# HG changeset patch
# User Rik <rik@octave.org>
# Date 1551597673 28800
# Node ID 880466837c0672a2349b861d8c23e570acb169b8
# Parent  92ecc4a97b5cc521042bbf059510c30adeaac945
imshow.m: Read indexed images correctly when only file name given (bug #49137).

* imshow.m: After call to imread, check whether map is empty or not to
determine whether image is indexed.

diff -r 92ecc4a97b5c -r 880466837c06 scripts/image/imshow.m
--- a/scripts/image/imshow.m	Thu Feb 28 23:06:25 2019 +0100
+++ b/scripts/image/imshow.m	Sat Mar 02 23:21:13 2019 -0800
@@ -86,8 +86,12 @@
   ## Get the image.
   if (ischar (im))
     [im, map] = imread (im);
-    indexed = true;
-    colormap (gca, map);
+    if (isempty (map))
+      indexed = false;
+    else
+      indexed = true;
+      colormap (gca, map);
+    endif
   endif
 
   nd = ndims (im);