Pileus Git - grits/blob - src/plugins/map.c

   1 /*
   2  * Copyright (C) 2009-2011 Andy Spencer <andy753421@gmail.com>
   3  *
   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.
   8  *
   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.
  13  *
  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/>.
  16  */
  17
  18 /**
  19  * SECTION:map
  20  * @short_description: Map plugin
  21  *
  22  * #GritsPluginMap provides map overlays. Much of this data is obtained from the
  23  * OpenStreetMap project.
  24  */
  25
  26 #include <time.h>
  27 #include <glib/gstdio.h>
  28
  29 #include <grits.h>
  30
  31 #include "map.h"
  32
  33 #define MAX_RESOLUTION 1
  34 #define TILE_WIDTH     256
  35 #define TILE_HEIGHT    256
  36
  37 //#define MAX_RESOLUTION 100
  38 //#define TILE_WIDTH     1024
  39 //#define TILE_HEIGHT    512
  40
  41 static const guchar colormap[][2][4] = {
  42         {{0x73, 0x91, 0xad}, {0x73, 0x91, 0xad, 0x00}}, // Oceans
  43         {{0xf6, 0xee, 0xee}, {0xf6, 0xee, 0xee, 0x00}}, // Ground
  44         {{0xff, 0xff, 0xff}, {0xff, 0xff, 0xff, 0xff}}, // Borders
  45         {{0x73, 0x93, 0xad}, {0x73, 0x93, 0xad, 0x40}}, // Lakes
  46         {{0xff, 0xe1, 0x80}, {0xff, 0xe1, 0x80, 0x60}}, // Cities
  47 };
  48
  49 static void _load_tile_thread(gpointer _tile, gpointer _map)
  50 {
  51         GritsTile      *tile = _tile;
  52         GritsPluginMap *map  = _map;
  53
  54         g_debug("GritsPluginMap: _load_tile_thread start %p - tile=%p",
  55                         g_thread_self(), tile);
  56         if (map->aborted) {
  57                 g_debug("GritsPluginMap: _load_tile_thread - aborted");
  58                 return;
  59         }
  60
  61         /* Download tile */
  62         gchar *path = grits_tms_fetch(map->tms, tile, GRITS_ONCE, NULL, NULL);
  63         //gchar *path = grits_wms_fetch(map->wms, tile, GRITS_ONCE, NULL, NULL);
  64         if (!path) return; // Canceled/error
  65
  66         /* Load pixbuf */
  67         GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(path, NULL);
  68         if (!pixbuf) {
  69                 g_warning("GritsPluginMap: _load_tile_thread - Error loading pixbuf %s", path);
  70                 g_remove(path);
  71                 g_free(path);
  72                 return;
  73         }
  74         g_free(path);
  75
  76 #ifdef MAP_MAP_COLORS
  77         /* Map texture colors, if needed */
  78         gint    width  = gdk_pixbuf_get_width(pixbuf);
  79         gint    height = gdk_pixbuf_get_height(pixbuf);
  80         guchar *pixels = gdk_pixbuf_get_pixels(pixbuf);
  81         for (int i = 0; i < width * height; i++) {
  82                 for (int j = 0; j < G_N_ELEMENTS(colormap); j++) {
  83                         if (pixels[i*4+0] == colormap[j][0][0] &&
  84                             pixels[i*4+1] == colormap[j][0][1] &&
  85                             pixels[i*4+2] == colormap[j][0][2]) {
  86                                 pixels[i*4+0] = colormap[j][1][0];
  87                                 pixels[i*4+1] = colormap[j][1][1];
  88                                 pixels[i*4+2] = colormap[j][1][2];
  89                                 pixels[i*4+3] = colormap[j][1][3];
  90                                 break;
  91                         }
  92                 }
  93         }
  94 #endif
  95
  96         /* Load the GL texture from the main thread */
  97         grits_tile_load_pixbuf(tile, pixbuf);
  98         g_debug("GritsPluginMap: _load_tile_thread end %p", g_thread_self());
  99 }
 100
 101 static void _load_tile_func(GritsTile *tile, gpointer _map)
 102 {
 103         g_debug("GritsPluginMap: _load_tile_func - tile=%p", tile);
 104         GritsPluginMap *map = _map;
 105         g_thread_pool_push(map->threads, tile, NULL);
 106 }
 107
 108 /*************
 109  * Callbacks *
 110  *************/
 111 static void _on_location_changed(GritsViewer *viewer,
 112                 gdouble lat, gdouble lon, gdouble elev, GritsPluginMap *map)
 113 {
 114         GritsPoint eye = {lat, lon, elev};
 115         grits_tile_update(map->tiles, &eye,
 116                         MAX_RESOLUTION, TILE_WIDTH, TILE_WIDTH,
 117                         _load_tile_func, map);
 118         grits_tile_gc(map->tiles, time(NULL)-10, NULL, map);
 119 }
 120
 121 /***********
 122  * Methods *
 123  ***********/
 124 /**
 125  * grits_plugin_map_new:
 126  * @viewer: the #GritsViewer to use for drawing
 127  *
 128  * Create a new instance of the map plugin.
 129  *
 130  * Returns: the new #GritsPluginMap
 131  */
 132 GritsPluginMap *grits_plugin_map_new(GritsViewer *viewer)
 133 {
 134         g_debug("GritsPluginMap: new");
 135         GritsPluginMap *map = g_object_new(GRITS_TYPE_PLUGIN_MAP, NULL);
 136         map->viewer = g_object_ref(viewer);
 137
 138         /* Load initial tiles */
 139         gdouble lat, lon, elev;
 140         grits_viewer_get_location(viewer, &lat, &lon, &elev);
 141         _on_location_changed(viewer, lat, lon, elev, map);
 142
 143         /* Connect signals */
 144         map->sigid = g_signal_connect(map->viewer, "location-changed",
 145                         G_CALLBACK(_on_location_changed), map);
 146
 147         /* Add renderers */
 148         grits_viewer_add(viewer, GRITS_OBJECT(map->tiles), GRITS_LEVEL_WORLD, FALSE);
 149
 150         return map;
 151 }
 152
 153
 154 /****************
 155  * GObject code *
 156  ****************/
 157 /* Plugin init */
 158 static void grits_plugin_map_plugin_init(GritsPluginInterface *iface);
 159 G_DEFINE_TYPE_WITH_CODE(GritsPluginMap, grits_plugin_map, G_TYPE_OBJECT,
 160                 G_IMPLEMENT_INTERFACE(GRITS_TYPE_PLUGIN,
 161                         grits_plugin_map_plugin_init));
 162 static void grits_plugin_map_plugin_init(GritsPluginInterface *iface)
 163 {
 164         g_debug("GritsPluginMap: plugin_init");
 165         /* Add methods to the interface */
 166 }
 167 /* Class/Object init */
 168 static void grits_plugin_map_init(GritsPluginMap *map)
 169 {
 170         g_debug("GritsPluginMap: init");
 171         /* Set defaults */
 172         map->threads = g_thread_pool_new(_load_tile_thread, map, 1, FALSE, NULL);
 173         map->tiles = grits_tile_new(NULL, 85.0511, -85.0511, EAST, WEST);
 174         map->tms   = grits_tms_new("http://tile.openstreetmap.org",
 175                 "osmtile/", "png");
 176         map->tiles->proj = GRITS_PROJ_MERCATOR;
 177         //map->tiles = grits_tile_new(NULL, NORTH, SOUTH, EAST, WEST);
 178         //map->wms   = grits_wms_new(
 179         //      "http://vmap0.tiles.osgeo.org/wms/vmap0",
 180         //      "basic,priroad,secroad,depthcontour,clabel,statelabel",
 181         //       "image/png", "osm/", "png", TILE_WIDTH, TILE_HEIGHT);
 182         g_object_ref(map->tiles);
 183 }
 184 static void grits_plugin_map_dispose(GObject *gobject)
 185 {
 186         g_debug("GritsPluginMap: dispose");
 187         GritsPluginMap *map = GRITS_PLUGIN_MAP(gobject);
 188         map->aborted = TRUE;
 189         /* Drop references */
 190         if (map->viewer) {
 191                 GritsViewer *viewer = map->viewer;
 192                 g_signal_handler_disconnect(viewer, map->sigid);
 193                 soup_session_abort(map->tms->http->soup);
 194                 //soup_session_abort(map->wms->http->soup);
 195                 g_thread_pool_free(map->threads, TRUE, TRUE);
 196                 map->viewer = NULL;
 197                 grits_viewer_remove(viewer, GRITS_OBJECT(map->tiles));
 198                 g_object_unref(map->tiles);
 199                 g_object_unref(viewer);
 200         }
 201         G_OBJECT_CLASS(grits_plugin_map_parent_class)->dispose(gobject);
 202 }
 203 static void grits_plugin_map_finalize(GObject *gobject)
 204 {
 205         g_debug("GritsPluginMap: finalize");
 206         GritsPluginMap *map = GRITS_PLUGIN_MAP(gobject);
 207         /* Free data */
 208         grits_tms_free(map->tms);
 209         //grits_wms_free(map->wms);
 210         grits_tile_free(map->tiles, NULL, map);
 211         G_OBJECT_CLASS(grits_plugin_map_parent_class)->finalize(gobject);
 212
 213 }
 214 static void grits_plugin_map_class_init(GritsPluginMapClass *klass)
 215 {
 216         g_debug("GritsPluginMap: class_init");
 217         GObjectClass *gobject_class = (GObjectClass*)klass;
 218         gobject_class->dispose  = grits_plugin_map_dispose;
 219         gobject_class->finalize = grits_plugin_map_finalize;
 220 }