From 207fd04587e7d354c9b98453b01cc0825b2ba556 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Fri, 5 Dec 2014 09:00:36 -0500
Subject: [PATCH] include alpha-delta computation in HSV::delta()

---
 libs/canvas/colors.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libs/canvas/colors.cc b/libs/canvas/colors.cc
index b053e2d1de..361023d300 100644
--- a/libs/canvas/colors.cc
+++ b/libs/canvas/colors.cc
@@ -376,6 +376,7 @@ HSV::delta (const HSV& other) const
 		d.s = s - other.s;
 		d.v = v - other.v;
 	}
+	d.a = a - other.a;
 	/* do not clamp - we are returning a delta */
 	return d;
 }