src/terraservermapsource.c

   1 /* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
   2 /*
   3  * viking
   4  * Copyright (C) 2009, Guilhem Bonnefille <guilhem.bonnefille@gmail.com>
   5  *
   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.
  10  *
  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.
  15  *
  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/>.
  18  */
  19 #ifdef HAVE_CONFIG_H
  20 #include "config.h"
  21 #endif
  22
  23 #ifdef HAVE_MATH_H
  24 #include <math.h>
  25 #endif
  26
  27 #include "globals.h"
  28 #include "terraservermapsource.h"
  29
  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 gboolean _is_direct_file_access ( VikMapSource *self );
  33 static gboolean _is_mbtiles ( VikMapSource *self );
  34
  35 static gchar *_get_uri( VikMapSourceDefault *self, MapCoord *src );
  36 static gchar *_get_hostname( VikMapSourceDefault *self );
  37 static DownloadFileOptions *_get_download_options( VikMapSourceDefault *self );
  38
  39 /* FIXME Huge gruik */
  40 static DownloadFileOptions terraserver_options = { FALSE, FALSE, NULL, 0, a_check_map_file, NULL, NULL };
  41
  42 typedef struct _TerraserverMapSourcePrivate TerraserverMapSourcePrivate;
  43 struct _TerraserverMapSourcePrivate
  44 {
  45   guint8 type;
  46 };
  47
  48 #define TERRASERVER_MAP_SOURCE_PRIVATE(o)  (G_TYPE_INSTANCE_GET_PRIVATE ((o), TERRASERVER_TYPE_MAP_SOURCE, TerraserverMapSourcePrivate))
  49
  50 /* properties */
  51 enum
  52 {
  53   PROP_0,
  54
  55   PROP_TYPE,
  56 };
  57
  58 G_DEFINE_TYPE (TerraserverMapSource, terraserver_map_source, VIK_TYPE_MAP_SOURCE_DEFAULT);
  59
  60 static void
  61 terraserver_map_source_init (TerraserverMapSource *self)
  62 {
  63         /* initialize the object here */
  64         g_object_set (G_OBJECT (self),
  65                       "tilesize-x", 200,
  66                       "tilesize-y", 200,
  67                       "drawmode", VIK_VIEWPORT_DRAWMODE_UTM,
  68                       NULL);
  69 }
  70
  71 static void
  72 terraserver_map_source_finalize (GObject *object)
  73 {
  74         /* TODO: Add deinitalization code here */
  75
  76         G_OBJECT_CLASS (terraserver_map_source_parent_class)->finalize (object);
  77 }
  78
  79 static void
  80 terraserver_map_source_set_property (GObject      *object,
  81                                      guint         property_id,
  82                                      const GValue *value,
  83                                      GParamSpec   *pspec)
  84 {
  85   TerraserverMapSource *self = TERRASERVER_MAP_SOURCE (object);
  86   TerraserverMapSourcePrivate *priv = TERRASERVER_MAP_SOURCE_PRIVATE (self);
  87
  88   switch (property_id)
  89     {
  90     case PROP_TYPE:
  91       priv->type = g_value_get_uint (value);
  92       break;
  93
  94     default:
  95       /* We don't have any other property... */
  96       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
  97       break;
  98     }
  99 }
 100
 101 static void
 102 terraserver_map_source_get_property (GObject    *object,
 103                                      guint       property_id,
 104                                      GValue     *value,
 105                                      GParamSpec *pspec)
 106 {
 107   TerraserverMapSource *self = TERRASERVER_MAP_SOURCE (object);
 108   TerraserverMapSourcePrivate *priv = TERRASERVER_MAP_SOURCE_PRIVATE (self);
 109
 110   switch (property_id)
 111     {
 112     case PROP_TYPE:
 113       g_value_set_uint (value, priv->type);
 114       break;
 115
 116     default:
 117       /* We don't have any other property... */
 118       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
 119       break;
 120     }
 121 }
 122
 123 static void
 124 terraserver_map_source_class_init (TerraserverMapSourceClass *klass)
 125 {
 126         GObjectClass* object_class = G_OBJECT_CLASS (klass);
 127         VikMapSourceClass* grandparent_class = VIK_MAP_SOURCE_CLASS (klass);
 128         VikMapSourceDefaultClass* parent_class = VIK_MAP_SOURCE_DEFAULT_CLASS (klass);
 129     GParamSpec *pspec = NULL;
 130
 131         object_class->set_property = terraserver_map_source_set_property;
 132     object_class->get_property = terraserver_map_source_get_property;
 133
 134         /* Overiding methods */
 135         grandparent_class->coord_to_mapcoord =        _coord_to_mapcoord;
 136         grandparent_class->mapcoord_to_center_coord = _mapcoord_to_center_coord;
 137         grandparent_class->is_direct_file_access = _is_direct_file_access;
 138         grandparent_class->is_mbtiles = _is_mbtiles;
 139
 140         parent_class->get_uri = _get_uri;
 141         parent_class->get_hostname = _get_hostname;
 142         parent_class->get_download_options = _get_download_options;
 143
 144         pspec = g_param_spec_uint ("type",
 145                                    "Type",
 146                                "Type of Terraserver map",
 147                                0  /* minimum value */,
 148                                G_MAXUINT8 /* maximum value */,
 149                                0  /* default value */,
 150                                G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE);
 151         g_object_class_install_property (object_class, PROP_TYPE, pspec);
 152
 153         g_type_class_add_private (klass, sizeof (TerraserverMapSourcePrivate));
 154
 155         object_class->finalize = terraserver_map_source_finalize;
 156 }
 157
 158 #define TERRASERVER_SITE "msrmaps.com"
 159 #define MARGIN_OF_ERROR 0.001
 160
 161 static int mpp_to_scale ( gdouble mpp, guint8 type )
 162 {
 163   mpp *= 4;
 164   gint t = (gint) mpp;
 165   if ( ABS(mpp - t) > MARGIN_OF_ERROR )
 166     return FALSE;
 167
 168   switch ( t ) {
 169     case 1: return (type == 4) ? 8 : 0;
 170     case 2: return (type == 4) ? 9 : 0;
 171     case 4: return (type != 2) ? 10 : 0;
 172     case 8: return 11;
 173     case 16: return 12;
 174     case 32: return 13;
 175     case 64: return 14;
 176     case 128: return 15;
 177     case 256: return 16;
 178     case 512: return 17;
 179     case 1024: return 18;
 180     case 2048: return 19;
 181     default: return 0;
 182   }
 183 }
 184
 185 static gdouble scale_to_mpp ( gint scale )
 186 {
 187   return pow(2,scale - 10);
 188 }
 189
 190 static gboolean
 191 _coord_to_mapcoord ( VikMapSource *self, const VikCoord *src, gdouble xmpp, gdouble ympp, MapCoord *dest )
 192 {
 193         g_return_val_if_fail(TERRASERVER_IS_MAP_SOURCE(self), FALSE);
 194
 195         TerraserverMapSourcePrivate *priv = TERRASERVER_MAP_SOURCE_PRIVATE(self);
 196         int type = priv->type;
 197         if ( src->mode != VIK_COORD_UTM )
 198                 return FALSE;
 199
 200         if ( xmpp != ympp )
 201                 return FALSE;
 202
 203         dest->scale = mpp_to_scale ( xmpp, type );
 204         if ( ! dest->scale )
 205                 return FALSE;
 206
 207         dest->x = (gint)(((gint)(src->east_west))/(200*xmpp));
 208         dest->y = (gint)(((gint)(src->north_south))/(200*xmpp));
 209         dest->z = src->utm_zone;
 210         return TRUE;
 211 }
 212
 213 static gboolean
 214 _is_direct_file_access ( VikMapSource *self )
 215 {
 216         return FALSE;
 217 }
 218
 219 static gboolean
 220 _is_mbtiles ( VikMapSource *self )
 221 {
 222         return FALSE;
 223 }
 224
 225 static void
 226 _mapcoord_to_center_coord ( VikMapSource *self, MapCoord *src, VikCoord *dest )
 227 {
 228         // FIXME: slowdown here!
 229         gdouble mpp = scale_to_mpp ( src->scale );
 230         dest->mode = VIK_COORD_UTM;
 231         dest->utm_zone = src->z;
 232         dest->east_west = ((src->x * 200) + 100) * mpp;
 233         dest->north_south = ((src->y * 200) + 100) * mpp;
 234 }
 235
 236 static gchar *
 237 _get_uri( VikMapSourceDefault *self, MapCoord *src )
 238 {
 239         g_return_val_if_fail (TERRASERVER_IS_MAP_SOURCE(self), NULL);
 240
 241         TerraserverMapSourcePrivate *priv = TERRASERVER_MAP_SOURCE_PRIVATE(self);
 242         int type = priv->type;
 243         gchar *uri = g_strdup_printf ( "/tile.ashx?T=%d&S=%d&X=%d&Y=%d&Z=%d", type,
 244                                   src->scale, src->x, src->y, src->z );
 245         return uri;
 246 }
 247
 248 static gchar *
 249 _get_hostname( VikMapSourceDefault *self )
 250 {
 251         g_return_val_if_fail (TERRASERVER_IS_MAP_SOURCE(self), NULL);
 252
 253         return g_strdup( TERRASERVER_SITE );
 254 }
 255
 256 static DownloadFileOptions *
 257 _get_download_options( VikMapSourceDefault *self )
 258 {
 259         g_return_val_if_fail (TERRASERVER_IS_MAP_SOURCE(self), NULL);
 260
 261         return &terraserver_options;
 262 }
 263
 264 TerraserverMapSource *
 265 terraserver_map_source_new_with_id (guint16 id, const char *label, int type)
 266 {
 267         char *copyright = NULL;
 268         switch (type)
 269         {
 270         case 1:
 271                 copyright = "© DigitalGlobe";
 272                 break;
 273         case 2:
 274                 copyright = "© LandVoyage";
 275                 break;
 276         case 4:
 277                 copyright = "© DigitalGlobe";
 278                 break;
 279         default:
 280                 g_critical("Houston, we've had a problem. type=%d", type);
 281         }
 282
 283         return g_object_new(TERRASERVER_TYPE_MAP_SOURCE,
 284                             "id", id, "label", label, "type", type,
 285                             "copyright", copyright,
 286                             NULL);
 287 }