add png output for screenshots

[rigol] / .gitignore

diff --git a/.gitignore b/.gitignore
index b8d6cba9a78ea754ddb11f919e6a8a9c9d17a8c7..7dae92ce3a6209a81413154d1003be34fe6c5bed 100644 (file)
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@ raw2gp
 rigol
 rigol.o
 png.o
+screen_*.png