From b9d774f746f40540ad8c60bd991e655f41f24cba Mon Sep 17 00:00:00 2001
From: nick black <dankamongmen@gmail.com>
Date: Wed, 6 Oct 2021 21:50:38 -0400
Subject: [PATCH] [intro] avoid dividing by zero without cell-pixel geometry

---
 src/demo/intro.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/demo/intro.c b/src/demo/intro.c
index ca0659d4d..6e88cea86 100644
--- a/src/demo/intro.c
+++ b/src/demo/intro.c
@@ -83,6 +83,12 @@ orcashow(struct notcurses* nc, int dimy, int dimx){
                     &cellpxy, &cellpxx, NULL, NULL);
   int odimy, odimx, scaley, scalex;
   ncvisual_blitter_geom(nc, ncv, &vopts, &odimy, &odimx, &scaley, &scalex, NULL);
+  // even if we can't do pixel output, we want her the same size as if weu
+  // *could* do pixel output. if we have no idea as to the geom, use scale.
+  if(cellpxy == 0){
+    cellpxy = scaley;
+    cellpxx = scalex;
+  }
   struct ncplane_options nopts = {
     .rows = (odimy / cellpxy) + !!(odimy % cellpxy),
     .cols = (odimx / cellpxx) + !!(odimx % cellpxx),