faderport: add 100msec (10Hz) periodic update to facilitate automation playback

[ardour.git] / libs / canvas / canvas / utils.h

diff --git a/libs/canvas/canvas/utils.h b/libs/canvas/canvas/utils.h
index 8f0e4e868ffbb82e378066d94f1d3ecbc6f53f8e..97bbfb8fb84d38f1025232c85346a75616d9da0d 100644 (file)
--- a/libs/canvas/canvas/utils.h
+++ b/libs/canvas/canvas/utils.h
@@ -1,8 +1,35 @@
+/*
+    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 <cairomm/context.h>
+
+#include "canvas/visibility.h"
 #include "canvas/types.h"
 
 namespace ArdourCanvas {
 
-extern void set_source_rgba (Cairo::RefPtr<Cairo::Context>, Color);
-       
+       extern LIBCANVAS_API void set_source_rgba (Cairo::RefPtr<Cairo::Context>, Color);
+       extern LIBCANVAS_API void set_source_rgb_a (Cairo::RefPtr<Cairo::Context>, Color, float alpha);  //override the color's alpha
+
+       extern LIBCANVAS_API void set_source_rgba (cairo_t*, Color);
+       extern LIBCANVAS_API void set_source_rgb_a (cairo_t*, Color, float alpha);  //override the color's alpha
+
+       Distance LIBCANVAS_API distance_to_segment_squared (Duple const & p, Duple const & p1, Duple const & p2, double& t, Duple& at);
 }