viewdemo: add a legend. baller as fuck

src/demo/view.c

@@ -34,6 +34,31 @@ view_video_demo(struct notcurses* nc){
   return 0;
 }
 
+static struct ncplane*
+legend(struct notcurses* nc, int dimy, int dimx){
+  struct ncplane* n = notcurses_newplane(nc, 3, dimx / 5 + 10, dimy / 8, dimx / 10, NULL);
+  ncplane_set_bg_alpha(n, CELL_ALPHA_TRANS);
+  uint64_t channels = 0;
+  channels_set_bg_alpha(&channels, CELL_ALPHA_TRANS);
+  cell c = CELL_INITIALIZER(' ', 0, channels);
+  ncplane_set_default(n, &c);
+  ncplane_set_fg_rgb(n, 0, 0, 0);
+  if(ncplane_putstr_aligned(n, 0, "target launch", NCALIGN_LEFT) <= 0){
+    ncplane_destroy(n);
+    return NULL;
+  }
+  ncplane_set_fg_rgb(n, 0xff, 0xff, 0xff);
+  if(ncplane_putstr_aligned(n, 1, "2003-12-11 FM-6", NCALIGN_RIGHT) <= 0){
+    ncplane_destroy(n);
+    return NULL;
+  }
+  if(ncplane_putstr_aligned(n, 2, "RIM-161 SM-3 v. Aries TTV", NCALIGN_RIGHT) <= 0){
+    ncplane_destroy(n);
+    return NULL;
+  }
+  return n;
+}
+
 int view_demo(struct notcurses* nc){
   struct ncplane* ncp = notcurses_stdplane(nc);
   int dimy, dimx;
@@ -82,8 +107,13 @@ int view_demo(struct notcurses* nc){
     return -1;
   }
   nanosleep(&demodelay, NULL);
+  struct ncplane* ncpl = legend(nc, dimy, dimx);
+  if(ncpl == NULL){
+    return -1;
+  }
   if(view_video_demo(nc)){
     return -1;
   }
+  ncplane_destroy(ncpl);
   return 0;
 }