Pileus Git - aweather/blob - src/plugins/radar.c

   1 /*
   2  * Copyright (C) 2009-2011 Andy Spencer <andy753421@gmail.com>
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #define _XOPEN_SOURCE
  19 #include <time.h>
  20 #include <config.h>
  21 #include <glib/gstdio.h>
  22 #include <gtk/gtk.h>
  23 #include <gio/gio.h>
  24 #include <GL/gl.h>
  25 #include <math.h>
  26 #include <rsl.h>
  27
  28 #include <grits.h>
  29
  30 #include "radar.h"
  31 #include "level2.h"
  32 #include "../aweather-location.h"
  33
  34 static void _gtk_bin_set_child(GtkBin *bin, GtkWidget *new)
  35 {
  36         GtkWidget *old = gtk_bin_get_child(bin);
  37         if (old)
  38                 gtk_widget_destroy(old);
  39         gtk_container_add(GTK_CONTAINER(bin), new);
  40         gtk_widget_show_all(new);
  41 }
  42
  43 static gchar *_find_nearest(time_t time, GList *files,
  44                 gsize offset)
  45 {
  46         g_debug("RadarSite: find_nearest ...");
  47         time_t  nearest_time = 0;
  48         char   *nearest_file = NULL;
  49
  50         struct tm tm = {};
  51         for (GList *cur = files; cur; cur = cur->next) {
  52                 gchar *file = cur->data;
  53                 sscanf(file+offset, "%4d%2d%2d_%2d%2d",
  54                                 &tm.tm_year, &tm.tm_mon, &tm.tm_mday,
  55                                 &tm.tm_hour, &tm.tm_min);
  56                 tm.tm_year -= 1900;
  57                 tm.tm_mon  -= 1;
  58                 if (ABS(time - mktime(&tm)) <
  59                     ABS(time - nearest_time)) {
  60                         nearest_file = file;
  61                         nearest_time = mktime(&tm);
  62                 }
  63         }
  64
  65         g_debug("RadarSite: find_nearest = %s", nearest_file);
  66         if (nearest_file)
  67                 return g_strdup(nearest_file);
  68         else
  69                 return NULL;
  70 }
  71
  72
  73 /**************
  74  * RadarSites *
  75  **************/
  76 typedef enum {
  77         STATUS_UNLOADED,
  78         STATUS_LOADING,
  79         STATUS_LOADED,
  80 } RadarSiteStatus;
  81 struct _RadarSite {
  82         /* Information */
  83         city_t         *city;
  84         GritsMarker    *marker;      // Map marker for grits
  85
  86         /* Stuff from the parents */
  87         GritsViewer    *viewer;
  88         GritsHttp      *http;
  89         GritsPrefs     *prefs;
  90         GtkWidget      *pconfig;
  91
  92         /* When loaded */
  93         gboolean        hidden;
  94         RadarSiteStatus status;      // Loading status for the site
  95         GtkWidget      *config;
  96         AWeatherLevel2 *level2;      // The Level2 structure for the current volume
  97
  98         /* Internal data */
  99         time_t          time;        // Current timestamp of the level2
 100         gchar          *message;     // Error message set while updating
 101         guint           time_id;     // "time-changed"     callback ID
 102         guint           refresh_id;  // "refresh"          callback ID
 103         guint           location_id; // "locaiton-changed" callback ID
 104 };
 105
 106 /* format: http://mesonet.agron.iastate.edu/data/nexrd2/raw/KABR/KABR_20090510_0323 */
 107 void _site_update_loading(gchar *file, goffset cur,
 108                 goffset total, gpointer _site)
 109 {
 110         RadarSite *site = _site;
 111         GtkWidget *progress_bar = gtk_bin_get_child(GTK_BIN(site->config));
 112         double percent = (double)cur/total;
 113         gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(progress_bar), MIN(percent, 1.0));
 114         gchar *msg = g_strdup_printf("Loading... %5.1f%% (%.2f/%.2f MB)",
 115                         percent*100, (double)cur/1000000, (double)total/1000000);
 116         gtk_progress_bar_set_text(GTK_PROGRESS_BAR(progress_bar), msg);
 117         g_free(msg);
 118 }
 119 gboolean _site_update_end(gpointer _site)
 120 {
 121         RadarSite *site = _site;
 122         if (site->message) {
 123                 g_warning("RadarSite: update_end - %s", site->message);
 124                 _gtk_bin_set_child(GTK_BIN(site->config),
 125                                 gtk_label_new(site->message));
 126         } else {
 127                 _gtk_bin_set_child(GTK_BIN(site->config),
 128                                 aweather_level2_get_config(site->level2));
 129         }
 130         site->status = STATUS_LOADED;
 131         return FALSE;
 132 }
 133 gpointer _site_update_thread(gpointer _site)
 134 {
 135         RadarSite *site = _site;
 136         g_debug("RadarSite: update_thread - %s", site->city->code);
 137         site->message = NULL;
 138
 139         gboolean offline = grits_viewer_get_offline(site->viewer);
 140         gchar *nexrad_url = grits_prefs_get_string(site->prefs,
 141                         "aweather/nexrad_url", NULL);
 142
 143         /* Find nearest volume (temporally) */
 144         g_debug("RadarSite: update_thread - find nearest - %s", site->city->code);
 145         gchar *dir_list = g_strconcat(nexrad_url, "/", site->city->code,
 146                         "/", "dir.list", NULL);
 147         GList *files = grits_http_available(site->http,
 148                         "^\\w{4}_\\d{8}_\\d{4}$", site->city->code,
 149                         "\\d+ (.*)", (offline ? NULL : dir_list));
 150         g_free(dir_list);
 151         gchar *nearest = _find_nearest(site->time, files, 5);
 152         g_list_foreach(files, (GFunc)g_free, NULL);
 153         g_list_free(files);
 154         if (!nearest) {
 155                 site->message = "No suitable files found";
 156                 goto out;
 157         }
 158
 159         /* Fetch new volume */
 160         g_debug("RadarSite: update_thread - fetch");
 161         gchar *local = g_strconcat(site->city->code, "/", nearest, NULL);
 162         gchar *uri   = g_strconcat(nexrad_url, "/", local,   NULL);
 163         gchar *file  = grits_http_fetch(site->http, uri, local,
 164                         offline ? GRITS_LOCAL : GRITS_UPDATE,
 165                         _site_update_loading, site);
 166         g_free(nexrad_url);
 167         g_free(nearest);
 168         g_free(local);
 169         g_free(uri);
 170         if (!file) {
 171                 site->message = "Fetch failed";
 172                 goto out;
 173         }
 174
 175         /* Load and add new volume */
 176         g_debug("RadarSite: update_thread - load - %s", site->city->code);
 177         site->level2 = aweather_level2_new_from_file(
 178                         file, site->city->code, colormaps);
 179         g_free(file);
 180         if (!site->level2) {
 181                 site->message = "Load failed";
 182                 goto out;
 183         }
 184         grits_object_hide(GRITS_OBJECT(site->level2), site->hidden);
 185         grits_viewer_add(site->viewer, GRITS_OBJECT(site->level2),
 186                         GRITS_LEVEL_WORLD+1, TRUE);
 187
 188 out:
 189         g_idle_add(_site_update_end, site);
 190         return NULL;
 191 }
 192 void _site_update(RadarSite *site)
 193 {
 194         if (site->status == STATUS_LOADING)
 195                 return;
 196         site->status = STATUS_LOADING;
 197
 198         site->time = grits_viewer_get_time(site->viewer);
 199         g_debug("RadarSite: update %s - %d",
 200                         site->city->code, (gint)site->time);
 201
 202         /* Add a progress bar */
 203         GtkWidget *progress = gtk_progress_bar_new();
 204         gtk_progress_bar_set_text(GTK_PROGRESS_BAR(progress), "Loading...");
 205         _gtk_bin_set_child(GTK_BIN(site->config), progress);
 206
 207         /* Remove old volume */
 208         g_debug("RadarSite: update - remove - %s", site->city->code);
 209         if (site->level2) {
 210                 grits_viewer_remove(site->viewer, GRITS_OBJECT(site->level2));
 211                 site->level2 = NULL;
 212         }
 213
 214         /* Fork loading right away so updating the
 215          * list of times doesn't take too long */
 216         g_thread_create(_site_update_thread, site, FALSE, NULL);
 217 }
 218
 219 /* RadarSite methods */
 220 void radar_site_unload(RadarSite *site)
 221 {
 222         if (site->status != STATUS_LOADED)
 223                 return; // Abort if it's still loading
 224
 225         g_debug("RadarSite: unload %s", site->city->code);
 226
 227         if (site->time_id)
 228                 g_signal_handler_disconnect(site->viewer, site->time_id);
 229         if (site->refresh_id)
 230                 g_signal_handler_disconnect(site->viewer, site->refresh_id);
 231
 232         /* Remove tab */
 233         if (site->config)
 234                 gtk_widget_destroy(site->config);
 235
 236         /* Remove radar */
 237         if (site->level2) {
 238                 grits_viewer_remove(site->viewer, GRITS_OBJECT(site->level2));
 239                 site->level2 = NULL;
 240         }
 241
 242         site->status = STATUS_UNLOADED;
 243 }
 244
 245 void radar_site_load(RadarSite *site)
 246 {
 247         g_debug("RadarSite: load %s", site->city->code);
 248
 249         /* Add tab page */
 250         site->config = gtk_alignment_new(0, 0, 1, 1);
 251         g_object_set_data(G_OBJECT(site->config), "site", site);
 252         gtk_notebook_append_page(GTK_NOTEBOOK(site->pconfig), site->config,
 253                         gtk_label_new(site->city->name));
 254         gtk_widget_show_all(site->config);
 255         if (gtk_notebook_get_current_page(GTK_NOTEBOOK(site->pconfig)) == 0)
 256                 gtk_notebook_set_current_page(GTK_NOTEBOOK(site->pconfig), -1);
 257
 258         /* Set up radar loading */
 259         site->time_id = g_signal_connect_swapped(site->viewer, "time-changed",
 260                         G_CALLBACK(_site_update), site);
 261         site->refresh_id = g_signal_connect_swapped(site->viewer, "refresh",
 262                         G_CALLBACK(_site_update), site);
 263         _site_update(site);
 264 }
 265
 266 void _site_on_location_changed(GritsViewer *viewer,
 267                 gdouble lat, gdouble lon, gdouble elev,
 268                 gpointer _site)
 269 {
 270         static gdouble min_dist = EARTH_R / 30;
 271         RadarSite *site = _site;
 272
 273         /* Calculate distance, could cache xyz values */
 274         gdouble eye_xyz[3], site_xyz[3];
 275         lle2xyz(lat, lon, elev, &eye_xyz[0], &eye_xyz[1], &eye_xyz[2]);
 276         lle2xyz(site->city->pos.lat, site->city->pos.lon, site->city->pos.elev,
 277                         &site_xyz[0], &site_xyz[1], &site_xyz[2]);
 278         gdouble dist = distd(site_xyz, eye_xyz);
 279
 280         /* Load or unload the site if necessasairy */
 281         if (dist <= min_dist && dist < elev*1.25 && site->status == STATUS_UNLOADED)
 282                 radar_site_load(site);
 283         else if (dist > 2*min_dist &&  site->status != STATUS_UNLOADED)
 284                 radar_site_unload(site);
 285 }
 286
 287 gboolean _site_add_marker(gpointer _site)
 288 {
 289         RadarSite *site = _site;
 290         site->marker = grits_marker_new(site->city->name);
 291         GRITS_OBJECT(site->marker)->center = site->city->pos;
 292         GRITS_OBJECT(site->marker)->lod    = EARTH_R*site->city->lod;
 293         grits_viewer_add(site->viewer, GRITS_OBJECT(site->marker),
 294                         GRITS_LEVEL_OVERLAY, FALSE);
 295         return FALSE;
 296 }
 297 RadarSite *radar_site_new(city_t *city, GtkWidget *pconfig,
 298                 GritsViewer *viewer, GritsPrefs *prefs, GritsHttp *http)
 299 {
 300         RadarSite *site = g_new0(RadarSite, 1);
 301         site->viewer  = g_object_ref(viewer);
 302         site->prefs   = g_object_ref(prefs);
 303         //site->http    = http;
 304         site->http    = grits_http_new(G_DIR_SEPARATOR_S
 305                         "nexrad" G_DIR_SEPARATOR_S
 306                         "level2" G_DIR_SEPARATOR_S);
 307         site->city    = city;
 308         site->pconfig = pconfig;
 309
 310         /* Set initial location */
 311         gdouble lat, lon, elev;
 312         grits_viewer_get_location(viewer, &lat, &lon, &elev);
 313         _site_on_location_changed(viewer, lat, lon, elev, site);
 314
 315         /* Add marker */
 316         g_idle_add_full(G_PRIORITY_LOW, _site_add_marker, site, NULL);
 317
 318         /* Connect signals */
 319         site->location_id  = g_signal_connect(viewer, "location-changed",
 320                         G_CALLBACK(_site_on_location_changed), site);
 321         return site;
 322 }
 323
 324 void radar_site_free(RadarSite *site)
 325 {
 326         radar_site_unload(site);
 327         grits_viewer_remove(site->viewer, GRITS_OBJECT(site->marker));
 328         if (site->location_id)
 329                 g_signal_handler_disconnect(site->viewer, site->location_id);
 330         grits_http_free(site->http);
 331         g_object_unref(site->viewer);
 332         g_object_unref(site->prefs);
 333         g_free(site);
 334 }
 335
 336
 337 /**************
 338  * RadarConus *
 339  **************/
 340 #define CONUS_NORTH       50.406626367301044
 341 #define CONUS_WEST       -127.620375523875420
 342 #define CONUS_WIDTH       3400.0
 343 #define CONUS_HEIGHT      1600.0
 344 #define CONUS_DEG_PER_PX  0.017971305190311
 345
 346 struct _RadarConus {
 347         GritsViewer *viewer;
 348         GritsHttp   *http;
 349         GtkWidget   *config;
 350         time_t       time;
 351         const gchar *message;
 352         GStaticMutex loading;
 353
 354         gchar       *path;
 355         GritsTile   *tile[2];
 356
 357         guint        time_id;     // "time-changed"     callback ID
 358         guint        refresh_id;  // "refresh"          callback ID
 359 };
 360
 361 void _conus_update_loading(gchar *file, goffset cur,
 362                 goffset total, gpointer _conus)
 363 {
 364         RadarConus *conus = _conus;
 365         GtkWidget *progress_bar = gtk_bin_get_child(GTK_BIN(conus->config));
 366         double percent = (double)cur/total;
 367         gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(progress_bar), MIN(percent, 1.0));
 368         gchar *msg = g_strdup_printf("Loading... %5.1f%% (%.2f/%.2f MB)",
 369                         percent*100, (double)cur/1000000, (double)total/1000000);
 370         gtk_progress_bar_set_text(GTK_PROGRESS_BAR(progress_bar), msg);
 371         g_free(msg);
 372 }
 373
 374 /* Copy images to graphics memory */
 375 static void _conus_update_end_copy(GritsTile *tile, guchar *pixels)
 376 {
 377         if (!tile->data) {
 378                 tile->data = g_new0(guint, 1);
 379                 glGenTextures(1, tile->data);
 380         }
 381
 382         guint *tex = tile->data;
 383         glBindTexture(GL_TEXTURE_2D, *tex);
 384
 385         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 386         glPixelStorei(GL_PACK_ALIGNMENT, 1);
 387         glTexImage2D(GL_TEXTURE_2D, 0, 4, 2048, 2048, 0,
 388                         GL_RGBA, GL_UNSIGNED_BYTE, NULL);
 389         glTexSubImage2D(GL_TEXTURE_2D, 0, 1,1, CONUS_WIDTH/2,CONUS_HEIGHT,
 390                         GL_RGBA, GL_UNSIGNED_BYTE, pixels);
 391         tile->coords.n = 1.0/(CONUS_WIDTH/2);
 392         tile->coords.w = 1.0/ CONUS_HEIGHT;
 393         tile->coords.s = tile->coords.n +  CONUS_HEIGHT   / 2048.0;
 394         tile->coords.e = tile->coords.w + (CONUS_WIDTH/2) / 2048.0;
 395         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 396         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 397         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
 398         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
 399         glFlush();
 400 }
 401
 402 /* Split the pixbuf into east and west halves (with 2K sides)
 403  * Also map the pixbuf's alpha values */
 404 static void _conus_update_end_split(guchar *pixels, guchar *west, guchar *east,
 405                 gint width, gint height, gint pxsize)
 406 {
 407         g_debug("Conus: update_end_split");
 408         guchar *out[] = {west,east};
 409         const guchar alphamap[][4] = {
 410                 {0x04, 0xe9, 0xe7, 0x30},
 411                 {0x01, 0x9f, 0xf4, 0x60},
 412                 {0x03, 0x00, 0xf4, 0x90},
 413         };
 414         for (int y = 0; y < height; y++)
 415         for (int x = 0; x < width;  x++) {
 416                 gint subx = x % (width/2);
 417                 gint idx  = x / (width/2);
 418                 guchar *src = &pixels[(y*width+x)*pxsize];
 419                 guchar *dst = &out[idx][(y*(width/2)+subx)*4];
 420                 if (src[0] > 0xe0 &&
 421                     src[1] > 0xe0 &&
 422                     src[2] > 0xe0) {
 423                         dst[3] = 0x00;
 424                 } else {
 425                         dst[0] = src[0];
 426                         dst[1] = src[1];
 427                         dst[2] = src[2];
 428                         dst[3] = 0xff;
 429                         for (int j = 0; j < G_N_ELEMENTS(alphamap); j++)
 430                                 if (src[0] == alphamap[j][0] &&
 431                                     src[1] == alphamap[j][1] &&
 432                                     src[2] == alphamap[j][2])
 433                                         dst[3] = alphamap[j][3];
 434                 }
 435         }
 436 }
 437
 438 gboolean _conus_update_end(gpointer _conus)
 439 {
 440         RadarConus *conus = _conus;
 441         g_debug("Conus: update_end");
 442
 443         /* Check error status */
 444         if (conus->message) {
 445                 g_warning("Conus: update_end - %s", conus->message);
 446                 _gtk_bin_set_child(GTK_BIN(conus->config), gtk_label_new(conus->message));
 447                 goto out;
 448         }
 449
 450         /* Load and pixbuf */
 451         GError *error = NULL;
 452         GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(conus->path, &error);
 453         if (!pixbuf || error) {
 454                 g_warning("Conus: update_end - error loading pixbuf: %s", conus->path);
 455                 _gtk_bin_set_child(GTK_BIN(conus->config), gtk_label_new("Error loading pixbuf"));
 456                 g_remove(conus->path);
 457                 goto out;
 458         }
 459
 460         /* Split pixels into east/west parts */
 461         guchar *pixels = gdk_pixbuf_get_pixels(pixbuf);
 462         gint    width  = gdk_pixbuf_get_width(pixbuf);
 463         gint    height = gdk_pixbuf_get_height(pixbuf);
 464         gint    pxsize = gdk_pixbuf_get_has_alpha(pixbuf) ? 4 : 3;
 465         guchar *pixels_west = g_malloc(4*(width/2)*height);
 466         guchar *pixels_east = g_malloc(4*(width/2)*height);
 467         _conus_update_end_split(pixels, pixels_west, pixels_east,
 468                         width, height, pxsize);
 469         g_object_unref(pixbuf);
 470
 471         /* Copy pixels to graphics memory */
 472         _conus_update_end_copy(conus->tile[0], pixels_west);
 473         _conus_update_end_copy(conus->tile[1], pixels_east);
 474         g_free(pixels_west);
 475         g_free(pixels_east);
 476
 477         /* Update GUI */
 478         gchar *label = g_path_get_basename(conus->path);
 479         _gtk_bin_set_child(GTK_BIN(conus->config), gtk_label_new(label));
 480         gtk_widget_queue_draw(GTK_WIDGET(conus->viewer));
 481         g_free(label);
 482
 483 out:
 484         g_free(conus->path);
 485         g_static_mutex_unlock(&conus->loading);
 486         return FALSE;
 487 }
 488
 489 gpointer _conus_update_thread(gpointer _conus)
 490 {
 491         RadarConus *conus = _conus;
 492         conus->message = NULL;
 493
 494         /* Find nearest */
 495         g_debug("Conus: update_thread - nearest");
 496         gboolean offline = grits_viewer_get_offline(conus->viewer);
 497         gchar *conus_url = "http://radar.weather.gov/Conus/RadarImg/";
 498         gchar *nearest;
 499         if (time(NULL) - conus->time < 60*60*5 && !offline) {
 500                 /* radar.weather.gov is full of lies.
 501                  * the index pages get cached and out of date */
 502                 /* gmtime is not thread safe, but it's not used very often so
 503                  * hopefully it'll be alright for now... :-( */
 504                 struct tm *tm = gmtime(&conus->time);
 505                 time_t onthe8 = conus->time - 60*((tm->tm_min+1)%10+1);
 506                 tm = gmtime(&onthe8);
 507                 nearest = g_strdup_printf("Conus_%04d%02d%02d_%02d%02d_N0Ronly.gif",
 508                                 tm->tm_year+1900, tm->tm_mon+1, tm->tm_mday,
 509                                 tm->tm_hour, tm->tm_min);
 510         } else {
 511                 GList *files = grits_http_available(conus->http,
 512                                 "^Conus_[^\"]*_N0Ronly.gif$", "", NULL, NULL);
 513                 nearest = _find_nearest(conus->time, files, 6);
 514                 g_list_foreach(files, (GFunc)g_free, NULL);
 515                 g_list_free(files);
 516                 if (!nearest) {
 517                         conus->message = "No suitable files";
 518                         goto out;
 519                 }
 520         }
 521
 522         /* Fetch the image */
 523         g_debug("Conus: update_thread - fetch");
 524         gchar *uri  = g_strconcat(conus_url, nearest, NULL);
 525         conus->path = grits_http_fetch(conus->http, uri, nearest,
 526                         offline ? GRITS_LOCAL : GRITS_ONCE,
 527                         _conus_update_loading, conus);
 528         g_free(nearest);
 529         g_free(uri);
 530         if (!conus->path) {
 531                 conus->message = "Fetch failed";
 532                 goto out;
 533         }
 534
 535 out:
 536         g_debug("Conus: update_thread - done");
 537         g_idle_add(_conus_update_end, conus);
 538         return NULL;
 539 }
 540
 541 void _conus_update(RadarConus *conus)
 542 {
 543         if (!g_static_mutex_trylock(&conus->loading))
 544                 return;
 545         conus->time = grits_viewer_get_time(conus->viewer);
 546         g_debug("Conus: update - %d",
 547                         (gint)conus->time);
 548
 549         /* Add a progress bar */
 550         GtkWidget *progress = gtk_progress_bar_new();
 551         gtk_progress_bar_set_text(GTK_PROGRESS_BAR(progress), "Loading...");
 552         _gtk_bin_set_child(GTK_BIN(conus->config), progress);
 553
 554         g_thread_create(_conus_update_thread, conus, FALSE, NULL);
 555 }
 556
 557 RadarConus *radar_conus_new(GtkWidget *pconfig,
 558                 GritsViewer *viewer, GritsHttp *http)
 559 {
 560         RadarConus *conus = g_new0(RadarConus, 1);
 561         conus->viewer  = g_object_ref(viewer);
 562         conus->http    = http;
 563         conus->config  = gtk_alignment_new(0, 0, 1, 1);
 564         g_static_mutex_init(&conus->loading);
 565
 566         gdouble south =  CONUS_NORTH - CONUS_DEG_PER_PX*CONUS_HEIGHT;
 567         gdouble east  =  CONUS_WEST  + CONUS_DEG_PER_PX*CONUS_WIDTH;
 568         gdouble mid   =  CONUS_WEST  + CONUS_DEG_PER_PX*CONUS_WIDTH/2;
 569         conus->tile[0] = grits_tile_new(NULL, CONUS_NORTH, south, mid, CONUS_WEST);
 570         conus->tile[1] = grits_tile_new(NULL, CONUS_NORTH, south, east, mid);
 571         conus->tile[0]->zindex = 2;
 572         conus->tile[1]->zindex = 1;
 573         grits_viewer_add(viewer, GRITS_OBJECT(conus->tile[0]), GRITS_LEVEL_WORLD, TRUE);
 574         grits_viewer_add(viewer, GRITS_OBJECT(conus->tile[1]), GRITS_LEVEL_WORLD, TRUE);
 575
 576         conus->time_id = g_signal_connect_swapped(viewer, "time-changed",
 577                         G_CALLBACK(_conus_update), conus);
 578         conus->refresh_id = g_signal_connect_swapped(viewer, "refresh",
 579                         G_CALLBACK(_conus_update), conus);
 580
 581         g_object_set_data(G_OBJECT(conus->config), "conus", conus);
 582         gtk_notebook_append_page(GTK_NOTEBOOK(pconfig), conus->config,
 583                         gtk_label_new("Conus"));
 584
 585         _conus_update(conus);
 586         return conus;
 587 }
 588
 589 void radar_conus_free(RadarConus *conus)
 590 {
 591         g_signal_handler_disconnect(conus->viewer, conus->time_id);
 592         g_signal_handler_disconnect(conus->viewer, conus->refresh_id);
 593
 594         for (int i = 0; i < 2; i++) {
 595                 GritsTile *tile = conus->tile[i];
 596                 if (tile->data) {
 597                         glDeleteTextures(1, tile->data);
 598                         g_free(tile->data);
 599                 }
 600                 grits_viewer_remove(conus->viewer, GRITS_OBJECT(tile));
 601         }
 602
 603         g_object_unref(conus->viewer);
 604         g_free(conus);
 605 }
 606
 607
 608 /********************
 609  * GritsPluginRadar *
 610  ********************/
 611 static void _draw_hud(GritsCallback *callback, GritsOpenGL *opengl, gpointer _self)
 612 {
 613         g_debug("GritsPluginRadar: _draw_hud");
 614         /* Setup OpenGL */
 615         glMatrixMode(GL_MODELVIEW ); glLoadIdentity();
 616         glMatrixMode(GL_PROJECTION); glLoadIdentity();
 617         glDisable(GL_TEXTURE_2D);
 618         glDisable(GL_ALPHA_TEST);
 619         glDisable(GL_CULL_FACE);
 620         glDisable(GL_LIGHTING);
 621         glEnable(GL_COLOR_MATERIAL);
 622
 623         GHashTableIter iter;
 624         gpointer name, _site;
 625         GritsPluginRadar *self = GRITS_PLUGIN_RADAR(_self);
 626         g_hash_table_iter_init(&iter, self->sites);
 627         while (g_hash_table_iter_next(&iter, &name, &_site)) {
 628                 /* Pick correct colormaps */
 629                 RadarSite *site = _site;
 630                 if (site->hidden || !site->level2)
 631                         continue;
 632                 AWeatherColormap *colormap = site->level2->sweep_colors;
 633
 634                 /* Print the color table */
 635                 glBegin(GL_QUADS);
 636                 int len = colormap->len;
 637                 for (int i = 0; i < len; i++) {
 638                         glColor4ubv(colormap->data[i]);
 639                         glVertex3f(-1.0, (float)((i  ) - len/2)/(len/2), 0.0); // bot left
 640                         glVertex3f(-1.0, (float)((i+1) - len/2)/(len/2), 0.0); // top left
 641                         glVertex3f(-0.9, (float)((i+1) - len/2)/(len/2), 0.0); // top right
 642                         glVertex3f(-0.9, (float)((i  ) - len/2)/(len/2), 0.0); // bot right
 643                 }
 644                 glEnd();
 645         }
 646 }
 647
 648 static void _load_colormap(gchar *filename, AWeatherColormap *cm)
 649 {
 650         g_debug("GritsPluginRadar: _load_colormap - %s", filename);
 651         FILE *file = fopen(filename, "r");
 652         if (!file)
 653                 g_error("GritsPluginRadar: open failed");
 654         guint8 color[4];
 655         GArray *array = g_array_sized_new(FALSE, TRUE, sizeof(color), 256);
 656         if (!fgets(cm->name, sizeof(cm->name), file)) goto out;
 657         if (!fscanf(file, "%f\n", &cm->scale))        goto out;
 658         if (!fscanf(file, "%f\n", &cm->shift))        goto out;
 659         int r, g, b, a;
 660         while (fscanf(file, "%d %d %d %d\n", &r, &g, &b, &a) == 4) {
 661                 color[0] = r;
 662                 color[1] = g;
 663                 color[2] = b;
 664                 color[3] = a;
 665                 g_array_append_val(array, color);
 666         }
 667         cm->len  = (gint )array->len;
 668         cm->data = (void*)array->data;
 669 out:
 670         g_array_free(array, FALSE);
 671         fclose(file);
 672 }
 673
 674 static void _update_hidden(GtkNotebook *notebook,
 675                 GtkNotebookPage *page, guint page_num, gpointer viewer)
 676 {
 677         g_debug("GritsPluginRadar: _update_hidden - 0..%d = %d",
 678                         gtk_notebook_get_n_pages(notebook), page_num);
 679
 680         for (gint i = 0; i < gtk_notebook_get_n_pages(notebook); i++) {
 681                 gboolean is_hidden = (i != page_num);
 682                 GtkWidget  *config = gtk_notebook_get_nth_page(notebook, i);
 683                 RadarConus *conus  = g_object_get_data(G_OBJECT(config), "conus");
 684                 RadarSite  *site   = g_object_get_data(G_OBJECT(config), "site");
 685
 686                 /* Conus */
 687                 if (conus) {
 688                         grits_object_hide(GRITS_OBJECT(conus->tile[0]), is_hidden);
 689                         grits_object_hide(GRITS_OBJECT(conus->tile[1]), is_hidden);
 690                 } else if (site) {
 691                         site->hidden = is_hidden;
 692                         if (site->level2)
 693                                 grits_object_hide(GRITS_OBJECT(site->level2), is_hidden);
 694                 } else {
 695                         g_warning("GritsPluginRadar: _update_hidden - no site or counus found");
 696                 }
 697         }
 698         gtk_widget_queue_draw(GTK_WIDGET(viewer));
 699 }
 700
 701 /* Methods */
 702 GritsPluginRadar *grits_plugin_radar_new(GritsViewer *viewer, GritsPrefs *prefs)
 703 {
 704         /* TODO: move to constructor if possible */
 705         g_debug("GritsPluginRadar: new");
 706         GritsPluginRadar *self = g_object_new(GRITS_TYPE_PLUGIN_RADAR, NULL);
 707         self->viewer = viewer;
 708         self->prefs  = prefs;
 709
 710         /* Setup page switching */
 711         self->tab_id = g_signal_connect(self->config, "switch-page",
 712                         G_CALLBACK(_update_hidden), viewer);
 713
 714         /* Load HUD */
 715         self->hud = grits_callback_new(_draw_hud, self);
 716         grits_viewer_add(viewer, GRITS_OBJECT(self->hud), GRITS_LEVEL_HUD, FALSE);
 717
 718         /* Load Conus */
 719         self->conus = radar_conus_new(self->config, self->viewer, self->conus_http);
 720
 721         /* Load radar sites */
 722         for (city_t *city = cities; city->type; city++) {
 723                 if (city->type != LOCATION_CITY)
 724                         continue;
 725                 RadarSite *site = radar_site_new(city, self->config,
 726                                 self->viewer, self->prefs, self->sites_http);
 727                 g_hash_table_insert(self->sites, city->code, site);
 728         }
 729
 730         return self;
 731 }
 732
 733 static GtkWidget *grits_plugin_radar_get_config(GritsPlugin *_self)
 734 {
 735         GritsPluginRadar *self = GRITS_PLUGIN_RADAR(_self);
 736         return self->config;
 737 }
 738
 739 /* GObject code */
 740 static void grits_plugin_radar_plugin_init(GritsPluginInterface *iface);
 741 G_DEFINE_TYPE_WITH_CODE(GritsPluginRadar, grits_plugin_radar, G_TYPE_OBJECT,
 742                 G_IMPLEMENT_INTERFACE(GRITS_TYPE_PLUGIN,
 743                         grits_plugin_radar_plugin_init));
 744 static void grits_plugin_radar_plugin_init(GritsPluginInterface *iface)
 745 {
 746         g_debug("GritsPluginRadar: plugin_init");
 747         /* Add methods to the interface */
 748         iface->get_config = grits_plugin_radar_get_config;
 749 }
 750 static void grits_plugin_radar_init(GritsPluginRadar *self)
 751 {
 752         g_debug("GritsPluginRadar: class_init");
 753         /* Set defaults */
 754         self->sites_http = grits_http_new(G_DIR_SEPARATOR_S
 755                         "nexrad" G_DIR_SEPARATOR_S
 756                         "level2" G_DIR_SEPARATOR_S);
 757         self->conus_http = grits_http_new(G_DIR_SEPARATOR_S
 758                         "nexrad" G_DIR_SEPARATOR_S
 759                         "conus"  G_DIR_SEPARATOR_S);
 760         self->sites      = g_hash_table_new_full(g_str_hash, g_str_equal,
 761                                 NULL, (GDestroyNotify)radar_site_free);
 762         self->config     = gtk_notebook_new();
 763
 764         /* Load colormaps */
 765         for (int i = 0; colormaps[i].file; i++) {
 766                 gchar *file = g_build_filename(PKGDATADIR,
 767                                 "colors", colormaps[i].file, NULL);
 768                 _load_colormap(file, &colormaps[i]);
 769                 g_free(file);
 770         }
 771
 772         /* Need to position on the top because of Win32 bug */
 773         gtk_notebook_set_tab_pos(GTK_NOTEBOOK(self->config), GTK_POS_LEFT);
 774 }
 775 static void grits_plugin_radar_dispose(GObject *gobject)
 776 {
 777         g_debug("GritsPluginRadar: dispose");
 778         GritsPluginRadar *self = GRITS_PLUGIN_RADAR(gobject);
 779         g_signal_handler_disconnect(self->config, self->tab_id);
 780         grits_viewer_remove(self->viewer, GRITS_OBJECT(self->hud));
 781         radar_conus_free(self->conus);
 782         /* Drop references */
 783         G_OBJECT_CLASS(grits_plugin_radar_parent_class)->dispose(gobject);
 784 }
 785 static void grits_plugin_radar_finalize(GObject *gobject)
 786 {
 787         g_debug("GritsPluginRadar: finalize");
 788         GritsPluginRadar *self = GRITS_PLUGIN_RADAR(gobject);
 789         /* Free data */
 790         grits_http_free(self->conus_http);
 791         grits_http_free(self->sites_http);
 792         g_hash_table_destroy(self->sites);
 793         gtk_widget_destroy(self->config);
 794         G_OBJECT_CLASS(grits_plugin_radar_parent_class)->finalize(gobject);
 795
 796 }
 797 static void grits_plugin_radar_class_init(GritsPluginRadarClass *klass)
 798 {
 799         g_debug("GritsPluginRadar: class_init");
 800         GObjectClass *gobject_class = (GObjectClass*)klass;
 801         gobject_class->dispose  = grits_plugin_radar_dispose;
 802         gobject_class->finalize = grits_plugin_radar_finalize;
 803 }