From 25f6e2c1ed3201550f1c6c8a80c1d24f24d015af Mon Sep 17 00:00:00 2001
From: Matthias Kramm <kramm@quiss.org>
Date: Thu, 31 Mar 2011 12:38:23 -0700
Subject: [PATCH] dashpattern 0/0 now makes lines invisible

---
 lib/pdf/VectorGraphicOutputDev.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/pdf/VectorGraphicOutputDev.cc b/lib/pdf/VectorGraphicOutputDev.cc
index 8c1b3af1..715aa8f8 100644
--- a/lib/pdf/VectorGraphicOutputDev.cc
+++ b/lib/pdf/VectorGraphicOutputDev.cc
@@ -517,6 +517,11 @@ void VectorGraphicOutputDev::strokeGfxline(GfxState *state, gfxline_t*line, int
             warnfeature("non-ortogonally dashed strokes", 0);
         double f = (d1+d2)/2;
 
+        if(!dashStart && dashLength==1 && !dashPattern[0]) {
+            // zero phase and zero dashlength make the line invisible
+            return;
+        }
+
 	msg("<trace> %d dashes", dashLength);
 	msg("<trace> |  phase: %f", dashStart);
 	for(t=0;t<dashLength;t++) {
-- 
2.11.4.GIT