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/>.
19 #include <glib/gstdio.h>
26 #define MAX_RESOLUTION 500
27 #define TILE_WIDTH 1024
28 #define TILE_HEIGHT 512
30 const guchar colormap[][2][4] = {
31 {{0x73, 0x91, 0xad}, {0x73, 0x91, 0xad, 0x20}}, // Oceans
32 {{0xf6, 0xee, 0xee}, {0xf6, 0xee, 0xee, 0x00}}, // Ground
33 {{0xff, 0xff, 0xff}, {0xff, 0xff, 0xff, 0xff}}, // Borders
34 {{0x73, 0x93, 0xad}, {0x73, 0x93, 0xad, 0x40}}, // Lakes
35 {{0xff, 0xe1, 0x80}, {0xff, 0xe1, 0x80, 0x60}}, // Cities
38 struct _LoadTileData {
44 static gboolean _load_tile_cb(gpointer _data)
46 struct _LoadTileData *data = _data;
47 GisPluginMap *map = data->map;
48 GisTile *tile = data->tile;
49 GdkPixbuf *pixbuf = data->pixbuf;
53 g_debug("GisPluginMap: _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);
59 for (int i = 0; i < width*height; i++) {
60 for (int j = 0; j < G_N_ELEMENTS(colormap); j++) {
61 if (pixels[i*4+0] == colormap[j][0][0] &&
62 pixels[i*4+1] == colormap[j][0][1] &&
63 pixels[i*4+2] == colormap[j][0][2]) {
64 pixels[i*4+0] = colormap[j][1][0];
65 pixels[i*4+1] = colormap[j][1][1];
66 pixels[i*4+2] = colormap[j][1][2];
67 pixels[i*4+3] = colormap[j][1][3];
73 guint *tex = g_new0(guint, 1);
74 glGenTextures(1, tex);
75 glBindTexture(GL_TEXTURE_2D, *tex);
77 glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
78 glPixelStorei(GL_PACK_ALIGNMENT, 1);
79 glTexImage2D(GL_TEXTURE_2D, 0, 4, width, height, 0,
80 (alpha ? GL_RGBA : GL_RGB), GL_UNSIGNED_BYTE, pixels);
81 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
82 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
83 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
84 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
88 gtk_widget_queue_draw(GTK_WIDGET(map->viewer));
89 g_object_unref(pixbuf);
93 static void _load_tile(GisTile *tile, gpointer _map)
95 GisPluginMap *map = _map;
96 g_debug("GisPluginMap: _load_tile start %p", g_thread_self());
97 char *path = gis_wms_fetch(map->wms, tile, GIS_ONCE, NULL, NULL);
98 struct _LoadTileData *data = g_new0(struct _LoadTileData, 1);
101 data->pixbuf = gdk_pixbuf_new_from_file(path, NULL);
103 g_idle_add_full(G_PRIORITY_LOW, _load_tile_cb, data, NULL);
105 g_warning("GisPluginMap: _load_tile - Error loading pixbuf %s", path);
109 g_debug("GisPluginMap: _load_tile end %p", g_thread_self());
112 static gboolean _free_tile_cb(gpointer data)
114 glDeleteTextures(1, data);
118 static void _free_tile(GisTile *tile, gpointer _map)
120 GisPluginMap *map = _map;
121 g_debug("GisPluginMap: _free_tile: %p", tile->data);
122 g_idle_add_full(G_PRIORITY_LOW, _free_tile_cb, tile->data, NULL);
125 static gpointer _update_tiles(gpointer _map)
127 g_debug("GisPluginMap: _update_tiles");
128 GisPluginMap *map = _map;
129 g_mutex_lock(map->mutex);
130 gdouble lat, lon, elev;
131 gis_viewer_get_location(map->viewer, &lat, &lon, &elev);
132 gis_tile_update(map->tiles,
133 MAX_RESOLUTION, TILE_WIDTH, TILE_WIDTH,
136 gis_tile_gc(map->tiles, time(NULL)-10,
138 g_mutex_unlock(map->mutex);
145 static void _on_location_changed(GisViewer *viewer,
146 gdouble lat, gdouble lon, gdouble elev, GisPluginMap *map)
148 g_thread_create(_update_tiles, map, FALSE, NULL);
154 GisPluginMap *gis_plugin_map_new(GisViewer *viewer)
156 g_debug("GisPluginMap: new");
157 GisPluginMap *map = g_object_new(GIS_TYPE_PLUGIN_MAP, NULL);
158 map->viewer = g_object_ref(viewer);
160 /* Load initial tiles */
161 _load_tile(map->tiles, map);
162 g_thread_create(_update_tiles, map, FALSE, NULL);
164 /* Connect signals */
165 map->sigid = g_signal_connect(map->viewer, "location-changed",
166 G_CALLBACK(_on_location_changed), map);
169 gis_viewer_add(viewer, GIS_OBJECT(map->tiles), GIS_LEVEL_OVERLAY, 0);
179 static void gis_plugin_map_plugin_init(GisPluginInterface *iface);
180 G_DEFINE_TYPE_WITH_CODE(GisPluginMap, gis_plugin_map, G_TYPE_OBJECT,
181 G_IMPLEMENT_INTERFACE(GIS_TYPE_PLUGIN,
182 gis_plugin_map_plugin_init));
183 static void gis_plugin_map_plugin_init(GisPluginInterface *iface)
185 g_debug("GisPluginMap: plugin_init");
186 /* Add methods to the interface */
188 /* Class/Object init */
189 static void gis_plugin_map_init(GisPluginMap *map)
191 g_debug("GisPluginMap: init");
193 map->mutex = g_mutex_new();
194 map->tiles = gis_tile_new(NULL, NORTH, SOUTH, EAST, WEST);
195 map->wms = gis_wms_new(
196 "http://labs.metacarta.com/wms/vmap0", "basic", "image/png",
197 "osm/", "png", TILE_WIDTH, TILE_HEIGHT);
199 static void gis_plugin_map_dispose(GObject *gobject)
201 g_debug("GisPluginMap: dispose");
202 GisPluginMap *map = GIS_PLUGIN_MAP(gobject);
203 /* Drop references */
205 g_signal_handler_disconnect(map->viewer, map->sigid);
206 g_object_unref(map->viewer);
209 G_OBJECT_CLASS(gis_plugin_map_parent_class)->dispose(gobject);
211 static void gis_plugin_map_finalize(GObject *gobject)
213 g_debug("GisPluginMap: finalize");
214 GisPluginMap *map = GIS_PLUGIN_MAP(gobject);
216 gis_tile_free(map->tiles, _free_tile, map);
217 gis_wms_free(map->wms);
218 g_mutex_free(map->mutex);
219 G_OBJECT_CLASS(gis_plugin_map_parent_class)->finalize(gobject);
222 static void gis_plugin_map_class_init(GisPluginMapClass *klass)
224 g_debug("GisPluginMap: class_init");
225 GObjectClass *gobject_class = (GObjectClass*)klass;
226 gobject_class->dispose = gis_plugin_map_dispose;
227 gobject_class->finalize = gis_plugin_map_finalize;