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