workaround/hack/fix for cairo pattern gradient space exceeding 2^16 size limit

[ardour.git] / libs / canvas / line_set.cc

diff --git a/libs/canvas/line_set.cc b/libs/canvas/line_set.cc
index 3e6866d04e956bf66c7c751f1b518ce436592eda..5aefe1bf47f76cff8c2428ab4686a79b7450a576 100644 (file)
--- a/libs/canvas/line_set.cc
+++ b/libs/canvas/line_set.cc
@@ -1,3 +1,22 @@
+/*
+    Copyright (C) 2011-2013 Paul Davis
+    Author: Carl Hetherington <cth@carlh.net>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
 #include "canvas/line_set.h"
 #include "canvas/utils.h"
 
@@ -54,8 +73,10 @@ LineSet::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
                } else if (i->y > area.y0) {
                        set_source_rgba (context, i->color);
                        context->set_line_width (i->width);
-                       context->move_to (area.x0, i->y);
-                       context->line_to (area.x1, i->y);
+                       Duple p0 = item_to_window (Duple (area.x0, i->y));
+                       Duple p1 = item_to_window (Duple (area.x1, i->y));
+                       context->move_to (p0.x, p0.y);
+                       context->line_to (p1.x, p1.y);
                        context->stroke ();
                }
        }