/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */ /* * viking * Copyright (C) 2009, Guilhem Bonnefille * * viking 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. * * viking 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:vikslippymapsource * @short_description: the class for SlippyMap oriented map sources * * The #VikSlippyMapSource class handles slippy map oriented map sources. * The related service is tile oriented, à la Google. * * The tiles are in 'google spherical mercator', which is * basically a mercator projection that assumes a spherical earth. * http://docs.openlayers.org/library/spherical_mercator.html * * Such service is also a type of TMS (Tile Map Service) as defined in * OSGeo's wiki. * http://wiki.osgeo.org/wiki/Tile_Map_Service_Specification * But take care that the Y axis is inverted, ie the origin is at top-left * corner. * Following this specification, the protocol handled by this class * follows the global-mercator profile. * * You can also find many interesting information on the OSM's wiki. * http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames * http://wiki.openstreetmap.org/wiki/Setting_up_TMS */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #ifdef HAVE_MATH_H #include #endif #include "globals.h" #include "vikslippymapsource.h" #include "maputils.h" static gboolean _coord_to_mapcoord ( VikMapSource *self, const VikCoord *src, gdouble xzoom, gdouble yzoom, MapCoord *dest ); static void _mapcoord_to_center_coord ( VikMapSource *self, MapCoord *src, VikCoord *dest ); static gboolean _is_direct_file_access (VikMapSource *self ); static gboolean _is_mbtiles (VikMapSource *self ); static gboolean _supports_download_only_new (VikMapSource *self ); static gchar *_get_uri( VikMapSourceDefault *self, MapCoord *src ); static gchar *_get_hostname( VikMapSourceDefault *self ); static DownloadMapOptions *_get_download_options( VikMapSourceDefault *self ); typedef struct _VikSlippyMapSourcePrivate VikSlippyMapSourcePrivate; struct _VikSlippyMapSourcePrivate { gchar *hostname; gchar *url; DownloadMapOptions options; gboolean is_direct_file_access; gboolean is_mbtiles; }; #define VIK_SLIPPY_MAP_SOURCE_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), VIK_TYPE_SLIPPY_MAP_SOURCE, VikSlippyMapSourcePrivate)) /* properties */ enum { PROP_0, PROP_HOSTNAME, PROP_URL, PROP_REFERER, PROP_FOLLOW_LOCATION, PROP_CHECK_FILE_SERVER_TIME, PROP_USE_ETAG, PROP_IS_DIRECT_FILE_ACCESS, PROP_IS_MBTILES, }; G_DEFINE_TYPE (VikSlippyMapSource, vik_slippy_map_source, VIK_TYPE_MAP_SOURCE_DEFAULT); static void vik_slippy_map_source_init (VikSlippyMapSource *self) { /* initialize the object here */ VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE (self); priv->hostname = NULL; priv->url = NULL; priv->options.referer = NULL; priv->options.follow_location = 0; priv->options.check_file = a_check_map_file; priv->options.check_file_server_time = FALSE; priv->options.use_etag = FALSE; priv->is_direct_file_access = FALSE; priv->is_mbtiles = FALSE; g_object_set (G_OBJECT (self), "tilesize-x", 256, "tilesize-y", 256, "drawmode", VIK_VIEWPORT_DRAWMODE_MERCATOR, NULL); } static void vik_slippy_map_source_finalize (GObject *object) { VikSlippyMapSource *self = VIK_SLIPPY_MAP_SOURCE (object); VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE (self); g_free (priv->hostname); priv->hostname = NULL; g_free (priv->url); priv->url = NULL; g_free (priv->options.referer); priv->options.referer = NULL; G_OBJECT_CLASS (vik_slippy_map_source_parent_class)->finalize (object); } static void vik_slippy_map_source_set_property (GObject *object, guint property_id, const GValue *value, GParamSpec *pspec) { VikSlippyMapSource *self = VIK_SLIPPY_MAP_SOURCE (object); VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE (self); switch (property_id) { case PROP_HOSTNAME: g_free (priv->hostname); priv->hostname = g_value_dup_string (value); break; case PROP_URL: g_free (priv->url); priv->url = g_value_dup_string (value); break; case PROP_REFERER: g_free (priv->options.referer); priv->options.referer = g_value_dup_string (value); break; case PROP_FOLLOW_LOCATION: priv->options.follow_location = g_value_get_long (value); break; case PROP_CHECK_FILE_SERVER_TIME: priv->options.check_file_server_time = g_value_get_boolean (value); break; case PROP_USE_ETAG: priv->options.use_etag = g_value_get_boolean (value); break; case PROP_IS_DIRECT_FILE_ACCESS: priv->is_direct_file_access = g_value_get_boolean (value); break; case PROP_IS_MBTILES: priv->is_mbtiles = g_value_get_boolean (value); break; default: /* We don't have any other property... */ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); break; } } static void vik_slippy_map_source_get_property (GObject *object, guint property_id, GValue *value, GParamSpec *pspec) { VikSlippyMapSource *self = VIK_SLIPPY_MAP_SOURCE (object); VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE (self); switch (property_id) { case PROP_HOSTNAME: g_value_set_string (value, priv->hostname); break; case PROP_URL: g_value_set_string (value, priv->url); break; case PROP_REFERER: g_value_set_string (value, priv->options.referer); break; case PROP_FOLLOW_LOCATION: g_value_set_long (value, priv->options.follow_location); break; case PROP_CHECK_FILE_SERVER_TIME: g_value_set_boolean (value, priv->options.check_file_server_time); break; case PROP_USE_ETAG: g_value_set_boolean (value, priv->options.use_etag); break; case PROP_IS_DIRECT_FILE_ACCESS: g_value_set_boolean (value, priv->is_direct_file_access); break; case PROP_IS_MBTILES: g_value_set_boolean (value, priv->is_mbtiles); break; default: /* We don't have any other property... */ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); break; } } static void vik_slippy_map_source_class_init (VikSlippyMapSourceClass *klass) { GObjectClass* object_class = G_OBJECT_CLASS (klass); VikMapSourceClass* grandparent_class = VIK_MAP_SOURCE_CLASS (klass); VikMapSourceDefaultClass* parent_class = VIK_MAP_SOURCE_DEFAULT_CLASS (klass); GParamSpec *pspec = NULL; object_class->set_property = vik_slippy_map_source_set_property; object_class->get_property = vik_slippy_map_source_get_property; /* Overiding methods */ grandparent_class->coord_to_mapcoord = _coord_to_mapcoord; grandparent_class->mapcoord_to_center_coord = _mapcoord_to_center_coord; grandparent_class->is_direct_file_access = _is_direct_file_access; grandparent_class->is_mbtiles = _is_mbtiles; grandparent_class->supports_download_only_new = _supports_download_only_new; parent_class->get_uri = _get_uri; parent_class->get_hostname = _get_hostname; parent_class->get_download_options = _get_download_options; pspec = g_param_spec_string ("hostname", "Hostname", "The hostname of the map server", "" /* default value */, G_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_HOSTNAME, pspec); pspec = g_param_spec_string ("url", "URL", "The template of the tiles' URL", "" /* default value */, G_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_URL, pspec); pspec = g_param_spec_string ("referer", "Referer", "The REFERER string to use in HTTP request", NULL /* default value */, G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_REFERER, pspec); pspec = g_param_spec_long ("follow-location", "Follow location", "Specifies the number of retries to follow a redirect while downloading a page", 0 /* minimum value */, G_MAXLONG /* maximum value */, 0 /* default value */, G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_FOLLOW_LOCATION, pspec); pspec = g_param_spec_boolean ("check-file-server-time", "Check file server time", "Age of current cache before redownloading tile", FALSE /* default value */, G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_CHECK_FILE_SERVER_TIME, pspec); pspec = g_param_spec_boolean ("use-etag", "Use etag values with server", "Store etag in a file, and send it to server to check if we have the latest file", FALSE /* default value */, G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_USE_ETAG, pspec); pspec = g_param_spec_boolean ("use-direct-file-access", "Use direct file access", "Use direct file access to OSM like tile images - no need for a webservice", FALSE /* default value */, G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_IS_DIRECT_FILE_ACCESS, pspec); pspec = g_param_spec_boolean ("is-mbtiles", "Is an SQL MBTiles File", "Use an SQL MBTiles File for the tileset - no need for a webservice", FALSE /* default value */, G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_IS_MBTILES, pspec); g_type_class_add_private (klass, sizeof (VikSlippyMapSourcePrivate)); object_class->finalize = vik_slippy_map_source_finalize; } static gboolean _is_direct_file_access (VikMapSource *self) { g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE(self), FALSE); VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE(self); return priv->is_direct_file_access; } static gboolean _is_mbtiles (VikMapSource *self) { g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE(self), FALSE); VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE(self); return priv->is_mbtiles; } static gboolean _supports_download_only_new (VikMapSource *self) { g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE(self), FALSE); VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE(self); return priv->options.check_file_server_time || priv->options.use_etag; } static gboolean _coord_to_mapcoord ( VikMapSource *self, const VikCoord *src, gdouble xzoom, gdouble yzoom, MapCoord *dest ) { g_assert ( src->mode == VIK_COORD_LATLON ); if ( xzoom != yzoom ) return FALSE; dest->scale = map_utils_mpp_to_scale ( xzoom ); if ( dest->scale == 255 ) return FALSE; dest->x = (src->east_west + 180) / 360 * VIK_GZ(17) / xzoom; dest->y = (180 - MERCLAT(src->north_south)) / 360 * VIK_GZ(17) / xzoom; dest->z = 0; return TRUE; } static void _mapcoord_to_center_coord ( VikMapSource *self, MapCoord *src, VikCoord *dest ) { gdouble socalled_mpp; if (src->scale >= 0) socalled_mpp = VIK_GZ(src->scale); else socalled_mpp = 1.0/VIK_GZ(-src->scale); dest->mode = VIK_COORD_LATLON; dest->east_west = ((src->x+0.5) / VIK_GZ(17) * socalled_mpp * 360) - 180; dest->north_south = DEMERCLAT(180 - ((src->y+0.5) / VIK_GZ(17) * socalled_mpp * 360)); } static gchar * _get_uri( VikMapSourceDefault *self, MapCoord *src ) { g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE(self), NULL); VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE(self); gchar *uri = g_strdup_printf (priv->url, 17 - src->scale, src->x, src->y); return uri; } static gchar * _get_hostname( VikMapSourceDefault *self ) { g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE(self), NULL); VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE(self); return g_strdup( priv->hostname ); } static DownloadMapOptions * _get_download_options( VikMapSourceDefault *self ) { g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE(self), NULL); VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE(self); return &(priv->options); } VikSlippyMapSource * vik_slippy_map_source_new_with_id (guint16 id, const gchar *label, const gchar *hostname, const gchar *url) { return g_object_new(VIK_TYPE_SLIPPY_MAP_SOURCE, "id", id, "label", label, "hostname", hostname, "url", url, NULL); }