[nongnu] elpa/gnuplot 5a72806bac 16/17: Check if inline images are supported

[ELPA Syncer]

branch: elpa/gnuplot
commit 5a72806bac991a7dcc5a12529d4698fc01f33a8d
Author: Daniel Mendler <m...@daniel-mendler.de>
Commit: Daniel Mendler <m...@daniel-mendler.de>

    Check if inline images are supported
---
 gnuplot.el | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/gnuplot.el b/gnuplot.el
index 4f0ba77ce2..5f358d132f 100644
--- a/gnuplot.el
+++ b/gnuplot.el
@@ -321,7 +321,9 @@ Set VARIABLE to VALUE.  ARGS is optional args."
     (set variable value))
   (gnuplot--setup-comint-for-image-mode))
 
-(defcustom gnuplot-inline-image-mode 'inline
+(defcustom gnuplot-inline-image-mode (and (display-graphic-p)
+                                          (image-type-available-p 'png)
+                                          'inline)
   "Whether to display Gnuplot output in Emacs.
 
 Possible values are nil, `inline' and `dedicated'.