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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" | |
8eb12ac6 | 28 | #include "vikslippymapsource.h" |
e3a90009 GB |
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 | ||
8eb12ac6 GB |
34 | static gchar *_get_uri( VikSlippyMapSource *self, MapCoord *src ); |
35 | static gchar *_get_hostname( VikSlippyMapSource *self ); | |
36 | static DownloadOptions *_get_download_options( VikSlippyMapSource *self ); | |
e3a90009 | 37 | |
8eb12ac6 GB |
38 | /* FIXME Huge gruik */ |
39 | static DownloadOptions slippy_options = { NULL, 0, a_check_map_file }; | |
40 | ||
41 | typedef struct _VikSlippyMapSourcePrivate VikSlippyMapSourcePrivate; | |
42 | struct _VikSlippyMapSourcePrivate | |
43 | { | |
44 | gchar *hostname; | |
45 | gchar *url; | |
46 | }; | |
47 | ||
48 | #define VIK_SLIPPY_MAP_SOURCE_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), VIK_TYPE_SLIPPY_MAP_SOURCE, VikSlippyMapSourcePrivate)) | |
49 | ||
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50 | /* properties */ |
51 | enum | |
52 | { | |
53 | PROP_0, | |
54 | ||
55 | PROP_HOSTNAME, | |
56 | PROP_URL, | |
57 | }; | |
58 | ||
8eb12ac6 | 59 | G_DEFINE_TYPE_EXTENDED (VikSlippyMapSource, vik_slippy_map_source, VIK_TYPE_MAP_SOURCE_DEFAULT, (GTypeFlags)0,); |
e3a90009 GB |
60 | |
61 | static void | |
3a84e537 | 62 | vik_slippy_map_source_init (VikSlippyMapSource *self) |
e3a90009 | 63 | { |
8eb12ac6 | 64 | /* initialize the object here */ |
31f3c5e7 GB |
65 | g_object_set (G_OBJECT (self), |
66 | "tilesize-x", 256, | |
67 | "tilesize-y", 256, | |
68 | "drawmode", VIK_VIEWPORT_DRAWMODE_MERCATOR, | |
69 | NULL); | |
e3a90009 GB |
70 | } |
71 | ||
72 | static void | |
8eb12ac6 | 73 | vik_slippy_map_source_finalize (GObject *object) |
e3a90009 GB |
74 | { |
75 | /* TODO: Add deinitalization code here */ | |
76 | ||
8eb12ac6 | 77 | G_OBJECT_CLASS (vik_slippy_map_source_parent_class)->finalize (object); |
e3a90009 GB |
78 | } |
79 | ||
4e53f3dc GB |
80 | static void |
81 | vik_slippy_map_source_set_property (GObject *object, | |
82 | guint property_id, | |
83 | const GValue *value, | |
84 | GParamSpec *pspec) | |
85 | { | |
86 | VikSlippyMapSource *self = VIK_SLIPPY_MAP_SOURCE (object); | |
87 | VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE (self); | |
88 | ||
89 | switch (property_id) | |
90 | { | |
91 | case PROP_HOSTNAME: | |
92 | g_free (priv->hostname); | |
93 | priv->hostname = g_value_dup_string (value); | |
94 | break; | |
95 | ||
96 | case PROP_URL: | |
97 | g_free (priv->url); | |
98 | priv->url = g_value_dup_string (value); | |
99 | break; | |
100 | ||
101 | default: | |
102 | /* We don't have any other property... */ | |
103 | G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); | |
104 | break; | |
105 | } | |
106 | } | |
107 | ||
108 | static void | |
109 | vik_slippy_map_source_get_property (GObject *object, | |
110 | guint property_id, | |
111 | GValue *value, | |
112 | GParamSpec *pspec) | |
113 | { | |
114 | VikSlippyMapSource *self = VIK_SLIPPY_MAP_SOURCE (object); | |
115 | VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE (self); | |
116 | ||
117 | switch (property_id) | |
118 | { | |
119 | case PROP_HOSTNAME: | |
120 | g_value_set_string (value, priv->hostname); | |
121 | break; | |
122 | ||
123 | case PROP_URL: | |
124 | g_value_set_string (value, priv->url); | |
125 | break; | |
126 | ||
127 | default: | |
128 | /* We don't have any other property... */ | |
129 | G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); | |
130 | break; | |
131 | } | |
132 | } | |
133 | ||
e3a90009 | 134 | static void |
8eb12ac6 | 135 | vik_slippy_map_source_class_init (VikSlippyMapSourceClass *klass) |
e3a90009 GB |
136 | { |
137 | GObjectClass* object_class = G_OBJECT_CLASS (klass); | |
138 | VikMapSourceClass* parent_class = VIK_MAP_SOURCE_CLASS (klass); | |
4e53f3dc GB |
139 | GParamSpec *pspec = NULL; |
140 | ||
141 | object_class->set_property = vik_slippy_map_source_set_property; | |
142 | object_class->get_property = vik_slippy_map_source_get_property; | |
e3a90009 GB |
143 | |
144 | /* Overiding methods */ | |
145 | parent_class->coord_to_mapcoord = _coord_to_mapcoord; | |
146 | parent_class->mapcoord_to_center_coord = _mapcoord_to_center_coord; | |
147 | parent_class->download = _download; | |
8eb12ac6 GB |
148 | |
149 | /* Default implementation of methods */ | |
150 | klass->get_uri = _get_uri; | |
151 | klass->get_hostname = _get_hostname; | |
152 | klass->get_download_options = _get_download_options; | |
4e53f3dc GB |
153 | |
154 | pspec = g_param_spec_string ("hostname", | |
155 | "Hostname", | |
156 | "The hostname of the map server", | |
157 | "<no-set>" /* default value */, | |
158 | G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE); | |
159 | g_object_class_install_property (object_class, PROP_HOSTNAME, pspec); | |
160 | ||
161 | pspec = g_param_spec_string ("url", | |
162 | "URL", | |
163 | "The template of the tiles' URL", | |
164 | "<no-set>" /* default value */, | |
165 | G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE); | |
166 | g_object_class_install_property (object_class, PROP_URL, pspec); | |
8eb12ac6 GB |
167 | |
168 | g_type_class_add_private (klass, sizeof (VikSlippyMapSourcePrivate)); | |
169 | ||
170 | object_class->finalize = vik_slippy_map_source_finalize; | |
e3a90009 GB |
171 | } |
172 | ||
173 | /* 1 << (x) is like a 2**(x) */ | |
174 | #define GZ(x) ((1<<x)) | |
175 | ||
176 | 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), | |
177 | GZ(10), GZ(11), GZ(12), GZ(13), GZ(14), GZ(15), GZ(16), GZ(17) }; | |
178 | ||
179 | static const gint num_scales = (sizeof(scale_mpps) / sizeof(scale_mpps[0])); | |
180 | ||
181 | #define ERROR_MARGIN 0.01 | |
182 | static guint8 slippy_zoom ( gdouble mpp ) { | |
183 | gint i; | |
184 | for ( i = 0; i < num_scales; i++ ) { | |
185 | if ( ABS(scale_mpps[i] - mpp) < ERROR_MARGIN ) | |
186 | return i; | |
187 | } | |
188 | return 255; | |
189 | } | |
190 | ||
191 | gchar * | |
8eb12ac6 | 192 | vik_slippy_map_source_get_uri( VikSlippyMapSource *self, MapCoord *src ) |
e3a90009 | 193 | { |
8eb12ac6 | 194 | VikSlippyMapSourceClass *klass; |
e3a90009 | 195 | g_return_val_if_fail (self != NULL, 0); |
8eb12ac6 GB |
196 | g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE (self), 0); |
197 | klass = VIK_SLIPPY_MAP_SOURCE_GET_CLASS(self); | |
e3a90009 GB |
198 | |
199 | g_return_val_if_fail (klass->get_uri != NULL, 0); | |
200 | ||
201 | return (*klass->get_uri)(self, src); | |
202 | } | |
203 | ||
204 | gchar * | |
8eb12ac6 | 205 | vik_slippy_map_source_get_hostname( VikSlippyMapSource *self ) |
e3a90009 | 206 | { |
8eb12ac6 | 207 | VikSlippyMapSourceClass *klass; |
e3a90009 | 208 | g_return_val_if_fail (self != NULL, 0); |
8eb12ac6 GB |
209 | g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE (self), 0); |
210 | klass = VIK_SLIPPY_MAP_SOURCE_GET_CLASS(self); | |
e3a90009 GB |
211 | |
212 | g_return_val_if_fail (klass->get_hostname != NULL, 0); | |
213 | ||
214 | return (*klass->get_hostname)(self); | |
215 | } | |
216 | ||
217 | DownloadOptions * | |
8eb12ac6 | 218 | vik_slippy_map_source_get_download_options( VikSlippyMapSource *self ) |
e3a90009 | 219 | { |
8eb12ac6 | 220 | VikSlippyMapSourceClass *klass; |
e3a90009 | 221 | g_return_val_if_fail (self != NULL, 0); |
8eb12ac6 GB |
222 | g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE (self), 0); |
223 | klass = VIK_SLIPPY_MAP_SOURCE_GET_CLASS(self); | |
e3a90009 GB |
224 | |
225 | g_return_val_if_fail (klass->get_download_options != NULL, 0); | |
226 | ||
227 | return (*klass->get_download_options)(self); | |
228 | } | |
229 | ||
230 | static gboolean | |
231 | _coord_to_mapcoord ( VikMapSource *self, const VikCoord *src, gdouble xzoom, gdouble yzoom, MapCoord *dest ) | |
232 | { | |
233 | g_assert ( src->mode == VIK_COORD_LATLON ); | |
234 | ||
235 | if ( xzoom != yzoom ) | |
236 | return FALSE; | |
237 | ||
238 | dest->scale = slippy_zoom ( xzoom ); | |
239 | if ( dest->scale == 255 ) | |
240 | return FALSE; | |
241 | ||
242 | dest->x = (src->east_west + 180) / 360 * GZ(17) / xzoom; | |
243 | dest->y = (180 - MERCLAT(src->north_south)) / 360 * GZ(17) / xzoom; | |
244 | dest->z = 0; | |
245 | ||
246 | return TRUE; | |
247 | } | |
248 | ||
249 | static void | |
250 | _mapcoord_to_center_coord ( VikMapSource *self, MapCoord *src, VikCoord *dest ) | |
251 | { | |
252 | gdouble socalled_mpp = GZ(src->scale); | |
253 | dest->mode = VIK_COORD_LATLON; | |
254 | dest->east_west = ((src->x+0.5) / GZ(17) * socalled_mpp * 360) - 180; | |
255 | dest->north_south = DEMERCLAT(180 - ((src->y+0.5) / GZ(17) * socalled_mpp * 360)); | |
256 | } | |
257 | ||
258 | static int | |
259 | _download ( VikMapSource *self, MapCoord *src, const gchar *dest_fn ) | |
260 | { | |
261 | int res; | |
8eb12ac6 GB |
262 | gchar *uri = vik_slippy_map_source_get_uri(VIK_SLIPPY_MAP_SOURCE(self), src); |
263 | gchar *host = vik_slippy_map_source_get_hostname(VIK_SLIPPY_MAP_SOURCE(self)); | |
264 | DownloadOptions *options = vik_slippy_map_source_get_download_options(VIK_SLIPPY_MAP_SOURCE(self)); | |
e3a90009 GB |
265 | res = a_http_download_get_url ( host, uri, dest_fn, options ); |
266 | g_free ( uri ); | |
267 | g_free ( host ); | |
268 | return res; | |
269 | } | |
8eb12ac6 GB |
270 | |
271 | static gchar * | |
272 | _get_uri( VikSlippyMapSource *self, MapCoord *src ) | |
273 | { | |
274 | g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE(self), NULL); | |
275 | ||
276 | VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE(self); | |
277 | gchar *uri = g_strdup_printf (priv->url, 17 - src->scale, src->x, src->y); | |
278 | return uri; | |
279 | } | |
280 | ||
281 | static gchar * | |
282 | _get_hostname( VikSlippyMapSource *self ) | |
283 | { | |
284 | g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE(self), NULL); | |
285 | ||
286 | VikSlippyMapSourcePrivate *priv = VIK_SLIPPY_MAP_SOURCE_PRIVATE(self); | |
287 | return g_strdup( priv->hostname ); | |
288 | } | |
289 | ||
290 | static DownloadOptions * | |
291 | _get_download_options( VikSlippyMapSource *self ) | |
292 | { | |
293 | g_return_val_if_fail (VIK_IS_SLIPPY_MAP_SOURCE(self), NULL); | |
294 | ||
295 | return &slippy_options; | |
296 | } | |
297 | ||
298 | VikSlippyMapSource * | |
299 | vik_slippy_map_source_new_with_id (guint8 id, const gchar *hostname, const gchar *url) | |
300 | { | |
4e53f3dc GB |
301 | return g_object_new(VIK_TYPE_SLIPPY_MAP_SOURCE, |
302 | "id", id, "hostname", hostname, "url", url, NULL); | |
8eb12ac6 | 303 | } |