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

   1 /*
   2  * Copyright (C) 2009-2010 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 <sys/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, gchar *format)
  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                 strptime(file+offset, format, &tm);
  54                 if (ABS(time - mktime(&tm)) <
  55                     ABS(time - nearest_time)) {
  56                         nearest_file = file;
  57                         nearest_time = mktime(&tm);
  58                 }
  59         }
  60
  61         g_debug("RadarSite: find_nearest = %s", nearest_file);
  62         if (nearest_file)
  63                 return g_strdup(nearest_file);
  64         else
  65                 return NULL;
  66 }
  67
  68
  69 /**************
  70  * RadarSites *
  71  **************/
  72 typedef enum {
  73         STATUS_UNLOADED,
  74         STATUS_LOADING,
  75         STATUS_LOADED,
  76 } RadarSiteStatus;
  77 struct _RadarSite {
  78         /* Information */
  79         city_t         *city;
  80         GritsMarker    *marker;      // Map marker for grits
  81
  82         /* Stuff from the parents */
  83         GritsViewer    *viewer;
  84         GritsHttp      *http;
  85         GritsPrefs     *prefs;
  86         GtkWidget      *pconfig;
  87
  88         /* When loaded */
  89         gboolean        hidden;
  90         RadarSiteStatus status;      // Loading status for the site
  91         GtkWidget      *config;
  92         AWeatherLevel2 *level2;      // The Level2 structure for the current volume
  93
  94         /* Internal data */
  95         time_t          time;        // Current timestamp of the level2
  96         gchar          *message;     // Error message set while updating
  97         guint           time_id;     // "time-changed"     callback ID
  98         guint           refresh_id;  // "refresh"          callback ID
  99         guint           location_id; // "locaiton-changed" callback ID
 100 };
 101
 102 /* format: http://mesonet.agron.iastate.edu/data/nexrd2/raw/KABR/KABR_20090510_0323 */
 103 void _site_update_loading(gchar *file, goffset cur,
 104                 goffset total, gpointer _site)
 105 {
 106         RadarSite *site = _site;
 107         GtkWidget *progress_bar = gtk_bin_get_child(GTK_BIN(site->config));
 108         double percent = (double)cur/total;
 109         gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(progress_bar), MIN(percent, 1.0));
 110         gchar *msg = g_strdup_printf("Loading... %5.1f%% (%.2f/%.2f MB)",
 111                         percent*100, (double)cur/1000000, (double)total/1000000);
 112         gtk_progress_bar_set_text(GTK_PROGRESS_BAR(progress_bar), msg);
 113         g_free(msg);
 114 }
 115 gboolean _site_update_end(gpointer _site)
 116 {
 117         RadarSite *site = _site;
 118         if (site->message) {
 119                 g_warning("RadarSite: update_end - %s", site->message);
 120                 _gtk_bin_set_child(GTK_BIN(site->config),
 121                                 gtk_label_new(site->message));
 122         } else {
 123                 _gtk_bin_set_child(GTK_BIN(site->config),
 124                                 aweather_level2_get_config(site->level2));
 125         }
 126         site->status = STATUS_LOADED;
 127         return FALSE;
 128 }
 129 gpointer _site_update_thread(gpointer _site)
 130 {
 131         RadarSite *site = _site;
 132         g_debug("RadarSite: update_thread - %s", site->city->code);
 133         site->message = NULL;
 134
 135         gboolean offline = grits_viewer_get_offline(site->viewer);
 136         gchar *nexrad_url = grits_prefs_get_string(site->prefs,
 137                         "aweather/nexrad_url", NULL);
 138
 139         /* Find nearest volume (temporally) */
 140         g_debug("RadarSite: update_thread - find nearest - %s", site->city->code);
 141         gchar *dir_list = g_strconcat(nexrad_url, "/", site->city->code,
 142                         "/", "dir.list", NULL);
 143         GList *files = grits_http_available(site->http,
 144                         "^K\\w{3}_\\d{8}_\\d{4}$", site->city->code,
 145                         "\\d+ (.*)", (offline ? NULL : dir_list));
 146         g_free(dir_list);
 147         gchar *nearest = _find_nearest(site->time, files, 5, "%Y%m%d_%H%M");
 148         g_list_foreach(files, (GFunc)g_free, NULL);
 149         g_list_free(files);
 150         if (!nearest) {
 151                 site->message = "No suitable files found";
 152                 goto out;
 153         }
 154
 155         /* Fetch new volume */
 156         g_debug("RadarSite: update_thread - fetch");
 157         gchar *local = g_strconcat(site->city->code, "/", nearest, NULL);
 158         gchar *uri   = g_strconcat(nexrad_url, "/", local,   NULL);
 159         gchar *file  = grits_http_fetch(site->http, uri, local,
 160                         offline ? GRITS_LOCAL : GRITS_UPDATE,
 161                         _site_update_loading, site);
 162         g_free(nexrad_url);
 163         g_free(nearest);
 164         g_free(local);
 165         g_free(uri);
 166         if (!file) {
 167                 site->message = "Fetch failed";
 168                 goto out;
 169         }
 170
 171         /* Load and add new volume */
 172         g_debug("RadarSite: update_thread - load - %s", site->city->code);
 173         site->level2 = aweather_level2_new_from_file(
 174                         file, site->city->code, colormaps);
 175         g_free(file);
 176         if (!site->level2) {
 177                 site->message = "Load failed";
 178                 goto out;
 179         }
 180         grits_object_hide(GRITS_OBJECT(site->level2), site->hidden);
 181         grits_viewer_add(site->viewer, GRITS_OBJECT(site->level2),
 182                         GRITS_LEVEL_WORLD, TRUE);
 183
 184 out:
 185         g_idle_add(_site_update_end, site);
 186         return NULL;
 187 }
 188 void _site_update(RadarSite *site)
 189 {
 190         if (site->status == STATUS_LOADING)
 191                 return;
 192         site->status = STATUS_LOADING;
 193
 194         site->time = grits_viewer_get_time(site->viewer);
 195         g_debug("RadarSite: update %s - %d",
 196                         site->city->code, (gint)site->time);
 197
 198         /* Add a progress bar */
 199         GtkWidget *progress = gtk_progress_bar_new();
 200         gtk_progress_bar_set_text(GTK_PROGRESS_BAR(progress), "Loading...");
 201         _gtk_bin_set_child(GTK_BIN(site->config), progress);
 202
 203         /* Remove old volume */
 204         g_debug("RadarSite: update - remove - %s", site->city->code);
 205         if (site->level2) {
 206                 grits_viewer_remove(site->viewer, site->level2);
 207                 site->level2 = NULL;
 208         }
 209
 210         /* Fork loading right away so updating the
 211          * list of times doesn't take too long */
 212         g_thread_create(_site_update_thread, site, FALSE, NULL);
 213 }
 214
 215 /* RadarSite methods */
 216 void radar_site_unload(RadarSite *site)
 217 {
 218         if (site->status != STATUS_LOADED)
 219                 return; // Abort if it's still loading
 220
 221         g_debug("RadarSite: unload %s", site->city->code);
 222
 223         if (site->time_id)
 224                 g_signal_handler_disconnect(site->viewer, site->time_id);
 225         if (site->refresh_id)
 226                 g_signal_handler_disconnect(site->viewer, site->refresh_id);
 227
 228         /* Remove tab */
 229         if (site->config)
 230                 gtk_widget_destroy(site->config);
 231
 232         /* Remove radar */
 233         if (site->level2) {
 234                 grits_viewer_remove(site->viewer, site->level2);
 235                 site->level2 = NULL;
 236         }
 237
 238         site->status = STATUS_UNLOADED;
 239 }
 240
 241 void radar_site_load(RadarSite *site)
 242 {
 243         g_debug("RadarSite: load %s", site->city->code);
 244
 245         /* Add tab page */
 246         site->config = gtk_alignment_new(0, 0, 1, 1);
 247         g_object_set_data(G_OBJECT(site->config), "site", site);
 248         gtk_notebook_append_page(GTK_NOTEBOOK(site->pconfig), site->config,
 249                         gtk_label_new(site->city->name));
 250         gtk_widget_show_all(site->config);
 251
 252         /* Set up radar loading */
 253         site->time_id = g_signal_connect_swapped(site->viewer, "time-changed",
 254                         G_CALLBACK(_site_update), site);
 255         site->refresh_id = g_signal_connect_swapped(site->viewer, "refresh",
 256                         G_CALLBACK(_site_update), site);
 257         _site_update(site);
 258 }
 259
 260 void _site_on_location_changed(GritsViewer *viewer,
 261                 gdouble lat, gdouble lon, gdouble elev,
 262                 gpointer _site)
 263 {
 264         static gdouble min_dist = EARTH_R / 30;
 265         RadarSite *site = _site;
 266
 267         /* Calculate distance, could cache xyz values */
 268         gdouble eye_xyz[3], site_xyz[3];
 269         lle2xyz(lat, lon, elev, &eye_xyz[0], &eye_xyz[1], &eye_xyz[2]);
 270         lle2xyz(site->city->pos.lat, site->city->pos.lon, site->city->pos.elev,
 271                         &site_xyz[0], &site_xyz[1], &site_xyz[2]);
 272         gdouble dist = distd(site_xyz, eye_xyz);
 273
 274         /* Load or unload the site if necessasairy */
 275         if (dist <= min_dist && dist < elev*1.25 && site->status == STATUS_UNLOADED)
 276                 radar_site_load(site);
 277         else if (dist > 2*min_dist &&  site->status != STATUS_UNLOADED)
 278                 radar_site_unload(site);
 279 }
 280
 281 gboolean _site_add_marker(gpointer _site)
 282 {
 283         RadarSite *site = _site;
 284         site->marker = grits_marker_new(site->city->name);
 285         GRITS_OBJECT(site->marker)->center = site->city->pos;
 286         GRITS_OBJECT(site->marker)->lod    = EARTH_R*site->city->lod;
 287         grits_viewer_add(site->viewer, GRITS_OBJECT(site->marker),
 288                         GRITS_LEVEL_OVERLAY, FALSE);
 289         return FALSE;
 290 }
 291 RadarSite *radar_site_new(city_t *city, GtkWidget *pconfig,
 292                 GritsViewer *viewer, GritsPrefs *prefs, GritsHttp *http)
 293 {
 294         RadarSite *site = g_new0(RadarSite, 1);
 295         site->viewer  = g_object_ref(viewer);
 296         site->prefs   = g_object_ref(prefs);
 297         //site->http    = http;
 298         site->http    = grits_http_new(G_DIR_SEPARATOR_S
 299                         "nexrad" G_DIR_SEPARATOR_S
 300                         "level2" G_DIR_SEPARATOR_S);
 301         site->city    = city;
 302         site->pconfig = pconfig;
 303
 304         /* Add marker */
 305         g_idle_add_full(G_PRIORITY_LOW, _site_add_marker, site, NULL);
 306
 307         /* Connect signals */
 308         site->location_id  = g_signal_connect(viewer, "location-changed",
 309                         G_CALLBACK(_site_on_location_changed), site);
 310         return site;
 311 }
 312
 313 void radar_site_free(RadarSite *site)
 314 {
 315         radar_site_unload(site);
 316         grits_viewer_remove(site->viewer, site->marker);
 317         if (site->location_id)
 318                 g_signal_handler_disconnect(site->viewer, site->location_id);
 319         grits_http_free(site->http);
 320         g_object_unref(site->viewer);
 321         g_object_unref(site->prefs);
 322         g_free(site);
 323 }
 324
 325
 326 /**************
 327  * RadarConus *
 328  **************/
 329 #define CONUS_NORTH       50.406626367301044
 330 #define CONUS_WEST       -127.620375523875420
 331 #define CONUS_WIDTH       3400.0
 332 #define CONUS_HEIGHT      1600.0
 333 #define CONUS_DEG_PER_PX  0.017971305190311
 334
 335 struct _RadarConus {
 336         GritsViewer *viewer;
 337         GritsHttp   *http;
 338         GtkWidget   *config;
 339         time_t       time;
 340         const gchar *message;
 341         GStaticMutex loading;
 342
 343         gchar       *path;
 344         GritsTile   *tile[2];
 345
 346         guint        time_id;     // "time-changed"     callback ID
 347         guint        refresh_id;  // "refresh"          callback ID
 348 };
 349
 350 void _conus_update_loading(gchar *file, goffset cur,
 351                 goffset total, gpointer _conus)
 352 {
 353         RadarConus *conus = _conus;
 354         GtkWidget *progress_bar = gtk_bin_get_child(GTK_BIN(conus->config));
 355         double percent = (double)cur/total;
 356         gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(progress_bar), MIN(percent, 1.0));
 357         gchar *msg = g_strdup_printf("Loading... %5.1f%% (%.2f/%.2f MB)",
 358                         percent*100, (double)cur/1000000, (double)total/1000000);
 359         gtk_progress_bar_set_text(GTK_PROGRESS_BAR(progress_bar), msg);
 360         g_free(msg);
 361 }
 362
 363 /* Copy images to graphics memory */
 364 static void _conus_update_end_copy(GritsTile *tile, guchar *pixels)
 365 {
 366         if (!tile->data) {
 367                 tile->data = g_new0(guint, 1);
 368                 glGenTextures(1, tile->data);
 369         }
 370
 371         guint *tex = tile->data;
 372         glBindTexture(GL_TEXTURE_2D, *tex);
 373
 374         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 375         glPixelStorei(GL_PACK_ALIGNMENT, 1);
 376         glTexImage2D(GL_TEXTURE_2D, 0, 4, 2048, 2048, 0,
 377                         GL_RGBA, GL_UNSIGNED_BYTE, NULL);
 378         glTexSubImage2D(GL_TEXTURE_2D, 0, 1,1, CONUS_WIDTH/2,CONUS_HEIGHT,
 379                         GL_RGBA, GL_UNSIGNED_BYTE, pixels);
 380         tile->coords.n = 1.0/(CONUS_WIDTH/2);
 381         tile->coords.w = 1.0/ CONUS_HEIGHT;
 382         tile->coords.s = tile->coords.n +  CONUS_HEIGHT   / 2048.0;
 383         tile->coords.e = tile->coords.w + (CONUS_WIDTH/2) / 2048.0;
 384         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 385         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 386         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
 387         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
 388         glFlush();
 389 }
 390
 391 /* Split the pixbuf into east and west halves (with 2K sides)
 392  * Also map the pixbuf's alpha values */
 393 static void _conus_update_end_split(guchar *pixels, guchar *west, guchar *east,
 394                 gint width, gint height, gint pxsize)
 395 {
 396         g_debug("Conus: update_end_split");
 397         guchar *out[] = {west,east};
 398         const guchar alphamap[][4] = {
 399                 {0x04, 0xe9, 0xe7, 0x30},
 400                 {0x01, 0x9f, 0xf4, 0x60},
 401                 {0x03, 0x00, 0xf4, 0x90},
 402         };
 403         for (int y = 0; y < height; y++)
 404         for (int x = 0; x < width;  x++) {
 405                 gint subx = x % (width/2);
 406                 gint idx  = x / (width/2);
 407                 guchar *src = &pixels[(y*width+x)*pxsize];
 408                 guchar *dst = &out[idx][(y*(width/2)+subx)*4];
 409                 if (src[0] > 0xe0 &&
 410                     src[1] > 0xe0 &&
 411                     src[2] > 0xe0) {
 412                         dst[3] = 0x00;
 413                 } else {
 414                         dst[0] = src[0];
 415                         dst[1] = src[1];
 416                         dst[2] = src[2];
 417                         dst[3] = 0xff;
 418                         for (int j = 0; j < G_N_ELEMENTS(alphamap); j++)
 419                                 if (src[0] == alphamap[j][0] &&
 420                                     src[1] == alphamap[j][1] &&
 421                                     src[2] == alphamap[j][2])
 422                                         dst[3] = alphamap[j][3];
 423                 }
 424         }
 425 }
 426
 427 gboolean _conus_update_end(gpointer _conus)
 428 {
 429         RadarConus *conus = _conus;
 430         g_debug("Conus: update_end");
 431
 432         /* Check error status */
 433         if (conus->message) {
 434                 g_warning("Conus: update_end - %s", conus->message);
 435                 _gtk_bin_set_child(GTK_BIN(conus->config), gtk_label_new(conus->message));
 436                 goto out;
 437         }
 438
 439         /* Load and pixbuf */
 440         GError *error = NULL;
 441         GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(conus->path, &error);
 442         if (!pixbuf || error) {
 443                 g_warning("Conus: update_end - error loading pixbuf");
 444                 _gtk_bin_set_child(GTK_BIN(conus->config), gtk_label_new("Error loading pixbuf"));
 445                 g_remove(conus->path);
 446                 goto out;
 447         }
 448
 449         /* Split pixels into east/west parts */
 450         guchar *pixels = gdk_pixbuf_get_pixels(pixbuf);
 451         gint    width  = gdk_pixbuf_get_width(pixbuf);
 452         gint    height = gdk_pixbuf_get_height(pixbuf);
 453         gint    pxsize = gdk_pixbuf_get_has_alpha(pixbuf) ? 4 : 3;
 454         guchar *pixels_west = g_malloc(4*(width/2)*height);
 455         guchar *pixels_east = g_malloc(4*(width/2)*height);
 456         _conus_update_end_split(pixels, pixels_west, pixels_east,
 457                         width, height, pxsize);
 458         g_object_unref(pixbuf);
 459
 460         /* Copy pixels to graphics memory */
 461         _conus_update_end_copy(conus->tile[0], pixels_west);
 462         _conus_update_end_copy(conus->tile[1], pixels_east);
 463         g_free(pixels_west);
 464         g_free(pixels_east);
 465
 466         /* Update GUI */
 467         gchar *label = g_path_get_basename(conus->path);
 468         _gtk_bin_set_child(GTK_BIN(conus->config), gtk_label_new(label));
 469         gtk_widget_queue_draw(GTK_WIDGET(conus->viewer));
 470         g_free(label);
 471
 472 out:
 473         g_free(conus->path);
 474         g_static_mutex_unlock(&conus->loading);
 475         return FALSE;
 476 }
 477
 478 gpointer _conus_update_thread(gpointer _conus)
 479 {
 480         RadarConus *conus = _conus;
 481         conus->message = NULL;
 482
 483         /* Find nearest */
 484         g_debug("Conus: update_thread - nearest");
 485         gchar *conus_url = "http://radar.weather.gov/Conus/RadarImg/";
 486         gchar *nearest;
 487         if (time(NULL) - conus->time < 60*60*5){
 488                 /* radar.weather.gov is full of lies.
 489                  * the index pages get cached and out of date */
 490                 struct tm tm;
 491                 gmtime_r(&conus->time, &tm);
 492                 time_t onthe8 = conus->time - 60*((tm.tm_min+2)%10);
 493                 gmtime_r(&onthe8, &tm);
 494                 nearest = g_strdup_printf("Conus_%04d%02d%02d_%02d%02d_N0Ronly.gif",
 495                                 tm.tm_year+1900, tm.tm_mon+1, tm.tm_mday,
 496                                 tm.tm_hour, tm.tm_min);
 497         } else {
 498                 GList *files = grits_http_available(conus->http,
 499                                 "^Conus_[^\"]*_N0Ronly.gif$", "", NULL, NULL);
 500                 nearest = _find_nearest(conus->time, files, 6, "%Y%m%d_%H%M");
 501                 g_list_foreach(files, (GFunc)g_free, NULL);
 502                 g_list_free(files);
 503                 if (!nearest) {
 504                         conus->message = "No suitable files";
 505                         goto out;
 506                 }
 507         }
 508
 509         /* Fetch the image */
 510         g_debug("Conus: update_thread - fetch");
 511         gchar *uri  = g_strconcat(conus_url, nearest, NULL);
 512         conus->path = grits_http_fetch(conus->http, uri, nearest, GRITS_ONCE,
 513                         _conus_update_loading, conus);
 514         g_free(nearest);
 515         g_free(uri);
 516         if (!conus->path) {
 517                 conus->message = "Fetch failed";
 518                 goto out;
 519         }
 520
 521 out:
 522         g_debug("Conus: update_thread - done");
 523         g_idle_add(_conus_update_end, conus);
 524         return NULL;
 525 }
 526
 527 void _conus_update(RadarConus *conus)
 528 {
 529         if (!g_static_mutex_trylock(&conus->loading))
 530                 return;
 531         conus->time = grits_viewer_get_time(conus->viewer);
 532         g_debug("Conus: update - %d",
 533                         (gint)conus->time);
 534
 535         /* Add a progress bar */
 536         GtkWidget *progress = gtk_progress_bar_new();
 537         gtk_progress_bar_set_text(GTK_PROGRESS_BAR(progress), "Loading...");
 538         _gtk_bin_set_child(GTK_BIN(conus->config), progress);
 539
 540         g_thread_create(_conus_update_thread, conus, FALSE, NULL);
 541 }
 542
 543 RadarConus *radar_conus_new(GtkWidget *pconfig,
 544                 GritsViewer *viewer, GritsHttp *http)
 545 {
 546         RadarConus *conus = g_new0(RadarConus, 1);
 547         conus->viewer  = g_object_ref(viewer);
 548         conus->http    = http;
 549         conus->config  = gtk_alignment_new(0, 0, 1, 1);
 550         g_static_mutex_init(&conus->loading);
 551
 552         gdouble south =  CONUS_NORTH - CONUS_DEG_PER_PX*CONUS_HEIGHT;
 553         gdouble east  =  CONUS_WEST  + CONUS_DEG_PER_PX*CONUS_WIDTH;
 554         gdouble mid   =  CONUS_WEST  + CONUS_DEG_PER_PX*CONUS_WIDTH/2;
 555         conus->tile[0] = grits_tile_new(NULL, CONUS_NORTH, south, mid, CONUS_WEST);
 556         conus->tile[1] = grits_tile_new(NULL, CONUS_NORTH, south, east, mid);
 557         conus->tile[0]->zindex = 2;
 558         conus->tile[1]->zindex = 1;
 559         grits_viewer_add(viewer, GRITS_OBJECT(conus->tile[0]), GRITS_LEVEL_WORLD, TRUE);
 560         grits_viewer_add(viewer, GRITS_OBJECT(conus->tile[1]), GRITS_LEVEL_WORLD, TRUE);
 561
 562         conus->time_id = g_signal_connect_swapped(viewer, "time-changed",
 563                         G_CALLBACK(_conus_update), conus);
 564         conus->refresh_id = g_signal_connect_swapped(viewer, "refresh",
 565                         G_CALLBACK(_conus_update), conus);
 566
 567         g_object_set_data(G_OBJECT(conus->config), "conus", conus);
 568         gtk_notebook_append_page(GTK_NOTEBOOK(pconfig), conus->config,
 569                         gtk_label_new("Conus"));
 570
 571         _conus_update(conus);
 572         return conus;
 573 }
 574
 575 void radar_conus_free(RadarConus *conus)
 576 {
 577         g_signal_handler_disconnect(conus->viewer, conus->time_id);
 578         g_signal_handler_disconnect(conus->viewer, conus->refresh_id);
 579
 580         for (int i = 0; i < 2; i++) {
 581                 GritsTile *tile = conus->tile[i];
 582                 if (tile->data) {
 583                         glDeleteTextures(1, tile->data);
 584                         g_free(tile->data);
 585                 }
 586                 grits_viewer_remove(conus->viewer, tile);
 587         }
 588
 589         g_object_unref(conus->viewer);
 590         g_free(conus);
 591 }
 592
 593
 594 /********************
 595  * GritsPluginRadar *
 596  ********************/
 597 static void _draw_hud(GritsCallback *callback, GritsOpenGL *opengl, gpointer _self)
 598 {
 599         g_debug("GritsPluginRadar: _draw_hud");
 600         /* Setup OpenGL */
 601         glMatrixMode(GL_MODELVIEW ); glLoadIdentity();
 602         glMatrixMode(GL_PROJECTION); glLoadIdentity();
 603         glDisable(GL_TEXTURE_2D);
 604         glDisable(GL_ALPHA_TEST);
 605         glDisable(GL_CULL_FACE);
 606         glDisable(GL_LIGHTING);
 607         glEnable(GL_COLOR_MATERIAL);
 608
 609         GHashTableIter iter;
 610         gpointer name, _site;
 611         GritsPluginRadar *self = GRITS_PLUGIN_RADAR(_self);
 612         g_hash_table_iter_init(&iter, self->sites);
 613         while (g_hash_table_iter_next(&iter, &name, &_site)) {
 614                 /* Pick correct colormaps */
 615                 RadarSite *site = _site;
 616                 if (site->hidden || !site->level2)
 617                         continue;
 618                 AWeatherColormap *colormap = site->level2->sweep_colors;
 619
 620                 /* Print the color table */
 621                 glBegin(GL_QUADS);
 622                 int len = colormap->len;
 623                 for (int i = 0; i < len; i++) {
 624                         glColor4ubv(colormap->data[i]);
 625                         glVertex3f(-1.0, (float)((i  ) - len/2)/(len/2), 0.0); // bot left
 626                         glVertex3f(-1.0, (float)((i+1) - len/2)/(len/2), 0.0); // top left
 627                         glVertex3f(-0.9, (float)((i+1) - len/2)/(len/2), 0.0); // top right
 628                         glVertex3f(-0.9, (float)((i  ) - len/2)/(len/2), 0.0); // bot right
 629                 }
 630                 glEnd();
 631         }
 632 }
 633
 634 static void _load_colormap(gchar *filename, AWeatherColormap *cm)
 635 {
 636         g_debug("GritsPluginRadar: _load_colormap - %s", filename);
 637         FILE *file = g_fopen(filename, "r");
 638         if (!file)
 639                 g_error("GritsPluginRadar: open failed");
 640         guint8 color[4];
 641         GArray *array = g_array_sized_new(FALSE, TRUE, sizeof(color), 256);
 642         fgets(cm->name, sizeof(cm->name), file);
 643         fscanf(file, "%f\n", &cm->scale);
 644         fscanf(file, "%f\n", &cm->shift);
 645         int r, g, b, a;
 646         while (fscanf(file, "%d %d %d %d\n", &r, &g, &b, &a) == 4) {
 647                 color[0] = r;
 648                 color[1] = g;
 649                 color[2] = b;
 650                 color[3] = a;
 651                 g_array_append_val(array, color);
 652         }
 653         cm->len  = (gint )array->len;
 654         cm->data = (void*)array->data;
 655         g_array_free(array, FALSE);
 656 }
 657
 658 static void _update_hidden(GtkNotebook *notebook,
 659                 GtkNotebookPage *page, guint page_num, gpointer viewer)
 660 {
 661         g_debug("GritsPluginRadar: _update_hidden - 0..%d = %d",
 662                         gtk_notebook_get_n_pages(notebook), page_num);
 663
 664         for (gint i = 0; i < gtk_notebook_get_n_pages(notebook); i++) {
 665                 gboolean is_hidden = (i != page_num);
 666                 GtkWidget  *config = gtk_notebook_get_nth_page(notebook, i);
 667                 RadarConus *conus  = g_object_get_data(G_OBJECT(config), "conus");
 668                 RadarSite  *site   = g_object_get_data(G_OBJECT(config), "site");
 669
 670                 /* Conus */
 671                 if (conus) {
 672                         grits_object_hide(GRITS_OBJECT(conus->tile[0]), is_hidden);
 673                         grits_object_hide(GRITS_OBJECT(conus->tile[1]), is_hidden);
 674                 } else if (site) {
 675                         site->hidden = is_hidden;
 676                         if (site->level2)
 677                                 grits_object_hide(GRITS_OBJECT(site->level2), is_hidden);
 678                 } else {
 679                         g_warning("GritsPluginRadar: _update_hidden - no site or counus found");
 680                 }
 681         }
 682         gtk_widget_queue_draw(GTK_WIDGET(viewer));
 683 }
 684
 685 /* Methods */
 686 GritsPluginRadar *grits_plugin_radar_new(GritsViewer *viewer, GritsPrefs *prefs)
 687 {
 688         /* TODO: move to constructor if possible */
 689         g_debug("GritsPluginRadar: new");
 690         GritsPluginRadar *self = g_object_new(GRITS_TYPE_PLUGIN_RADAR, NULL);
 691         self->viewer = viewer;
 692         self->prefs  = prefs;
 693
 694         /* Setup page switching */
 695         self->tab_id = g_signal_connect(self->config, "switch-page",
 696                         G_CALLBACK(_update_hidden), viewer);
 697
 698         /* Load HUD */
 699         self->hud = grits_callback_new(_draw_hud, self);
 700         grits_viewer_add(viewer, GRITS_OBJECT(self->hud), GRITS_LEVEL_HUD, FALSE);
 701
 702         /* Load Conus */
 703         self->conus = radar_conus_new(self->config, self->viewer, self->conus_http);
 704
 705         /* Load radar sites */
 706         for (city_t *city = cities; city->type; city++) {
 707                 if (city->type != LOCATION_CITY)
 708                         continue;
 709                 RadarSite *site = radar_site_new(city, self->config,
 710                                 self->viewer, self->prefs, self->sites_http);
 711                 g_hash_table_insert(self->sites, city->code, site);
 712         }
 713
 714         return self;
 715 }
 716
 717 static GtkWidget *grits_plugin_radar_get_config(GritsPlugin *_self)
 718 {
 719         GritsPluginRadar *self = GRITS_PLUGIN_RADAR(_self);
 720         return self->config;
 721 }
 722
 723 /* GObject code */
 724 static void grits_plugin_radar_plugin_init(GritsPluginInterface *iface);
 725 G_DEFINE_TYPE_WITH_CODE(GritsPluginRadar, grits_plugin_radar, G_TYPE_OBJECT,
 726                 G_IMPLEMENT_INTERFACE(GRITS_TYPE_PLUGIN,
 727                         grits_plugin_radar_plugin_init));
 728 static void grits_plugin_radar_plugin_init(GritsPluginInterface *iface)
 729 {
 730         g_debug("GritsPluginRadar: plugin_init");
 731         /* Add methods to the interface */
 732         iface->get_config = grits_plugin_radar_get_config;
 733 }
 734 static void grits_plugin_radar_init(GritsPluginRadar *self)
 735 {
 736         g_debug("GritsPluginRadar: class_init");
 737         /* Set defaults */
 738         self->sites_http = grits_http_new(G_DIR_SEPARATOR_S
 739                         "nexrad" G_DIR_SEPARATOR_S
 740                         "level2" G_DIR_SEPARATOR_S);
 741         self->conus_http = grits_http_new(G_DIR_SEPARATOR_S
 742                         "nexrad" G_DIR_SEPARATOR_S
 743                         "conus"  G_DIR_SEPARATOR_S);
 744         self->sites      = g_hash_table_new_full(g_str_hash, g_str_equal,
 745                                 NULL, (GDestroyNotify)radar_site_free);
 746         self->config     = gtk_notebook_new();
 747
 748         /* Load colormaps */
 749         for (int i = 0; colormaps[i].file; i++) {
 750                 gchar *file = g_build_filename(PKGDATADIR,
 751                                 "colors", colormaps[i].file, NULL);
 752                 _load_colormap(file, &colormaps[i]);
 753                 g_free(file);
 754         }
 755
 756         /* Need to position on the top because of Win32 bug */
 757         gtk_notebook_set_tab_pos(GTK_NOTEBOOK(self->config), GTK_POS_LEFT);
 758 }
 759 static void grits_plugin_radar_dispose(GObject *gobject)
 760 {
 761         g_debug("GritsPluginRadar: dispose");
 762         GritsPluginRadar *self = GRITS_PLUGIN_RADAR(gobject);
 763         g_signal_handler_disconnect(self->config, self->tab_id);
 764         grits_viewer_remove(self->viewer, self->hud);
 765         radar_conus_free(self->conus);
 766         /* Drop references */
 767         G_OBJECT_CLASS(grits_plugin_radar_parent_class)->dispose(gobject);
 768 }
 769 static void grits_plugin_radar_finalize(GObject *gobject)
 770 {
 771         g_debug("GritsPluginRadar: finalize");
 772         GritsPluginRadar *self = GRITS_PLUGIN_RADAR(gobject);
 773         /* Free data */
 774         grits_http_free(self->conus_http);
 775         grits_http_free(self->sites_http);
 776         g_hash_table_destroy(self->sites);
 777         gtk_widget_destroy(self->config);
 778         G_OBJECT_CLASS(grits_plugin_radar_parent_class)->finalize(gobject);
 779
 780 }
 781 static void grits_plugin_radar_class_init(GritsPluginRadarClass *klass)
 782 {
 783         g_debug("GritsPluginRadar: class_init");
 784         GObjectClass *gobject_class = (GObjectClass*)klass;
 785         gobject_class->dispose  = grits_plugin_radar_dispose;
 786         gobject_class->finalize = grits_plugin_radar_finalize;
 787 }