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.
28 #include <glib/gstdio.h>
35 #define MAX_RESOLUTION 500
36 #define TILE_WIDTH 1024
37 #define TILE_HEIGHT 512
39 struct _LoadTileData {
44 static gboolean _load_tile_cb(gpointer _data)
46 struct _LoadTileData *data = _data;
47 GisPluginSat *sat = data->sat;
48 GisTile *tile = data->tile;
49 GdkPixbuf *pixbuf = data->pixbuf;
53 g_debug("GisPluginSat: _load_tile_cb start");
54 guchar *pixels = gdk_pixbuf_get_pixels(pixbuf);
55 gboolean alpha = gdk_pixbuf_get_has_alpha(pixbuf);
56 gint width = gdk_pixbuf_get_width(pixbuf);
57 gint height = gdk_pixbuf_get_height(pixbuf);
61 //gint stride = gdk_pixbuf_get_rowstride(pixbuf);
62 //for (int i = 0; i < border; i++) {
63 // memset(&pixels[( i)*stride], 0xff, stride);
64 // memset(&pixels[(height-i)*stride], 0xff, stride);
66 //for (int i = 0; i < height; i++) {
67 // memset(&pixels[(i*stride)], 0xff, border*4);
68 // memset(&pixels[(i*stride)+((width-border)*4)], 0xff, border*4);
71 guint *tex = g_new0(guint, 1);
72 glGenTextures(1, tex);
73 glBindTexture(GL_TEXTURE_2D, *tex);
75 glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
76 glPixelStorei(GL_PACK_ALIGNMENT, 1);
77 glTexImage2D(GL_TEXTURE_2D, 0, 4, width, height, 0,
78 (alpha ? GL_RGBA : GL_RGB), GL_UNSIGNED_BYTE, pixels);
79 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
80 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
81 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
82 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
86 gtk_widget_queue_draw(GTK_WIDGET(sat->viewer));
87 g_object_unref(pixbuf);
91 static void _load_tile(GisTile *tile, gpointer _sat)
93 GisPluginSat *sat = _sat;
94 g_debug("GisPluginSat: _load_tile start %p", g_thread_self());
95 char *path = gis_wms_fetch(sat->wms, tile, GIS_ONCE, NULL, NULL);
96 struct _LoadTileData *data = g_new0(struct _LoadTileData, 1);
99 data->pixbuf = gdk_pixbuf_new_from_file(path, NULL);
101 g_idle_add_full(G_PRIORITY_LOW, _load_tile_cb, data, NULL);
103 g_warning("GisPluginSat: _load_tile - Error loading pixbuf %s", path);
108 g_debug("GisPluginSat: _load_tile end %p", g_thread_self());
111 static gboolean _free_tile_cb(gpointer data)
113 glDeleteTextures(1, data);
117 static void _free_tile(GisTile *tile, gpointer _sat)
119 GisPluginSat *sat = _sat;
120 g_debug("GisPluginSat: _free_tile: %p=%d", tile->data, *(guint*)tile->data);
121 g_idle_add_full(G_PRIORITY_LOW, _free_tile_cb, tile->data, NULL);
124 static gpointer _update_tiles(gpointer _sat)
126 g_debug("GisPluginSat: _update_tiles");
127 GisPluginSat *sat = _sat;
128 g_mutex_lock(sat->mutex);
129 gdouble lat, lon, elev;
130 gis_viewer_get_location(sat->viewer, &lat, &lon, &elev);
131 gis_tile_update(sat->tiles,
132 MAX_RESOLUTION, TILE_WIDTH, TILE_WIDTH,
135 gis_tile_gc(sat->tiles, time(NULL)-10,
137 g_mutex_unlock(sat->mutex);
144 static void _on_location_changed(GisViewer *viewer,
145 gdouble lat, gdouble lon, gdouble elev, GisPluginSat *sat)
147 g_thread_create(_update_tiles, sat, FALSE, NULL);
154 * gis_plugin_sat_new:
155 * @viewer: the #GisViewer to use for drawing
157 * Create a new instance of the satellite plugin.
159 * Returns: the new #GisPluginSat
161 GisPluginSat *gis_plugin_sat_new(GisViewer *viewer)
163 g_debug("GisPluginSat: new");
164 GisPluginSat *sat = g_object_new(GIS_TYPE_PLUGIN_SAT, NULL);
165 sat->viewer = g_object_ref(viewer);
167 /* Load initial tiles */
168 _load_tile(sat->tiles, sat);
169 g_thread_create(_update_tiles, sat, FALSE, NULL);
171 /* Connect signals */
172 sat->sigid = g_signal_connect(sat->viewer, "location-changed",
173 G_CALLBACK(_on_location_changed), sat);
176 gis_viewer_add(viewer, GIS_OBJECT(sat->tiles), GIS_LEVEL_WORLD, 0);
186 static void gis_plugin_sat_plugin_init(GisPluginInterface *iface);
187 G_DEFINE_TYPE_WITH_CODE(GisPluginSat, gis_plugin_sat, G_TYPE_OBJECT,
188 G_IMPLEMENT_INTERFACE(GIS_TYPE_PLUGIN,
189 gis_plugin_sat_plugin_init));
190 static void gis_plugin_sat_plugin_init(GisPluginInterface *iface)
192 g_debug("GisPluginSat: plugin_init");
193 /* Add methods to the interface */
195 /* Class/Object init */
196 static void gis_plugin_sat_init(GisPluginSat *sat)
198 g_debug("GisPluginSat: init");
200 sat->mutex = g_mutex_new();
201 sat->tiles = gis_tile_new(NULL, NORTH, SOUTH, EAST, WEST);
202 sat->wms = gis_wms_new(
203 "http://www.nasa.network.com/wms", "bmng200406", "image/jpeg",
204 "bmng/", "jpg", TILE_WIDTH, TILE_HEIGHT);
206 static void gis_plugin_sat_dispose(GObject *gobject)
208 g_debug("GisPluginSat: dispose");
209 GisPluginSat *sat = GIS_PLUGIN_SAT(gobject);
210 /* Drop references */
212 g_signal_handler_disconnect(sat->viewer, sat->sigid);
213 g_object_unref(sat->viewer);
216 G_OBJECT_CLASS(gis_plugin_sat_parent_class)->dispose(gobject);
218 static void gis_plugin_sat_finalize(GObject *gobject)
220 g_debug("GisPluginSat: finalize");
221 GisPluginSat *sat = GIS_PLUGIN_SAT(gobject);
223 gis_tile_free(sat->tiles, _free_tile, sat);
224 gis_wms_free(sat->wms);
225 g_mutex_free(sat->mutex);
226 G_OBJECT_CLASS(gis_plugin_sat_parent_class)->finalize(gobject);
229 static void gis_plugin_sat_class_init(GisPluginSatClass *klass)
231 g_debug("GisPluginSat: class_init");
232 GObjectClass *gobject_class = (GObjectClass*)klass;
233 gobject_class->dispose = gis_plugin_sat_dispose;
234 gobject_class->finalize = gis_plugin_sat_finalize;