* Fixing some memory leaks. A few minor ones in AWeather and a major one in RSL
[grits] / src / plugin-radar.c
1 /*
2  * Copyright (C) 2009 Andy Spencer <spenceal@rose-hulman.edu>
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 #include <config.h>
19 #include <gtk/gtk.h>
20 #include <gtk/gtkgl.h>
21 #include <GL/gl.h>
22 #include <math.h>
23
24 #include "rsl.h"
25
26 #include "aweather-gui.h"
27 #include "plugin-radar.h"
28 #include "data.h"
29
30 GtkWidget *drawing;
31 GtkWidget *config_body;
32 static Sweep *cur_sweep = NULL;  // make this not global
33 //static int nred, ngreen, nblue;
34 //static char red[256], green[256], blue[256];
35 static colormap_t *colormap;
36 static guint sweep_tex = 0;
37 static Radar *radar = NULL;
38
39 static AWeatherGui *gui = NULL;
40
41 /**************************
42  * Data loading functions *
43  **************************/
44 /* Convert a sweep to an 2d array of data points */
45 static void bscan_sweep(Sweep *sweep, guint8 **data, int *width, int *height)
46 {
47         /* Calculate max number of bins */
48         int i, max_bins = 0;
49         for (i = 0; i < sweep->h.nrays; i++)
50                 max_bins = MAX(max_bins, sweep->ray[i]->h.nbins);
51
52         /* Allocate buffer using max number of bins for each ray */
53         guint8 *buf = g_malloc0(sweep->h.nrays * max_bins * 4);
54
55         /* Fill the data */
56         int ri, bi;
57         for (ri = 0; ri < sweep->h.nrays; ri++) {
58                 Ray *ray  = sweep->ray[ri];
59                 for (bi = 0; bi < ray->h.nbins; bi++) {
60                         /* copy RGBA into buffer */
61                         //guint val   = dz_f(ray->range[bi]);
62                         guint8 val   = (guint8)ray->h.f(ray->range[bi]);
63                         guint  buf_i = (ri*max_bins+bi)*4;
64                         buf[buf_i+0] = colormap->data[val][0];
65                         buf[buf_i+1] = colormap->data[val][1];
66                         buf[buf_i+2] = colormap->data[val][2];
67                         buf[buf_i+3] = colormap->data[val][3];
68                         if (val == BADVAL     || val == RFVAL      || val == APFLAG ||
69                             val == NOTFOUND_H || val == NOTFOUND_V || val == NOECHO) {
70                                 buf[buf_i+3] = 0x00; // transparent
71                         }
72                 }
73         }
74
75         /* set output */
76         *width  = max_bins;
77         *height = sweep->h.nrays;
78         *data   = buf;
79 }
80
81 static void load_color_table(char *table)
82 {
83         for (int i = 0; colormaps[i].name; i++)
84                 if (g_str_equal(colormaps[i].name, table))
85                         colormap = &colormaps[i];
86 }
87
88 /* Load a sweep as the active texture */
89 static void load_sweep(Sweep *sweep)
90 {
91         aweather_gui_gl_begin(gui);
92         cur_sweep = sweep;
93         int height, width;
94         guint8 *data;
95         bscan_sweep(sweep, &data, &width, &height);
96         glGenTextures(1, &sweep_tex);
97         glBindTexture(GL_TEXTURE_2D, sweep_tex);
98         glPixelStorei(GL_PACK_ALIGNMENT, 1);
99         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
100         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
101         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
102         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
103         g_free(data);
104         gtk_widget_queue_draw(aweather_gui_get_widget(gui, "drawing"));
105         aweather_gui_gl_end(gui);
106 }
107
108 /* Add selectors to the config area for the sweeps */
109 static void load_radar_gui(Radar *radar)
110 {
111         /* Clear existing items */
112         GtkWidget *child = gtk_bin_get_child(GTK_BIN(config_body));
113         if (child)
114                 gtk_widget_destroy(child);
115
116         GtkWidget *hbox = gtk_hbox_new(TRUE, 0);
117         GtkWidget *button = NULL;
118         int vi = 0, si = 0;
119         for (vi = 0; vi < radar->h.nvolumes; vi++) {
120                 Volume *vol = radar->v[vi];
121                 if (vol == NULL) continue;
122                 GtkWidget *vbox = gtk_vbox_new(FALSE, 0);
123                 for (si = vol->h.nsweeps-1; si >= 0; si--) {
124                         Sweep *sweep = vol->sweep[si];
125                         if (sweep == NULL) continue;
126                         char *label = g_strdup_printf("Tilt: %.2f (%s)", sweep->h.elev, vol->h.type_str);
127                         button = gtk_radio_button_new_with_label_from_widget(GTK_RADIO_BUTTON(button), label);
128                         g_object_set(button, "draw-indicator", FALSE, NULL);
129                         g_signal_connect_swapped(button, "clicked", G_CALLBACK(load_color_table), vol->h.type_str);
130                         g_signal_connect_swapped(button, "clicked", G_CALLBACK(load_sweep), sweep);
131                         gtk_box_pack_start(GTK_BOX(vbox), button, FALSE, TRUE, 0);
132                         g_free(label);
133                 }
134                 gtk_box_pack_start(GTK_BOX(hbox), vbox, TRUE, TRUE, 0);
135         }
136         gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(config_body), hbox);
137         gtk_widget_show_all(hbox);
138 }
139
140 /* Load a radar from a file */
141 static void load_radar_rsl(GPid pid, gint status, gpointer _path)
142 {
143         gchar *path = _path;
144         if (status != 0) {
145                 g_warning("wsr88ddec exited with status %d", status);
146                 return;
147         }
148         char *site = g_path_get_basename(g_path_get_dirname(path));
149         RSL_read_these_sweeps("all", NULL);
150         if (radar) {
151                 g_message("Freeing radar");
152                 RSL_free_radar(radar);
153         }
154         g_message("Allocating radar");
155         radar = RSL_wsr88d_to_radar(path, site);
156         if (radar == NULL) {
157                 g_warning("fail to load radar: path=%s, site=%s", path, site);
158                 return;
159         }
160
161         /* Load the first sweep by default */
162         if (radar->h.nvolumes < 1 || radar->v[0]->h.nsweeps < 1) {
163                 g_warning("No sweeps found\n");
164         } else {
165                 /* load first available sweep */
166                 for (int vi = 0; vi < radar->h.nvolumes; vi++) {
167                         if (radar->v[vi]== NULL) continue;
168                         for (int si = 0; si < radar->v[vi]->h.nsweeps; si++) {
169                                 if (radar->v[vi]->sweep[si]== NULL) continue;
170                                 load_color_table(radar->v[vi]->h.type_str);
171                                 load_sweep(radar->v[vi]->sweep[si]);
172                                 break;
173                         }
174                         break;
175                 }
176         }
177
178         load_radar_gui(radar);
179 }
180
181 /* decompress a radar file, then chain to the actuall loading function */
182 static void load_radar(char *path, gpointer user_data)
183 {
184         char *raw  = g_strconcat(path, ".raw", NULL);
185         if (g_file_test(raw, G_FILE_TEST_EXISTS)) {
186                 load_radar_rsl(0, 0, raw);
187         } else {
188                 char *argv[] = {"wsr88ddec", path, raw, NULL};
189                 GPid pid;
190                 GError *error = NULL;
191                 g_spawn_async(
192                         NULL,    // const gchar *working_directory,
193                         argv,    // gchar **argv,
194                         NULL,    // gchar **envp,
195                         G_SPAWN_SEARCH_PATH|
196                         G_SPAWN_DO_NOT_REAP_CHILD, 
197                                  // GSpawnFlags flags,
198                         NULL,    // GSpawnChildSetupFunc child_setup,
199                         NULL,    // gpointer user_data,
200                         &pid,    // GPid *child_pid,
201                         &error); // GError **error
202                 if (error)
203                         g_warning("failed to decompress WSR88D data: %s", error->message);
204                 g_child_watch_add(pid, load_radar_rsl, raw);
205         }
206 }
207
208 /*************
209  * Callbacks *
210  *************/
211 static gboolean expose(GtkWidget *da, GdkEventExpose *event, gpointer user_data)
212 {
213         g_message("radar:expose");
214         if (cur_sweep == NULL)
215                 return FALSE;
216         Sweep *sweep = cur_sweep;
217
218         /* Draw the rays */
219
220         glMatrixMode(GL_MODELVIEW);
221         glPushMatrix();
222         glBindTexture(GL_TEXTURE_2D, sweep_tex);
223         glEnable(GL_TEXTURE_2D);
224         glDisable(GL_ALPHA_TEST);
225         glColor4f(1,1,1,1);
226         glBegin(GL_QUAD_STRIP);
227         for (int ri = 0; ri <= sweep->h.nrays+1; ri++) {
228                 /* Do the first sweep twice to complete the last Quad */
229                 Ray *ray = sweep->ray[ri % sweep->h.nrays];
230
231                 /* right and left looking out from radar */
232                 double left  = ((ray->h.azimuth - ((double)ray->h.beam_width/2.))*M_PI)/180.0; 
233                 //double right = ((ray->h.azimuth + ((double)ray->h.beam_width/2.))*M_PI)/180.0; 
234
235                 double lx = sin(left);
236                 double ly = cos(left);
237
238                 double near_dist = ray->h.range_bin1;
239                 double far_dist  = ray->h.nbins*ray->h.gate_size + ray->h.range_bin1;
240
241                 /* (find middle of bin) / scale for opengl */
242                 // near left
243                 glTexCoord2f(0.0, (double)ri/sweep->h.nrays);
244                 glVertex3f(lx*near_dist, ly*near_dist, 2.0);
245
246                 // far  left
247                 glTexCoord2f(1.0, (double)ri/sweep->h.nrays);
248                 glVertex3f(lx*far_dist,  ly*far_dist,  2.0);
249         }
250         //g_print("ri=%d, nr=%d, bw=%f\n", _ri, sweep->h.nrays, sweep->h.beam_width);
251         glEnd();
252         glPopMatrix();
253
254         /* Texture debug */
255         //glBegin(GL_QUADS);
256         //glTexCoord2d( 0.,  0.); glVertex3f(-1.,  0., 0.); // bot left
257         //glTexCoord2d( 0.,  1.); glVertex3f(-1.,  1., 0.); // top left
258         //glTexCoord2d( 1.,  1.); glVertex3f( 0.,  1., 0.); // top right
259         //glTexCoord2d( 1.,  0.); glVertex3f( 0.,  0., 0.); // bot right
260         //glEnd();
261
262         /* Print the color table */
263         glDisable(GL_TEXTURE_2D);
264         glDisable(GL_DEPTH_TEST);
265         glMatrixMode(GL_MODELVIEW ); glPushMatrix(); glLoadIdentity();
266         glMatrixMode(GL_PROJECTION); glPushMatrix(); glLoadIdentity();
267         glBegin(GL_QUADS);
268         int i;
269         for (i = 0; i < 256; i++) {
270                 glColor4ub(colormap->data[i][0],
271                            colormap->data[i][1],
272                            colormap->data[i][2],
273                            colormap->data[i][3]);
274                 glVertex3f(-1.0, (float)((i  ) - 256/2)/(256/2), 0.0); // bot left
275                 glVertex3f(-1.0, (float)((i+1) - 256/2)/(256/2), 0.0); // top left
276                 glVertex3f(-0.9, (float)((i+1) - 256/2)/(256/2), 0.0); // top right
277                 glVertex3f(-0.9, (float)((i  ) - 256/2)/(256/2), 0.0); // bot right
278         }
279         glEnd();
280         glEnable(GL_DEPTH_TEST);
281         glEnable(GL_ALPHA_TEST);
282         glMatrixMode(GL_PROJECTION); glPopMatrix(); 
283         glMatrixMode(GL_MODELVIEW ); glPopMatrix();
284         return FALSE;
285 }
286
287 static void set_time(AWeatherView *view, char *time, gpointer user_data)
288 {
289         g_message("radar:setting time");
290         // format: http://mesonet.agron.iastate.edu/data/nexrd2/raw/KABR/KABR_20090510_0323
291         char *site = aweather_view_get_location(view);
292         char *base = "http://mesonet.agron.iastate.edu/data/";
293         char *path = g_strdup_printf("nexrd2/raw/K%s/K%s_%s", site, site, time);
294         //g_message("caching %s/%s", base, path);
295         cur_sweep = NULL; // Clear radar
296         gtk_widget_queue_draw(aweather_gui_get_widget(gui, "drawing"));
297         cache_file(base, path, load_radar, NULL);
298         g_free(path);
299 }
300
301 static void set_site(AWeatherView *view, char *site, gpointer user_data)
302 {
303         g_message("Loading wsr88d list for %s", site);
304         gchar *data;
305         gsize length;
306         GError *error = NULL;
307         char *list_uri = g_strdup_printf("http://mesonet.agron.iastate.edu/data/nexrd2/raw/K%s/dir.list", site);
308         GFile *list    = g_file_new_for_uri(list_uri);
309         g_free(list_uri);
310         cur_sweep = NULL; // Clear radar
311         gtk_widget_queue_draw(aweather_gui_get_widget(gui, "drawing"));
312         g_file_load_contents(list, NULL, &data, &length, NULL, &error);
313         if (error) {
314                 g_warning("Error loading list for %s: %s", site, error->message);
315                 return;
316         }
317         gchar **lines = g_strsplit(data, "\n", -1);
318         GtkTreeView  *tview  = GTK_TREE_VIEW(aweather_gui_get_widget(gui, "time"));
319         GtkListStore *lstore = GTK_LIST_STORE(gtk_tree_view_get_model(tview));
320         gtk_list_store_clear(lstore);
321         radar = NULL;
322         char *time = NULL;
323         for (int i = 0; lines[i] && lines[i][0]; i++) {
324                 // format: `841907 KABR_20090510_0159'
325                 //g_message("\tadding %p [%s]", lines[i], lines[i]);
326                 char **parts = g_strsplit(lines[i], " ", 2);
327                 time = parts[1]+5;
328                 GtkTreeIter iter;
329                 gtk_list_store_insert(lstore, &iter, 0);
330                 gtk_list_store_set(lstore, &iter, 0, time, -1);
331         }
332         if (time != NULL) 
333                 aweather_view_set_time(view, time);
334         g_free(data);
335         g_strfreev(lines);
336 }
337
338 /* Init */
339 gboolean radar_init(AWeatherGui *_gui)
340 {
341         gui = _gui;
342         drawing = aweather_gui_get_widget(gui, "drawing");
343         GtkNotebook    *config  = GTK_NOTEBOOK(aweather_gui_get_widget(gui, "tabs"));
344         AWeatherView   *view    = aweather_gui_get_view(gui);
345
346         /* Add configuration tab */
347         config_body = gtk_scrolled_window_new(NULL, NULL);
348         gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(config_body), gtk_label_new("No radar loaded"));
349         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(config_body), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
350         gtk_notebook_prepend_page(GTK_NOTEBOOK(config), config_body, gtk_label_new("Radar"));
351
352         /* Set up OpenGL Stuff */
353         g_signal_connect(drawing, "expose-event",     G_CALLBACK(expose),   NULL);
354         g_signal_connect(view,    "location-changed", G_CALLBACK(set_site), NULL);
355         g_signal_connect(view,    "time-changed",     G_CALLBACK(set_time), NULL);
356
357         return TRUE;
358 }