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: Satellite plugin
22 * #GisPluginSat provides overlays using satellite imagery. This is mostly
23 * provided by NASA's Blue Marble Next Generation.
27 #include <glib/gstdio.h>
34 #define MAX_RESOLUTION 500
35 #define TILE_WIDTH 1024
36 #define TILE_HEIGHT 512
38 struct _LoadTileData {
43 static gboolean _load_tile_cb(gpointer _data)
45 struct _LoadTileData *data = _data;
46 GisPluginSat *sat = data->sat;
47 GisTile *tile = data->tile;
48 GdkPixbuf *pixbuf = data->pixbuf;
52 g_debug("GisPluginSat: _load_tile_cb start");
53 guchar *pixels = gdk_pixbuf_get_pixels(pixbuf);
54 gboolean alpha = gdk_pixbuf_get_has_alpha(pixbuf);
55 gint width = gdk_pixbuf_get_width(pixbuf);
56 gint height = gdk_pixbuf_get_height(pixbuf);
58 guint *tex = g_new0(guint, 1);
59 glGenTextures(1, tex);
60 glBindTexture(GL_TEXTURE_2D, *tex);
62 glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
63 glPixelStorei(GL_PACK_ALIGNMENT, 1);
64 glTexImage2D(GL_TEXTURE_2D, 0, 4, width, height, 0,
65 (alpha ? GL_RGBA : GL_RGB), GL_UNSIGNED_BYTE, pixels);
66 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
67 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
68 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
69 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
73 gtk_widget_queue_draw(GTK_WIDGET(sat->viewer));
74 g_object_unref(pixbuf);
78 static void _load_tile(GisTile *tile, gpointer _sat)
80 GisPluginSat *sat = _sat;
81 g_debug("GisPluginSat: _load_tile start %p", g_thread_self());
82 char *path = gis_wms_fetch(sat->wms, tile, GIS_ONCE, NULL, NULL);
83 struct _LoadTileData *data = g_new0(struct _LoadTileData, 1);
86 data->pixbuf = gdk_pixbuf_new_from_file(path, NULL);
88 g_idle_add_full(G_PRIORITY_LOW, _load_tile_cb, data, NULL);
90 g_warning("GisPluginSat: _load_tile - Error loading pixbuf %s", path);
95 g_debug("GisPluginSat: _load_tile end %p", g_thread_self());
98 static gboolean _free_tile_cb(gpointer data)
100 glDeleteTextures(1, data);
104 static void _free_tile(GisTile *tile, gpointer _sat)
106 GisPluginSat *sat = _sat;
107 g_debug("GisPluginSat: _free_tile: %p=%d", tile->data, *(guint*)tile->data);
108 g_idle_add_full(G_PRIORITY_LOW, _free_tile_cb, tile->data, NULL);
111 static gpointer _update_tiles(gpointer _sat)
113 g_debug("GisPluginSat: _update_tiles");
114 GisPluginSat *sat = _sat;
115 g_mutex_lock(sat->mutex);
116 gdouble lat, lon, elev;
117 gis_viewer_get_location(sat->viewer, &lat, &lon, &elev);
118 gis_tile_update(sat->tiles,
119 MAX_RESOLUTION, TILE_WIDTH, TILE_WIDTH,
122 gis_tile_gc(sat->tiles, time(NULL)-10,
124 g_mutex_unlock(sat->mutex);
131 static void _on_location_changed(GisViewer *viewer,
132 gdouble lat, gdouble lon, gdouble elev, GisPluginSat *sat)
134 g_thread_create(_update_tiles, sat, FALSE, NULL);
141 * gis_plugin_sat_new:
142 * @viewer: the #GisViewer to use for drawing
144 * Create a new instance of the satellite plugin.
146 * Returns: the new #GisPluginSat
148 GisPluginSat *gis_plugin_sat_new(GisViewer *viewer)
150 g_debug("GisPluginSat: new");
151 GisPluginSat *sat = g_object_new(GIS_TYPE_PLUGIN_SAT, NULL);
152 sat->viewer = g_object_ref(viewer);
154 /* Load initial tiles */
155 _load_tile(sat->tiles, sat);
156 g_thread_create(_update_tiles, sat, FALSE, NULL);
158 /* Connect signals */
159 sat->sigid = g_signal_connect(sat->viewer, "location-changed",
160 G_CALLBACK(_on_location_changed), sat);
163 gis_viewer_add(viewer, GIS_OBJECT(sat->tiles), GIS_LEVEL_WORLD, 0);
173 static void gis_plugin_sat_plugin_init(GisPluginInterface *iface);
174 G_DEFINE_TYPE_WITH_CODE(GisPluginSat, gis_plugin_sat, G_TYPE_OBJECT,
175 G_IMPLEMENT_INTERFACE(GIS_TYPE_PLUGIN,
176 gis_plugin_sat_plugin_init));
177 static void gis_plugin_sat_plugin_init(GisPluginInterface *iface)
179 g_debug("GisPluginSat: plugin_init");
180 /* Add methods to the interface */
182 /* Class/Object init */
183 static void gis_plugin_sat_init(GisPluginSat *sat)
185 g_debug("GisPluginSat: init");
187 sat->mutex = g_mutex_new();
188 sat->tiles = gis_tile_new(NULL, NORTH, SOUTH, EAST, WEST);
189 sat->wms = gis_wms_new(
190 "http://www.nasa.network.com/wms", "bmng200406", "image/jpeg",
191 "bmng/", "jpg", TILE_WIDTH, TILE_HEIGHT);
193 static void gis_plugin_sat_dispose(GObject *gobject)
195 g_debug("GisPluginSat: dispose");
196 GisPluginSat *sat = GIS_PLUGIN_SAT(gobject);
197 /* Drop references */
199 g_signal_handler_disconnect(sat->viewer, sat->sigid);
200 g_object_unref(sat->viewer);
203 G_OBJECT_CLASS(gis_plugin_sat_parent_class)->dispose(gobject);
205 static void gis_plugin_sat_finalize(GObject *gobject)
207 g_debug("GisPluginSat: finalize");
208 GisPluginSat *sat = GIS_PLUGIN_SAT(gobject);
210 gis_tile_free(sat->tiles, _free_tile, sat);
211 gis_wms_free(sat->wms);
212 g_mutex_free(sat->mutex);
213 G_OBJECT_CLASS(gis_plugin_sat_parent_class)->finalize(gobject);
216 static void gis_plugin_sat_class_init(GisPluginSatClass *klass)
218 g_debug("GisPluginSat: class_init");
219 GObjectClass *gobject_class = (GObjectClass*)klass;
220 gobject_class->dispose = gis_plugin_sat_dispose;
221 gobject_class->finalize = gis_plugin_sat_finalize;