Move objects to a subdirectory

[grits] / src / objects / gis-tile.h

diff --git a/src/objects/gis-tile.h b/src/objects/gis-tile.h
new file mode 100644 (file)
index 0000000..b7e9123
--- /dev/null
+++ b/src/objects/gis-tile.h
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2009-2010 Andy Spencer <andy753421@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIS_TILE_H__
+#define __GIS_TILE_H__
+
+#include <glib.h>
+#include "gis-object.h"
+
+#define GIS_TYPE_TILE (gis_tile_get_type())
+
+GOBJECT_HEAD(
+       GIS, TILE,
+       Gis, Tile,
+       gis, tile);
+
+struct _GisTile {
+       GisObject  parent_instance;
+
+       /* Pointer to the tile data */
+       gpointer data;
+
+       /* North,South,East,West limits */
+       struct {
+               gdouble n,s,e,w;
+       } edge;
+
+       /* Pointers to parent/child nodes */
+       GisTile *parent;
+       GisTile *children[2][2];
+
+       /* Last access time (for garbage collection) */
+       time_t atime;
+};
+
+struct _GisTileClass {
+       GisObjectClass parent_class;
+};
+
+typedef void (*GisTileLoadFunc)(GisTile *tile, gpointer user_data);
+typedef void (*GisTileFreeFunc)(GisTile *tile, gpointer user_data);
+
+/* Forech functions */
+#define gis_tile_foreach(tile, child) \
+       for (int _x = 0; _x < G_N_ELEMENTS(tile->children); _x++) \
+       for (int _y = 0; child = tile->children[_x][_y], \
+               _y < G_N_ELEMENTS(tile->children[_x]); _y++) \
+
+#define gis_tile_foreach_index(tile, x, y) \
+       for (x = 0; x < G_N_ELEMENTS(tile->children); x++) \
+       for (y = 0; y < G_N_ELEMENTS(tile->children[x]); y++)
+
+/* Path to string table, keep in sync with tile->children */
+extern gchar *gis_tile_path_table[2][2];
+
+/* Allocate a new Tile */
+GisTile *gis_tile_new(GisTile *parent,
+       gdouble n, gdouble s, gdouble e, gdouble w);
+
+/* Return a string representation of the tile's path */
+gchar *gis_tile_get_path(GisTile *child);
+
+/* Update a root tile */
+/* Based on eye distance (lat,lon,elev) */
+void gis_tile_update(GisTile *root,
+               gdouble res, gint width, gint height,
+               gdouble lat, gdouble lon, gdouble elev,
+               GisTileLoadFunc load_func, gpointer user_data);
+
+/* Find the leaf tile containing lat-lon */
+GisTile *gis_tile_find(GisTile *root, gdouble lat, gdouble lon);
+
+/* Delete nodes that haven't been accessed since atime */
+GisTile *gis_tile_gc(GisTile *root, time_t atime,
+               GisTileFreeFunc free_func, gpointer user_data);
+
+/* Free a tile and all it's children */
+void gis_tile_free(GisTile *root,
+               GisTileFreeFunc free_func, gpointer user_data);
+
+#endif