From 081c77f6bdb55c277bea2603a99dda5eabecd914 Mon Sep 17 00:00:00 2001
From: Jon Evans <jon@craftyjon.com>
Date: Thu, 29 Mar 2018 22:13:38 -0400
Subject: [PATCH] OPENGL_GAL::DrawSegment(): Enforce nonzero width to match
 Cairo

Fixes: lp:1759958
* https://bugs.launchpad.net/kicad/+bug/1759958
---
 common/gal/opengl/opengl_gal.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/common/gal/opengl/opengl_gal.cpp b/common/gal/opengl/opengl_gal.cpp
index e15d371d3d..0c99858d00 100644
--- a/common/gal/opengl/opengl_gal.cpp
+++ b/common/gal/opengl/opengl_gal.cpp
@@ -422,6 +422,10 @@ void OPENGL_GAL::DrawSegment( const VECTOR2D& aStartPoint, const VECTOR2D& aEndP
     VECTOR2D startEndVector = aEndPoint - aStartPoint;
     double   lineAngle      = startEndVector.Angle();
 
+    // Width must be nonzero for anything to appear
+    if( aWidth <= 0 )
+        aWidth = 1.0;
+
     if( isFillEnabled )
     {
         // Filled tracks