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

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
/*
 * viking
 * Copyright (C) 2010, Guilhem Bonnefille <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 "viktmsmapsource.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 _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 _VikTmsMapSourcePrivate VikTmsMapSourcePrivate;
struct _VikTmsMapSourcePrivate
{
  gchar *hostname;
  gchar *url;
  DownloadMapOptions options;
};

#define VIK_TMS_MAP_SOURCE_PRIVATE(o)  (G_TYPE_INSTANCE_GET_PRIVATE ((o), VIK_TYPE_TMS_MAP_SOURCE, VikTmsMapSourcePrivate))

/* properties */
enum
{
  PROP_0,

  PROP_HOSTNAME,
  PROP_URL,
  PROP_REFERER,
  PROP_FOLLOW_LOCATION,
  PROP_CHECK_FILE_SERVER_TIME,
};

G_DEFINE_TYPE (VikTmsMapSource, vik_tms_map_source, VIK_TYPE_MAP_SOURCE_DEFAULT);

static void
vik_tms_map_source_init (VikTmsMapSource *self)
{
  /* initialize the object here */
  VikTmsMapSourcePrivate *priv = VIK_TMS_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;

  g_object_set (G_OBJECT (self),
                "tilesize-x", 256,
                "tilesize-y", 256,
                "drawmode", VIK_VIEWPORT_DRAWMODE_LATLON,
                NULL);
}

static void
vik_tms_map_source_finalize (GObject *object)
{
  VikTmsMapSource *self = VIK_TMS_MAP_SOURCE (object);
  VikTmsMapSourcePrivate *priv = VIK_TMS_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_tms_map_source_parent_class)->finalize (object);
}

static void
vik_tms_map_source_set_property (GObject      *object,
                                    guint         property_id,
                                    const GValue *value,
                                    GParamSpec   *pspec)
{
  VikTmsMapSource *self = VIK_TMS_MAP_SOURCE (object);
  VikTmsMapSourcePrivate *priv = VIK_TMS_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;

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

static void
vik_tms_map_source_get_property (GObject    *object,
                                    guint       property_id,
                                    GValue     *value,
                                    GParamSpec *pspec)
{
  VikTmsMapSource *self = VIK_TMS_MAP_SOURCE (object);
  VikTmsMapSourcePrivate *priv = VIK_TMS_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;
	  
    default:
      /* We don't have any other property... */
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
      break;
    }
}

static void
vik_tms_map_source_class_init (VikTmsMapSourceClass *klass)
{
	GObjectClass* object_class = G_OBJECT_CLASS (klass);
	VikMapSourceClass* granparent_class = VIK_MAP_SOURCE_CLASS (klass);
	VikMapSourceDefaultClass* parent_class = VIK_MAP_SOURCE_DEFAULT_CLASS (klass);
	GParamSpec *pspec = NULL;
		
	object_class->set_property = vik_tms_map_source_set_property;
    object_class->get_property = vik_tms_map_source_get_property;

	/* Overiding methods */
	granparent_class->coord_to_mapcoord =        _coord_to_mapcoord;
	granparent_class->mapcoord_to_center_coord = _mapcoord_to_center_coord;
	granparent_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",
	                             "<no-set>" /* default value */,
	                             G_PARAM_CONSTRUCT_ONLY | 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",
	                             "<no-set>" /* default value */,
	                             G_PARAM_CONSTRUCT_ONLY | 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);

	g_type_class_add_private (klass, sizeof (VikTmsMapSourcePrivate));
	
	object_class->finalize = vik_tms_map_source_finalize;
}

/* 1 << (x) is like a 2**(x) */
#define GZ(x) ((1<<(x)))

static const gdouble scale_mpps[] = { GZ(0), GZ(1), GZ(2), GZ(3), GZ(4), GZ(5), GZ(6), GZ(7), GZ(8), GZ(9),
                                           GZ(10), GZ(11), GZ(12), GZ(13), GZ(14), GZ(15), GZ(16), GZ(17) };

static const gint num_scales = (sizeof(scale_mpps) / sizeof(scale_mpps[0]));

static const gdouble scale_neg_mpps[] = { 1.0/GZ(0), 1.0/GZ(1), 1.0/GZ(2), 1.0/GZ(3) };
static const gint num_scales_neg = (sizeof(scale_neg_mpps) / sizeof(scale_neg_mpps[0]));

#define ERROR_MARGIN 0.01
static gint tms_zoom ( gdouble mpp ) {
  gint i;
  for ( i = 0; i < num_scales; i++ ) {
    if ( ABS(scale_mpps[i] - mpp) < ERROR_MARGIN ) {
      return i;
    }
  }
  for ( i = 0; i < num_scales_neg; i++ ) {
    if ( ABS(scale_neg_mpps[i] - mpp) < 0.000001 ) {
      return -i;
    }
  }

  return 255;
}

gboolean
_supports_download_only_new (VikMapSource *self)
{
	g_return_val_if_fail (VIK_IS_TMS_MAP_SOURCE(self), FALSE);
	
    VikTmsMapSourcePrivate *priv = VIK_TMS_MAP_SOURCE_PRIVATE(self);
	
	return priv->options.check_file_server_time;
}

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 = tms_zoom ( xzoom );
  if ( dest->scale == 255 )
    return FALSE;

  /* Note : GZ(17) / xzoom / 2 = number of tile on Y axis */
	g_debug("%s: xzoom=%f yzoom=%f -> %f", __FUNCTION__,
          xzoom, yzoom, GZ(17) / xzoom / 2);
  dest->x = floor((src->east_west + 180) / 180 * GZ(17) / xzoom / 2);
  /* We should restore logic of viking:
   * tile index on Y axis follow a screen logic (top -> down)
   */
  dest->y = floor((180 - (src->north_south + 90)) / 180 * GZ(17) / xzoom / 2);
  dest->z = 0;
  g_debug("%s: %f,%f -> %d,%d", __FUNCTION__,
          src->east_west, src->north_south, dest->x, dest->y);
  return TRUE;
}

static void
_mapcoord_to_center_coord ( VikMapSource *self, MapCoord *src, VikCoord *dest )
{
  gdouble socalled_mpp;
  if (src->scale >= 0)
    socalled_mpp = GZ(src->scale);
  else
    socalled_mpp = 1.0/GZ(-src->scale);
  dest->mode = VIK_COORD_LATLON;
  dest->east_west = (src->x+0.5) * 180 / GZ(17) * socalled_mpp * 2 - 180;
  /* We should restore logic of viking:
   * tile index on Y axis follow a screen logic (top -> down)
   */
  dest->north_south = -((src->y+0.5) * 180 / GZ(17) * socalled_mpp * 2 - 90);
  g_debug("%s: %d,%d -> %f,%f", __FUNCTION__,
          src->x, src->y, dest->east_west, dest->north_south);
}

static gchar *
_get_uri( VikMapSourceDefault *self, MapCoord *src )
{
	g_return_val_if_fail (VIK_IS_TMS_MAP_SOURCE(self), NULL);
	
    VikTmsMapSourcePrivate *priv = VIK_TMS_MAP_SOURCE_PRIVATE(self);
	gdouble socalled_mpp;
	if (src->scale >= 0)
		socalled_mpp = GZ(src->scale);
	else
		socalled_mpp = 1.0/GZ(-src->scale);
	/* We should restore logic of viking:
     * tile index on Y axis follow a screen logic (top -> down)
     */

	/* Note : nb tiles on Y axis */
	gint nb_tiles = GZ(17 - src->scale - 1);

	gchar *uri = g_strdup_printf (priv->url, 17 - src->scale - 1, src->x, nb_tiles - src->y - 1);
	
	return uri;
} 

static gchar *
_get_hostname( VikMapSourceDefault *self )
{
	g_return_val_if_fail (VIK_IS_TMS_MAP_SOURCE(self), NULL);
	
    VikTmsMapSourcePrivate *priv = VIK_TMS_MAP_SOURCE_PRIVATE(self);
	return g_strdup( priv->hostname );
}

static DownloadMapOptions *
_get_download_options( VikMapSourceDefault *self )
{
	g_return_val_if_fail (VIK_IS_TMS_MAP_SOURCE(self), NULL);
	
	VikTmsMapSourcePrivate *priv = VIK_TMS_MAP_SOURCE_PRIVATE(self);
	return &(priv->options);
}

VikTmsMapSource *
vik_tms_map_source_new_with_id (guint8 id, const gchar *label, const gchar *hostname, const gchar *url)
{
	return g_object_new(VIK_TYPE_TMS_MAP_SOURCE,
	                    "id", id, "label", label, "hostname", hostname, "url", url, NULL);
}
Commit	Line	Data
90f15672 GB	1	/* -- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -- */
	2	/*
	3	* viking
	4	* Copyright (C) 2010, 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
	20	#ifdef HAVE_CONFIG_H
	21	#include "config.h"
	22	#endif
	23
	24	#ifdef HAVE_MATH_H
	25	#include <math.h>
	26	#endif
	27
	28	#include "globals.h"
	29	#include "viktmsmapsource.h"
	30
	31	static gboolean _coord_to_mapcoord ( VikMapSource self, const VikCoord src, gdouble xzoom, gdouble yzoom, MapCoord *dest );
	32	static void _mapcoord_to_center_coord ( VikMapSource self, MapCoord src, VikCoord *dest );
	33	static gboolean _supports_download_only_new (VikMapSource *self );
	34
	35	static gchar _get_uri( VikMapSourceDefault self, MapCoord *src );
	36	static gchar _get_hostname( VikMapSourceDefault self );
	37	static DownloadMapOptions _get_download_options( VikMapSourceDefault self );
	38
	39	typedef struct _VikTmsMapSourcePrivate VikTmsMapSourcePrivate;
	40	struct _VikTmsMapSourcePrivate
	41	{
	42	gchar *hostname;
	43	gchar *url;
	44	DownloadMapOptions options;
	45	};
	46
	47	#define VIK_TMS_MAP_SOURCE_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), VIK_TYPE_TMS_MAP_SOURCE, VikTmsMapSourcePrivate))
	48
	49	/* properties */
	50	enum
	51	{
	52	PROP_0,
	53
	54	PROP_HOSTNAME,
	55	PROP_URL,
	56	PROP_REFERER,
	57	PROP_FOLLOW_LOCATION,
	58	PROP_CHECK_FILE_SERVER_TIME,
	59	};
	60
	61	G_DEFINE_TYPE (VikTmsMapSource, vik_tms_map_source, VIK_TYPE_MAP_SOURCE_DEFAULT);
	62
	63	static void
	64	vik_tms_map_source_init (VikTmsMapSource *self)
65	{
66	/* initialize the object here */
67	VikTmsMapSourcePrivate *priv = VIK_TMS_MAP_SOURCE_PRIVATE (self);
68
69	priv->hostname = NULL;
70	priv->url = NULL;
71	priv->options.referer = NULL;
72	priv->options.follow_location = 0;
73	priv->options.check_file = a_check_map_file;
74	priv->options.check_file_server_time = FALSE;
75
76	g_object_set (G_OBJECT (self),
77	"tilesize-x", 256,
78	"tilesize-y", 256,
79	"drawmode", VIK_VIEWPORT_DRAWMODE_LATLON,
80	NULL);
81	}
82
83	static void
84	vik_tms_map_source_finalize (GObject *object)
85	{
86	VikTmsMapSource *self = VIK_TMS_MAP_SOURCE (object);
87	VikTmsMapSourcePrivate *priv = VIK_TMS_MAP_SOURCE_PRIVATE (self);
88
89	g_free (priv->hostname);
90	priv->hostname = NULL;
91	g_free (priv->url);
92	priv->url = NULL;
93	g_free (priv->options.referer);
94	priv->options.referer = NULL;
95
96	G_OBJECT_CLASS (vik_tms_map_source_parent_class)->finalize (object);
97	}
98
99	static void
100	vik_tms_map_source_set_property (GObject *object,
101	guint property_id,
102	const GValue *value,
103	GParamSpec *pspec)
104	{
105	VikTmsMapSource *self = VIK_TMS_MAP_SOURCE (object);
106	VikTmsMapSourcePrivate *priv = VIK_TMS_MAP_SOURCE_PRIVATE (self);
107
108	switch (property_id)
109	{
110	case PROP_HOSTNAME:
111	g_free (priv->hostname);
112	priv->hostname = g_value_dup_string (value);
113	break;
114
115	case PROP_URL:
116	g_free (priv->url);
117	priv->url = g_value_dup_string (value);
118	break;
119
120	case PROP_REFERER:
121	g_free (priv->options.referer);
122	priv->options.referer = g_value_dup_string (value);
123	break;
124
125	case PROP_FOLLOW_LOCATION:
126	priv->options.follow_location = g_value_get_long (value);
127	break;
128
129	case PROP_CHECK_FILE_SERVER_TIME:
130	priv->options.check_file_server_time = g_value_get_boolean (value);
131	break;
132
133	default:
134	/* We don't have any other property... */
135	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
136	break;
137	}
138	}
139
140	static void
141	vik_tms_map_source_get_property (GObject *object,
142	guint property_id,
143	GValue *value,
144	GParamSpec *pspec)
145	{
146	VikTmsMapSource *self = VIK_TMS_MAP_SOURCE (object);
147	VikTmsMapSourcePrivate *priv = VIK_TMS_MAP_SOURCE_PRIVATE (self);
148
149	switch (property_id)
150	{
151	case PROP_HOSTNAME:
152	g_value_set_string (value, priv->hostname);
153	break;
154
155	case PROP_URL:
156	g_value_set_string (value, priv->url);
157	break;
158
159	case PROP_REFERER:
160	g_value_set_string (value, priv->options.referer);
161	break;
162
163	case PROP_FOLLOW_LOCATION:
164	g_value_set_long (value, priv->options.follow_location);
165	break;
166
167	case PROP_CHECK_FILE_SERVER_TIME:
168	g_value_set_boolean (value, priv->options.check_file_server_time);
169	break;
170
171	default:
172	/* We don't have any other property... */
173	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
174	break;
175	}
176	}
177
178	static void
179	vik_tms_map_source_class_init (VikTmsMapSourceClass *klass)
180	{
181	GObjectClass* object_class = G_OBJECT_CLASS (klass);
182	VikMapSourceClass* granparent_class = VIK_MAP_SOURCE_CLASS (klass);
183	VikMapSourceDefaultClass* parent_class = VIK_MAP_SOURCE_DEFAULT_CLASS (klass);
184	GParamSpec *pspec = NULL;
185
186	object_class->set_property = vik_tms_map_source_set_property;
187	object_class->get_property = vik_tms_map_source_get_property;
188
189	/* Overiding methods */
190	granparent_class->coord_to_mapcoord = _coord_to_mapcoord;
191	granparent_class->mapcoord_to_center_coord = _mapcoord_to_center_coord;
192	granparent_class->supports_download_only_new = _supports_download_only_new;
193
194	parent_class->get_uri = _get_uri;
195	parent_class->get_hostname = _get_hostname;
196	parent_class->get_download_options = _get_download_options;
197
198	pspec = g_param_spec_string ("hostname",
199	"Hostname",
200	"The hostname of the map server",
201	"<no-set>" /* default value */,
202	G_PARAM_CONSTRUCT_ONLY \| G_PARAM_READWRITE);
203	g_object_class_install_property (object_class, PROP_HOSTNAME, pspec);
204
205	pspec = g_param_spec_string ("url",
206	"URL",
207	"The template of the tiles' URL",
208	"<no-set>" /* default value */,
209	G_PARAM_CONSTRUCT_ONLY \| G_PARAM_READWRITE);
210	g_object_class_install_property (object_class, PROP_URL, pspec);
211
212	pspec = g_param_spec_string ("referer",
213	"Referer",
214	"The REFERER string to use in HTTP request",
215	NULL /* default value */,
216	G_PARAM_CONSTRUCT_ONLY \| G_PARAM_READWRITE);
217	g_object_class_install_property (object_class, PROP_REFERER, pspec);
218
219	pspec = g_param_spec_long ("follow-location",
220	"Follow location",
221	"Specifies the number of retries to follow a redirect while downloading a page",
222	0 /* minimum value */,
223	G_MAXLONG /* maximum value */,
224	0 /* default value */,
225	G_PARAM_CONSTRUCT_ONLY \| G_PARAM_READWRITE);
226	g_object_class_install_property (object_class, PROP_FOLLOW_LOCATION, pspec);
227
228	pspec = g_param_spec_boolean ("check-file-server-time",
229	"Check file server time",
230	"Age of current cache before redownloading tile",
231	FALSE /* default value */,
232	G_PARAM_CONSTRUCT_ONLY \| G_PARAM_READWRITE);
233	g_object_class_install_property (object_class, PROP_CHECK_FILE_SERVER_TIME, pspec);
234
235	g_type_class_add_private (klass, sizeof (VikTmsMapSourcePrivate));
236
237	object_class->finalize = vik_tms_map_source_finalize;
238	}
239
240	/* 1 << (x) is like a 2*(x) /
241	#define GZ(x) ((1<<(x)))
242
243	static const gdouble scale_mpps[] = { GZ(0), GZ(1), GZ(2), GZ(3), GZ(4), GZ(5), GZ(6), GZ(7), GZ(8), GZ(9),
244	GZ(10), GZ(11), GZ(12), GZ(13), GZ(14), GZ(15), GZ(16), GZ(17) };
245
246	static const gint num_scales = (sizeof(scale_mpps) / sizeof(scale_mpps[0]));
247
248	static const gdouble scale_neg_mpps[] = { 1.0/GZ(0), 1.0/GZ(1), 1.0/GZ(2), 1.0/GZ(3) };
249	static const gint num_scales_neg = (sizeof(scale_neg_mpps) / sizeof(scale_neg_mpps[0]));
250
251	#define ERROR_MARGIN 0.01
252	static gint tms_zoom ( gdouble mpp ) {
253	gint i;
254	for ( i = 0; i < num_scales; i++ ) {
255	if ( ABS(scale_mpps[i] - mpp) < ERROR_MARGIN ) {
256	return i;
257	}
258	}
259	for ( i = 0; i < num_scales_neg; i++ ) {
260	if ( ABS(scale_neg_mpps[i] - mpp) < 0.000001 ) {
261	return -i;
262	}
263	}
264
265	return 255;
266	}
267
268	gboolean
269	_supports_download_only_new (VikMapSource *self)
270	{
271	g_return_val_if_fail (VIK_IS_TMS_MAP_SOURCE(self), FALSE);
272
273	VikTmsMapSourcePrivate *priv = VIK_TMS_MAP_SOURCE_PRIVATE(self);
274
275	return priv->options.check_file_server_time;
276	}
277
278	static gboolean
279	_coord_to_mapcoord ( VikMapSource self, const VikCoord src, gdouble xzoom, gdouble yzoom, MapCoord *dest )
280	{
281	g_assert ( src->mode == VIK_COORD_LATLON );
282
283	if ( xzoom != yzoom )
284	return FALSE;
285
286	dest->scale = tms_zoom ( xzoom );
287	if ( dest->scale == 255 )
288	return FALSE;
289
290	/* Note : GZ(17) / xzoom / 2 = number of tile on Y axis */
291	g_debug("%s: xzoom=%f yzoom=%f -> %f", __FUNCTION__,
292	xzoom, yzoom, GZ(17) / xzoom / 2);
293	dest->x = floor((src->east_west + 180) / 180 * GZ(17) / xzoom / 2);
294	/* We should restore logic of viking:
295	* tile index on Y axis follow a screen logic (top -> down)
296	*/
297	dest->y = floor((180 - (src->north_south + 90)) / 180 * GZ(17) / xzoom / 2);
298	dest->z = 0;
299	g_debug("%s: %f,%f -> %d,%d", __FUNCTION__,
300	src->east_west, src->north_south, dest->x, dest->y);
301	return TRUE;
302	}
303
304	static void
305	_mapcoord_to_center_coord ( VikMapSource self, MapCoord src, VikCoord *dest )
306	{
307	gdouble socalled_mpp;
308	if (src->scale >= 0)
309	socalled_mpp = GZ(src->scale);
310	else
311	socalled_mpp = 1.0/GZ(-src->scale);
312	dest->mode = VIK_COORD_LATLON;
313	dest->east_west = (src->x+0.5) * 180 / GZ(17) * socalled_mpp * 2 - 180;
314	/* We should restore logic of viking:
315	* tile index on Y axis follow a screen logic (top -> down)
316	*/
317	dest->north_south = -((src->y+0.5) * 180 / GZ(17) * socalled_mpp * 2 - 90);
318	g_debug("%s: %d,%d -> %f,%f", __FUNCTION__,
319	src->x, src->y, dest->east_west, dest->north_south);
320	}
321
322	static gchar *
323	_get_uri( VikMapSourceDefault self, MapCoord src )
324	{
325	g_return_val_if_fail (VIK_IS_TMS_MAP_SOURCE(self), NULL);
326
327	VikTmsMapSourcePrivate *priv = VIK_TMS_MAP_SOURCE_PRIVATE(self);
328	gdouble socalled_mpp;
329	if (src->scale >= 0)
330	socalled_mpp = GZ(src->scale);
331	else
332	socalled_mpp = 1.0/GZ(-src->scale);
333	/* We should restore logic of viking:
334	* tile index on Y axis follow a screen logic (top -> down)
335	*/
336
337	/* Note : nb tiles on Y axis */
338	gint nb_tiles = GZ(17 - src->scale - 1);
339
340	gchar *uri = g_strdup_printf (priv->url, 17 - src->scale - 1, src->x, nb_tiles - src->y - 1);
341
342	return uri;
343	}
344
345	static gchar *
346	_get_hostname( VikMapSourceDefault *self )
347	{
348	g_return_val_if_fail (VIK_IS_TMS_MAP_SOURCE(self), NULL);
349
350	VikTmsMapSourcePrivate *priv = VIK_TMS_MAP_SOURCE_PRIVATE(self);
351	return g_strdup( priv->hostname );
352	}
353
354	static DownloadMapOptions *
355	_get_download_options( VikMapSourceDefault *self )
356	{
357	g_return_val_if_fail (VIK_IS_TMS_MAP_SOURCE(self), NULL);
358
359	VikTmsMapSourcePrivate *priv = VIK_TMS_MAP_SOURCE_PRIVATE(self);
360	return &(priv->options);
361	}
362
363	VikTmsMapSource *
364	vik_tms_map_source_new_with_id (guint8 id, const gchar label, const gchar hostname, const gchar *url)
365	{
366	return g_object_new(VIK_TYPE_TMS_MAP_SOURCE,
367	"id", id, "label", label, "hostname", hostname, "url", url, NULL);
368	}