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
 256         /* Set up radar loading */
 257         site->time_id = g_signal_connect_swapped(site->viewer, "time-changed",
 258                         G_CALLBACK(_site_update), site);
 259         site->refresh_id = g_signal_connect_swapped(site->viewer, "refresh",
 260                         G_CALLBACK(_site_update), site);
 261         _site_update(site);
 262 }
 263
 264 void _site_on_location_changed(GritsViewer *viewer,
 265                 gdouble lat, gdouble lon, gdouble elev,
 266                 gpointer _site)
 267 {
 268         static gdouble min_dist = EARTH_R / 30;
 269         RadarSite *site = _site;
 270
 271         /* Calculate distance, could cache xyz values */
 272         gdouble eye_xyz[3], site_xyz[3];
 273         lle2xyz(lat, lon, elev, &eye_xyz[0], &eye_xyz[1], &eye_xyz[2]);
 274         lle2xyz(site->city->pos.lat, site->city->pos.lon, site->city->pos.elev,
 275                         &site_xyz[0], &site_xyz[1], &site_xyz[2]);
 276         gdouble dist = distd(site_xyz, eye_xyz);
 277
 278         /* Load or unload the site if necessasairy */
 279         if (dist <= min_dist && dist < elev*1.25 && site->status == STATUS_UNLOADED)
 280                 radar_site_load(site);
 281         else if (dist > 2*min_dist &&  site->status != STATUS_UNLOADED)
 282                 radar_site_unload(site);
 283 }
 284
 285 gboolean _site_add_marker(gpointer _site)
 286 {
 287         RadarSite *site = _site;
 288         site->marker = grits_marker_new(site->city->name);
 289         GRITS_OBJECT(site->marker)->center = site->city->pos;
 290         GRITS_OBJECT(site->marker)->lod    = EARTH_R*site->city->lod;
 291         grits_viewer_add(site->viewer, GRITS_OBJECT(site->marker),
 292                         GRITS_LEVEL_OVERLAY, FALSE);
 293         return FALSE;
 294 }
 295 RadarSite *radar_site_new(city_t *city, GtkWidget *pconfig,
 296                 GritsViewer *viewer, GritsPrefs *prefs, GritsHttp *http)
 297 {
 298         RadarSite *site = g_new0(RadarSite, 1);
 299         site->viewer  = g_object_ref(viewer);
 300         site->prefs   = g_object_ref(prefs);
 301         //site->http    = http;
 302         site->http    = grits_http_new(G_DIR_SEPARATOR_S
 303                         "nexrad" G_DIR_SEPARATOR_S
 304                         "level2" G_DIR_SEPARATOR_S);
 305         site->city    = city;
 306         site->pconfig = pconfig;
 307
 308         /* Set initial location */
 309         gdouble lat, lon, elev;
 310         grits_viewer_get_location(viewer, &lat, &lon, &elev);
 311         _site_on_location_changed(viewer, lat, lon, elev, site);
 312
 313         /* Add marker */
 314         g_idle_add_full(G_PRIORITY_LOW, _site_add_marker, site, NULL);
 315
 316         /* Connect signals */
 317         site->location_id  = g_signal_connect(viewer, "location-changed",
 318                         G_CALLBACK(_site_on_location_changed), site);
 319         return site;
 320 }
 321
 322 void radar_site_free(RadarSite *site)
 323 {
 324         radar_site_unload(site);
 325         grits_viewer_remove(site->viewer, GRITS_OBJECT(site->marker));
 326         if (site->location_id)
 327                 g_signal_handler_disconnect(site->viewer, site->location_id);
 328         grits_http_free(site->http);
 329         g_object_unref(site->viewer);
 330         g_object_unref(site->prefs);
 331         g_free(site);
 332 }
 333
 334
 335 /**************
 336  * RadarConus *
 337  **************/
 338 #define CONUS_NORTH       50.406626367301044
 339 #define CONUS_WEST       -127.620375523875420
 340 #define CONUS_WIDTH       3400.0
 341 #define CONUS_HEIGHT      1600.0
 342 #define CONUS_DEG_PER_PX  0.017971305190311
 343
 344 struct _RadarConus {
 345         GritsViewer *viewer;
 346         GritsHttp   *http;
 347         GtkWidget   *config;
 348         time_t       time;
 349         const gchar *message;
 350         GStaticMutex loading;
 351
 352         gchar       *path;
 353         GritsTile   *tile[2];
 354
 355         guint        time_id;     // "time-changed"     callback ID
 356         guint        refresh_id;  // "refresh"          callback ID
 357 };
 358
 359 void _conus_update_loading(gchar *file, goffset cur,
 360                 goffset total, gpointer _conus)
 361 {
 362         RadarConus *conus = _conus;
 363         GtkWidget *progress_bar = gtk_bin_get_child(GTK_BIN(conus->config));
 364         double percent = (double)cur/total;
 365         gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(progress_bar), MIN(percent, 1.0));
 366         gchar *msg = g_strdup_printf("Loading... %5.1f%% (%.2f/%.2f MB)",
 367                         percent*100, (double)cur/1000000, (double)total/1000000);
 368         gtk_progress_bar_set_text(GTK_PROGRESS_BAR(progress_bar), msg);
 369         g_free(msg);
 370 }
 371
 372 /* Copy images to graphics memory */
 373 static void _conus_update_end_copy(GritsTile *tile, guchar *pixels)
 374 {
 375         if (!tile->data) {
 376                 tile->data = g_new0(guint, 1);
 377                 glGenTextures(1, tile->data);
 378         }
 379
 380         guint *tex = tile->data;
 381         glBindTexture(GL_TEXTURE_2D, *tex);
 382
 383         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 384         glPixelStorei(GL_PACK_ALIGNMENT, 1);
 385         glTexImage2D(GL_TEXTURE_2D, 0, 4, 2048, 2048, 0,
 386                         GL_RGBA, GL_UNSIGNED_BYTE, NULL);
 387         glTexSubImage2D(GL_TEXTURE_2D, 0, 1,1, CONUS_WIDTH/2,CONUS_HEIGHT,
 388                         GL_RGBA, GL_UNSIGNED_BYTE, pixels);
 389         tile->coords.n = 1.0/(CONUS_WIDTH/2);
 390         tile->coords.w = 1.0/ CONUS_HEIGHT;
 391         tile->coords.s = tile->coords.n +  CONUS_HEIGHT   / 2048.0;
 392         tile->coords.e = tile->coords.w + (CONUS_WIDTH/2) / 2048.0;
 393         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 394         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 395         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
 396         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
 397         glFlush();
 398 }
 399
 400 /* Split the pixbuf into east and west halves (with 2K sides)
 401  * Also map the pixbuf's alpha values */
 402 static void _conus_update_end_split(guchar *pixels, guchar *west, guchar *east,
 403                 gint width, gint height, gint pxsize)
 404 {
 405         g_debug("Conus: update_end_split");
 406         guchar *out[] = {west,east};
 407         const guchar alphamap[][4] = {
 408                 {0x04, 0xe9, 0xe7, 0x30},
 409                 {0x01, 0x9f, 0xf4, 0x60},
 410                 {0x03, 0x00, 0xf4, 0x90},
 411         };
 412         for (int y = 0; y < height; y++)
 413         for (int x = 0; x < width;  x++) {
 414                 gint subx = x % (width/2);
 415                 gint idx  = x / (width/2);
 416                 guchar *src = &pixels[(y*width+x)*pxsize];
 417                 guchar *dst = &out[idx][(y*(width/2)+subx)*4];
 418                 if (src[0] > 0xe0 &&
 419                     src[1] > 0xe0 &&
 420                     src[2] > 0xe0) {
 421                         dst[3] = 0x00;
 422                 } else {
 423                         dst[0] = src[0];
 424                         dst[1] = src[1];
 425                         dst[2] = src[2];
 426                         dst[3] = 0xff;
 427                         for (int j = 0; j < G_N_ELEMENTS(alphamap); j++)
 428                                 if (src[0] == alphamap[j][0] &&
 429                                     src[1] == alphamap[j][1] &&
 430                                     src[2] == alphamap[j][2])
 431                                         dst[3] = alphamap[j][3];
 432                 }
 433         }
 434 }
 435
 436 gboolean _conus_update_end(gpointer _conus)
 437 {
 438         RadarConus *conus = _conus;
 439         g_debug("Conus: update_end");
 440
 441         /* Check error status */
 442         if (conus->message) {
 443                 g_warning("Conus: update_end - %s", conus->message);
 444                 _gtk_bin_set_child(GTK_BIN(conus->config), gtk_label_new(conus->message));
 445                 goto out;
 446         }
 447
 448         /* Load and pixbuf */
 449         GError *error = NULL;
 450         GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(conus->path, &error);
 451         if (!pixbuf || error) {
 452                 g_warning("Conus: update_end - error loading pixbuf: %s", conus->path);
 453                 _gtk_bin_set_child(GTK_BIN(conus->config), gtk_label_new("Error loading pixbuf"));
 454                 g_remove(conus->path);
 455                 goto out;
 456         }
 457
 458         /* Split pixels into east/west parts */
 459         guchar *pixels = gdk_pixbuf_get_pixels(pixbuf);
 460         gint    width  = gdk_pixbuf_get_width(pixbuf);
 461         gint    height = gdk_pixbuf_get_height(pixbuf);
 462         gint    pxsize = gdk_pixbuf_get_has_alpha(pixbuf) ? 4 : 3;
 463         guchar *pixels_west = g_malloc(4*(width/2)*height);
 464         guchar *pixels_east = g_malloc(4*(width/2)*height);
 465         _conus_update_end_split(pixels, pixels_west, pixels_east,
 466                         width, height, pxsize);
 467         g_object_unref(pixbuf);
 468
 469         /* Copy pixels to graphics memory */
 470         _conus_update_end_copy(conus->tile[0], pixels_west);
 471         _conus_update_end_copy(conus->tile[1], pixels_east);
 472         g_free(pixels_west);
 473         g_free(pixels_east);
 474
 475         /* Update GUI */
 476         gchar *label = g_path_get_basename(conus->path);
 477         _gtk_bin_set_child(GTK_BIN(conus->config), gtk_label_new(label));
 478         gtk_widget_queue_draw(GTK_WIDGET(conus->viewer));
 479         g_free(label);
 480
 481 out:
 482         g_free(conus->path);
 483         g_static_mutex_unlock(&conus->loading);
 484         return FALSE;
 485 }
 486
 487 gpointer _conus_update_thread(gpointer _conus)
 488 {
 489         RadarConus *conus = _conus;
 490         conus->message = NULL;
 491
 492         /* Find nearest */
 493         g_debug("Conus: update_thread - nearest");
 494         gboolean offline = grits_viewer_get_offline(conus->viewer);
 495         gchar *conus_url = "http://radar.weather.gov/Conus/RadarImg/";
 496         gchar *nearest;
 497         if (time(NULL) - conus->time < 60*60*5 && !offline) {
 498                 /* radar.weather.gov is full of lies.
 499                  * the index pages get cached and out of date */
 500                 /* gmtime is not thread safe, but it's not used very often so
 501                  * hopefully it'll be alright for now... :-( */
 502                 struct tm *tm = gmtime(&conus->time);
 503                 time_t onthe8 = conus->time - 60*((tm->tm_min+1)%10+1);
 504                 tm = gmtime(&onthe8);
 505                 nearest = g_strdup_printf("Conus_%04d%02d%02d_%02d%02d_N0Ronly.gif",
 506                                 tm->tm_year+1900, tm->tm_mon+1, tm->tm_mday,
 507                                 tm->tm_hour, tm->tm_min);
 508         } else {
 509                 GList *files = grits_http_available(conus->http,
 510                                 "^Conus_[^\"]*_N0Ronly.gif$", "", NULL, NULL);
 511                 nearest = _find_nearest(conus->time, files, 6);
 512                 g_list_foreach(files, (GFunc)g_free, NULL);
 513                 g_list_free(files);
 514                 if (!nearest) {
 515                         conus->message = "No suitable files";
 516                         goto out;
 517                 }
 518         }
 519
 520         /* Fetch the image */
 521         g_debug("Conus: update_thread - fetch");
 522         gchar *uri  = g_strconcat(conus_url, nearest, NULL);
 523         conus->path = grits_http_fetch(conus->http, uri, nearest,
 524                         offline ? GRITS_LOCAL : GRITS_ONCE,
 525                         _conus_update_loading, conus);
 526         g_free(nearest);
 527         g_free(uri);
 528         if (!conus->path) {
 529                 conus->message = "Fetch failed";
 530                 goto out;
 531         }
 532
 533 out:
 534         g_debug("Conus: update_thread - done");
 535         g_idle_add(_conus_update_end, conus);
 536         return NULL;
 537 }
 538
 539 void _conus_update(RadarConus *conus)
 540 {
 541         if (!g_static_mutex_trylock(&conus->loading))
 542                 return;
 543         conus->time = grits_viewer_get_time(conus->viewer);
 544         g_debug("Conus: update - %d",
 545                         (gint)conus->time);
 546
 547         /* Add a progress bar */
 548         GtkWidget *progress = gtk_progress_bar_new();
 549         gtk_progress_bar_set_text(GTK_PROGRESS_BAR(progress), "Loading...");
 550         _gtk_bin_set_child(GTK_BIN(conus->config), progress);
 551
 552         g_thread_create(_conus_update_thread, conus, FALSE, NULL);
 553 }
 554
 555 RadarConus *radar_conus_new(GtkWidget *pconfig,
 556                 GritsViewer *viewer, GritsHttp *http)
 557 {
 558         RadarConus *conus = g_new0(RadarConus, 1);
 559         conus->viewer  = g_object_ref(viewer);
 560         conus->http    = http;
 561         conus->config  = gtk_alignment_new(0, 0, 1, 1);
 562         g_static_mutex_init(&conus->loading);
 563
 564         gdouble south =  CONUS_NORTH - CONUS_DEG_PER_PX*CONUS_HEIGHT;
 565         gdouble east  =  CONUS_WEST  + CONUS_DEG_PER_PX*CONUS_WIDTH;
 566         gdouble mid   =  CONUS_WEST  + CONUS_DEG_PER_PX*CONUS_WIDTH/2;
 567         conus->tile[0] = grits_tile_new(NULL, CONUS_NORTH, south, mid, CONUS_WEST);
 568         conus->tile[1] = grits_tile_new(NULL, CONUS_NORTH, south, east, mid);
 569         conus->tile[0]->zindex = 2;
 570         conus->tile[1]->zindex = 1;
 571         grits_viewer_add(viewer, GRITS_OBJECT(conus->tile[0]), GRITS_LEVEL_WORLD, TRUE);
 572         grits_viewer_add(viewer, GRITS_OBJECT(conus->tile[1]), GRITS_LEVEL_WORLD, TRUE);
 573
 574         conus->time_id = g_signal_connect_swapped(viewer, "time-changed",
 575                         G_CALLBACK(_conus_update), conus);
 576         conus->refresh_id = g_signal_connect_swapped(viewer, "refresh",
 577                         G_CALLBACK(_conus_update), conus);
 578
 579         g_object_set_data(G_OBJECT(conus->config), "conus", conus);
 580         gtk_notebook_append_page(GTK_NOTEBOOK(pconfig), conus->config,
 581                         gtk_label_new("Conus"));
 582
 583         _conus_update(conus);
 584         return conus;
 585 }
 586
 587 void radar_conus_free(RadarConus *conus)
 588 {
 589         g_signal_handler_disconnect(conus->viewer, conus->time_id);
 590         g_signal_handler_disconnect(conus->viewer, conus->refresh_id);
 591
 592         for (int i = 0; i < 2; i++) {
 593                 GritsTile *tile = conus->tile[i];
 594                 if (tile->data) {
 595                         glDeleteTextures(1, tile->data);
 596                         g_free(tile->data);
 597                 }
 598                 grits_viewer_remove(conus->viewer, GRITS_OBJECT(tile));
 599         }
 600
 601         g_object_unref(conus->viewer);
 602         g_free(conus);
 603 }
 604
 605
 606 /********************
 607  * GritsPluginRadar *
 608  ********************/
 609 static void _draw_hud(GritsCallback *callback, GritsOpenGL *opengl, gpointer _self)
 610 {
 611         g_debug("GritsPluginRadar: _draw_hud");
 612         /* Setup OpenGL */
 613         glMatrixMode(GL_MODELVIEW ); glLoadIdentity();
 614         glMatrixMode(GL_PROJECTION); glLoadIdentity();
 615         glDisable(GL_TEXTURE_2D);
 616         glDisable(GL_ALPHA_TEST);
 617         glDisable(GL_CULL_FACE);
 618         glDisable(GL_LIGHTING);
 619         glEnable(GL_COLOR_MATERIAL);
 620
 621         GHashTableIter iter;
 622         gpointer name, _site;
 623         GritsPluginRadar *self = GRITS_PLUGIN_RADAR(_self);
 624         g_hash_table_iter_init(&iter, self->sites);
 625         while (g_hash_table_iter_next(&iter, &name, &_site)) {
 626                 /* Pick correct colormaps */
 627                 RadarSite *site = _site;
 628                 if (site->hidden || !site->level2)
 629                         continue;
 630                 AWeatherColormap *colormap = site->level2->sweep_colors;
 631
 632                 /* Print the color table */
 633                 glBegin(GL_QUADS);
 634                 int len = colormap->len;
 635                 for (int i = 0; i < len; i++) {
 636                         glColor4ubv(colormap->data[i]);
 637                         glVertex3f(-1.0, (float)((i  ) - len/2)/(len/2), 0.0); // bot left
 638                         glVertex3f(-1.0, (float)((i+1) - len/2)/(len/2), 0.0); // top left
 639                         glVertex3f(-0.9, (float)((i+1) - len/2)/(len/2), 0.0); // top right
 640                         glVertex3f(-0.9, (float)((i  ) - len/2)/(len/2), 0.0); // bot right
 641                 }
 642                 glEnd();
 643         }
 644 }
 645
 646 static void _load_colormap(gchar *filename, AWeatherColormap *cm)
 647 {
 648         g_debug("GritsPluginRadar: _load_colormap - %s", filename);
 649         FILE *file = fopen(filename, "r");
 650         if (!file)
 651                 g_error("GritsPluginRadar: open failed");
 652         guint8 color[4];
 653         GArray *array = g_array_sized_new(FALSE, TRUE, sizeof(color), 256);
 654         if (!fgets(cm->name, sizeof(cm->name), file)) goto out;
 655         if (!fscanf(file, "%f\n", &cm->scale))        goto out;
 656         if (!fscanf(file, "%f\n", &cm->shift))        goto out;
 657         int r, g, b, a;
 658         while (fscanf(file, "%d %d %d %d\n", &r, &g, &b, &a) == 4) {
 659                 color[0] = r;
 660                 color[1] = g;
 661                 color[2] = b;
 662                 color[3] = a;
 663                 g_array_append_val(array, color);
 664         }
 665         cm->len  = (gint )array->len;
 666         cm->data = (void*)array->data;
 667 out:
 668         g_array_free(array, FALSE);
 669         fclose(file);
 670 }
 671
 672 static void _update_hidden(GtkNotebook *notebook,
 673                 GtkNotebookPage *page, guint page_num, gpointer viewer)
 674 {
 675         g_debug("GritsPluginRadar: _update_hidden - 0..%d = %d",
 676                         gtk_notebook_get_n_pages(notebook), page_num);
 677
 678         for (gint i = 0; i < gtk_notebook_get_n_pages(notebook); i++) {
 679                 gboolean is_hidden = (i != page_num);
 680                 GtkWidget  *config = gtk_notebook_get_nth_page(notebook, i);
 681                 RadarConus *conus  = g_object_get_data(G_OBJECT(config), "conus");
 682                 RadarSite  *site   = g_object_get_data(G_OBJECT(config), "site");
 683
 684                 /* Conus */
 685                 if (conus) {
 686                         grits_object_hide(GRITS_OBJECT(conus->tile[0]), is_hidden);
 687                         grits_object_hide(GRITS_OBJECT(conus->tile[1]), is_hidden);
 688                 } else if (site) {
 689                         site->hidden = is_hidden;
 690                         if (site->level2)
 691                                 grits_object_hide(GRITS_OBJECT(site->level2), is_hidden);
 692                 } else {
 693                         g_warning("GritsPluginRadar: _update_hidden - no site or counus found");
 694                 }
 695         }
 696         gtk_widget_queue_draw(GTK_WIDGET(viewer));
 697 }
 698
 699 /* Methods */
 700 GritsPluginRadar *grits_plugin_radar_new(GritsViewer *viewer, GritsPrefs *prefs)
 701 {
 702         /* TODO: move to constructor if possible */
 703         g_debug("GritsPluginRadar: new");
 704         GritsPluginRadar *self = g_object_new(GRITS_TYPE_PLUGIN_RADAR, NULL);
 705         self->viewer = viewer;
 706         self->prefs  = prefs;
 707
 708         /* Setup page switching */
 709         self->tab_id = g_signal_connect(self->config, "switch-page",
 710                         G_CALLBACK(_update_hidden), viewer);
 711
 712         /* Load HUD */
 713         self->hud = grits_callback_new(_draw_hud, self);
 714         grits_viewer_add(viewer, GRITS_OBJECT(self->hud), GRITS_LEVEL_HUD, FALSE);
 715
 716         /* Load Conus */
 717         self->conus = radar_conus_new(self->config, self->viewer, self->conus_http);
 718
 719         /* Load radar sites */
 720         for (city_t *city = cities; city->type; city++) {
 721                 if (city->type != LOCATION_CITY)
 722                         continue;
 723                 RadarSite *site = radar_site_new(city, self->config,
 724                                 self->viewer, self->prefs, self->sites_http);
 725                 g_hash_table_insert(self->sites, city->code, site);
 726         }
 727
 728         return self;
 729 }
 730
 731 static GtkWidget *grits_plugin_radar_get_config(GritsPlugin *_self)
 732 {
 733         GritsPluginRadar *self = GRITS_PLUGIN_RADAR(_self);
 734         return self->config;
 735 }
 736
 737 /* GObject code */
 738 static void grits_plugin_radar_plugin_init(GritsPluginInterface *iface);
 739 G_DEFINE_TYPE_WITH_CODE(GritsPluginRadar, grits_plugin_radar, G_TYPE_OBJECT,
 740                 G_IMPLEMENT_INTERFACE(GRITS_TYPE_PLUGIN,
 741                         grits_plugin_radar_plugin_init));
 742 static void grits_plugin_radar_plugin_init(GritsPluginInterface *iface)
 743 {
 744         g_debug("GritsPluginRadar: plugin_init");
 745         /* Add methods to the interface */
 746         iface->get_config = grits_plugin_radar_get_config;
 747 }
 748 static void grits_plugin_radar_init(GritsPluginRadar *self)
 749 {
 750         g_debug("GritsPluginRadar: class_init");
 751         /* Set defaults */
 752         self->sites_http = grits_http_new(G_DIR_SEPARATOR_S
 753                         "nexrad" G_DIR_SEPARATOR_S
 754                         "level2" G_DIR_SEPARATOR_S);
 755         self->conus_http = grits_http_new(G_DIR_SEPARATOR_S
 756                         "nexrad" G_DIR_SEPARATOR_S
 757                         "conus"  G_DIR_SEPARATOR_S);
 758         self->sites      = g_hash_table_new_full(g_str_hash, g_str_equal,
 759                                 NULL, (GDestroyNotify)radar_site_free);
 760         self->config     = gtk_notebook_new();
 761
 762         /* Load colormaps */
 763         for (int i = 0; colormaps[i].file; i++) {
 764                 gchar *file = g_build_filename(PKGDATADIR,
 765                                 "colors", colormaps[i].file, NULL);
 766                 _load_colormap(file, &colormaps[i]);
 767                 g_free(file);
 768         }
 769
 770         /* Need to position on the top because of Win32 bug */
 771         gtk_notebook_set_tab_pos(GTK_NOTEBOOK(self->config), GTK_POS_LEFT);
 772 }
 773 static void grits_plugin_radar_dispose(GObject *gobject)
 774 {
 775         g_debug("GritsPluginRadar: dispose");
 776         GritsPluginRadar *self = GRITS_PLUGIN_RADAR(gobject);
 777         g_signal_handler_disconnect(self->config, self->tab_id);
 778         grits_viewer_remove(self->viewer, GRITS_OBJECT(self->hud));
 779         radar_conus_free(self->conus);
 780         /* Drop references */
 781         G_OBJECT_CLASS(grits_plugin_radar_parent_class)->dispose(gobject);
 782 }
 783 static void grits_plugin_radar_finalize(GObject *gobject)
 784 {
 785         g_debug("GritsPluginRadar: finalize");
 786         GritsPluginRadar *self = GRITS_PLUGIN_RADAR(gobject);
 787         /* Free data */
 788         grits_http_free(self->conus_http);
 789         grits_http_free(self->sites_http);
 790         g_hash_table_destroy(self->sites);
 791         gtk_widget_destroy(self->config);
 792         G_OBJECT_CLASS(grits_plugin_radar_parent_class)->finalize(gobject);
 793
 794 }
 795 static void grits_plugin_radar_class_init(GritsPluginRadarClass *klass)
 796 {
 797         g_debug("GritsPluginRadar: class_init");
 798         GObjectClass *gobject_class = (GObjectClass*)klass;
 799         gobject_class->dispose  = grits_plugin_radar_dispose;
 800         gobject_class->finalize = grits_plugin_radar_finalize;
 801 }