auto import from //depot/cupcake/@135843
diff --git a/contrib/pngminus/pngminus.bat b/contrib/pngminus/pngminus.bat
new file mode 100644
index 0000000..911bb8d
--- /dev/null
+++ b/contrib/pngminus/pngminus.bat
@@ -0,0 +1,4 @@
+make -f makefile.tc3
+call png2pnm.bat
+call pnm2png.bat
+