[andy/viking.git] / src / terraservermapsource.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
/*
 * viking
 * Copyright (C) Guilhem Bonnefille 2009 <guilhem.bonnefille@gmail.com>
 * 
 * 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 <http://www.gnu.org/licenses/>.
 */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#ifdef HAVE_MATH_H
#include <math.h>
#endif

#include "globals.h"
#include "terraservermapsource.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 int _download ( VikMapSource *self, MapCoord *src, const gchar *dest_fn );

/* FIXME Huge gruik */
static DownloadOptions terraserver_options = { NULL, 0, a_check_map_file };

typedef struct _TerraserverMapSourcePrivate TerraserverMapSourcePrivate;
struct _TerraserverMapSourcePrivate
{
  guint8 type;
};

#define TERRASERVER_MAP_SOURCE_PRIVATE(o)  (G_TYPE_INSTANCE_GET_PRIVATE ((o), TERRASERVER_TYPE_MAP_SOURCE, TerraserverMapSourcePrivate))

/* properties */
enum
{
  PROP_0,

  PROP_TYPE,
};

G_DEFINE_TYPE_EXTENDED (TerraserverMapSource, terraserver_map_source, VIK_TYPE_MAP_SOURCE_DEFAULT, (GTypeFlags)0,);

static void
terraserver_map_source_init (TerraserverMapSource *self)
{
	/* initialize the object here */
	g_object_set (G_OBJECT (self),
	              "tilesize-x", 200,
	              "tilesize-y", 200,
	              "drawmode", VIK_VIEWPORT_DRAWMODE_UTM,
	              NULL);
}

static void
terraserver_map_source_finalize (GObject *object)
{
	/* TODO: Add deinitalization code here */

	G_OBJECT_CLASS (terraserver_map_source_parent_class)->finalize (object);
}

static void
terraserver_map_source_set_property (GObject      *object,
                                     guint         property_id,
                                     const GValue *value,
                                     GParamSpec   *pspec)
{
  TerraserverMapSource *self = TERRASERVER_MAP_SOURCE (object);
  TerraserverMapSourcePrivate *priv = TERRASERVER_MAP_SOURCE_PRIVATE (self);

  switch (property_id)
    {
    case PROP_TYPE:
      priv->type = g_value_get_uint (value);
      break;

    default:
      /* We don't have any other property... */
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
      break;
    }
}

static void
terraserver_map_source_get_property (GObject    *object,
                                     guint       property_id,
                                     GValue     *value,
                                     GParamSpec *pspec)
{
  TerraserverMapSource *self = TERRASERVER_MAP_SOURCE (object);
  TerraserverMapSourcePrivate *priv = TERRASERVER_MAP_SOURCE_PRIVATE (self);

  switch (property_id)
    {
    case PROP_TYPE:
      g_value_set_uint (value, priv->type);
      break;

    default:
      /* We don't have any other property... */
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
      break;
    }
}

static void
terraserver_map_source_class_init (TerraserverMapSourceClass *klass)
{
	GObjectClass* object_class = G_OBJECT_CLASS (klass);
	VikMapSourceClass* parent_class = VIK_MAP_SOURCE_CLASS (klass);
    GParamSpec *pspec = NULL;
	
	object_class->set_property = terraserver_map_source_set_property;
    object_class->get_property = terraserver_map_source_get_property;
	
	/* Overiding methods */
	parent_class->coord_to_mapcoord =        _coord_to_mapcoord;
	parent_class->mapcoord_to_center_coord = _mapcoord_to_center_coord;
	parent_class->download =                 _download;

	pspec = g_param_spec_uint ("type",
	                           "Type",
                               "Type of Terraserver map",
                               0  /* minimum value */,
                               G_MAXUINT8 /* maximum value */,
                               0  /* default value */,
                               G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE);
	g_object_class_install_property (object_class, PROP_TYPE, pspec);

	g_type_class_add_private (klass, sizeof (TerraserverMapSourcePrivate));
	
	object_class->finalize = terraserver_map_source_finalize;
}

#define TERRASERVER_SITE "terraserver-usa.com"
#define MARGIN_OF_ERROR 0.001

static int mpp_to_scale ( gdouble mpp, guint8 type )
{
  mpp *= 4;
  gint t = (gint) mpp;
  if ( ABS(mpp - t) > MARGIN_OF_ERROR )
    return FALSE;

  switch ( t ) {
    case 1: return (type == 4) ? 8 : 0;
    case 2: return (type == 4) ? 9 : 0;
    case 4: return (type != 2) ? 10 : 0;
    case 8: return 11;
    case 16: return 12;
    case 32: return 13;
    case 64: return 14;
    case 128: return 15;
    case 256: return 16;
    case 512: return 17;
    case 1024: return 18;
    case 2048: return 19;
    default: return 0;
  }
}

static gdouble scale_to_mpp ( gint scale )
{
  return pow(2,scale - 10);
}

static gboolean
_coord_to_mapcoord ( VikMapSource *self, const VikCoord *src, gdouble xmpp, gdouble ympp, MapCoord *dest )
{
	g_return_val_if_fail(TERRASERVER_IS_MAP_SOURCE(self), FALSE);
	
	TerraserverMapSourcePrivate *priv = TERRASERVER_MAP_SOURCE_PRIVATE(self);
	int type = priv->type;
	g_assert ( src->mode == VIK_COORD_UTM );

	if ( xmpp != ympp )
		return FALSE;

	dest->scale = mpp_to_scale ( xmpp, type );
	if ( ! dest->scale )
		return FALSE;

	dest->x = (gint)(((gint)(src->east_west))/(200*xmpp));
	dest->y = (gint)(((gint)(src->north_south))/(200*xmpp));
	dest->z = src->utm_zone;
	return TRUE;
}

static void
_mapcoord_to_center_coord ( VikMapSource *self, MapCoord *src, VikCoord *dest )
{
	// FIXME: slowdown here!
	gdouble mpp = scale_to_mpp ( src->scale );
	dest->mode = VIK_COORD_UTM;
	dest->utm_zone = src->z;
	dest->east_west = ((src->x * 200) + 100) * mpp;
	dest->north_south = ((src->y * 200) + 100) * mpp;
}

static int
_download ( VikMapSource *self, MapCoord *src, const gchar *dest_fn )
{
	g_return_val_if_fail(TERRASERVER_IS_MAP_SOURCE(self), FALSE);
	
	TerraserverMapSourcePrivate *priv = TERRASERVER_MAP_SOURCE_PRIVATE(self);  int res = -1;
	int type = priv->type;
	gchar *uri = g_strdup_printf ( "/tile.ashx?T=%d&S=%d&X=%d&Y=%d&Z=%d", type,
                                  src->scale, src->x, src->y, src->z );
	res = a_http_download_get_url ( TERRASERVER_SITE, uri, dest_fn, &terraserver_options );
	g_free ( uri );
	return res;
}

TerraserverMapSource *
terraserver_map_source_new_with_id (guint8 id, const char *label, int type)
{
	return g_object_new(TERRASERVER_TYPE_MAP_SOURCE, "id", id, "label", label, "type", type, NULL);
}
Commit	Line	Data
c9c9e658 GB	1	/* -- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -- */
	2	/*
	3	* viking
	4	* Copyright (C) Guilhem Bonnefille 2009 <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 int _download ( VikMapSource self, MapCoord src, const gchar *dest_fn );
	33
	34	/* FIXME Huge gruik */
	35	static DownloadOptions terraserver_options = { NULL, 0, a_check_map_file };
	36
	37	typedef struct _TerraserverMapSourcePrivate TerraserverMapSourcePrivate;
	38	struct _TerraserverMapSourcePrivate
	39	{
e76eccdc	40	guint8 type;
c9c9e658 GB	41	};
	42
	43	#define TERRASERVER_MAP_SOURCE_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), TERRASERVER_TYPE_MAP_SOURCE, TerraserverMapSourcePrivate))
	44
e76eccdc GB	45	/* properties */
	46	enum
	47	{
	48	PROP_0,
	49
	50	PROP_TYPE,
	51	};
	52
c9c9e658 GB	53	G_DEFINE_TYPE_EXTENDED (TerraserverMapSource, terraserver_map_source, VIK_TYPE_MAP_SOURCE_DEFAULT, (GTypeFlags)0,);
	54
	55	static void
3a84e537	56	terraserver_map_source_init (TerraserverMapSource *self)
c9c9e658 GB	57	{
c9c9e658 GB	58	/* initialize the object here */
31f3c5e7 GB	59	g_object_set (G_OBJECT (self),
	60	"tilesize-x", 200,
	61	"tilesize-y", 200,
	62	"drawmode", VIK_VIEWPORT_DRAWMODE_UTM,
	63	NULL);
c9c9e658 GB	64	}
	65
	66	static void
	67	terraserver_map_source_finalize (GObject *object)
	68	{
	69	/* TODO: Add deinitalization code here */
	70
	71	G_OBJECT_CLASS (terraserver_map_source_parent_class)->finalize (object);
	72	}
	73
e76eccdc GB	74	static void
	75	terraserver_map_source_set_property (GObject *object,
	76	guint property_id,
	77	const GValue *value,
	78	GParamSpec *pspec)
	79	{
	80	TerraserverMapSource *self = TERRASERVER_MAP_SOURCE (object);
	81	TerraserverMapSourcePrivate *priv = TERRASERVER_MAP_SOURCE_PRIVATE (self);
	82
	83	switch (property_id)
	84	{
	85	case PROP_TYPE:
	86	priv->type = g_value_get_uint (value);
	87	break;
	88
	89	default:
	90	/* We don't have any other property... */
	91	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
	92	break;
	93	}
	94	}
	95
	96	static void
	97	terraserver_map_source_get_property (GObject *object,
	98	guint property_id,
	99	GValue *value,
	100	GParamSpec *pspec)
	101	{
	102	TerraserverMapSource *self = TERRASERVER_MAP_SOURCE (object);
	103	TerraserverMapSourcePrivate *priv = TERRASERVER_MAP_SOURCE_PRIVATE (self);
	104
	105	switch (property_id)
	106	{
	107	case PROP_TYPE:
	108	g_value_set_uint (value, priv->type);
	109	break;
	110
	111	default:
	112	/* We don't have any other property... */
	113	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
	114	break;
	115	}
	116	}
	117
c9c9e658 GB	118	static void
	119	terraserver_map_source_class_init (TerraserverMapSourceClass *klass)
	120	{
	121	GObjectClass* object_class = G_OBJECT_CLASS (klass);
	122	VikMapSourceClass* parent_class = VIK_MAP_SOURCE_CLASS (klass);
e76eccdc GB	123	GParamSpec *pspec = NULL;
	124
	125	object_class->set_property = terraserver_map_source_set_property;
	126	object_class->get_property = terraserver_map_source_get_property;
	127
c9c9e658 GB	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;
e76eccdc GB	132
	133	pspec = g_param_spec_uint ("type",
	134	"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);
	141
c9c9e658 GB	142	g_type_class_add_private (klass, sizeof (TerraserverMapSourcePrivate));
	143
	144	object_class->finalize = terraserver_map_source_finalize;
	145	}
	146
	147	#define TERRASERVER_SITE "terraserver-usa.com"
	148	#define MARGIN_OF_ERROR 0.001
	149
	150	static int mpp_to_scale ( gdouble mpp, guint8 type )
	151	{
	152	mpp *= 4;
	153	gint t = (gint) mpp;
	154	if ( ABS(mpp - t) > MARGIN_OF_ERROR )
	155	return FALSE;
	156
	157	switch ( t ) {
	158	case 1: return (type == 4) ? 8 : 0;
	159	case 2: return (type == 4) ? 9 : 0;
	160	case 4: return (type != 2) ? 10 : 0;
	161	case 8: return 11;
	162	case 16: return 12;
	163	case 32: return 13;
	164	case 64: return 14;
	165	case 128: return 15;
	166	case 256: return 16;
	167	case 512: return 17;
	168	case 1024: return 18;
	169	case 2048: return 19;
	170	default: return 0;
	171	}
	172	}
	173
	174	static gdouble scale_to_mpp ( gint scale )
	175	{
	176	return pow(2,scale - 10);
	177	}
	178
	179	static gboolean
	180	_coord_to_mapcoord ( VikMapSource self, const VikCoord src, gdouble xmpp, gdouble ympp, MapCoord *dest )
	181	{
	182	g_return_val_if_fail(TERRASERVER_IS_MAP_SOURCE(self), FALSE);
	183
	184	TerraserverMapSourcePrivate *priv = TERRASERVER_MAP_SOURCE_PRIVATE(self);
	185	int type = priv->type;
	186	g_assert ( src->mode == VIK_COORD_UTM );
	187
	188	if ( xmpp != ympp )
	189	return FALSE;
	190
	191	dest->scale = mpp_to_scale ( xmpp, type );
	192	if ( ! dest->scale )
	193	return FALSE;
	194
	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;
	198	return TRUE;
	199	}
	200
	201	static void
	202	_mapcoord_to_center_coord ( VikMapSource self, MapCoord src, VikCoord *dest )
	203	{
	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;
210	}
211
212	static int
213	_download ( VikMapSource self, MapCoord src, const gchar *dest_fn )
214	{
215	g_return_val_if_fail(TERRASERVER_IS_MAP_SOURCE(self), FALSE);
216
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 );
222	g_free ( uri );
223	return res;
224	}
225
226	TerraserverMapSource *
db03733a	227	terraserver_map_source_new_with_id (guint8 id, const char *label, int type)
c9c9e658	228	{
db03733a	229	return g_object_new(TERRASERVER_TYPE_MAP_SOURCE, "id", id, "label", label, "type", type, NULL);
c9c9e658	230	}