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Fix bugs that caused odd display of date/time on track properties dialog.
[andy/viking.git] / src / vikdemlayer.c
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1/*
2 * viking -- GPS Data and Topo Analyzer, Explorer, and Manager
3 *
4 * Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net>
5 *
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.
10 *
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.
15 *
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
19 *
20 */
21#include <math.h>
22#include <sys/types.h>
23#include <sys/stat.h>
24#include <string.h>
25#include <stdlib.h>
26
27#include "config.h"
28#include "globals.h"
29#include "coords.h"
30#include "vikcoord.h"
31#include "download.h"
32#include "background.h"
33#include "vikwaypoint.h"
34#include "viktrack.h"
35#include "vikviewport.h"
36#include "viktreeview.h"
37#include "viklayer.h"
38#include "vikaggregatelayer.h"
39#include "viklayerspanel.h"
40#include "vikdemlayer.h"
41#include "vikdemlayer_pixmap.h"
42#include "vikmapslayer.h"
43#include "dialog.h"
44
45#include "dem.h"
46#include "dems.h"
47
48#define MAPS_CACHE_DIR maps_layer_default_dir()
49
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/"
53
54#ifdef VIK_CONFIG_DEM24K
55#define DEM24K_DOWNLOAD_SCRIPT "dem24k.pl"
56#endif
57
58
59static void dem_layer_marshall( VikDEMLayer *vdl, guint8 **data, gint *len );
60static VikDEMLayer *dem_layer_unmarshall( guint8 *data, gint len, VikViewport *vvp );
61static gboolean dem_layer_set_param ( VikDEMLayer *vdl, guint16 id, VikLayerParamData data, VikViewport *vp );
62static VikLayerParamData dem_layer_get_param ( VikDEMLayer *vdl, guint16 id );
63static void dem_layer_update_gc ( VikDEMLayer *vdl, VikViewport *vp, const gchar *color );
64static void dem_layer_post_read ( VikLayer *vl, VikViewport *vp, gboolean from_file );
65static void srtm_draw_existence ( VikViewport *vp );
66
67#ifdef VIK_CONFIG_DEM24K
68static void dem24k_draw_existence ( VikViewport *vp );
69#endif
70
71static VikLayerParamScale param_scales[] = {
72 { 1, 10000, 10, 1 },
73 { 1, 10000, 10, 1 },
74 { 1, 10, 1, 0 },
75};
76
77static gchar *params_source[] = {
78 "SRTM Global 90m (3 arcsec)",
79#ifdef VIK_CONFIG_DEM24K
80 "USA 10m (USGS 24k)",
81#endif
82 "None",
83 };
84
85enum { DEM_SOURCE_SRTM,
86#ifdef VIK_CONFIG_DEM24K
87 DEM_SOURCE_DEM24K,
88#endif
89 DEM_SOURCE_NONE,
90 };
91
92static 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 },
99};
100
101
102enum { PARAM_FILES=0, PARAM_SOURCE, PARAM_COLOR, PARAM_MIN_ELEV, PARAM_MAX_ELEV, PARAM_LINE_THICKNESS, NUM_PARAMS };
103
104static gpointer dem_layer_download_create ( VikWindow *vw, VikViewport *vvp);
105static gboolean dem_layer_download_release ( VikDEMLayer *vdl, GdkEventButton *event, VikViewport *vvp );
106static gboolean dem_layer_download_click ( VikDEMLayer *vdl, GdkEventButton *event, VikViewport *vvp );
107
108static 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 },
111};
112
113
114/*
115*/
116
117static gchar *dem_colors[] = {
118"#0000FF",
119"#9b793c",
120"#9c7d40",
121"#9d8144",
122"#9e8549",
123"#9f894d",
124"#a08d51",
125"#a29156",
126"#a3955a",
127"#a4995e",
128"#a69d63",
129"#a89f65",
130"#aaa267",
131"#ada569",
132"#afa76b",
133"#b1aa6d",
134"#b4ad6f",
135"#b6b071",
136"#b9b373",
137"#bcb676",
138"#beb978",
139"#c0bc7a",
140"#c2c07d",
141"#c4c37f",
142"#c6c681",
143"#c8ca84",
144"#cacd86",
145"#ccd188",
146"#cfd58b",
147"#c2ce84",
148"#b5c87e",
149"#a9c278",
150"#9cbb71",
151"#8fb56b",
152"#83af65",
153"#76a95e",
154"#6aa358",
155"#5e9d52",
156"#63a055",
157"#69a458",
158"#6fa85c",
159"#74ac5f",
160"#7ab063",
161"#80b467",
162"#86b86a",
163"#8cbc6e",
164"#92c072",
165"#94c175",
166"#97c278",
167"#9ac47c",
168"#9cc57f",
169"#9fc682",
170"#a2c886",
171"#a4c989",
172"#a7cb8d",
173"#aacd91",
174"#afce99",
175"#b5d0a1",
176"#bbd2aa",
177"#c0d3b2",
178"#c6d5ba",
179"#ccd7c3",
180"#d1d9cb",
181"#d7dbd4",
182"#DDDDDD",
183"#e0e0e0",
184"#e4e4e4",
185"#e8e8e8",
186"#ebebeb",
187"#efefef",
188"#f3f3f3",
189"#f7f7f7",
190"#fbfbfb",
191"#ffffff"
192};
193
194/*
195"#9b793c",
196"#9e8549",
197"#a29156",
198"#a69d63",
199"#ada569",
200"#b4ad6f",
201"#bcb676",
202"#c2c07d",
203"#c8ca84",
204"#cfd58b",
205"#a9c278",
206"#83af65",
207"#5e9d52",
208"#6fa85c",
209"#80b467",
210"#92c072",
211"#9ac47c",
212"#a2c886",
213"#aacd91",
214"#bbd2aa",
215"#ccd7c3",
216"#DDDDDD",
217"#e8e8e8",
218"#f3f3f3",
219"#FFFFFF"
220};
221*/
222
223static const guint DEM_N_COLORS = sizeof(dem_colors)/sizeof(dem_colors[0]);
224
225
226VikLayerInterface vik_dem_layer_interface = {
227 "DEM",
228 &demlayer_pixbuf,
229
230 dem_tools,
231 sizeof(dem_tools) / sizeof(dem_tools[0]),
232
233 dem_layer_params,
234 NUM_PARAMS,
235 NULL,
236 0,
237
238 VIK_MENU_ITEM_ALL,
239
240 (VikLayerFuncCreate) vik_dem_layer_create,
241 (VikLayerFuncRealize) NULL,
242 dem_layer_post_read,
243 (VikLayerFuncFree) vik_dem_layer_free,
244
245 (VikLayerFuncProperties) NULL,
246 (VikLayerFuncDraw) vik_dem_layer_draw,
247 (VikLayerFuncChangeCoordMode) NULL,
248
249 (VikLayerFuncSetMenuItemsSelection) NULL,
250 (VikLayerFuncGetMenuItemsSelection) NULL,
251
252 (VikLayerFuncAddMenuItems) NULL,
253 (VikLayerFuncSublayerAddMenuItems) NULL,
254
255 (VikLayerFuncSublayerRenameRequest) NULL,
256 (VikLayerFuncSublayerToggleVisible) NULL,
257
258 (VikLayerFuncMarshall) dem_layer_marshall,
259 (VikLayerFuncUnmarshall) dem_layer_unmarshall,
260
261 (VikLayerFuncSetParam) dem_layer_set_param,
262 (VikLayerFuncGetParam) dem_layer_get_param,
263
264 (VikLayerFuncReadFileData) NULL,
265 (VikLayerFuncWriteFileData) NULL,
266
267 (VikLayerFuncDeleteItem) NULL,
268 (VikLayerFuncCopyItem) NULL,
269 (VikLayerFuncPasteItem) NULL,
270 (VikLayerFuncFreeCopiedItem) NULL,
271 (VikLayerFuncDragDropRequest) NULL,
272};
273
274struct _VikDEMLayer {
275 VikLayer vl;
276 GdkGC *gc;
277 GdkGC **gcs;
278 GList *files;
279 gdouble min_elev;
280 gdouble max_elev;
281 guint8 line_thickness;
282 gchar *color;
283 guint source;
284};
285
286GType vik_dem_layer_get_type ()
287{
288 static GType vdl_type = 0;
289
290 if (!vdl_type)
291 {
292 static const GTypeInfo vdl_info =
293 {
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),
301 0,
302 NULL /* instance init */
303 };
304 vdl_type = g_type_register_static ( VIK_LAYER_TYPE, "VikDEMLayer", &vdl_info, 0 );
305 }
306
307 return vdl_type;
308}
309
310static void dem_layer_marshall( VikDEMLayer *vdl, guint8 **data, gint *len )
311{
312 vik_layer_marshall_params ( VIK_LAYER(vdl), data, len );
313}
314
315static VikDEMLayer *dem_layer_unmarshall( guint8 *data, gint len, VikViewport *vvp )
316{
317 VikDEMLayer *rv = vik_dem_layer_new ();
318 gint i;
319
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 );
323
324 vik_layer_unmarshall_params ( VIK_LAYER(rv), data, len, vvp );
325 return rv;
326}
327
328gboolean dem_layer_set_param ( VikDEMLayer *vdl, guint16 id, VikLayerParamData data, VikViewport *vp )
329{
330 switch ( id )
331 {
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;
338 }
339 return TRUE;
340}
341
342static VikLayerParamData dem_layer_get_param ( VikDEMLayer *vdl, guint16 id )
343{
344 VikLayerParamData rv;
345 switch ( id )
346 {
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;
353 }
354 return rv;
355}
356
357static void dem_layer_post_read ( VikLayer *vl, VikViewport *vp, gboolean from_file )
358{
359 VikDEMLayer *vdl = VIK_DEM_LAYER(vl);
360 if ( vdl->gc )
361 g_object_unref ( G_OBJECT(vdl->gc) );
362
363 vdl->gc = vik_viewport_new_gc ( vp, vdl->color, vdl->line_thickness );
364}
365
366VikDEMLayer *vik_dem_layer_new ( )
367{
368 VikDEMLayer *vdl = VIK_DEM_LAYER ( g_object_new ( VIK_DEM_LAYER_TYPE, NULL ) );
369
370 vik_layer_init ( VIK_LAYER(vdl), VIK_LAYER_DEM );
371
372 vdl->files = NULL;
373
374
375 vdl->gc = NULL;
376
377 vdl->gcs = g_malloc(sizeof(GdkGC *)*DEM_N_COLORS);
378 /* make new gcs only if we need it (copy layer -> use old) */
379
380 vdl->min_elev = 0.0;
381 vdl->max_elev = 1000.0;
382 vdl->source = DEM_SOURCE_SRTM;
383 vdl->line_thickness = 3;
384 vdl->color = NULL;
385 return vdl;
386}
387
388
389
390static void vik_dem_layer_draw_dem ( VikDEMLayer *vdl, VikViewport *vp, VikDEM *dem )
391{
392 VikDEMColumn *column;
393
394 struct LatLon dem_northeast, dem_southwest;
395 gdouble max_lat, max_lon, min_lat, min_lon;
396
397 /**** Check if viewport and DEM data overlap ****/
398
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 );
401
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;
416
417 a_coords_utm_to_latlon(&dem_northeast_utm, &dem_northeast);
418 a_coords_utm_to_latlon(&dem_southwest_utm, &dem_southwest);
419 }
420
421 if ( (max_lat > dem_northeast.lat && min_lat > dem_northeast.lat) ||
422 (max_lat < dem_southwest.lat && min_lat < dem_southwest.lat) )
423 return;
424 else if ( (max_lon > dem_northeast.lon && min_lon > dem_northeast.lon) ||
425 (max_lon < dem_southwest.lon && min_lon < dem_southwest.lon) )
426 return;
427 /* else they overlap */
428
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.
433 */
434
435 #if 0
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?) */
439 {
440 VikCoord demne, demsw;
441 gint x1, y1, x2, y2;
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);
444
445 vik_viewport_coord_to_screen ( vp, &demne, &x1, &y1 );
446 vik_viewport_coord_to_screen ( vp, &demsw, &x2, &y2 );
447
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 );
454 return;
455 }
456 #endif
457
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 */
460
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;
463
464 gdouble start_lat, end_lat, start_lon, end_lon;
465
466 struct LatLon counter;
467
468 guint x, y, start_x, start_y;
469
470 gint16 elev;
471
472 guint skip_factor = ceil ( vik_viewport_get_xmpp(vp) / 40 ); /* todo: smarter calculation. */
473
474 gdouble nscale_deg = dem->north_scale / ((gdouble) 3600);
475 gdouble escale_deg = dem->east_scale / ((gdouble) 3600);
476
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;
481
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);
486
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;
491
492 vik_dem_east_north_to_xy ( dem, start_lon_as, start_lat_as, &start_x, &start_y );
493
494 /* verify sane elev interval */
495 if ( vdl->max_elev <= vdl->min_elev )
496 vdl->max_elev = vdl->min_elev + 1;
497
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 )
503 break;
504 elev = column->points[y];
505
506 if ( elev != VIK_DEM_INVALID_ELEVATION && elev < vdl->min_elev )
507 elev=vdl->min_elev;
508 if ( elev != VIK_DEM_INVALID_ELEVATION && elev > vdl->max_elev )
509 elev=vdl->max_elev;
510
511
512 {
513 gint a, b;
514
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 );
521 else
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 );
523 }
524 } /* for y= */
525 }
526 } /* for x= */
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;
530
531 gint16 elev;
532
533 guint x, y, start_x, start_y;
534
535 VikCoord tmp; /* TODO: don't use coord_load_from_latlon, especially if in latlon drawing mode */
536 struct UTM counter;
537
538 guint skip_factor = ceil ( vik_viewport_get_xmpp(vp) / 10 ); /* todo: smarter calculation. */
539
540 VikCoord tleft, tright, bleft, bright;
541
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 );
546
547
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);
552
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);
557
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);
564 else
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);
570 else
571 end_eas = dem->max_east;
572
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;
577
578 vik_dem_east_north_to_xy ( dem, start_eas, start_nor, &start_x, &start_y );
579
580 /* TODO: why start_x and start_y are -1 -- rounding error from above? */
581
582 counter.zone = dem->utm_zone;
583 counter.letter = dem->utm_letter;
584
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 )
590 continue;
591 elev = column->points[y];
592 if ( elev != VIK_DEM_INVALID_ELEVATION && elev < vdl->min_elev )
593 elev=vdl->min_elev;
594 if ( elev != VIK_DEM_INVALID_ELEVATION && elev > vdl->max_elev )
595 elev=vdl->max_elev;
596
597 {
598 gint a, b;
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 );
605 else
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 );
607 }
608 } /* for y= */
609 }
610 } /* for x= */
611 }
612}
613
614/* return the continent for the specified lat, lon */
615/* TODO */
616static const gchar *srtm_continent_dir ( gint lat, gint lon )
617{
618 extern const char *_srtm_continent_data[];
619 static GHashTable *srtm_continent = NULL;
620 const gchar *continent;
621 gchar name[16];
622
623 if (!srtm_continent) {
624 const gchar **s;
625
626 srtm_continent = g_hash_table_new(g_str_hash, g_str_equal);
627 s = _srtm_continent_data;
628 while (*s != (gchar *)-1) {
629 continent = *s++;
630 while (*s) {
631 g_hash_table_insert(srtm_continent, *s, continent);
632 s++;
633 }
634 s++;
635 }
636 }
637 g_snprintf(name, sizeof(name), "%c%02d%c%03d",
638 (lat >= 0) ? 'N' : 'S', ABS(lat),
639 (lon >= 0) ? 'E' : 'W', ABS(lon));
640
641 return(g_hash_table_lookup(srtm_continent, name));
642}
643
644void vik_dem_layer_draw ( VikDEMLayer *vdl, gpointer data )
645{
646 VikViewport *vp = (VikViewport *) data;
647 GList *dems_iter = vdl->files;
648 VikDEM *dem;
649
650
651 /* search for SRTM3 90m */
652
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 );
658#endif
659
660 while ( dems_iter ) {
661 dem = a_dems_get ( (const char *) (dems_iter->data) );
662 if ( dem )
663 vik_dem_layer_draw_dem ( vdl, vp, dem );
664 dems_iter = dems_iter->next;
665 }
666}
667
668void vik_dem_layer_free ( VikDEMLayer *vdl )
669{
670 gint i;
671 if ( vdl->gc != NULL )
672 g_object_unref ( G_OBJECT(vdl->gc) );
673
674 if ( vdl->color != NULL )
675 g_free ( vdl->color );
676
677 if ( vdl->gcs )
678 for ( i = 0; i < DEM_N_COLORS; i++ )
679 g_object_unref ( vdl->gcs[i] );
680 g_free ( vdl->gcs );
681
682 a_dems_list_free ( vdl->files );
683}
684
685static void dem_layer_update_gc ( VikDEMLayer *vdl, VikViewport *vp, const gchar *color )
686{
687 if ( vdl->color )
688 g_free ( vdl->color );
689
690 vdl->color = g_strdup ( color );
691
692 if ( vdl->gc )
693 g_object_unref ( G_OBJECT(vdl->gc) );
694
695 vdl->gc = vik_viewport_new_gc ( vp, vdl->color, vdl->line_thickness );
696}
697
698VikDEMLayer *vik_dem_layer_create ( VikViewport *vp )
699{
700 VikDEMLayer *vdl = vik_dem_layer_new ();
701 gint i;
702
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 );
706
707 dem_layer_update_gc ( vdl, vp, "red" );
708 return vdl;
709}
710/**************************************************************
711 **** SOURCES & DOWNLOADING
712 **************************************************************/
713typedef struct {
714 gchar *dest;
715 gdouble lat, lon;
716
717 GMutex *mutex;
718 VikDEMLayer *vdl; /* NULL if not alive */
719
720 guint source;
721} DEMDownloadParams;
722
723
724/**************************************************
725 * SOURCE: SRTM *
726 **************************************************/
727
728static void srtm_dem_download_thread ( DEMDownloadParams *p, gpointer threaddata )
729{
730 gint intlat, intlon;
731 const gchar *continent_dir;
732
733 intlat = (int)floor(p->lat);
734 intlon = (int)floor(p->lon);
735 continent_dir = srtm_continent_dir(intlat, intlon);
736
737 if (!continent_dir) {
738 g_warning("No SRTM data available for %f, %f\n", p->lat, p->lon);
739 return;
740 }
741
742 gchar *src_fn = g_strdup_printf("%s%s%s%c%02d%c%03d.hgt.zip",
743 SRTM_FTP_URI,
744 continent_dir,
745 G_DIR_SEPARATOR_S,
746 (intlat >= 0) ? 'N' : 'S',
747 ABS(intlat),
748 (intlon >= 0) ? 'E' : 'W',
749 ABS(intlon) );
750
751 DownloadOptions options = { NULL, 0 };
752 a_ftp_download_get_url ( SRTM_FTP_SITE, src_fn, p->dest, &options );
753 g_free ( src_fn );
754}
755
756static gchar *srtm_lat_lon_to_dest_fn ( gdouble lat, gdouble lon )
757{
758 gint intlat, intlon;
759 const gchar *continent_dir;
760
761 intlat = (int)floor(lat);
762 intlon = (int)floor(lon);
763 continent_dir = srtm_continent_dir(intlat, intlon);
764
765 if (!continent_dir)
766 continent_dir = "nowhere";
767
768 return g_strdup_printf("srtm3-%s%s%c%02d%c%03d.hgt.zip",
769 continent_dir,
770 G_DIR_SEPARATOR_S,
771 (intlat >= 0) ? 'N' : 'S',
772 ABS(intlat),
773 (intlon >= 0) ? 'E' : 'W',
774 ABS(intlon) );
775
776}
777
778/* TODO: generalize */
779static void srtm_draw_existence ( VikViewport *vp )
780{
781 gdouble max_lat, max_lon, min_lat, min_lon;
782 gchar buf[strlen(MAPS_CACHE_DIR)+strlen(SRTM_CACHE_TEMPLATE)+30];
783 gint i, j;
784
785 vik_viewport_get_min_max_lat_lon ( vp, &min_lat, &max_lat, &min_lon, &max_lon );
786
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)
791 continue;
792 g_snprintf(buf, sizeof(buf), SRTM_CACHE_TEMPLATE,
793 MAPS_CACHE_DIR,
794 continent_dir,
795 G_DIR_SEPARATOR_S,
796 (i >= 0) ? 'N' : 'S',
797 ABS(i),
798 (j >= 0) ? 'E' : 'W',
799 ABS(j) );
800 if ( access(buf, F_OK ) == 0 ) {
801 VikCoord ne, sw;
802 gint x1, y1, x2, y2;
803 sw.north_south = i;
804 sw.east_west = j;
805 sw.mode = VIK_COORD_LATLON;
806 ne.north_south = i+1;
807 ne.east_west = j+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 );
815 }
816 }
817 }
818}
819
820
821/**************************************************
822 * SOURCE: USGS 24K *
823 **************************************************/
824
825#ifdef VIK_CONFIG_DEM24K
826
827static void dem24k_dem_download_thread ( DEMDownloadParams *p, gpointer threaddata )
828{
829 /* TODO: dest dir */
830 gchar *cmdline = g_strdup_printf("%s %.03f %.03f",
831 DEM24K_DOWNLOAD_SCRIPT,
832 floor(p->lat*8)/8,
833 ceil(p->lon*8)/8 );
834 /* FIX: don't use system, use execv or something. check for existence */
835 system(cmdline);
836}
837
838static gchar *dem24k_lat_lon_to_dest_fn ( gdouble lat, gdouble lon )
839{
840 return g_strdup_printf("dem24k/%d/%d/%.03f,%.03f.dem",
841 (gint) lat,
842 (gint) lon,
843 floor(lat*8)/8,
844 ceil(lon*8)/8);
845}
846
847/* TODO: generalize */
848static void dem24k_draw_existence ( VikViewport *vp )
849{
850 gdouble max_lat, max_lon, min_lat, min_lon;
851 gchar buf[strlen(MAPS_CACHE_DIR)+40];
852 gdouble i, j;
853
854 vik_viewport_get_min_max_lat_lon ( vp, &min_lat, &max_lat, &min_lon, &max_lon );
855
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/",
859 MAPS_CACHE_DIR,
860 (gint) i );
861 if ( access(buf, F_OK) != 0 )
862 continue;
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/",
866 MAPS_CACHE_DIR,
867 (gint) i,
868 (gint) j );
869 if ( access(buf, F_OK) != 0 )
870 continue;
871 g_snprintf(buf, sizeof(buf), "%sdem24k/%d/%d/%.03f,%.03f.dem",
872 MAPS_CACHE_DIR,
873 (gint) i,
874 (gint) j,
875 floor(i*8)/8,
876 floor(j*8)/8 );
877 if ( access(buf, F_OK ) == 0 ) {
878 VikCoord ne, sw;
879 gint x1, y1, x2, y2;
880 sw.north_south = i;
881 sw.east_west = j-0.125;
882 sw.mode = VIK_COORD_LATLON;
883 ne.north_south = i+0.125;
884 ne.east_west = j;
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 );
892 }
893 }
894 }
895}
896#endif
897
898/**************************************************
899 * SOURCES -- DOWNLOADING & IMPORTING TOOL *
900 **************************************************
901 */
902
903static void weak_ref_cb ( gpointer ptr, GObject * dead_vdl )
904{
905 DEMDownloadParams *p = ptr;
906 g_mutex_lock ( p->mutex );
907 p->vdl = NULL;
908 g_mutex_unlock ( p->mutex );
909}
910
911/* Try to add file full_path.
912 * full_path will be copied.
913 * returns FALSE if file does not exists, TRUE otherwise.
914 */
915static gboolean dem_layer_add_file ( VikDEMLayer *vdl, const gchar *full_path )
916{
917 if ( access(full_path, F_OK ) == 0 ) {
918 /* only load if file size is not 0 (not in progress */
919 struct stat sb;
920 stat (full_path, &sb);
921 if ( sb.st_size ) {
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) );
927 }
928 return TRUE;
929 } else
930 return FALSE;
931}
932
933static void dem_download_thread ( DEMDownloadParams *p, gpointer threaddata )
934{
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 );
940#endif
941
942 gdk_threads_enter();
943 g_mutex_lock ( p->mutex );
944 if ( p->vdl ) {
945 g_object_weak_unref ( G_OBJECT(p->vdl), weak_ref_cb, p );
946
947 if ( dem_layer_add_file ( p->vdl, p->dest ) )
948 vik_layer_emit_update ( VIK_LAYER(p->vdl) );
949 }
950 g_mutex_unlock ( p->mutex );
951 gdk_threads_leave();
952}
953
954
955static void free_dem_download_params ( DEMDownloadParams *p )
956{
957 g_mutex_free ( p->mutex );
958 g_free ( p->dest );
959 g_free ( p );
960}
961
962static gpointer dem_layer_download_create ( VikWindow *vw, VikViewport *vvp)
963{
964 return vvp;
965}
966
967
968static gboolean dem_layer_download_release ( VikDEMLayer *vdl, GdkEventButton *event, VikViewport *vvp )
969{
970 VikCoord coord;
971 struct LatLon ll;
972
973 gchar *full_path;
974 gchar *dem_file = NULL;
975
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." );
978
979 vik_viewport_screen_to_coord ( vvp, event->x, event->y, &coord );
980 vik_coord_to_latlon ( &coord, &ll );
981
982
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 );
988#endif
989
990 if ( ! dem_file )
991 return TRUE;
992
993 full_path = g_strdup_printf("%s%s", MAPS_CACHE_DIR, dem_file );
994
995 g_warning(full_path);
996
997 // TODO: check if already in filelist
998
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);
1003 p->lat = ll.lat;
1004 p->lon = ll.lon;
1005 p->vdl = vdl;
1006 p->mutex = g_mutex_new();
1007 p->source = vdl->source;
1008 g_object_weak_ref(G_OBJECT(p->vdl), weak_ref_cb, p );
1009
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 );
1013 }
1014
1015 g_free ( dem_file );
1016 g_free ( full_path );
1017
1018 return TRUE;
1019}
1020
1021static gboolean dem_layer_download_click ( VikDEMLayer *vdl, GdkEventButton *event, VikViewport *vvp )
1022{
1023/* choose & keep track of cache dir
1024 * download in background thread
1025 * download over area */
1026 return TRUE;
1027}
1028
1029
Viking GPS editor