue;
+          }
+
+        if (_eina_quadtree_item_cmp(item, b) < 0)
+          {
+             /* moving is still lower than item, so we can continue to the next one. */
+             moving = moving->next;
+             item = EINA_INLIST_CONTAINER_GET(moving, Eina_QuadTree_Item);
+          }
+        else
+          {
+             /* we just get above the limit of both, so insert it */
+             result = eina_inlist_prepend_relative(result,
+                                                   EINA_INLIST_GET(b),
+                                                   moving);
+             both = eina_list_next(both);
+             b = eina_list_data_get(both);
+          }
+     }
+
+   item = EINA_INLIST_CONTAINER_GET(result->last, Eina_QuadTree_Item);
+
+   while (both)
+     {
+        b = eina_list_data_get(both);
+        if (b->visible)
+          {
+             if (_eina_quadtree_item_cmp(item, b) < 0)
+                break;
+
+             result = eina_inlist_prepend_relative(result,
+                                                   EINA_INLIST_GET(b),
+                                                   result->last);
+          }
+
+        both = eina_list_next(both);
+     }
+
+   while (both)
+     {
+        b = eina_list_data_get(both);
+        if (b->visible)
+           result = eina_inlist_append(result, EINA_INLIST_GET(b));
+
+        both = eina_list_next(both);
+     }
+
+   return result;
+}
+
+static Eina_Inlist *
+_eina_quadtree_collide(Eina_Inlist *result,
+                       Eina_QuadTree_Root *root,
+                       Eina_Bool direction, Eina_Rectangle *size,
+                       Eina_Rectangle *target)
+{
+   if (!root)
+      return result;
+
+   if (!root->sorted)
+     {
+        root->both = eina_list_sort(root->both, -1, _eina_quadtree_item_cmp);
+        root->sorted = EINA_TRUE;
+     }
+
+   result = _eina_quadtree_merge(result, root->both);
+   DBG("%p: %i in both for (%i, %i - %i, %i)",
+       root, eina_list_count(root->both),
+       size->x, size->y, size->w, size->h);
+
+   if (direction)
+     {
+        int middle = size->w / 2;
+
+        size->w -= middle;
+        if (eina_spans_intersect(size->x, size->w, target->x, target->w))
+           result = _eina_quadtree_collide(result, root->left,
+                                           !direction, size,
+                                           target);
+
+        size->x += middle;
+        if (eina_spans_intersect(size->x, size->w, target->x, target->w))
+           result = _eina_quadtree_collide(result, root->right,
+                                           !direction, size,
+                                           target);
+
+        size->x -= middle;
+        size->w += middle;
+     }
+   else
+     {
+        int middle = size->h / 2;
+
+        size->h -= middle;
+        if (eina_spans_intersect(size->y, size->h, target->y, target->h))
+           result = _eina_quadtree_collide(result, root->left,
+                                           !direction, size,
+                                           target);
+
+        size->y += middle;
+        if (eina_spans_intersect(size->y, size->h, target->y, target->h))
+           result = _eina_quadtree_collide(result, root->right,
+                                           !direction, size,
+                                           target);
+
+        size->y -= middle;
+        size->h += middle;
+     }
+
+   return result;
+}
+
+static void
+_eina_quadtree_remove(Eina_QuadTree_Item *object)
+{
+   if (!object->root)
+      return;
+
+   object->root->both = eina_list_remove(object->root->both, object);
+   if (object->root->both)
+      goto end;
+
+   if (object->root->left)
+      goto end;
+
+   if (object->root->right)
+      goto end;
+
+   /* The root is not useful anymore... */
+   if (object->root->parent)
+     {
+        if (object->root->parent->left == object->root)
+           object->root->parent->left = NULL;
+        else
+           object->root->parent->right = NULL;
+
+        object->root->parent = NULL;
+     }
+   else
+      object->quad->root = NULL;
+
+   if (object->quad->root_count > 50)
+      eina_mempool_free(eina_quadtree_root_mp, object->root);
+   else
+     {
+        eina_trash_push(&object->quad->root_trash, object->root);
+        object->quad->root_count++;
+     }
+
+end:
+   object->root = NULL;
+}
+
+EAPI Eina_QuadTree *
+eina_quadtree_new(size_t w, size_t h,
+                  Eina_Quad_Callback vertical, Eina_Quad_Callback horizontal)
+{
+   Eina_QuadTree *result;
+
+   if (!vertical || !horizontal || h == 0 || w == 0)
+      return NULL;
+
+   result = calloc(1, sizeof (Eina_QuadTree));
+   if (!result)
+      return NULL;
+
+   result->func.v = vertical;
+   result->func.h = horizontal;
+
+   result->geom.w = w;
+   result->geom.h = h;
+
+   result->change = NULL;
+
+   result->lost = EINA_TRUE;
+
+   EINA_MAGIC_SET(result, EINA_MAGIC_QUADTREE);
+
+   return result;
+}
+
+EAPI void
+eina_quadtree_free(Eina_QuadTree *q)
+{
+   Eina_QuadTree_Item *item;
+
+   if (!q)
+      return;
+
+   EINA_MAGIC_CHECK_QUADTREE(q);
+
+   while (q->change)
+     {
+        item = EINA_INLIST_CONTAINER_GET(q->change, Eina_QuadTree_Item);
+        q->change = q->change->next;
+        if (!item->hidden)
+           eina_mempool_free(_eina_quadtree_items_mp, item);
+     }
+
+   EINA_LIST_FREE(q->hidden, item)
+   eina_mempool_free(_eina_quadtree_items_mp, item);
+
+   eina_quadtree_root_free(q, q->root);
+
+   while (q->items_trash)
+     {
+        item = eina_trash_pop(&q->items_trash);
+        eina_mempool_free(_eina_quadtree_items_mp, item);
+     }
+
+   while (q->root_trash)
+     {
+        Eina_QuadTree_Root *root;
+
+        root = eina_trash_pop(&q->root_trash);
+        eina_mempool_free(eina_quadtree_root_mp, root);
+     }
+
+        EINA_MAGIC_SET(q, 0);
+   free(q);
+}
+
+EAPI Eina_QuadTree_Item *
+eina_quadtree_add(Eina_QuadTree *q, const void *object)
+{
+   Eina_QuadTree_Item *result;
+
+   EINA_MAGIC_CHECK_QUADTREE(q, NULL);
+
+   if (!object)
+      return NULL;
+
+   result = eina_trash_pop(&q->items_trash);
+   if (!result)
+      result = eina_mempool_malloc(_eina_quadtree_items_mp, sizeof (Eina_QuadTree_Item));
+   else
+      q->items_count--;
+
+   if (!result)
+      return NULL;
+
+   result->quad = q;
+   result->root = NULL;
+   result->object = object;
+
+   result->index = q->index++;
+
+   result->change = EINA_TRUE;
+   result->delete_me = EINA_FALSE;
+   result->visible = EINA_TRUE;
+   result->hidden = EINA_FALSE;
+
+   EINA_MAGIC_SET(result, EINA_MAGIC_QUADTREE_ITEM);
+
+   /* Insertion is delayed until we really need to use it */
+   q->change = eina_inlist_append(q->change, EINA_INLIST_GET(result));
+
+   return result;
+}
+
+EAPI Eina_Bool
+eina_quadtree_del(Eina_QuadTree_Item *object)
+{
+   if (!object)
+      return EINA_FALSE;
+
+   EINA_MAGIC_CHECK_QUADTREE_ITEM(object, EINA_FALSE);
+
+   _eina_quadtree_remove(object);
+
+   if (object->change)
+     {
+        /* This object is still in the update array, delaying it's removal !*/
+        object->delete_me = EINA_TRUE;
+        object->visible = EINA_TRUE;
+        return EINA_TRUE;
+     }
+
+   if (object->hidden)
+     {
+        object->quad->hidden = eina_list_remove(object->quad->hidden, object);
+        object->hidden = EINA_TRUE;
+     }
+
+   /* This object is not anymore inside the tree, we can remove it now !*/
+   EINA_MAGIC_SET(object, 0);
+   if (object->quad->items_count > 256)
+      eina_mempool_free(_eina_quadtree_items_mp, object);
+   else
+     {
+        object->quad->items_count++;
+        eina_trash_push(&object->quad->items_trash, object);
+     }
+
+   return EINA_TRUE;
+}
+
+EAPI Eina_Bool
+eina_quadtree_change(Eina_QuadTree_Item *object)
+{
+   EINA_MAGIC_CHECK_QUADTREE_ITEM(object, EINA_FALSE);
+
+   if (object->delete_me || !object->visible)
+      return EINA_FALSE;
+
+   if (object->quad->resize)
+      return EINA_TRUE;
+
+   /* Delaying change until needed */
+   if (!object->change)
+      object->quad->change = eina_inlist_append(object->quad->change,
+                                                EINA_INLIST_GET(object));
+
+   object->change = EINA_TRUE;
+
+   _eina_quadtree_remove(object);
+
+   return EINA_TRUE;
+}
+
+EAPI Eina_Bool
+eina_quadtree_hide(Eina_QuadTree_Item *object)
+{
+   EINA_MAGIC_CHECK_QUADTREE_ITEM(object, EINA_FALSE);
+
+   object->visible = EINA_FALSE;
+
+   return EINA_TRUE;
+}
+
+EAPI Eina_Bool
+eina_quadtree_show(Eina_QuadTree_Item *object)
+{
+   EINA_MAGIC_CHECK_QUADTREE_ITEM(object, EINA_FALSE);
+
+   object->quad->lost = EINA_TRUE;
+
+   if (object->visible)
+      return EINA_TRUE;
+
+   object->visible = EINA_TRUE;
+   if (!object->change)
+      return eina_quadtree_change(object);
+
+   return EINA_TRUE;
+}
+
+EAPI Eina_Inlist *
+eina_quadtree_collide(Eina_QuadTree *q, int x, int y, int w, int h)
+{
+   Eina_Rectangle canvas;
+
+   EINA_MAGIC_CHECK_QUADTREE(q, NULL);
+
+   /* Now we need the tree to be up to date, so it's time */
+   if (q->resize) /* Full rebuild needed ! */
+     {
+        DBG("resizing quadtree");
+        q->root = eina_quadtree_root_rebuild_pre(q, &q->change, q->root);
+        q->resize = EINA_FALSE;
+     }
+
+   EINA_RECTANGLE_SET(&canvas, 0, 0, q->geom.w, q->geom.h);
+
+   if (q->change)
+     {
+        DBG("updating quadtree content");
+        q->root = _eina_quadtree_update(q, NULL, q->root, q->change,
+                                        EINA_FALSE, &canvas);
+        q->change = NULL;
+        q->lost = EINA_TRUE;
+     }
+
+   if (q->target.x != x
+       || q->target.y != y
+       || q->target.w != w
+       || q->target.h != h)
+     {
+        DBG("new target");
+        EINA_RECTANGLE_SET(&q->target, x, y, w, h);
+        q->lost = EINA_TRUE;
+     }
+
+   if (q->lost)
+     {
+        DBG("computing collide");
+        q->cached = _eina_quadtree_collide(NULL, q->root,
+                                           EINA_FALSE, &canvas,
+                                           &q->target);
+        q->lost = EINA_FALSE;
+     }
+
+   return q->cached;
+}
+
+EAPI void *
+eina_quadtree_object(Eina_Inlist *item)
+{
+   Eina_QuadTree_Item *qi;
+
+   if (!item)
+      return NULL;
+
+   qi = EINA_INLIST_CONTAINER_GET(item, Eina_QuadTree_Item);
+   if (!qi)
+      return NULL;
+
+   EINA_MAGIC_CHECK_QUADTREE_ITEM(qi, NULL);
+
+   if (!qi->visible)
+      return NULL;
+
+   return (void *)qi->object;
+}
+
+EAPI void
+eina_quadtree_resize(Eina_QuadTree *q, size_t w, size_t h)
+{
+   EINA_MAGIC_CHECK_QUADTREE(q);
+
+   if (q->geom.w == w
+       && q->geom.h == h)
+      return;
+
+   q->resize = EINA_TRUE;
+   q->geom.w = w;
+   q->geom.h = h;
+}
+
+EAPI void
+eina_quadtree_cycle(Eina_QuadTree *q)
+{
+   EINA_MAGIC_CHECK_QUADTREE(q);
+
+   q->index = 0;
+}
+
+EAPI void
+eina_quadtree_increase(Eina_QuadTree_Item *object)
+{
+   size_t tmp;
+
+   tmp = object->quad->index++;
+   if (object->index == tmp)
+      return;
+
+   object->index = tmp;
+   if (object->root)
+      object->root->sorted = EINA_FALSE;
+}
+
+Eina_Bool
+eina_quadtree_init(void)
+{
+   const char *choice, *tmp;
+
+   _eina_quadtree_log_dom = eina_log_domain_register("eina_quadtree",
+                                                     EINA_LOG_COLOR_DEFAULT);
+   if (_eina_quadtree_log_dom < 0)
+     {
+        EINA_LOG_ERR("Could not register log domain: eina_quadtree");
+        return EINA_FALSE;
+     }
+
+#define EMS(n) eina_magic_string_static_set(n, n ## _STR)
+   EMS(EINA_MAGIC_QUADTREE);
+   EMS(EINA_MAGIC_QUADTREE_ROOT);
+   EMS(EINA_MAGIC_QUADTREE_ITEM);
+#undef EMS
+
+#ifdef EINA_DEFAULT_MEMPOOL
+   choice = "pass_through";
+#else
+   choice = "chained_mempool";
+#endif
+   tmp = getenv("EINA_MEMPOOL");
+   if (tmp && tmp[0])
+      choice = tmp;
+
+   _eina_quadtree_items_mp = eina_mempool_add(choice, "QuadTree Item", NULL,
+                                              sizeof (Eina_QuadTree_Item), 320);
+   eina_quadtree_root_mp = eina_mempool_add(choice, "QuadTree Root", NULL,
+                                            sizeof (Eina_QuadTree_Root), 32);
+
+   return EINA_TRUE;
+}
+
+Eina_Bool
+eina_quadtree_shutdown(void)
+{
+   eina_mempool_del(eina_quadtree_root_mp);
+   eina_mempool_del(_eina_quadtree_items_mp);
+
+   eina_log_domain_unregister(_eina_quadtree_log_dom);
+   _eina_quadtree_log_dom = -1;
+   return EINA_TRUE;
+}
+
+
+