From 5d252639fa5f04fefbd346a6bf4c9213de621044 Mon Sep 17 00:00:00 2001
From: jean-pierre charras <jp.charras@wanadoo.fr>
Date: Fri, 30 Jun 2017 18:36:26 +0200
Subject: [PATCH] Refinement in Gerber drill file: add
 %TF.FilePolarity,Positive*% in header.

---
 pcbnew/exporters/gendrill_gerber_writer.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/pcbnew/exporters/gendrill_gerber_writer.cpp b/pcbnew/exporters/gendrill_gerber_writer.cpp
index 6d412dbc72..8fcf44a7cb 100644
--- a/pcbnew/exporters/gendrill_gerber_writer.cpp
+++ b/pcbnew/exporters/gendrill_gerber_writer.cpp
@@ -207,11 +207,15 @@ int GERBER_WRITER::createDrillFile( wxString& aFullFilename, bool aIsNpth,
 
     // else: empty file.
 
-    // End of attribute:
+    // End of .FileFunction attribute:
     text << "*%";
 
     plotter.AddLineToHeader( text );
 
+    // Add file polarity (positive)
+    text = "%TF.FilePolarity,Positive*%";
+    plotter.AddLineToHeader( text );
+
     if( !plotter.OpenFile( aFullFilename ) )
         return -1;