--- /dev/null
+/*
+ * Copyright © 2015 Keith Packard <keithp@keithp.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; version 2 of the License.
+ *
+ * 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, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+package org.altusmetrum.altoslib_7;
+
+import java.io.*;
+import java.util.*;
+import java.text.*;
+import java.lang.Math;
+import java.net.URL;
+import java.net.URLConnection;
+
+public class AltosMapLoader implements AltosMapTileListener, AltosMapStoreListener {
+ AltosMapLoaderListener listener;
+
+ double latitude, longitude;
+ int min_z;
+ int max_z;
+ int cur_z;
+ int all_types;
+ int cur_type;
+ double radius;
+
+ int tiles_loaded_layer;
+ int tiles_loaded_total;
+ int tiles_this_layer;
+ int tiles_total;
+ int layers_total;
+ int layers_loaded;
+
+ AltosMap map;
+
+ int tile_radius(int zoom) {
+ double delta_lon = AltosMapTransform.lon_from_distance(latitude, radius);
+
+ AltosMapTransform t = new AltosMapTransform(256, 256, zoom + AltosMap.default_zoom, new AltosLatLon(latitude, longitude));
+
+ AltosPointDouble center = t.point(new AltosLatLon(latitude, longitude));
+ AltosPointDouble edge = t.point(new AltosLatLon(latitude, longitude + delta_lon));
+
+ int tile_radius = (int) Math.ceil(Math.abs(center.x - edge.x) / AltosMap.px_size);
+
+ return tile_radius;
+ }
+
+ int tiles_per_layer(int zoom) {
+ int tile_radius = tile_radius(zoom);
+ return (tile_radius * 2 + 1) * (tile_radius * 2 + 1);
+ }
+
+ public void do_load() {
+ tiles_this_layer = tiles_per_layer(cur_z);
+ tiles_loaded_layer = 0;
+ listener.debug("tiles_this_layer %d (zoom %d)\n", tiles_this_layer, cur_z);
+
+ int load_radius = tile_radius(cur_z);
+ int zoom = cur_z + AltosMap.default_zoom;
+ int maptype = cur_type;
+ AltosLatLon load_centre = new AltosLatLon(latitude, longitude);
+ AltosMapTransform transform = new AltosMapTransform(256, 256, zoom, load_centre);
+
+ map.centre(load_centre);
+
+ AltosPointInt upper_left;
+ AltosPointInt lower_right;
+
+ AltosPointInt centre = AltosMap.floor(transform.point(load_centre));
+
+ upper_left = new AltosPointInt(centre.x - load_radius * AltosMap.px_size,
+ centre.y - load_radius * AltosMap.px_size);
+ lower_right = new AltosPointInt(centre.x + load_radius * AltosMap.px_size,
+ centre.y + load_radius * AltosMap.px_size);
+
+
+ for (int y = (int) upper_left.y; y <= lower_right.y; y += AltosMap.px_size) {
+ for (int x = (int) upper_left.x; x <= lower_right.x; x += AltosMap.px_size) {
+ listener.debug("Make tile at %d, %d\n", x, y);
+ AltosPointInt point = new AltosPointInt(x, y);
+ AltosLatLon ul = transform.lat_lon(point);
+ AltosLatLon center = transform.lat_lon(new AltosPointDouble(x + AltosMap.px_size/2, y + AltosMap.px_size/2));
+ AltosMapTile tile = map.map_interface.new_tile(this, ul, center, zoom, maptype, AltosMap.px_size);
+ tile.add_store_listener(this);
+ if (tile.store_status() != AltosMapTile.loading)
+ notify_tile(tile, tile.store_status());
+ }
+ }
+ }
+
+ public int next_type(int start) {
+ int next_type;
+ for (next_type = start;
+ next_type <= AltosMap.maptype_terrain && (all_types & (1 << next_type)) == 0;
+ next_type++)
+ ;
+ return next_type;
+ }
+
+ public void next_load() {
+ int next_type = next_type(cur_type + 1);
+
+ if (next_type > AltosMap.maptype_terrain) {
+ if (cur_z == max_z) {
+ return;
+ } else {
+ cur_z++;
+ }
+ next_type = next_type(0);
+ }
+ cur_type = next_type;
+ do_load();
+ }
+
+ private void start_load() {
+
+ cur_z = min_z;
+ int ntype = 0;
+
+ for (int t = AltosMap.maptype_hybrid; t <= AltosMap.maptype_terrain; t++)
+ if ((all_types & (1 << t)) != 0)
+ ntype++;
+ if (ntype == 0) {
+ all_types = (1 << AltosMap.maptype_hybrid);
+ ntype = 1;
+ }
+
+ cur_type = next_type(0);
+
+ for (int z = min_z; z <= max_z; z++)
+ tiles_total += tiles_per_layer(z);
+
+ layers_total = (max_z - min_z + 1) * ntype;
+ layers_loaded = 0;
+ tiles_loaded_total = 0;
+
+ listener.debug("total tiles %d\n", tiles_total);
+
+ listener.loader_start(tiles_total);
+ do_load();
+ }
+
+ public void load(double latitude, double longitude, int min_z, int max_z, double radius, int all_types) {
+ listener.debug("lat %f lon %f min_z %d max_z %d radius %f all_types %d\n",
+ latitude, longitude, min_z, max_z, radius, all_types);
+ this.latitude = latitude;
+ this.longitude = longitude;
+ this.min_z = min_z;
+ this.max_z = max_z;
+ this.radius = radius;
+ this.all_types = all_types;
+ start_load();
+ }
+
+ public synchronized void notify_store(AltosMapStore store, int status) {
+ boolean do_next = false;
+ if (status == AltosMapTile.loading)
+ return;
+
+ if (layers_loaded >= layers_total)
+ return;
+
+ ++tiles_loaded_total;
+ ++tiles_loaded_layer;
+ listener.debug("total %d layer %d\n", tiles_loaded_total, tiles_loaded_layer);
+
+ if (tiles_loaded_layer == tiles_this_layer) {
+ ++layers_loaded;
+ listener.debug("%d layers loaded\n", layers_loaded);
+ if (layers_loaded == layers_total) {
+ listener.loader_done(tiles_total);
+ return;
+ } else {
+ do_next = true;
+ }
+ }
+ listener.loader_notify(tiles_loaded_total,
+ tiles_total, store.file.toString());
+ if (do_next)
+ next_load();
+ }
+
+ public synchronized void notify_tile(AltosMapTile tile, int status) {
+ notify_store(tile.store, status);
+ }
+
+ public AltosMapCache cache() { return map.cache(); }
+
+ public AltosMapLoader(AltosMap map, AltosMapLoaderListener listener) {
+ this.map = map;
+ this.listener = listener;
+ }
+}
projects / fw / altos / blobdiff