2 * Copyright (C) 2009-2010 Andy Spencer <andy753421@gmail.com>
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 3 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 * @short_description: Map plugin
22 * #GritsPluginMap provides map overlays. Much of this data is obtained from the
23 * OpenStreetMap project.
27 #include <glib/gstdio.h>
34 #define MAX_RESOLUTION 100
35 #define TILE_WIDTH 1024
36 #define TILE_HEIGHT 512
38 static const guchar colormap[][2][4] = {
39 {{0x73, 0x91, 0xad}, {0x73, 0x91, 0xad, 0x20}}, // Oceans
40 {{0xf6, 0xee, 0xee}, {0xf6, 0xee, 0xee, 0x00}}, // Ground
41 {{0xff, 0xff, 0xff}, {0xff, 0xff, 0xff, 0xff}}, // Borders
42 {{0x73, 0x93, 0xad}, {0x73, 0x93, 0xad, 0x40}}, // Lakes
43 {{0xff, 0xe1, 0x80}, {0xff, 0xe1, 0x80, 0x60}}, // Cities
46 struct _LoadTileData {
54 static gboolean _load_tile_cb(gpointer _data)
56 struct _LoadTileData *data = _data;
57 g_debug("GritsPluginMap: _load_tile_cb start");
59 guint *tex = g_new0(guint, 1);
60 glGenTextures(1, tex);
61 glBindTexture(GL_TEXTURE_2D, *tex);
63 glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
64 glPixelStorei(GL_PACK_ALIGNMENT, 1);
65 glTexImage2D(GL_TEXTURE_2D, 0, 4, data->width, data->height, 0,
66 (data->alpha ? GL_RGBA : GL_RGB), GL_UNSIGNED_BYTE, data->pixels);
67 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
68 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
69 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
70 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
73 data->tile->data = tex;
74 gtk_widget_queue_draw(GTK_WIDGET(data->map->viewer));
80 static void _load_tile(GritsTile *tile, gpointer _map)
82 GritsPluginMap *map = _map;
83 g_debug("GritsPluginMap: _load_tile start %p", g_thread_self());
85 g_debug("GritsPluginMap: _load_tile - aborted");
90 gchar *path = grits_wms_fetch(map->wms, tile, GRITS_ONCE, NULL, NULL);
91 if (!path) return; // Canceled/error
94 GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(path, NULL);
96 g_warning("GritsPluginMap: _load_tile - Error loading pixbuf %s", path);
103 /* Copy pixbuf data for callback */
104 struct _LoadTileData *data = g_new0(struct _LoadTileData, 1);
107 data->pixels = gdk_pixbuf_get_pixels(pixbuf);
108 data->alpha = gdk_pixbuf_get_has_alpha(pixbuf);
109 data->width = gdk_pixbuf_get_width(pixbuf);
110 data->height = gdk_pixbuf_get_height(pixbuf);
111 data->pixels = g_memdup(data->pixels,
112 data->width * data->height * (data->alpha ? 4 : 3));
113 g_object_unref(pixbuf);
115 /* Map texture colors, if needed */
116 for (int i = 0; i < data->width * data->height; i++) {
117 for (int j = 0; j < G_N_ELEMENTS(colormap); j++) {
118 if (data->pixels[i*4+0] == colormap[j][0][0] &&
119 data->pixels[i*4+1] == colormap[j][0][1] &&
120 data->pixels[i*4+2] == colormap[j][0][2]) {
121 data->pixels[i*4+0] = colormap[j][1][0];
122 data->pixels[i*4+1] = colormap[j][1][1];
123 data->pixels[i*4+2] = colormap[j][1][2];
124 data->pixels[i*4+3] = colormap[j][1][3];
130 /* Load the GL texture from the main thread */
131 g_idle_add_full(G_PRIORITY_LOW, _load_tile_cb, data, NULL);
132 g_debug("GritsPluginMap: _load_tile end %p", g_thread_self());
135 static gboolean _free_tile_cb(gpointer data)
137 glDeleteTextures(1, data);
141 static void _free_tile(GritsTile *tile, gpointer _map)
143 g_debug("GritsPluginMap: _free_tile: %p", tile->data);
145 g_idle_add_full(G_PRIORITY_LOW, _free_tile_cb, tile->data, NULL);
148 static void _update_tiles(gpointer _, gpointer _map)
150 g_debug("GritsPluginMap: _update_tiles");
151 GritsPluginMap *map = _map;
153 grits_viewer_get_location(map->viewer, &eye.lat, &eye.lon, &eye.elev);
154 grits_tile_update(map->tiles, &eye,
155 MAX_RESOLUTION, TILE_WIDTH, TILE_WIDTH,
157 grits_tile_gc(map->tiles, time(NULL)-10,
164 static void _on_location_changed(GritsViewer *viewer,
165 gdouble lat, gdouble lon, gdouble elev, GritsPluginMap *map)
167 g_thread_pool_push(map->threads, NULL+1, NULL);
174 * grits_plugin_map_new:
175 * @viewer: the #GritsViewer to use for drawing
177 * Create a new instance of the map plugin.
179 * Returns: the new #GritsPluginMap
181 GritsPluginMap *grits_plugin_map_new(GritsViewer *viewer)
183 g_debug("GritsPluginMap: new");
184 GritsPluginMap *map = g_object_new(GRITS_TYPE_PLUGIN_MAP, NULL);
185 map->viewer = g_object_ref(viewer);
187 /* Load initial tiles */
188 _load_tile(map->tiles, map);
189 _update_tiles(NULL, map);
191 /* Connect signals */
192 map->sigid = g_signal_connect(map->viewer, "location-changed",
193 G_CALLBACK(_on_location_changed), map);
196 grits_viewer_add(viewer, GRITS_OBJECT(map->tiles), GRITS_LEVEL_OVERLAY-1, 0);
206 static void grits_plugin_map_plugin_init(GritsPluginInterface *iface);
207 G_DEFINE_TYPE_WITH_CODE(GritsPluginMap, grits_plugin_map, G_TYPE_OBJECT,
208 G_IMPLEMENT_INTERFACE(GRITS_TYPE_PLUGIN,
209 grits_plugin_map_plugin_init));
210 static void grits_plugin_map_plugin_init(GritsPluginInterface *iface)
212 g_debug("GritsPluginMap: plugin_init");
213 /* Add methods to the interface */
215 /* Class/Object init */
216 static void grits_plugin_map_init(GritsPluginMap *map)
218 g_debug("GritsPluginMap: init");
220 map->threads = g_thread_pool_new(_update_tiles, map, 1, FALSE, NULL);
221 map->tiles = grits_tile_new(NULL, NORTH, SOUTH, EAST, WEST);
222 map->wms = grits_wms_new(
223 "http://vmap0.tiles.osgeo.org/wms/vmap0",
224 "basic,priroad,secroad,depthcontour,clabel,statelabel",
225 "image/png", "osm/", "png", TILE_WIDTH, TILE_HEIGHT);
226 g_object_ref(map->tiles);
228 static void grits_plugin_map_dispose(GObject *gobject)
230 g_debug("GritsPluginMap: dispose");
231 GritsPluginMap *map = GRITS_PLUGIN_MAP(gobject);
233 /* Drop references */
235 g_signal_handler_disconnect(map->viewer, map->sigid);
236 grits_viewer_remove(map->viewer, GRITS_OBJECT(map->tiles));
237 soup_session_abort(map->wms->http->soup);
238 g_thread_pool_free(map->threads, TRUE, TRUE);
239 while (gtk_events_pending())
240 gtk_main_iteration();
241 g_object_unref(map->viewer);
244 G_OBJECT_CLASS(grits_plugin_map_parent_class)->dispose(gobject);
246 static void grits_plugin_map_finalize(GObject *gobject)
248 g_debug("GritsPluginMap: finalize");
249 GritsPluginMap *map = GRITS_PLUGIN_MAP(gobject);
251 grits_wms_free(map->wms);
252 grits_tile_free(map->tiles, _free_tile, map);
253 G_OBJECT_CLASS(grits_plugin_map_parent_class)->finalize(gobject);
256 static void grits_plugin_map_class_init(GritsPluginMapClass *klass)
258 g_debug("GritsPluginMap: class_init");
259 GObjectClass *gobject_class = (GObjectClass*)klass;
260 gobject_class->dispose = grits_plugin_map_dispose;
261 gobject_class->finalize = grits_plugin_map_finalize;