/*
* viking -- GPS Data and Topo Analyzer, Explorer, and Manager
*
* Copyright (C) 2005, Evan Battaglia <viking@greentorch.org>
*
* Some formulas or perhaps even code derived from GPSDrive
* GPSDrive Copyright (C) 2001-2004 Fritz Ganter <ganter@ganter.at>
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <glib/gi18n.h>
#include <gtk/gtk.h>
#ifdef HAVE_MATH_H
#include <math.h>
#endif
#include "globals.h"
#include "coords.h"
#include "vikcoord.h"
#include "mapcoord.h"
#include "download.h"
#include "vikmapslayer.h"
#include "expedia.h"
static gboolean expedia_coord_to_mapcoord ( const VikCoord *src, gdouble xzoom, gdouble yzoom, MapCoord *dest );
static void expedia_mapcoord_to_center_coord ( MapCoord *src, VikCoord *dest );
static int expedia_download ( MapCoord *src, const gchar *dest_fn, void *handle );
static void * expedia_handle_init ( );
static void expedia_handle_cleanup ( void *handle );
static DownloadMapOptions expedia_options = { FALSE, FALSE, NULL, 2, a_check_map_file };
void expedia_init() {
VikMapsLayer_MapType map_type = { 5, 0, 0, VIK_VIEWPORT_DRAWMODE_EXPEDIA, expedia_coord_to_mapcoord, expedia_mapcoord_to_center_coord, expedia_download, expedia_handle_init, expedia_handle_cleanup };
maps_layer_register_type(_("Expedia Street Maps"), 5, &map_type);
}
#define EXPEDIA_SITE "expedia.com"
#define MPP_MARGIN_OF_ERROR 0.01
#define DEGREES_TO_RADS 0.0174532925
#define HEIGHT_OF_LAT_DEGREE (111318.84502/ALTI_TO_MPP)
#define HEIGHT_OF_LAT_MINUTE (1855.3140837/ALTI_TO_MPP)
#define WIDTH_BUFFER 0
#define HEIGHT_BUFFER 25
#define REAL_WIDTH_BUFFER 1
#define REAL_HEIGHT_BUFFER 26
/* first buffer is to cut off the expedia/microsoft logo. Annoying little buggers ;) */
/* second is to allow for a 1-pixel overlap on each side. this is a good thing (tm) */
static const guint expedia_altis[] = { 1, 2, 4, 8, 16, 32, 64, 128, 256, 512 };
/* square this number to find out how many per square degree. */
static const gdouble expedia_altis_degree_freq[] = { 120, 60, 30, 15, 8, 4, 2, 1, 1, 1 };
static const guint expedia_altis_count = sizeof(expedia_altis) / sizeof(expedia_altis[0]);
gdouble expedia_altis_freq ( gint alti )
{
static gint i;
for ( i = 0; i < expedia_altis_count; i++ )
if ( expedia_altis[i] == alti )
return expedia_altis_degree_freq [ i ];
g_error ( _("Invalid expedia altitude") );
return 0;
}
/* returns -1 if none of the above. */
gint expedia_zoom_to_alti ( gdouble zoom )
{
guint i;
for ( i = 0; i < expedia_altis_count; i++ )
if ( fabs(expedia_altis[i] - zoom) / zoom < MPP_MARGIN_OF_ERROR )
return expedia_altis[i];
return -1;
}
/*
gint expedia_pseudo_zone ( gint alti, gint x, gint y )
{
return (int) (x/expedia_altis_freq(alti)*180) + (int) (y/expedia_altis_freq(alti)*90);
}
*/
void expedia_snip ( const gchar *file )
{
/* Load the pixbuf */
GError *gx = NULL;
GdkPixbuf *old, *cropped;
gint width, height;
old = gdk_pixbuf_new_from_file ( file, &gx );
if (gx)
{
g_warning ( _("Couldn't open EXPEDIA image file (right after successful download! Please report and delete image file!): %s"), gx->message );
g_error_free ( gx );
return;
}
width = gdk_pixbuf_get_width ( old );
height = gdk_pixbuf_get_height ( old );
cropped = gdk_pixbuf_new_subpixbuf ( old, WIDTH_BUFFER, HEIGHT_BUFFER,
width - 2*WIDTH_BUFFER, height - 2*HEIGHT_BUFFER );
gdk_pixbuf_save ( cropped, file, "png", &gx, NULL );
if ( gx ) {
g_warning ( _("Couldn't save EXPEDIA image file (right after successful download! Please report and delete image file!): %s"), gx->message );
g_error_free ( gx );
}
g_object_unref ( cropped );
g_object_unref ( old );
}
/* if degree_freeq = 60 -> nearest minute (in middle) */
/* everything starts at -90,-180 -> 0,0. then increments by (1/degree_freq) */
static gboolean expedia_coord_to_mapcoord ( const VikCoord *src, gdouble xzoom, gdouble yzoom, MapCoord *dest )
{
gint alti;
g_assert ( src->mode == VIK_COORD_LATLON );
if ( xzoom != yzoom )
return FALSE;
alti = expedia_zoom_to_alti ( xzoom );
if ( alti != -1 )
{
dest->scale = alti;
dest->x = (int) (((src->east_west+180) * expedia_altis_freq(alti))+0.5);
dest->y = (int) (((src->north_south+90) * expedia_altis_freq(alti))+0.5);
/* + 0.5 to round off and not floor */
/* just to space out tiles on the filesystem */
dest->z = 0;
return TRUE;
}
return FALSE;
}
void expedia_xy_to_latlon_middle ( gint alti, gint x, gint y, struct LatLon *ll )
{
ll->lon = (((gdouble)x) / expedia_altis_freq(alti)) - 180;
ll->lat = (((gdouble)y) / expedia_altis_freq(alti)) - 90;
}
static void expedia_mapcoord_to_center_coord ( MapCoord *src, VikCoord *dest )
{
dest->mode = VIK_COORD_LATLON;
dest->east_west = (((gdouble)src->x) / expedia_altis_freq(src->scale)) - 180;
dest->north_south = (((gdouble)src->y) / expedia_altis_freq(src->scale)) - 90;
}
static int expedia_download ( MapCoord *src, const gchar *dest_fn, void *handle )
{
gint height, width;
struct LatLon ll;
gchar *uri;
int res = -1;
expedia_xy_to_latlon_middle ( src->scale, src->x, src->y, &ll );
height = HEIGHT_OF_LAT_DEGREE / expedia_altis_freq(src->scale) / (src->scale);
width = height * cos ( ll.lat * DEGREES_TO_RADS );
height += 2*REAL_HEIGHT_BUFFER;
width += 2*REAL_WIDTH_BUFFER;
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",
ll.lat, ll.lon, (ll.lon > -30) ? "EUR0809" : "USA0409", src->scale, width, height );
if ((res = a_http_download_get_url ( EXPEDIA_SITE, uri, dest_fn, &expedia_options, NULL )) == 0) /* All OK */
expedia_snip ( dest_fn );
g_free(uri);
return(res);
}
static void * expedia_handle_init ( )
{
// Not much going on here
return 0;
}
static void expedia_handle_cleanup ( void *handle )
{
// Even less here!
}