2 * viking -- GPS Data and Topo Analyzer, Explorer, and Manager
4 * Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include <sys/types.h>
32 #include "background.h"
33 #include "vikwaypoint.h"
35 #include "vikviewport.h"
36 #include "viktreeview.h"
38 #include "vikaggregatelayer.h"
39 #include "viklayerspanel.h"
40 #include "vikdemlayer.h"
41 #include "vikdemlayer_pixmap.h"
42 #include "vikmapslayer.h"
48 #define MAPS_CACHE_DIR maps_layer_default_dir()
50 #define SRTM_CACHE_TEMPLATE "%ssrtm3-%s%s%c%02d%c%03d.hgt.zip"
51 #define SRTM_FTP_SITE "e0srp01u.ecs.nasa.gov"
52 #define SRTM_FTP_URI "/srtm/version2/SRTM3/"
54 #ifdef VIK_CONFIG_DEM24K
55 #define DEM24K_DOWNLOAD_SCRIPT "dem24k.pl"
59 static void dem_layer_marshall( VikDEMLayer *vdl, guint8 **data, gint *len );
60 static VikDEMLayer *dem_layer_unmarshall( guint8 *data, gint len, VikViewport *vvp );
61 static gboolean dem_layer_set_param ( VikDEMLayer *vdl, guint16 id, VikLayerParamData data, VikViewport *vp );
62 static VikLayerParamData dem_layer_get_param ( VikDEMLayer *vdl, guint16 id );
63 static void dem_layer_update_gc ( VikDEMLayer *vdl, VikViewport *vp, const gchar *color );
64 static void dem_layer_post_read ( VikLayer *vl, VikViewport *vp, gboolean from_file );
65 static void srtm_draw_existence ( VikViewport *vp );
67 #ifdef VIK_CONFIG_DEM24K
68 static void dem24k_draw_existence ( VikViewport *vp );
71 static VikLayerParamScale param_scales[] = {
77 static gchar *params_source[] = {
78 "SRTM Global 90m (3 arcsec)",
79 #ifdef VIK_CONFIG_DEM24K
85 enum { DEM_SOURCE_SRTM,
86 #ifdef VIK_CONFIG_DEM24K
92 static VikLayerParam dem_layer_params[] = {
93 { "files", VIK_LAYER_PARAM_STRING_LIST, VIK_LAYER_GROUP_NONE, "DEM Files:", VIK_LAYER_WIDGET_FILELIST },
94 { "source", VIK_LAYER_PARAM_UINT, VIK_LAYER_GROUP_NONE, "Download Source:", VIK_LAYER_WIDGET_RADIOGROUP_STATIC, params_source, NULL },
95 { "color", VIK_LAYER_PARAM_STRING, VIK_LAYER_GROUP_NONE, "Color:", VIK_LAYER_WIDGET_ENTRY },
96 { "min_elev", VIK_LAYER_PARAM_DOUBLE, VIK_LAYER_GROUP_NONE, "Min Elev:", VIK_LAYER_WIDGET_SPINBUTTON, param_scales + 0 },
97 { "max_elev", VIK_LAYER_PARAM_DOUBLE, VIK_LAYER_GROUP_NONE, "Max Elev:", VIK_LAYER_WIDGET_SPINBUTTON, param_scales + 0 },
98 { "line_thickness", VIK_LAYER_PARAM_UINT, VIK_LAYER_GROUP_NONE, "Line Thickness:", VIK_LAYER_WIDGET_SPINBUTTON, param_scales + 1 },
102 enum { PARAM_FILES=0, PARAM_SOURCE, PARAM_COLOR, PARAM_MIN_ELEV, PARAM_MAX_ELEV, PARAM_LINE_THICKNESS, NUM_PARAMS };
104 static gpointer dem_layer_download_create ( VikWindow *vw, VikViewport *vvp);
105 static gboolean dem_layer_download_release ( VikDEMLayer *vdl, GdkEventButton *event, VikViewport *vvp );
106 static gboolean dem_layer_download_click ( VikDEMLayer *vdl, GdkEventButton *event, VikViewport *vvp );
108 static VikToolInterface dem_tools[] = {
109 { "DEM Download/Import", (VikToolConstructorFunc) dem_layer_download_create, NULL, NULL, NULL,
110 (VikToolMouseFunc) dem_layer_download_click, NULL, (VikToolMouseFunc) dem_layer_download_release },
117 static gchar *dem_colors[] = {
223 static const guint DEM_N_COLORS = sizeof(dem_colors)/sizeof(dem_colors[0]);
226 VikLayerInterface vik_dem_layer_interface = {
231 sizeof(dem_tools) / sizeof(dem_tools[0]),
240 (VikLayerFuncCreate) vik_dem_layer_create,
241 (VikLayerFuncRealize) NULL,
243 (VikLayerFuncFree) vik_dem_layer_free,
245 (VikLayerFuncProperties) NULL,
246 (VikLayerFuncDraw) vik_dem_layer_draw,
247 (VikLayerFuncChangeCoordMode) NULL,
249 (VikLayerFuncSetMenuItemsSelection) NULL,
250 (VikLayerFuncGetMenuItemsSelection) NULL,
252 (VikLayerFuncAddMenuItems) NULL,
253 (VikLayerFuncSublayerAddMenuItems) NULL,
255 (VikLayerFuncSublayerRenameRequest) NULL,
256 (VikLayerFuncSublayerToggleVisible) NULL,
258 (VikLayerFuncMarshall) dem_layer_marshall,
259 (VikLayerFuncUnmarshall) dem_layer_unmarshall,
261 (VikLayerFuncSetParam) dem_layer_set_param,
262 (VikLayerFuncGetParam) dem_layer_get_param,
264 (VikLayerFuncReadFileData) NULL,
265 (VikLayerFuncWriteFileData) NULL,
267 (VikLayerFuncDeleteItem) NULL,
268 (VikLayerFuncCopyItem) NULL,
269 (VikLayerFuncPasteItem) NULL,
270 (VikLayerFuncFreeCopiedItem) NULL,
271 (VikLayerFuncDragDropRequest) NULL,
274 struct _VikDEMLayer {
281 guint8 line_thickness;
286 GType vik_dem_layer_get_type ()
288 static GType vdl_type = 0;
292 static const GTypeInfo vdl_info =
294 sizeof (VikDEMLayerClass),
295 NULL, /* base_init */
296 NULL, /* base_finalize */
297 NULL, /* class init */
298 NULL, /* class_finalize */
299 NULL, /* class_data */
300 sizeof (VikDEMLayer),
302 NULL /* instance init */
304 vdl_type = g_type_register_static ( VIK_LAYER_TYPE, "VikDEMLayer", &vdl_info, 0 );
310 static void dem_layer_marshall( VikDEMLayer *vdl, guint8 **data, gint *len )
312 vik_layer_marshall_params ( VIK_LAYER(vdl), data, len );
315 static VikDEMLayer *dem_layer_unmarshall( guint8 *data, gint len, VikViewport *vvp )
317 VikDEMLayer *rv = vik_dem_layer_new ();
320 /* TODO: share GCS between layers */
321 for ( i = 0; i < DEM_N_COLORS; i++ )
322 rv->gcs[i] = vik_viewport_new_gc ( vvp, dem_colors[i], rv->line_thickness );
324 vik_layer_unmarshall_params ( VIK_LAYER(rv), data, len, vvp );
328 gboolean dem_layer_set_param ( VikDEMLayer *vdl, guint16 id, VikLayerParamData data, VikViewport *vp )
332 case PARAM_COLOR: if ( vdl->color ) g_free ( vdl->color ); vdl->color = g_strdup ( data.s ); break;
333 case PARAM_SOURCE: vdl->source = data.u; break;
334 case PARAM_MIN_ELEV: vdl->min_elev = data.d; break;
335 case PARAM_MAX_ELEV: vdl->max_elev = data.d; break;
336 case PARAM_LINE_THICKNESS: if ( data.u >= 1 && data.u <= 15 ) vdl->line_thickness = data.u; break;
337 case PARAM_FILES: a_dems_load_list ( &(data.sl) ); a_dems_list_free ( vdl->files ); vdl->files = data.sl; break;
342 static VikLayerParamData dem_layer_get_param ( VikDEMLayer *vdl, guint16 id )
344 VikLayerParamData rv;
347 case PARAM_FILES: rv.sl = vdl->files; break;
348 case PARAM_SOURCE: rv.u = vdl->source; break;
349 case PARAM_COLOR: rv.s = vdl->color ? vdl->color : ""; break;
350 case PARAM_MIN_ELEV: rv.d = vdl->min_elev; break;
351 case PARAM_MAX_ELEV: rv.d = vdl->max_elev; break;
352 case PARAM_LINE_THICKNESS: rv.i = vdl->line_thickness; break;
357 static void dem_layer_post_read ( VikLayer *vl, VikViewport *vp, gboolean from_file )
359 VikDEMLayer *vdl = VIK_DEM_LAYER(vl);
361 g_object_unref ( G_OBJECT(vdl->gc) );
363 vdl->gc = vik_viewport_new_gc ( vp, vdl->color, vdl->line_thickness );
366 VikDEMLayer *vik_dem_layer_new ( )
368 VikDEMLayer *vdl = VIK_DEM_LAYER ( g_object_new ( VIK_DEM_LAYER_TYPE, NULL ) );
370 vik_layer_init ( VIK_LAYER(vdl), VIK_LAYER_DEM );
377 vdl->gcs = g_malloc(sizeof(GdkGC *)*DEM_N_COLORS);
378 /* make new gcs only if we need it (copy layer -> use old) */
381 vdl->max_elev = 1000.0;
382 vdl->source = DEM_SOURCE_SRTM;
383 vdl->line_thickness = 3;
390 static void vik_dem_layer_draw_dem ( VikDEMLayer *vdl, VikViewport *vp, VikDEM *dem )
392 VikDEMColumn *column;
394 struct LatLon dem_northeast, dem_southwest;
395 gdouble max_lat, max_lon, min_lat, min_lon;
397 /**** Check if viewport and DEM data overlap ****/
399 /* get min, max lat/lon of viewport */
400 vik_viewport_get_min_max_lat_lon ( vp, &min_lat, &max_lat, &min_lon, &max_lon );
402 /* get min, max lat/lon of DEM data */
403 if ( dem->horiz_units == VIK_DEM_HORIZ_LL_ARCSECONDS ) {
404 dem_northeast.lat = dem->max_north / 3600.0;
405 dem_northeast.lon = dem->max_east / 3600.0;
406 dem_southwest.lat = dem->min_north / 3600.0;
407 dem_southwest.lon = dem->min_east / 3600.0;
408 } else if ( dem->horiz_units == VIK_DEM_HORIZ_UTM_METERS ) {
409 struct UTM dem_northeast_utm, dem_southwest_utm;
410 dem_northeast_utm.northing = dem->max_north;
411 dem_northeast_utm.easting = dem->max_east;
412 dem_southwest_utm.northing = dem->min_north;
413 dem_southwest_utm.easting = dem->min_east;
414 dem_northeast_utm.zone = dem_southwest_utm.zone = dem->utm_zone;
415 dem_northeast_utm.letter = dem_southwest_utm.letter = dem->utm_letter;
417 a_coords_utm_to_latlon(&dem_northeast_utm, &dem_northeast);
418 a_coords_utm_to_latlon(&dem_southwest_utm, &dem_southwest);
421 if ( (max_lat > dem_northeast.lat && min_lat > dem_northeast.lat) ||
422 (max_lat < dem_southwest.lat && min_lat < dem_southwest.lat) )
424 else if ( (max_lon > dem_northeast.lon && min_lon > dem_northeast.lon) ||
425 (max_lon < dem_southwest.lon && min_lon < dem_southwest.lon) )
427 /* else they overlap */
429 /**** End Overlap Check ****/
430 /* boxes to show where we have DEM instead of actually drawing the DEM.
431 * useful if we want to see what areas we have coverage for (if we want
432 * to get elevation data for a track) but don't want to cover the map.
436 /* draw a box if a DEM is loaded. in future I'd like to add an option for this
437 * this is useful if we want to see what areas we have dem for but don't want to
438 * cover the map (or maybe we just need translucent DEM?) */
440 VikCoord demne, demsw;
442 vik_coord_load_from_latlon(&demne, vik_viewport_get_coord_mode(vp), &dem_northeast);
443 vik_coord_load_from_latlon(&demsw, vik_viewport_get_coord_mode(vp), &dem_southwest);
445 vik_viewport_coord_to_screen ( vp, &demne, &x1, &y1 );
446 vik_viewport_coord_to_screen ( vp, &demsw, &x2, &y2 );
448 if ( x1 > vik_viewport_get_width(vp) ) x1=vik_viewport_get_width(vp);
449 if ( y2 > vik_viewport_get_height(vp) ) y2=vik_viewport_get_height(vp);
450 if ( x2 < 0 ) x2 = 0;
451 if ( y1 < 0 ) y1 = 0;
452 vik_viewport_draw_rectangle ( vp, GTK_WIDGET(vp)->style->black_gc,
453 FALSE, x2, y1, x1-x2, y2-y1 );
458 if ( dem->horiz_units == VIK_DEM_HORIZ_LL_ARCSECONDS ) {
459 VikCoord tmp; /* TODO: don't use coord_load_from_latlon, especially if in latlon drawing mode */
461 gdouble max_lat_as, max_lon_as, min_lat_as, min_lon_as;
462 gdouble start_lat_as, end_lat_as, start_lon_as, end_lon_as;
464 gdouble start_lat, end_lat, start_lon, end_lon;
466 struct LatLon counter;
468 guint x, y, start_x, start_y;
472 guint skip_factor = ceil ( vik_viewport_get_xmpp(vp) / 40 ); /* todo: smarter calculation. */
474 gdouble nscale_deg = dem->north_scale / ((gdouble) 3600);
475 gdouble escale_deg = dem->east_scale / ((gdouble) 3600);
477 max_lat_as = max_lat * 3600;
478 min_lat_as = min_lat * 3600;
479 max_lon_as = max_lon * 3600;
480 min_lon_as = min_lon * 3600;
482 start_lat_as = MAX(min_lat_as, dem->min_north);
483 end_lat_as = MIN(max_lat_as, dem->max_north);
484 start_lon_as = MAX(min_lon_as, dem->min_east);
485 end_lon_as = MIN(max_lon_as, dem->max_east);
487 start_lat = floor(start_lat_as / dem->north_scale) * nscale_deg;
488 end_lat = ceil (end_lat_as / dem->north_scale) * nscale_deg;
489 start_lon = floor(start_lon_as / dem->east_scale) * escale_deg;
490 end_lon = ceil (end_lon_as / dem->east_scale) * escale_deg;
492 vik_dem_east_north_to_xy ( dem, start_lon_as, start_lat_as, &start_x, &start_y );
494 /* verify sane elev interval */
495 if ( vdl->max_elev <= vdl->min_elev )
496 vdl->max_elev = vdl->min_elev + 1;
498 for ( x=start_x, counter.lon = start_lon; counter.lon <= end_lon; counter.lon += escale_deg * skip_factor, x += skip_factor ) {
499 if ( x > 0 && x < dem->n_columns ) {
500 column = g_ptr_array_index ( dem->columns, x );
501 for ( y=start_y, counter.lat = start_lat; counter.lat <= end_lat; counter.lat += nscale_deg * skip_factor, y += skip_factor ) {
502 if ( y > column->n_points )
504 elev = column->points[y];
506 if ( elev != VIK_DEM_INVALID_ELEVATION && elev < vdl->min_elev )
508 if ( elev != VIK_DEM_INVALID_ELEVATION && elev > vdl->max_elev )
515 vik_coord_load_from_latlon(&tmp, vik_viewport_get_coord_mode(vp), &counter);
516 vik_viewport_coord_to_screen(vp, &tmp, &a, &b);
517 if ( elev == VIK_DEM_INVALID_ELEVATION )
518 ; /* don't draw it */
519 else if ( elev <= 0 )
520 vik_viewport_draw_rectangle(vp, vdl->gcs[0], TRUE, a-2, b-2, 4, 4 );
522 vik_viewport_draw_rectangle(vp, vdl->gcs[(gint)floor((elev - vdl->min_elev)/(vdl->max_elev - vdl->min_elev)*(DEM_N_COLORS-2))+1], TRUE, a-2, b-2, 4, 4 );
527 } else if ( dem->horiz_units == VIK_DEM_HORIZ_UTM_METERS ) {
528 gdouble max_nor, max_eas, min_nor, min_eas;
529 gdouble start_nor, start_eas, end_nor, end_eas;
533 guint x, y, start_x, start_y;
535 VikCoord tmp; /* TODO: don't use coord_load_from_latlon, especially if in latlon drawing mode */
538 guint skip_factor = ceil ( vik_viewport_get_xmpp(vp) / 10 ); /* todo: smarter calculation. */
540 VikCoord tleft, tright, bleft, bright;
542 vik_viewport_screen_to_coord ( vp, 0, 0, &tleft );
543 vik_viewport_screen_to_coord ( vp, vik_viewport_get_width(vp), 0, &tright );
544 vik_viewport_screen_to_coord ( vp, 0, vik_viewport_get_height(vp), &bleft );
545 vik_viewport_screen_to_coord ( vp, vik_viewport_get_width(vp), vik_viewport_get_height(vp), &bright );
548 vik_coord_convert(&tleft, VIK_COORD_UTM);
549 vik_coord_convert(&tright, VIK_COORD_UTM);
550 vik_coord_convert(&bleft, VIK_COORD_UTM);
551 vik_coord_convert(&bright, VIK_COORD_UTM);
553 max_nor = MAX(tleft.north_south, tright.north_south);
554 min_nor = MIN(bleft.north_south, bright.north_south);
555 max_eas = MAX(bright.east_west, tright.east_west);
556 min_eas = MIN(bleft.east_west, tleft.east_west);
558 start_nor = MAX(min_nor, dem->min_north);
559 end_nor = MIN(max_nor, dem->max_north);
560 if ( tleft.utm_zone == dem->utm_zone && bleft.utm_zone == dem->utm_zone
561 && (tleft.utm_letter >= 'N') == (dem->utm_letter >= 'N')
562 && (bleft.utm_letter >= 'N') == (dem->utm_letter >= 'N') ) /* if the utm zones/hemispheres are different, min_eas will be bogus */
563 start_eas = MAX(min_eas, dem->min_east);
565 start_eas = dem->min_east;
566 if ( tright.utm_zone == dem->utm_zone && bright.utm_zone == dem->utm_zone
567 && (tright.utm_letter >= 'N') == (dem->utm_letter >= 'N')
568 && (bright.utm_letter >= 'N') == (dem->utm_letter >= 'N') ) /* if the utm zones/hemispheres are different, min_eas will be bogus */
569 end_eas = MIN(max_eas, dem->max_east);
571 end_eas = dem->max_east;
573 start_nor = floor(start_nor / dem->north_scale) * dem->north_scale;
574 end_nor = ceil (end_nor / dem->north_scale) * dem->north_scale;
575 start_eas = floor(start_eas / dem->east_scale) * dem->east_scale;
576 end_eas = ceil (end_eas / dem->east_scale) * dem->east_scale;
578 vik_dem_east_north_to_xy ( dem, start_eas, start_nor, &start_x, &start_y );
580 /* TODO: why start_x and start_y are -1 -- rounding error from above? */
582 counter.zone = dem->utm_zone;
583 counter.letter = dem->utm_letter;
585 for ( x=start_x, counter.easting = start_eas; counter.easting <= end_eas; counter.easting += dem->east_scale * skip_factor, x += skip_factor ) {
586 if ( x > 0 && x < dem->n_columns ) {
587 column = g_ptr_array_index ( dem->columns, x );
588 for ( y=start_y, counter.northing = start_nor; counter.northing <= end_nor; counter.northing += dem->north_scale * skip_factor, y += skip_factor ) {
589 if ( y > column->n_points )
591 elev = column->points[y];
592 if ( elev != VIK_DEM_INVALID_ELEVATION && elev < vdl->min_elev )
594 if ( elev != VIK_DEM_INVALID_ELEVATION && elev > vdl->max_elev )
599 vik_coord_load_from_utm(&tmp, vik_viewport_get_coord_mode(vp), &counter);
600 vik_viewport_coord_to_screen(vp, &tmp, &a, &b);
601 if ( elev == VIK_DEM_INVALID_ELEVATION )
602 ; /* don't draw it */
603 else if ( elev <= 0 )
604 vik_viewport_draw_rectangle(vp, vdl->gcs[0], TRUE, a-2, b-2, 4, 4 );
606 vik_viewport_draw_rectangle(vp, vdl->gcs[(gint)floor((elev - vdl->min_elev)/(vdl->max_elev - vdl->min_elev)*(DEM_N_COLORS-2))+1], TRUE, a-2, b-2, 4, 4 );
614 /* return the continent for the specified lat, lon */
616 static const gchar *srtm_continent_dir ( gint lat, gint lon )
618 extern const char *_srtm_continent_data[];
619 static GHashTable *srtm_continent = NULL;
620 const gchar *continent;
623 if (!srtm_continent) {
626 srtm_continent = g_hash_table_new(g_str_hash, g_str_equal);
627 s = _srtm_continent_data;
628 while (*s != (gchar *)-1) {
631 g_hash_table_insert(srtm_continent, *s, continent);
637 g_snprintf(name, sizeof(name), "%c%02d%c%03d",
638 (lat >= 0) ? 'N' : 'S', ABS(lat),
639 (lon >= 0) ? 'E' : 'W', ABS(lon));
641 return(g_hash_table_lookup(srtm_continent, name));
644 void vik_dem_layer_draw ( VikDEMLayer *vdl, gpointer data )
646 VikViewport *vp = (VikViewport *) data;
647 GList *dems_iter = vdl->files;
651 /* search for SRTM3 90m */
653 if ( vdl->source == DEM_SOURCE_SRTM )
654 srtm_draw_existence ( vp );
655 #ifdef VIK_CONFIG_DEM24K
656 else if ( vdl->source == DEM_SOURCE_DEM24K )
657 dem24k_draw_existence ( vp );
660 while ( dems_iter ) {
661 dem = a_dems_get ( (const char *) (dems_iter->data) );
663 vik_dem_layer_draw_dem ( vdl, vp, dem );
664 dems_iter = dems_iter->next;
668 void vik_dem_layer_free ( VikDEMLayer *vdl )
671 if ( vdl->gc != NULL )
672 g_object_unref ( G_OBJECT(vdl->gc) );
674 if ( vdl->color != NULL )
675 g_free ( vdl->color );
678 for ( i = 0; i < DEM_N_COLORS; i++ )
679 g_object_unref ( vdl->gcs[i] );
682 a_dems_list_free ( vdl->files );
685 static void dem_layer_update_gc ( VikDEMLayer *vdl, VikViewport *vp, const gchar *color )
688 g_free ( vdl->color );
690 vdl->color = g_strdup ( color );
693 g_object_unref ( G_OBJECT(vdl->gc) );
695 vdl->gc = vik_viewport_new_gc ( vp, vdl->color, vdl->line_thickness );
698 VikDEMLayer *vik_dem_layer_create ( VikViewport *vp )
700 VikDEMLayer *vdl = vik_dem_layer_new ();
703 /* TODO: share GCS between layers */
704 for ( i = 0; i < DEM_N_COLORS; i++ )
705 vdl->gcs[i] = vik_viewport_new_gc ( vp, dem_colors[i], vdl->line_thickness );
707 dem_layer_update_gc ( vdl, vp, "red" );
710 /**************************************************************
711 **** SOURCES & DOWNLOADING
712 **************************************************************/
718 VikDEMLayer *vdl; /* NULL if not alive */
724 /**************************************************
726 **************************************************/
728 static void srtm_dem_download_thread ( DEMDownloadParams *p, gpointer threaddata )
731 const gchar *continent_dir;
733 intlat = (int)floor(p->lat);
734 intlon = (int)floor(p->lon);
735 continent_dir = srtm_continent_dir(intlat, intlon);
737 if (!continent_dir) {
738 g_warning("No SRTM data available for %f, %f\n", p->lat, p->lon);
742 gchar *src_fn = g_strdup_printf("%s%s%s%c%02d%c%03d.hgt.zip",
746 (intlat >= 0) ? 'N' : 'S',
748 (intlon >= 0) ? 'E' : 'W',
751 DownloadOptions options = { NULL, 0 };
752 a_ftp_download_get_url ( SRTM_FTP_SITE, src_fn, p->dest, &options );
756 static gchar *srtm_lat_lon_to_dest_fn ( gdouble lat, gdouble lon )
759 const gchar *continent_dir;
761 intlat = (int)floor(lat);
762 intlon = (int)floor(lon);
763 continent_dir = srtm_continent_dir(intlat, intlon);
766 continent_dir = "nowhere";
768 return g_strdup_printf("srtm3-%s%s%c%02d%c%03d.hgt.zip",
771 (intlat >= 0) ? 'N' : 'S',
773 (intlon >= 0) ? 'E' : 'W',
778 /* TODO: generalize */
779 static void srtm_draw_existence ( VikViewport *vp )
781 gdouble max_lat, max_lon, min_lat, min_lon;
782 gchar buf[strlen(MAPS_CACHE_DIR)+strlen(SRTM_CACHE_TEMPLATE)+30];
785 vik_viewport_get_min_max_lat_lon ( vp, &min_lat, &max_lat, &min_lon, &max_lon );
787 for (i = floor(min_lat); i <= floor(max_lat); i++) {
788 for (j = floor(min_lon); j <= floor(max_lon); j++) {
789 const gchar *continent_dir;
790 if ((continent_dir = srtm_continent_dir(i, j)) == NULL)
792 g_snprintf(buf, sizeof(buf), SRTM_CACHE_TEMPLATE,
796 (i >= 0) ? 'N' : 'S',
798 (j >= 0) ? 'E' : 'W',
800 if ( access(buf, F_OK ) == 0 ) {
805 sw.mode = VIK_COORD_LATLON;
806 ne.north_south = i+1;
808 ne.mode = VIK_COORD_LATLON;
809 vik_viewport_coord_to_screen ( vp, &sw, &x1, &y1 );
810 vik_viewport_coord_to_screen ( vp, &ne, &x2, &y2 );
811 if ( x1 < 0 ) x1 = 0;
812 if ( y2 < 0 ) y2 = 0;
813 vik_viewport_draw_rectangle ( vp, GTK_WIDGET(vp)->style->black_gc,
814 FALSE, x1, y2, x2-x1, y1-y2 );
821 /**************************************************
823 **************************************************/
825 #ifdef VIK_CONFIG_DEM24K
827 static void dem24k_dem_download_thread ( DEMDownloadParams *p, gpointer threaddata )
830 gchar *cmdline = g_strdup_printf("%s %.03f %.03f",
831 DEM24K_DOWNLOAD_SCRIPT,
834 /* FIX: don't use system, use execv or something. check for existence */
838 static gchar *dem24k_lat_lon_to_dest_fn ( gdouble lat, gdouble lon )
840 return g_strdup_printf("dem24k/%d/%d/%.03f,%.03f.dem",
847 /* TODO: generalize */
848 static void dem24k_draw_existence ( VikViewport *vp )
850 gdouble max_lat, max_lon, min_lat, min_lon;
851 gchar buf[strlen(MAPS_CACHE_DIR)+40];
854 vik_viewport_get_min_max_lat_lon ( vp, &min_lat, &max_lat, &min_lon, &max_lon );
856 for (i = floor(min_lat*8)/8; i <= floor(max_lat*8)/8; i+=0.125) {
857 /* check lat dir first -- faster */
858 g_snprintf(buf, sizeof(buf), "%sdem24k/%d/",
861 if ( access(buf, F_OK) != 0 )
863 for (j = floor(min_lon*8)/8; j <= floor(max_lon*8)/8; j+=0.125) {
864 /* check lon dir first -- faster */
865 g_snprintf(buf, sizeof(buf), "%sdem24k/%d/%d/",
869 if ( access(buf, F_OK) != 0 )
871 g_snprintf(buf, sizeof(buf), "%sdem24k/%d/%d/%.03f,%.03f.dem",
877 if ( access(buf, F_OK ) == 0 ) {
881 sw.east_west = j-0.125;
882 sw.mode = VIK_COORD_LATLON;
883 ne.north_south = i+0.125;
885 ne.mode = VIK_COORD_LATLON;
886 vik_viewport_coord_to_screen ( vp, &sw, &x1, &y1 );
887 vik_viewport_coord_to_screen ( vp, &ne, &x2, &y2 );
888 if ( x1 < 0 ) x1 = 0;
889 if ( y2 < 0 ) y2 = 0;
890 vik_viewport_draw_rectangle ( vp, GTK_WIDGET(vp)->style->black_gc,
891 FALSE, x1, y2, x2-x1, y1-y2 );
898 /**************************************************
899 * SOURCES -- DOWNLOADING & IMPORTING TOOL *
900 **************************************************
903 static void weak_ref_cb ( gpointer ptr, GObject * dead_vdl )
905 DEMDownloadParams *p = ptr;
906 g_mutex_lock ( p->mutex );
908 g_mutex_unlock ( p->mutex );
911 /* Try to add file full_path.
912 * full_path will be copied.
913 * returns FALSE if file does not exists, TRUE otherwise.
915 static gboolean dem_layer_add_file ( VikDEMLayer *vdl, const gchar *full_path )
917 if ( access(full_path, F_OK ) == 0 ) {
918 /* only load if file size is not 0 (not in progress */
920 stat (full_path, &sb);
922 gchar *duped_path = g_strdup(full_path);
923 vdl->files = g_list_prepend ( vdl->files, duped_path );
924 a_dems_load ( duped_path );
925 g_warning(duped_path);
926 vik_layer_emit_update ( VIK_LAYER(vdl) );
933 static void dem_download_thread ( DEMDownloadParams *p, gpointer threaddata )
935 if ( p->source == DEM_SOURCE_SRTM )
936 srtm_dem_download_thread ( p, threaddata );
937 #ifdef VIK_CONFIG_DEM24K
938 else if ( p->source == DEM_SOURCE_DEM24K )
939 dem24k_dem_download_thread ( p, threaddata );
943 g_mutex_lock ( p->mutex );
945 g_object_weak_unref ( G_OBJECT(p->vdl), weak_ref_cb, p );
947 if ( dem_layer_add_file ( p->vdl, p->dest ) )
948 vik_layer_emit_update ( VIK_LAYER(p->vdl) );
950 g_mutex_unlock ( p->mutex );
955 static void free_dem_download_params ( DEMDownloadParams *p )
957 g_mutex_free ( p->mutex );
962 static gpointer dem_layer_download_create ( VikWindow *vw, VikViewport *vvp)
968 static gboolean dem_layer_download_release ( VikDEMLayer *vdl, GdkEventButton *event, VikViewport *vvp )
974 gchar *dem_file = NULL;
976 if ( vdl->source == DEM_SOURCE_NONE )
977 a_dialog_error_msg ( VIK_GTK_WINDOW_FROM_LAYER(vdl), "No download source selected. Edit layer properties." );
979 vik_viewport_screen_to_coord ( vvp, event->x, event->y, &coord );
980 vik_coord_to_latlon ( &coord, &ll );
983 if ( vdl->source == DEM_SOURCE_SRTM )
984 dem_file = srtm_lat_lon_to_dest_fn ( ll.lat, ll.lon );
985 #ifdef VIK_CONFIG_DEM24K
986 else if ( vdl->source == DEM_SOURCE_DEM24K )
987 dem_file = dem24k_lat_lon_to_dest_fn ( ll.lat, ll.lon );
993 full_path = g_strdup_printf("%s%s", MAPS_CACHE_DIR, dem_file );
995 g_warning(full_path);
997 // TODO: check if already in filelist
999 if ( ! dem_layer_add_file(vdl, full_path) ) {
1000 gchar *tmp = g_strdup_printf ( "Downloading DEM %s ", dem_file );
1001 DEMDownloadParams *p = g_malloc(sizeof(DEMDownloadParams));
1002 p->dest = g_strdup(full_path);
1006 p->mutex = g_mutex_new();
1007 p->source = vdl->source;
1008 g_object_weak_ref(G_OBJECT(p->vdl), weak_ref_cb, p );
1010 a_background_thread ( VIK_GTK_WINDOW_FROM_LAYER(vdl), tmp,
1011 (vik_thr_func) dem_download_thread, p,
1012 (vik_thr_free_func) free_dem_download_params, NULL, 1 );
1015 g_free ( dem_file );
1016 g_free ( full_path );
1021 static gboolean dem_layer_download_click ( VikDEMLayer *vdl, GdkEventButton *event, VikViewport *vvp )
1023 /* choose & keep track of cache dir
1024 * download in background thread
1025 * download over area */