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 * #GritsPluginSat 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 GritsPluginSat *sat = data->sat;
48 GritsTile *tile = data->tile;
49 gchar *path = data->path;
53 g_debug("GritsPluginSat: _load_tile_cb start");
54 GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(path, NULL);
56 g_warning("GritsPluginSat: _load_tile - Error loading pixbuf %s", path);
64 guchar *pixels = gdk_pixbuf_get_pixels(pixbuf);
65 gboolean alpha = gdk_pixbuf_get_has_alpha(pixbuf);
66 gint width = gdk_pixbuf_get_width(pixbuf);
67 gint height = gdk_pixbuf_get_height(pixbuf);
71 //gint stride = gdk_pixbuf_get_rowstride(pixbuf);
72 //for (int i = 0; i < border; i++) {
73 // memset(&pixels[( i)*stride], 0xff, stride);
74 // memset(&pixels[(height-i)*stride], 0xff, stride);
76 //for (int i = 0; i < height; i++) {
77 // memset(&pixels[(i*stride)], 0xff, border*4);
78 // memset(&pixels[(i*stride)+((width-border)*4)], 0xff, border*4);
81 guint *tex = g_new0(guint, 1);
82 glGenTextures(1, tex);
83 glBindTexture(GL_TEXTURE_2D, *tex);
85 glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
86 glPixelStorei(GL_PACK_ALIGNMENT, 1);
87 glTexImage2D(GL_TEXTURE_2D, 0, 4, width, height, 0,
88 (alpha ? GL_RGBA : GL_RGB), GL_UNSIGNED_BYTE, pixels);
89 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
90 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
91 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
92 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
96 gtk_widget_queue_draw(GTK_WIDGET(sat->viewer));
97 g_object_unref(pixbuf);
101 static void _load_tile(GritsTile *tile, gpointer _sat)
103 GritsPluginSat *sat = _sat;
104 g_debug("GritsPluginSat: _load_tile start %p", g_thread_self());
105 struct _LoadTileData *data = g_new0(struct _LoadTileData, 1);
108 data->path = grits_wms_fetch(sat->wms, tile, GRITS_ONCE, NULL, NULL);
109 g_idle_add_full(G_PRIORITY_LOW, _load_tile_cb, data, NULL);
110 g_debug("GritsPluginSat: _load_tile end %p", g_thread_self());
113 static gboolean _free_tile_cb(gpointer data)
115 glDeleteTextures(1, data);
119 static void _free_tile(GritsTile *tile, gpointer _sat)
121 g_debug("GritsPluginSat: _free_tile: %p", tile->data);
123 g_idle_add_full(G_PRIORITY_LOW, _free_tile_cb, tile->data, NULL);
126 static gpointer _update_tiles(gpointer _sat)
128 g_debug("GritsPluginSat: _update_tiles");
129 GritsPluginSat *sat = _sat;
130 if (!g_mutex_trylock(sat->mutex))
133 grits_viewer_get_location(sat->viewer, &eye.lat, &eye.lon, &eye.elev);
134 grits_tile_update(sat->tiles, &eye,
135 MAX_RESOLUTION, TILE_WIDTH, TILE_WIDTH,
137 grits_tile_gc(sat->tiles, time(NULL)-10,
139 g_mutex_unlock(sat->mutex);
146 static void _on_location_changed(GritsViewer *viewer,
147 gdouble lat, gdouble lon, gdouble elev, GritsPluginSat *sat)
149 g_thread_create(_update_tiles, sat, FALSE, NULL);
152 static gpointer _threaded_init(GritsPluginSat *sat)
154 _load_tile(sat->tiles, sat);
163 * grits_plugin_sat_new:
164 * @viewer: the #GritsViewer to use for drawing
166 * Create a new instance of the satellite plugin.
168 * Returns: the new #GritsPluginSat
170 GritsPluginSat *grits_plugin_sat_new(GritsViewer *viewer)
172 g_debug("GritsPluginSat: new");
173 GritsPluginSat *sat = g_object_new(GRITS_TYPE_PLUGIN_SAT, NULL);
174 sat->viewer = g_object_ref(viewer);
176 /* Load initial tiles */
177 g_thread_create((GThreadFunc)_threaded_init, sat, FALSE, NULL);
179 /* Connect signals */
180 sat->sigid = g_signal_connect(sat->viewer, "location-changed",
181 G_CALLBACK(_on_location_changed), sat);
184 grits_viewer_add(viewer, GRITS_OBJECT(sat->tiles), GRITS_LEVEL_WORLD, FALSE);
194 static void grits_plugin_sat_plugin_init(GritsPluginInterface *iface);
195 G_DEFINE_TYPE_WITH_CODE(GritsPluginSat, grits_plugin_sat, G_TYPE_OBJECT,
196 G_IMPLEMENT_INTERFACE(GRITS_TYPE_PLUGIN,
197 grits_plugin_sat_plugin_init));
198 static void grits_plugin_sat_plugin_init(GritsPluginInterface *iface)
200 g_debug("GritsPluginSat: plugin_init");
201 /* Add methods to the interface */
203 /* Class/Object init */
204 static void grits_plugin_sat_init(GritsPluginSat *sat)
206 g_debug("GritsPluginSat: init");
208 sat->mutex = g_mutex_new();
209 sat->tiles = grits_tile_new(NULL, NORTH, SOUTH, EAST, WEST);
210 sat->wms = grits_wms_new(
211 "http://www.nasa.network.com/wms", "bmng200406", "image/jpeg",
212 "bmng/", "jpg", TILE_WIDTH, TILE_HEIGHT);
214 static void grits_plugin_sat_dispose(GObject *gobject)
216 g_debug("GritsPluginSat: dispose");
217 GritsPluginSat *sat = GRITS_PLUGIN_SAT(gobject);
218 /* Drop references */
220 g_signal_handler_disconnect(sat->viewer, sat->sigid);
221 g_object_unref(sat->viewer);
224 G_OBJECT_CLASS(grits_plugin_sat_parent_class)->dispose(gobject);
226 static void grits_plugin_sat_finalize(GObject *gobject)
228 g_debug("GritsPluginSat: finalize");
229 GritsPluginSat *sat = GRITS_PLUGIN_SAT(gobject);
231 grits_tile_free(sat->tiles, _free_tile, sat);
232 grits_wms_free(sat->wms);
233 g_mutex_free(sat->mutex);
234 G_OBJECT_CLASS(grits_plugin_sat_parent_class)->finalize(gobject);
237 static void grits_plugin_sat_class_init(GritsPluginSatClass *klass)
239 g_debug("GritsPluginSat: class_init");
240 GObjectClass *gobject_class = (GObjectClass*)klass;
241 gobject_class->dispose = grits_plugin_sat_dispose;
242 gobject_class->finalize = grits_plugin_sat_finalize;