1 /* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
4 * Copyright (C) Guilhem Bonnefille 2009 <guilhem.bonnefille@gmail.com>
6 * viking is free software: you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * viking is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
14 * See the GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program. If not, see <http://www.gnu.org/licenses/>.
28 #include "terraservermapsource.h"
30 static gboolean _coord_to_mapcoord ( VikMapSource *self, const VikCoord *src, gdouble xzoom, gdouble yzoom, MapCoord *dest );
31 static void _mapcoord_to_center_coord ( VikMapSource *self, MapCoord *src, VikCoord *dest );
32 static int _download ( VikMapSource *self, MapCoord *src, const gchar *dest_fn );
34 /* FIXME Huge gruik */
35 static DownloadOptions terraserver_options = { NULL, 0, a_check_map_file };
37 typedef struct _TerraserverMapSourcePrivate TerraserverMapSourcePrivate;
38 struct _TerraserverMapSourcePrivate
43 #define TERRASERVER_MAP_SOURCE_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), TERRASERVER_TYPE_MAP_SOURCE, TerraserverMapSourcePrivate))
53 G_DEFINE_TYPE_EXTENDED (TerraserverMapSource, terraserver_map_source, VIK_TYPE_MAP_SOURCE_DEFAULT, (GTypeFlags)0,);
56 terraserver_map_source_init (TerraserverMapSource *self)
58 /* initialize the object here */
59 g_object_set (G_OBJECT (self),
62 "drawmode", VIK_VIEWPORT_DRAWMODE_UTM,
67 terraserver_map_source_finalize (GObject *object)
69 /* TODO: Add deinitalization code here */
71 G_OBJECT_CLASS (terraserver_map_source_parent_class)->finalize (object);
75 terraserver_map_source_set_property (GObject *object,
80 TerraserverMapSource *self = TERRASERVER_MAP_SOURCE (object);
81 TerraserverMapSourcePrivate *priv = TERRASERVER_MAP_SOURCE_PRIVATE (self);
86 priv->type = g_value_get_uint (value);
90 /* We don't have any other property... */
91 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
97 terraserver_map_source_get_property (GObject *object,
102 TerraserverMapSource *self = TERRASERVER_MAP_SOURCE (object);
103 TerraserverMapSourcePrivate *priv = TERRASERVER_MAP_SOURCE_PRIVATE (self);
108 g_value_set_uint (value, priv->type);
112 /* We don't have any other property... */
113 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
119 terraserver_map_source_class_init (TerraserverMapSourceClass *klass)
121 GObjectClass* object_class = G_OBJECT_CLASS (klass);
122 VikMapSourceClass* parent_class = VIK_MAP_SOURCE_CLASS (klass);
123 GParamSpec *pspec = NULL;
125 object_class->set_property = terraserver_map_source_set_property;
126 object_class->get_property = terraserver_map_source_get_property;
128 /* Overiding methods */
129 parent_class->coord_to_mapcoord = _coord_to_mapcoord;
130 parent_class->mapcoord_to_center_coord = _mapcoord_to_center_coord;
131 parent_class->download = _download;
133 pspec = g_param_spec_uint ("type",
135 "Type of Terraserver map",
136 0 /* minimum value */,
137 G_MAXUINT8 /* maximum value */,
138 0 /* default value */,
139 G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE);
140 g_object_class_install_property (object_class, PROP_TYPE, pspec);
142 g_type_class_add_private (klass, sizeof (TerraserverMapSourcePrivate));
144 object_class->finalize = terraserver_map_source_finalize;
147 #define TERRASERVER_SITE "terraserver-usa.com"
148 #define MARGIN_OF_ERROR 0.001
150 static int mpp_to_scale ( gdouble mpp, guint8 type )
154 if ( ABS(mpp - t) > MARGIN_OF_ERROR )
158 case 1: return (type == 4) ? 8 : 0;
159 case 2: return (type == 4) ? 9 : 0;
160 case 4: return (type != 2) ? 10 : 0;
168 case 1024: return 18;
169 case 2048: return 19;
174 static gdouble scale_to_mpp ( gint scale )
176 return pow(2,scale - 10);
180 _coord_to_mapcoord ( VikMapSource *self, const VikCoord *src, gdouble xmpp, gdouble ympp, MapCoord *dest )
182 g_return_val_if_fail(TERRASERVER_IS_MAP_SOURCE(self), FALSE);
184 TerraserverMapSourcePrivate *priv = TERRASERVER_MAP_SOURCE_PRIVATE(self);
185 int type = priv->type;
186 g_assert ( src->mode == VIK_COORD_UTM );
191 dest->scale = mpp_to_scale ( xmpp, type );
195 dest->x = (gint)(((gint)(src->east_west))/(200*xmpp));
196 dest->y = (gint)(((gint)(src->north_south))/(200*xmpp));
197 dest->z = src->utm_zone;
202 _mapcoord_to_center_coord ( VikMapSource *self, MapCoord *src, VikCoord *dest )
204 // FIXME: slowdown here!
205 gdouble mpp = scale_to_mpp ( src->scale );
206 dest->mode = VIK_COORD_UTM;
207 dest->utm_zone = src->z;
208 dest->east_west = ((src->x * 200) + 100) * mpp;
209 dest->north_south = ((src->y * 200) + 100) * mpp;
213 _download ( VikMapSource *self, MapCoord *src, const gchar *dest_fn )
215 g_return_val_if_fail(TERRASERVER_IS_MAP_SOURCE(self), FALSE);
217 TerraserverMapSourcePrivate *priv = TERRASERVER_MAP_SOURCE_PRIVATE(self); int res = -1;
218 int type = priv->type;
219 gchar *uri = g_strdup_printf ( "/tile.ashx?T=%d&S=%d&X=%d&Y=%d&Z=%d", type,
220 src->scale, src->x, src->y, src->z );
221 res = a_http_download_get_url ( TERRASERVER_SITE, uri, dest_fn, &terraserver_options );
226 TerraserverMapSource *
227 terraserver_map_source_new_with_id (guint8 id, const char *label, int type)
229 return g_object_new(TERRASERVER_TYPE_MAP_SOURCE, "id", id, "label", label, "type", type, NULL);