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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" | |
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 | { | |
40 | int type; | |
41 | }; | |
42 | ||
43 | #define TERRASERVER_MAP_SOURCE_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), TERRASERVER_TYPE_MAP_SOURCE, TerraserverMapSourcePrivate)) | |
44 | ||
45 | G_DEFINE_TYPE_EXTENDED (TerraserverMapSource, terraserver_map_source, VIK_TYPE_MAP_SOURCE_DEFAULT, (GTypeFlags)0,); | |
46 | ||
47 | static void | |
3a84e537 | 48 | terraserver_map_source_init (TerraserverMapSource *self) |
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49 | { |
50 | /* initialize the object here */ | |
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51 | vik_map_source_default_set_tilesize_x (VIK_MAP_SOURCE_DEFAULT (self), 200); |
52 | vik_map_source_default_set_tilesize_y (VIK_MAP_SOURCE_DEFAULT (self), 200); | |
53 | vik_map_source_default_set_drawmode (VIK_MAP_SOURCE_DEFAULT (self), VIK_VIEWPORT_DRAWMODE_UTM); | |
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54 | } |
55 | ||
56 | static void | |
57 | terraserver_map_source_finalize (GObject *object) | |
58 | { | |
59 | /* TODO: Add deinitalization code here */ | |
60 | ||
61 | G_OBJECT_CLASS (terraserver_map_source_parent_class)->finalize (object); | |
62 | } | |
63 | ||
64 | static void | |
65 | terraserver_map_source_class_init (TerraserverMapSourceClass *klass) | |
66 | { | |
67 | GObjectClass* object_class = G_OBJECT_CLASS (klass); | |
68 | VikMapSourceClass* parent_class = VIK_MAP_SOURCE_CLASS (klass); | |
69 | ||
70 | /* Overiding methods */ | |
71 | parent_class->coord_to_mapcoord = _coord_to_mapcoord; | |
72 | parent_class->mapcoord_to_center_coord = _mapcoord_to_center_coord; | |
73 | parent_class->download = _download; | |
74 | ||
75 | g_type_class_add_private (klass, sizeof (TerraserverMapSourcePrivate)); | |
76 | ||
77 | object_class->finalize = terraserver_map_source_finalize; | |
78 | } | |
79 | ||
80 | #define TERRASERVER_SITE "terraserver-usa.com" | |
81 | #define MARGIN_OF_ERROR 0.001 | |
82 | ||
83 | static int mpp_to_scale ( gdouble mpp, guint8 type ) | |
84 | { | |
85 | mpp *= 4; | |
86 | gint t = (gint) mpp; | |
87 | if ( ABS(mpp - t) > MARGIN_OF_ERROR ) | |
88 | return FALSE; | |
89 | ||
90 | switch ( t ) { | |
91 | case 1: return (type == 4) ? 8 : 0; | |
92 | case 2: return (type == 4) ? 9 : 0; | |
93 | case 4: return (type != 2) ? 10 : 0; | |
94 | case 8: return 11; | |
95 | case 16: return 12; | |
96 | case 32: return 13; | |
97 | case 64: return 14; | |
98 | case 128: return 15; | |
99 | case 256: return 16; | |
100 | case 512: return 17; | |
101 | case 1024: return 18; | |
102 | case 2048: return 19; | |
103 | default: return 0; | |
104 | } | |
105 | } | |
106 | ||
107 | static gdouble scale_to_mpp ( gint scale ) | |
108 | { | |
109 | return pow(2,scale - 10); | |
110 | } | |
111 | ||
112 | static gboolean | |
113 | _coord_to_mapcoord ( VikMapSource *self, const VikCoord *src, gdouble xmpp, gdouble ympp, MapCoord *dest ) | |
114 | { | |
115 | g_return_val_if_fail(TERRASERVER_IS_MAP_SOURCE(self), FALSE); | |
116 | ||
117 | TerraserverMapSourcePrivate *priv = TERRASERVER_MAP_SOURCE_PRIVATE(self); | |
118 | int type = priv->type; | |
119 | g_assert ( src->mode == VIK_COORD_UTM ); | |
120 | ||
121 | if ( xmpp != ympp ) | |
122 | return FALSE; | |
123 | ||
124 | dest->scale = mpp_to_scale ( xmpp, type ); | |
125 | if ( ! dest->scale ) | |
126 | return FALSE; | |
127 | ||
128 | dest->x = (gint)(((gint)(src->east_west))/(200*xmpp)); | |
129 | dest->y = (gint)(((gint)(src->north_south))/(200*xmpp)); | |
130 | dest->z = src->utm_zone; | |
131 | return TRUE; | |
132 | } | |
133 | ||
134 | static void | |
135 | _mapcoord_to_center_coord ( VikMapSource *self, MapCoord *src, VikCoord *dest ) | |
136 | { | |
137 | // FIXME: slowdown here! | |
138 | gdouble mpp = scale_to_mpp ( src->scale ); | |
139 | dest->mode = VIK_COORD_UTM; | |
140 | dest->utm_zone = src->z; | |
141 | dest->east_west = ((src->x * 200) + 100) * mpp; | |
142 | dest->north_south = ((src->y * 200) + 100) * mpp; | |
143 | } | |
144 | ||
145 | static int | |
146 | _download ( VikMapSource *self, MapCoord *src, const gchar *dest_fn ) | |
147 | { | |
148 | g_return_val_if_fail(TERRASERVER_IS_MAP_SOURCE(self), FALSE); | |
149 | ||
150 | TerraserverMapSourcePrivate *priv = TERRASERVER_MAP_SOURCE_PRIVATE(self); int res = -1; | |
151 | int type = priv->type; | |
152 | gchar *uri = g_strdup_printf ( "/tile.ashx?T=%d&S=%d&X=%d&Y=%d&Z=%d", type, | |
153 | src->scale, src->x, src->y, src->z ); | |
154 | res = a_http_download_get_url ( TERRASERVER_SITE, uri, dest_fn, &terraserver_options ); | |
155 | g_free ( uri ); | |
156 | return res; | |
157 | } | |
158 | ||
159 | TerraserverMapSource * | |
160 | terraserver_map_source_new_with_id (guint8 id, int type) | |
161 | { | |
162 | TerraserverMapSource *ret = g_object_new(TERRASERVER_TYPE_MAP_SOURCE, NULL); | |
163 | ||
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164 | /* TODO use property */ |
165 | vik_map_source_default_set_uniq_id(VIK_MAP_SOURCE_DEFAULT(ret), id); | |
166 | ||
167 | TerraserverMapSourcePrivate *priv = TERRASERVER_MAP_SOURCE_PRIVATE(ret); | |
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168 | priv->type = type; |
169 | return ret; | |
170 | } |