adding own colormap

[grits] / src / plugin-radar.c

diff --git a/src/plugin-radar.c b/src/plugin-radar.c
index 1000b6e5fbcc5cc01b9143013848c00135a67069..e021253f9db4409311f28c59a9aca0bd6137b69a 100644 (file)
--- a/src/plugin-radar.c
+++ b/src/plugin-radar.c
@@ -30,8 +30,9 @@
 GtkWidget *drawing;
 GtkWidget *config_body;
 static Sweep *cur_sweep = NULL;  // make this not global
-static int nred, ngreen, nblue;
-static char red[256], green[256], blue[256];
+//static int nred, ngreen, nblue;
+//static char red[256], green[256], blue[256];
+static colormap_t *colormap;
 static guint sweep_tex = 0;
 
 static AWeatherGui *gui = NULL;
@@ -40,20 +41,6 @@ static Radar *radar = NULL;
 /**************************
  * Data loading functions *
  **************************/
-/* return a GL alpha value for a radar pixle */
-static guint8 get_alpha(guint8 db)
-{
-       if (db == BADVAL) return 0;
-       if (db == RFVAL ) return 0;
-       if (db == APFLAG) return 0;
-       if (db == NOECHO) return 0;
-       if (db == 0     ) return 0;
-       if      (db > 60) return 0;
-       else if (db < 10) return 0;
-       else if (db < 25) return (db-10)*(255.0/15);
-       else              return 255;
-}
-
 /* Convert a sweep to an 2d array of data points */
 static void bscan_sweep(Sweep *sweep, guint8 **data, int *width, int *height)
 {
@@ -74,10 +61,10 @@ static void bscan_sweep(Sweep *sweep, guint8 **data, int *width, int *height)
                        //guint val   = dz_f(ray->range[bi]);
                        guint val   = ray->h.f(ray->range[bi]);
                        guint buf_i = (ri*max_bins+bi)*4;
-                       buf[buf_i+0] =   red[val];
-                       buf[buf_i+1] = green[val];
-                       buf[buf_i+2] =  blue[val];
-                       buf[buf_i+3] = get_alpha(val);
+                       buf[buf_i+0] = colormap->data[val][0];
+                       buf[buf_i+1] = colormap->data[val][1];
+                       buf[buf_i+2] = colormap->data[val][2];
+                       buf[buf_i+3] = colormap->data[val][3];
                }
        }
 
@@ -87,6 +74,13 @@ static void bscan_sweep(Sweep *sweep, guint8 **data, int *width, int *height)
        *data   = buf;
 }
 
+static void load_color_table(char *table)
+{
+       for (int i = 0; colormaps[i].name; i++)
+               if (g_str_equal(colormaps[i].name, table))
+                       colormap = &colormaps[i];
+}
+
 /* Load a sweep as the active texture */
 static void load_sweep(Sweep *sweep)
 {
@@ -129,6 +123,7 @@ static void load_radar_gui(Radar *radar)
                        char *label = g_strdup_printf("Tilt: %.2f (%s)", sweep->h.elev, vol->h.type_str);
                        button = gtk_radio_button_new_with_label_from_widget(GTK_RADIO_BUTTON(button), label);
                        g_object_set(button, "draw-indicator", FALSE, NULL);
+                       g_signal_connect_swapped(button, "clicked", G_CALLBACK(load_color_table), vol->h.type_str);
                        g_signal_connect_swapped(button, "clicked", G_CALLBACK(load_sweep), sweep);
                        gtk_box_pack_start(GTK_BOX(vbox), button, FALSE, TRUE, 0);
                        g_free(label);
@@ -157,13 +152,6 @@ static void load_radar_rsl(GPid pid, gint status, gpointer _path)
                return;
        }
 
-       /* TODO: replace this with a better color table */
-       g_message("loading color table");
-       RSL_load_refl_color_table();
-       RSL_get_color_table(RSL_RED_TABLE,   red,   &nred);
-       RSL_get_color_table(RSL_GREEN_TABLE, green, &ngreen);
-       RSL_get_color_table(RSL_BLUE_TABLE,  blue,  &nblue);
-
        /* Load the first sweep by default */
        if (radar->h.nvolumes < 1 || radar->v[0]->h.nsweeps < 1) {
                g_warning("No sweeps found\n");
@@ -173,6 +161,7 @@ static void load_radar_rsl(GPid pid, gint status, gpointer _path)
                        if (radar->v[vi]== NULL) continue;
                        for (int si = 0; si < radar->v[vi]->h.nsweeps; si++) {
                                if (radar->v[vi]->sweep[si]== NULL) continue;
+                               load_color_table(radar->v[vi]->h.type_str);
                                load_sweep(radar->v[vi]->sweep[si]);
                                break;
                        }
@@ -271,12 +260,15 @@ static gboolean expose(GtkWidget *da, GdkEventExpose *event, gpointer user_data)
        glMatrixMode(GL_PROJECTION); glPushMatrix(); glLoadIdentity();
        glBegin(GL_QUADS);
        int i;
-       for (i = 0; i < nred; i++) {
-               glColor4ub(red[i], green[i], blue[i], get_alpha(i));
-               glVertex3f(-1.0, (float)((i  ) - nred/2)/(nred/2), 0.0); // bot left
-               glVertex3f(-1.0, (float)((i+1) - nred/2)/(nred/2), 0.0); // top left
-               glVertex3f(-0.9, (float)((i+1) - nred/2)/(nred/2), 0.0); // top right
-               glVertex3f(-0.9, (float)((i  ) - nred/2)/(nred/2), 0.0); // bot right
+       for (i = 0; i < 256; i++) {
+               glColor4ub(colormap->data[i][0],
+                          colormap->data[i][1],
+                          colormap->data[i][2],
+                          colormap->data[i][3]);
+               glVertex3f(-1.0, (float)((i  ) - 256/2)/(256/2), 0.0); // bot left
+               glVertex3f(-1.0, (float)((i+1) - 256/2)/(256/2), 0.0); // top left
+               glVertex3f(-0.9, (float)((i+1) - 256/2)/(256/2), 0.0); // top right
+               glVertex3f(-0.9, (float)((i  ) - 256/2)/(256/2), 0.0); // bot right
        }
        glEnd();
        glEnable(GL_DEPTH_TEST);