/* * Copyright (C) 2009 Simon Wenner * Copyright (C) 2010-2013 Jiri Techet * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ /** * SECTION:champlain-file-tile-source * @short_description: A map source that loads tile data from a file * * This tile source loads local * OpenStreetMap XML data files (*.osm). */ #include "champlain-file-tile-source.h" #include "champlain-debug.h" #include "champlain-bounding-box.h" #include "champlain-enum-types.h" #include "champlain-tile.h" G_DEFINE_TYPE (ChamplainFileTileSource, champlain_file_tile_source, CHAMPLAIN_TYPE_TILE_SOURCE) static void fill_tile (ChamplainMapSource *map_source, ChamplainTile *tile); static void champlain_file_tile_source_dispose (GObject *object) { G_OBJECT_CLASS (champlain_file_tile_source_parent_class)->dispose (object); } static void champlain_file_tile_source_finalize (GObject *object) { G_OBJECT_CLASS (champlain_file_tile_source_parent_class)->finalize (object); } static void champlain_file_tile_source_class_init (ChamplainFileTileSourceClass *klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); ChamplainMapSourceClass *map_source_class = CHAMPLAIN_MAP_SOURCE_CLASS (klass); object_class->dispose = champlain_file_tile_source_dispose; object_class->finalize = champlain_file_tile_source_finalize; map_source_class->fill_tile = fill_tile; } static void champlain_file_tile_source_init (ChamplainFileTileSource *self) { } /** * champlain_file_tile_source_new_full: * @id: the map source's id * @name: the map source's name * @license: the map source's license * @license_uri: the map source's license URI * @min_zoom: the map source's minimum zoom level * @max_zoom: the map source's maximum zoom level * @tile_size: the map source's tile size (in pixels) * @projection: the map source's projection * @renderer: the #ChamplainRenderer used to render tiles * * Constructor of #ChamplainFileTileSource. * * Returns: a constructed #ChamplainFileTileSource object * * Since: 0.8 */ ChamplainFileTileSource * champlain_file_tile_source_new_full (const gchar *id, const gchar *name, const gchar *license, const gchar *license_uri, guint min_zoom, guint max_zoom, guint tile_size, ChamplainMapProjection projection, ChamplainRenderer *renderer) { ChamplainFileTileSource *source; source = g_object_new (CHAMPLAIN_TYPE_FILE_TILE_SOURCE, "id", id, "name", name, "license", license, "license-uri", license_uri, "min-zoom-level", min_zoom, "max-zoom-level", max_zoom, "tile-size", tile_size, "projection", projection, "renderer", renderer, NULL); return source; } /** * champlain_file_tile_source_load_map_data: * @self: a #ChamplainFileTileSource * @map_path: a path to a map data file * * Loads the OpenStreetMap XML file at the given path. * * Since: 0.8 */ void champlain_file_tile_source_load_map_data (ChamplainFileTileSource *self, const gchar *map_path) { g_return_if_fail (CHAMPLAIN_IS_FILE_TILE_SOURCE (self)); ChamplainRenderer *renderer; gchar *data; gsize length; if (!g_file_get_contents (map_path, &data, &length, NULL)) { g_critical ("Error: \"%s\" cannot be read.", map_path); return; } renderer = champlain_map_source_get_renderer (CHAMPLAIN_MAP_SOURCE (self)); champlain_renderer_set_data (renderer, (guint8*) data, length); g_free (data); } static void tile_rendered_cb (ChamplainTile *tile, gpointer data, guint size, gboolean error, ChamplainMapSource *map_source) { ChamplainMapSource *next_source; g_signal_handlers_disconnect_by_func (tile, tile_rendered_cb, map_source); next_source = champlain_map_source_get_next_source (map_source); if (!error) { ChamplainTileSource *tile_source = CHAMPLAIN_TILE_SOURCE (map_source); ChamplainTileCache *tile_cache = champlain_tile_source_get_cache (tile_source); if (tile_cache && data) champlain_tile_cache_store_tile (tile_cache, tile, data, size); champlain_tile_set_fade_in (tile, TRUE); champlain_tile_set_state (tile, CHAMPLAIN_STATE_DONE); champlain_tile_display_content (tile); } else if (next_source) champlain_map_source_fill_tile (next_source, tile); g_object_unref (map_source); g_object_unref (tile); } static void fill_tile (ChamplainMapSource *map_source, ChamplainTile *tile) { g_return_if_fail (CHAMPLAIN_IS_FILE_TILE_SOURCE (map_source)); g_return_if_fail (CHAMPLAIN_IS_TILE (tile)); ChamplainMapSource *next_source = champlain_map_source_get_next_source (map_source); if (champlain_tile_get_state (tile) == CHAMPLAIN_STATE_DONE) return; if (champlain_tile_get_state (tile) != CHAMPLAIN_STATE_LOADED) { ChamplainRenderer *renderer; renderer = champlain_map_source_get_renderer (map_source); g_return_if_fail (CHAMPLAIN_IS_RENDERER (renderer)); g_object_ref (map_source); g_object_ref (tile); g_signal_connect (tile, "render-complete", G_CALLBACK (tile_rendered_cb), map_source); champlain_renderer_render (renderer, tile); } else if (CHAMPLAIN_IS_MAP_SOURCE (next_source)) champlain_map_source_fill_tile (next_source, tile); else if (champlain_tile_get_state (tile) == CHAMPLAIN_STATE_LOADED) { /* if we have some content, use the tile even if it wasn't validated */ champlain_tile_set_state (tile, CHAMPLAIN_STATE_DONE); champlain_tile_display_content (tile); } }