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50a14534 EB |
1 | /* |
2 | * viking -- GPS Data and Topo Analyzer, Explorer, and Manager | |
3 | * | |
4 | * Copyright (C) 2005, Evan Battaglia <viking@greentorch.org> | |
5 | * | |
6 | * Some formulas or perhaps even code derived from GPSDrive | |
7 | * GPSDrive Copyright (C) 2001-2004 Fritz Ganter <ganter@ganter.at> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | * | |
23 | */ | |
24 | ||
25 | #include <gtk/gtk.h> | |
26 | #include <math.h> | |
27 | #include "globals.h" | |
28 | #include "coords.h" | |
29 | #include "vikcoord.h" | |
30 | #include "mapcoord.h" | |
85611cd9 | 31 | #include "download.h" |
cdcaf41c | 32 | #include "vikmapslayer.h" |
50a14534 | 33 | |
cdcaf41c QT |
34 | #include "expedia.h" |
35 | ||
96bcc8cb QT |
36 | static gboolean expedia_coord_to_mapcoord ( const VikCoord *src, gdouble xzoom, gdouble yzoom, MapCoord *dest ); |
37 | static void expedia_mapcoord_to_center_coord ( MapCoord *src, VikCoord *dest ); | |
38 | static int expedia_download ( MapCoord *src, const gchar *dest_fn ); | |
39 | ||
a3188993 | 40 | static DownloadOptions expedia_options = { 0, NULL }; |
80214df2 | 41 | |
cdcaf41c QT |
42 | void expedia_init() { |
43 | VikMapsLayer_MapType map_type = { 5, 0, 0, VIK_VIEWPORT_DRAWMODE_EXPEDIA, expedia_coord_to_mapcoord, expedia_mapcoord_to_center_coord, expedia_download }; | |
44 | maps_layer_register_type("Expedia Street Maps", 5, &map_type); | |
45 | } | |
50a14534 EB |
46 | |
47 | #define EXPEDIA_SITE "expedia.com" | |
48 | #define MPP_MARGIN_OF_ERROR 0.01 | |
49 | #define DEGREES_TO_RADS 0.0174532925 | |
50 | #define HEIGHT_OF_LAT_DEGREE (111318.84502/ALTI_TO_MPP) | |
51 | #define HEIGHT_OF_LAT_MINUTE (1855.3140837/ALTI_TO_MPP) | |
52 | #define WIDTH_BUFFER 0 | |
53 | #define HEIGHT_BUFFER 25 | |
54 | #define REAL_WIDTH_BUFFER 1 | |
55 | #define REAL_HEIGHT_BUFFER 26 | |
56 | ||
57 | /* first buffer is to cut off the expedia/microsoft logo. Annoying little buggers ;) */ | |
58 | /* second is to allow for a 1-pixel overlap on each side. this is a good thing (tm) */ | |
59 | ||
60 | static const guint expedia_altis[] = { 1, 2, 4, 8, 16, 32, 64, 128, 256, 512 }; | |
61 | /* square this number to find out how many per square degree. */ | |
62 | static const gdouble expedia_altis_degree_freq[] = { 120, 60, 30, 15, 8, 4, 2, 1, 1, 1 }; | |
63 | static const guint expedia_altis_count = sizeof(expedia_altis) / sizeof(expedia_altis[0]); | |
64 | ||
65 | gdouble expedia_altis_freq ( gint alti ) | |
66 | { | |
67 | static gint i; | |
68 | for ( i = 0; i < expedia_altis_count; i++ ) | |
69 | if ( expedia_altis[i] == alti ) | |
70 | return expedia_altis_degree_freq [ i ]; | |
71 | ||
72 | g_error ( "Invalid expedia altitude" ); | |
73 | return 0; | |
74 | } | |
75 | ||
76 | /* returns -1 if none of the above. */ | |
77 | gint expedia_zoom_to_alti ( gdouble zoom ) | |
78 | { | |
79 | guint i; | |
80 | for ( i = 0; i < expedia_altis_count; i++ ) | |
81 | if ( fabs(expedia_altis[i] - zoom) / zoom < MPP_MARGIN_OF_ERROR ) | |
82 | return expedia_altis[i]; | |
83 | return -1; | |
84 | } | |
85 | ||
86 | /* | |
87 | gint expedia_pseudo_zone ( gint alti, gint x, gint y ) | |
88 | { | |
89 | return (int) (x/expedia_altis_freq(alti)*180) + (int) (y/expedia_altis_freq(alti)*90); | |
90 | } | |
91 | */ | |
92 | ||
93 | void expedia_snip ( const gchar *file ) | |
94 | { | |
95 | /* Load the pixbuf */ | |
96 | GError *gx = NULL; | |
97 | GdkPixbuf *old, *cropped; | |
98 | gint width, height; | |
99 | ||
100 | old = gdk_pixbuf_new_from_file ( file, &gx ); | |
101 | if (gx) | |
102 | { | |
103 | g_warning ( "Couldn't open EXPEDIA image file (right after successful download! Please report and delete image file!): %s", gx->message ); | |
104 | g_error_free ( gx ); | |
105 | return; | |
106 | } | |
107 | ||
108 | width = gdk_pixbuf_get_width ( old ); | |
109 | height = gdk_pixbuf_get_height ( old ); | |
110 | ||
111 | cropped = gdk_pixbuf_new_subpixbuf ( old, WIDTH_BUFFER, HEIGHT_BUFFER, | |
112 | width - 2*WIDTH_BUFFER, height - 2*HEIGHT_BUFFER ); | |
113 | ||
3adc68b0 | 114 | gdk_pixbuf_save ( cropped, file, "png", &gx, NULL ); |
50a14534 EB |
115 | if ( gx ) { |
116 | g_warning ( "Couldn't save EXPEDIA image file (right after successful download! Please report and delete image file!): %s", gx->message ); | |
117 | g_error_free ( gx ); | |
118 | } | |
119 | ||
120 | g_object_unref ( cropped ); | |
121 | g_object_unref ( old ); | |
122 | } | |
123 | ||
124 | /* if degree_freeq = 60 -> nearest minute (in middle) */ | |
125 | /* everything starts at -90,-180 -> 0,0. then increments by (1/degree_freq) */ | |
96bcc8cb | 126 | static gboolean expedia_coord_to_mapcoord ( const VikCoord *src, gdouble xzoom, gdouble yzoom, MapCoord *dest ) |
50a14534 EB |
127 | { |
128 | gint alti; | |
129 | ||
130 | g_assert ( src->mode == VIK_COORD_LATLON ); | |
131 | ||
132 | if ( xzoom != yzoom ) | |
133 | return FALSE; | |
134 | ||
135 | alti = expedia_zoom_to_alti ( xzoom ); | |
136 | if ( alti != -1 ) | |
137 | { | |
138 | dest->scale = alti; | |
139 | dest->x = (int) (((src->east_west+180) * expedia_altis_freq(alti))+0.5); | |
140 | dest->y = (int) (((src->north_south+90) * expedia_altis_freq(alti))+0.5); | |
141 | /* + 0.5 to round off and not floor */ | |
142 | ||
143 | /* just to space out tiles on the filesystem */ | |
144 | dest->z = 0; | |
145 | return TRUE; | |
146 | } | |
147 | return FALSE; | |
148 | } | |
149 | ||
150 | void expedia_xy_to_latlon_middle ( gint alti, gint x, gint y, struct LatLon *ll ) | |
151 | { | |
152 | ll->lon = (((gdouble)x) / expedia_altis_freq(alti)) - 180; | |
153 | ll->lat = (((gdouble)y) / expedia_altis_freq(alti)) - 90; | |
154 | } | |
155 | ||
96bcc8cb | 156 | static void expedia_mapcoord_to_center_coord ( MapCoord *src, VikCoord *dest ) |
50a14534 EB |
157 | { |
158 | dest->mode = VIK_COORD_LATLON; | |
159 | dest->east_west = (((gdouble)src->x) / expedia_altis_freq(src->scale)) - 180; | |
160 | dest->north_south = (((gdouble)src->y) / expedia_altis_freq(src->scale)) - 90; | |
161 | } | |
162 | ||
96bcc8cb | 163 | static int expedia_download ( MapCoord *src, const gchar *dest_fn ) |
50a14534 EB |
164 | { |
165 | gint height, width; | |
166 | struct LatLon ll; | |
167 | gchar *uri; | |
96bcc8cb | 168 | int res = -1; |
50a14534 EB |
169 | |
170 | expedia_xy_to_latlon_middle ( src->scale, src->x, src->y, &ll ); | |
171 | ||
172 | height = HEIGHT_OF_LAT_DEGREE / expedia_altis_freq(src->scale) / (src->scale); | |
173 | width = height * cos ( ll.lat * DEGREES_TO_RADS ); | |
174 | ||
175 | height += 2*REAL_HEIGHT_BUFFER; | |
176 | width += 2*REAL_WIDTH_BUFFER; | |
177 | ||
178 | uri = g_strdup_printf ( "/pub/agent.dll?qscr=mrdt&ID=3XNsF.&CenP=%lf,%lf&Lang=%s&Alti=%d&Size=%d,%d&Offs=0.000000,0.000000&BCheck&tpid=1", | |
179 | ll.lat, ll.lon, (ll.lon > -30) ? "EUR0809" : "USA0409", src->scale, width, height ); | |
180 | ||
80214df2 | 181 | if ((res = a_http_download_get_url ( "expedia.com", uri, dest_fn, &expedia_options )) == 0) /* All OK */ |
96bcc8cb QT |
182 | expedia_snip ( dest_fn ); |
183 | return(res); | |
50a14534 EB |
184 | } |
185 | ||
186 |