push2: parameterize and centralize colors

1 files changed, 43 insertions, 0 deletions

diff --git a/libs/surfaces/push2/utils.cc b/libs/surfaces/push2/utils.cc
new file mode 100644
index 0000000000..6227491a2f
--- /dev/null
+++ b/libs/surfaces/push2/utils.cc
@@ -0,0 +1,43 @@
+/*
+  Copyright (C) 2016 Paul Davis
+
+  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 "gtkmm2ext/rgb_macros.h"
+
+#include "utils.h"
+
+void
+set_source_rgba (Cairo::RefPtr<Cairo::Context> context, uint32_t col, bool with_alpha)
+{
+	int r, g, b, a;
+
+	UINT_TO_RGBA (col, &r, &g, &b, &a);
+
+	if (with_alpha) {
+		context->set_source_rgba (r/255.0, g/255.0, b/255.0, a/255.0);
+	} else {
+		context->set_source_rgb (r/255.0, g/255.0, b/255.0);
+	}
+}
+
+void
+set_source_rgb (Cairo::RefPtr<Cairo::Context> context, uint32_t color)
+{
+	set_source_rgba (context, color, false);
+}