X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fcolour_conversion.cc;h=5ecbf4021ce4efb30f8ccb39de37eea6f127820b;hb=b6c780d3107557d452c6612d715d01e2be52dbda;hp=aacefaa05502c9202178b2637dfa7dd5dbd50df6;hpb=05654d0e1799746a9df3ccab040c92e0ed825cac;p=dcpomatic.git

diff --git a/src/lib/colour_conversion.cc b/src/lib/colour_conversion.cc
index aacefaa05..5ecbf4021 100644
--- a/src/lib/colour_conversion.cc
+++ b/src/lib/colour_conversion.cc
@@ -30,7 +30,6 @@
 
 using std::list;
 using std::string;
-using std::stringstream;
 using std::cout;
 using std::vector;
 using boost::shared_ptr;
@@ -85,6 +84,16 @@ ColourConversion::ColourConversion (cxml::NodePtr node)
 	output_gamma = node->number_child<double> ("OutputGamma");
 }
 
+boost::optional<ColourConversion>
+ColourConversion::from_xml (cxml::NodePtr node)
+{
+	if (!node->optional_node_child ("InputGamma")) {
+		return boost::optional<ColourConversion> ();
+	}
+
+	return ColourConversion (node);
+}
+
 void
 ColourConversion::as_xml (xmlpp::Node* node) const
 {