/* * Copyright (C) 2009-2010 Andy Spencer * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ /** * SECTION:map * @short_description: Map plugin * * #GritsPluginMap provides map overlays. Much of this data is obtained from the * OpenStreetMap project. */ #include #include #include #include #include "map.h" #define MAX_RESOLUTION 100 #define TILE_WIDTH 1024 #define TILE_HEIGHT 512 static const guchar colormap[][2][4] = { {{0x73, 0x91, 0xad}, {0x73, 0x91, 0xad, 0x20}}, // Oceans {{0xf6, 0xee, 0xee}, {0xf6, 0xee, 0xee, 0x00}}, // Ground {{0xff, 0xff, 0xff}, {0xff, 0xff, 0xff, 0xff}}, // Borders {{0x73, 0x93, 0xad}, {0x73, 0x93, 0xad, 0x40}}, // Lakes {{0xff, 0xe1, 0x80}, {0xff, 0xe1, 0x80, 0x60}}, // Cities }; struct _LoadTileData { GritsPluginMap *map; GritsTile *tile; guint8 *pixels; gboolean alpha; gint width; gint height; }; static gboolean _load_tile_cb(gpointer _data) { struct _LoadTileData *data = _data; g_debug("GritsPluginMap: _load_tile_cb start"); guint *tex = g_new0(guint, 1); glGenTextures(1, tex); glBindTexture(GL_TEXTURE_2D, *tex); glPixelStorei(GL_UNPACK_ALIGNMENT, 1); glPixelStorei(GL_PACK_ALIGNMENT, 1); glTexImage2D(GL_TEXTURE_2D, 0, 4, data->width, data->height, 0, (data->alpha ? GL_RGBA : GL_RGB), GL_UNSIGNED_BYTE, data->pixels); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP); glFlush(); data->tile->data = tex; gtk_widget_queue_draw(GTK_WIDGET(data->map->viewer)); g_free(data->pixels); g_free(data); return FALSE; } static void _load_tile(GritsTile *tile, gpointer _map) { GritsPluginMap *map = _map; g_debug("GritsPluginMap: _load_tile start %p", g_thread_self()); if (map->aborted) { g_debug("GritsPluginMap: _load_tile - aborted"); return; } /* Download tile */ gchar *path = grits_wms_fetch(map->wms, tile, GRITS_ONCE, NULL, NULL); if (!path) return; // Canceled/error /* Load pixbuf */ GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(path, NULL); if (!pixbuf) { g_warning("GritsPluginMap: _load_tile - Error loading pixbuf %s", path); g_remove(path); g_free(path); return; } g_free(path); /* Copy pixbuf data for callback */ struct _LoadTileData *data = g_new0(struct _LoadTileData, 1); data->map = map; data->tile = tile; data->pixels = gdk_pixbuf_get_pixels(pixbuf); data->alpha = gdk_pixbuf_get_has_alpha(pixbuf); data->width = gdk_pixbuf_get_width(pixbuf); data->height = gdk_pixbuf_get_height(pixbuf); data->pixels = g_memdup(data->pixels, data->width * data->height * (data->alpha ? 4 : 3)); g_object_unref(pixbuf); /* Map texture colors, if needed */ for (int i = 0; i < data->width * data->height; i++) { for (int j = 0; j < G_N_ELEMENTS(colormap); j++) { if (data->pixels[i*4+0] == colormap[j][0][0] && data->pixels[i*4+1] == colormap[j][0][1] && data->pixels[i*4+2] == colormap[j][0][2]) { data->pixels[i*4+0] = colormap[j][1][0]; data->pixels[i*4+1] = colormap[j][1][1]; data->pixels[i*4+2] = colormap[j][1][2]; data->pixels[i*4+3] = colormap[j][1][3]; break; } } } /* Load the GL texture from the main thread */ g_idle_add_full(G_PRIORITY_LOW, _load_tile_cb, data, NULL); g_debug("GritsPluginMap: _load_tile end %p", g_thread_self()); } static gboolean _free_tile_cb(gpointer data) { glDeleteTextures(1, data); g_free(data); return FALSE; } static void _free_tile(GritsTile *tile, gpointer _map) { g_debug("GritsPluginMap: _free_tile: %p", tile->data); if (tile->data) g_idle_add_full(G_PRIORITY_LOW, _free_tile_cb, tile->data, NULL); } static void _update_tiles(gpointer _, gpointer _map) { g_debug("GritsPluginMap: _update_tiles"); GritsPluginMap *map = _map; GritsPoint eye; grits_viewer_get_location(map->viewer, &eye.lat, &eye.lon, &eye.elev); grits_tile_update(map->tiles, &eye, MAX_RESOLUTION, TILE_WIDTH, TILE_WIDTH, _load_tile, map); grits_tile_gc(map->tiles, time(NULL)-10, _free_tile, map); } /************* * Callbacks * *************/ static void _on_location_changed(GritsViewer *viewer, gdouble lat, gdouble lon, gdouble elev, GritsPluginMap *map) { g_thread_pool_push(map->threads, NULL+1, NULL); } /*********** * Methods * ***********/ /** * grits_plugin_map_new: * @viewer: the #GritsViewer to use for drawing * * Create a new instance of the map plugin. * * Returns: the new #GritsPluginMap */ GritsPluginMap *grits_plugin_map_new(GritsViewer *viewer) { g_debug("GritsPluginMap: new"); GritsPluginMap *map = g_object_new(GRITS_TYPE_PLUGIN_MAP, NULL); map->viewer = g_object_ref(viewer); /* Load initial tiles */ _load_tile(map->tiles, map); _update_tiles(NULL, map); /* Connect signals */ map->sigid = g_signal_connect(map->viewer, "location-changed", G_CALLBACK(_on_location_changed), map); /* Add renderers */ grits_viewer_add(viewer, GRITS_OBJECT(map->tiles), GRITS_LEVEL_OVERLAY-1, 0); return map; } /**************** * GObject code * ****************/ /* Plugin init */ static void grits_plugin_map_plugin_init(GritsPluginInterface *iface); G_DEFINE_TYPE_WITH_CODE(GritsPluginMap, grits_plugin_map, G_TYPE_OBJECT, G_IMPLEMENT_INTERFACE(GRITS_TYPE_PLUGIN, grits_plugin_map_plugin_init)); static void grits_plugin_map_plugin_init(GritsPluginInterface *iface) { g_debug("GritsPluginMap: plugin_init"); /* Add methods to the interface */ } /* Class/Object init */ static void grits_plugin_map_init(GritsPluginMap *map) { g_debug("GritsPluginMap: init"); /* Set defaults */ map->threads = g_thread_pool_new(_update_tiles, map, 1, FALSE, NULL); map->tiles = grits_tile_new(NULL, NORTH, SOUTH, EAST, WEST); map->wms = grits_wms_new( "http://vmap0.tiles.osgeo.org/wms/vmap0", "basic,priroad,secroad,depthcontour,clabel,statelabel", "image/png", "osm/", "png", TILE_WIDTH, TILE_HEIGHT); g_object_ref(map->tiles); } static void grits_plugin_map_dispose(GObject *gobject) { g_debug("GritsPluginMap: dispose"); GritsPluginMap *map = GRITS_PLUGIN_MAP(gobject); map->aborted = TRUE; /* Drop references */ if (map->viewer) { g_signal_handler_disconnect(map->viewer, map->sigid); grits_viewer_remove(map->viewer, map->tiles); soup_session_abort(map->wms->http->soup); g_thread_pool_free(map->threads, TRUE, TRUE); while (gtk_events_pending()) gtk_main_iteration(); g_object_unref(map->viewer); map->viewer = NULL; } G_OBJECT_CLASS(grits_plugin_map_parent_class)->dispose(gobject); } static void grits_plugin_map_finalize(GObject *gobject) { g_debug("GritsPluginMap: finalize"); GritsPluginMap *map = GRITS_PLUGIN_MAP(gobject); /* Free data */ grits_wms_free(map->wms); grits_tile_free(map->tiles, _free_tile, map); G_OBJECT_CLASS(grits_plugin_map_parent_class)->finalize(gobject); } static void grits_plugin_map_class_init(GritsPluginMapClass *klass) { g_debug("GritsPluginMap: class_init"); GObjectClass *gobject_class = (GObjectClass*)klass; gobject_class->dispose = grits_plugin_map_dispose; gobject_class->finalize = grits_plugin_map_finalize; }