From 2eceacbf55b5796e4449fb3efc85cffdf5b6303c Mon Sep 17 00:00:00 2001
From: Krzysztof Kosi??ski <tweenk.pl@gmail.com>
Date: Thu, 12 Aug 2010 00:40:33 +0200
Subject: Fix rendering failures caused by markers with
 markerUnits="strokeWidth" on shapes with zero stroke width

(bzr r9508.1.56)
---
 src/marker.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'src/marker.cpp')

diff --git a/src/marker.cpp b/src/marker.cpp
index 6917c0b71..f89dd2bc0 100644
--- a/src/marker.cpp
+++ b/src/marker.cpp
@@ -614,6 +614,13 @@ sp_marker_show_instance ( SPMarker *marker, NRArenaItem *parent,
                           unsigned int key, unsigned int pos,
                           Geom::Matrix const &base, float linewidth)
 {
+    // do not show marker if linewidth == 0 and markerUnits == strokeWidth
+    // otherwise Cairo will fail to render anything on the tile
+    // that contains the "degenerate" marker
+    if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH && linewidth == 0) {
+        return NULL;
+    }
+
     for (SPMarkerView *v = marker->views; v != NULL; v = v->next) {
         if (v->key == key) {
             if (pos >= v->items.size()) {
-- 
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