[Libreoffice] [PATCH] fdo#44576 libvisio: arrow heads not scaled with line weight

[Bruno Girin]

Hi,

Here's a simple patch to scale arrow heads with stroke width when 
reading a Visio file. The scaling factor is calculated to be close to 
2.54*strokeWidth while tending to 0.1 when strokeWidth tends to 0.

Cheers,

Bruno

>From fc8f6fd56de47d5b2026ad34072977748c4c9d30 Mon Sep 17 00:00:00 2001
From: Bruno Girin <brunogi...@gmail.com>
Date: Sat, 28 Jan 2012 14:52:03 +0000
Subject: [PATCH] Fix for ticket 44576

---
 src/lib/VSDXContentCollector.cpp |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/lib/VSDXContentCollector.cpp b/src/lib/VSDXContentCollector.cpp
index fa1d5cf..2a4b36f 100644
--- a/src/lib/VSDXContentCollector.cpp
+++ b/src/lib/VSDXContentCollector.cpp
@@ -453,13 +453,13 @@ void libvisio::VSDXContentCollector::_lineProperties(double strokeWidth, Colour
   {
     m_styleProps.insert("draw:marker-start-viewbox", "0 0 20 30");
     m_styleProps.insert("draw:marker-start-path", "m10 0-10 30h20z");
-    m_styleProps.insert("draw:marker-start-width", m_scale*0.118);
+    m_styleProps.insert("draw:marker-start-width", m_scale*(0.1/(strokeWidth*strokeWidth+1)+2.54*strokeWidth));
   }
   if (endMarker > 0)
   {
     m_styleProps.insert("draw:marker-end-viewbox", "0 0 20 30");
     m_styleProps.insert("draw:marker-end-path", "m10 0-10 30h20z");
-    m_styleProps.insert("draw:marker-end-width", m_scale*0.118);
+    m_styleProps.insert("draw:marker-end-width", m_scale*(0.1/(strokeWidth*strokeWidth+1)+2.54*strokeWidth));
   }
 }
 
-- 
1.7.5.4

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