From 127b57acb9baab04014328dfbf7462d055090dc4 Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Sat, 3 Apr 2021 20:29:45 +0200
Subject: Add Luminance::value_in_foot_lamberts().

---
 src/types.cc | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'src/types.cc')

diff --git a/src/types.cc b/src/types.cc
index 44422ca9..743e7260 100644
--- a/src/types.cc
+++ b/src/types.cc
@@ -547,6 +547,20 @@ Luminance::string_to_unit (string u)
 }
 
 
+float
+Luminance::value_in_foot_lamberts () const
+{
+	switch (_unit) {
+	case Unit::CANDELA_PER_SQUARE_METRE:
+		return _value / 3.426;
+	case Unit::FOOT_LAMBERT:
+		return _value;
+	default:
+		DCP_ASSERT (false);
+	}
+}
+
+
 bool
 dcp::operator== (Luminance const& a, Luminance const& b)
 {
-- 
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