* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
-#include <gtk/gtk.h>
-#include <math.h>
-#include <string.h>
-#include "coords.h"
-#include "vikcoord.h"
-#include "mapcoord.h"
-#include "download.h"
-#include "globals.h"
-#include "google.h"
-#include "vikmapslayer.h"
+#include <glib/gi18n.h>
-#define GOOGLE_VERSION "w2.46"
-#define GOOGLE_TRANS_VERSION "w2t.47"
-#define GOOGLE_KH_VERSION "17"
+#include "google.h"
-static int google_download ( MapCoord *src, const gchar *dest_fn );
-static int google_trans_download ( MapCoord *src, const gchar *dest_fn );
-static int google_kh_download ( MapCoord *src, const gchar *dest_fn );
-static void google_mapcoord_to_center_coord ( MapCoord *src, VikCoord *dest );
-static gboolean google_coord_to_mapcoord ( const VikCoord *src, gdouble xzoom, gdouble yzoom, MapCoord *dest );
void google_init () {
- VikMapsLayer_MapType google_1 = { 7, 256, 256, VIK_VIEWPORT_DRAWMODE_MERCATOR, google_coord_to_mapcoord, google_mapcoord_to_center_coord, google_download };
- VikMapsLayer_MapType google_2 = { 10, 256, 256, VIK_VIEWPORT_DRAWMODE_MERCATOR, google_coord_to_mapcoord, google_mapcoord_to_center_coord, google_trans_download };
- VikMapsLayer_MapType google_3 = { 11, 256, 256, VIK_VIEWPORT_DRAWMODE_MERCATOR, google_coord_to_mapcoord, google_mapcoord_to_center_coord, google_kh_download };
-
- maps_layer_register_type("Google Maps", 7, &google_1);
- maps_layer_register_type("Transparent Google Maps", 10, &google_2);
- maps_layer_register_type("Google Satellite Images", 11, &google_3);
-}
-
-/* 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]));
-
-#define ERROR_MARGIN 0.01
-guint8 google_zoom ( gdouble mpp ) {
- gint i;
- for ( i = 0; i < num_scales; i++ ) {
- if ( ABS(scale_mpps[i] - mpp) < ERROR_MARGIN )
- return i;
- }
- return 255;
-}
-
-gboolean google_coord_to_mapcoord ( const VikCoord *src, gdouble xzoom, gdouble yzoom, MapCoord *dest )
-{
- g_assert ( src->mode == VIK_COORD_LATLON );
-
- if ( xzoom != yzoom )
- return FALSE;
-
- dest->scale = google_zoom ( xzoom );
- if ( dest->scale == 255 )
- return FALSE;
-
- dest->x = (src->east_west + 180) / 360 * GZ(17) / xzoom;
- dest->y = (180 - MERCLAT(src->north_south)) / 360 * GZ(17) / xzoom;
- dest->z = 0;
-
- return TRUE;
-}
-
-void google_mapcoord_to_center_coord ( MapCoord *src, VikCoord *dest )
-{
- gdouble socalled_mpp = GZ(src->scale);
- dest->mode = VIK_COORD_LATLON;
- dest->east_west = ((src->x+0.5) / GZ(17) * socalled_mpp * 360) - 180;
- dest->north_south = DEMERCLAT(180 - ((src->y+0.5) / GZ(17) * socalled_mpp * 360));
-}
-
-static int real_google_download ( MapCoord *src, const gchar *dest_fn, const char *verstr )
-{
- int res;
- gchar *uri = g_strdup_printf ( "/mt?v=%s&x=%d&y=%d&zoom=%d", verstr, src->x, src->y, src->scale );
- res = a_http_download_get_url ( "mt.google.com", uri, dest_fn );
- g_free ( uri );
- return res;
-}
-
-static int google_download ( MapCoord *src, const gchar *dest_fn )
-{
- return(real_google_download ( src, dest_fn, GOOGLE_VERSION ));
-}
-
-static int google_trans_download ( MapCoord *src, const gchar *dest_fn )
-{
- return(real_google_download ( src, dest_fn, GOOGLE_TRANS_VERSION ));
-}
-
-static char *kh_encode(guint32 x, guint32 y, guint8 scale)
-{
- gchar *buf = g_malloc ( (20-scale)*sizeof(gchar) );
- guint32 ya = 1 << (17 - scale);
- gint8 i, j;
-
- if (y < 0 || (ya-1 < y)) {
- strcpy(buf,"tqq"); /* BAD */
- return buf;
- }
- if (x < 0 || ya-1 < x) {
- x %= ya;
- if (x < 0)
- x += ya;
- }
-
- buf[0] = 't';
- for (j = 1, i = 16; i >= scale; i--, j++) {
- ya /= 2;
- if (y < ya) {
- if (x < ya)
- buf[j]='q';
- else {
- buf[j]='r';
- x -= ya;
- }
- } else {
- if (x < ya) {
- buf[j] = 't';
- y -= ya;
- } else {
- buf[j] = 's';
- x -= ya;
- y -= ya;
- }
- }
- }
- buf[j] = '\0';
- return buf;
-}
-
-static int google_kh_download ( MapCoord *src, const gchar *dest_fn )
-{
- int res;
- gchar *khenc = kh_encode( src->x, src->y, src->scale );
- gchar *uri = g_strdup_printf ( "/kh?v=%s&t=%s", GOOGLE_KH_VERSION, khenc );
- g_free ( khenc );
- res = a_http_download_get_url ( "kh.google.com", uri, dest_fn );
- g_free ( uri );
- return(res);
}