1 files changed, 47 insertions, 0 deletions
diff --git a/engines/sludge/colours.h b/engines/sludge/colours.h
new file mode 100644
index 0000000000..503823fa27
--- /dev/null
+++ b/engines/sludge/colours.h
@@ -0,0 +1,47 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef SLUDGE_COLOURS_H
+#define SLUDGE_COLOURS_H
+
+// Simple colour conversion routines to deal with 16-bit graphics
+//unsigned short int makeColour (byte r, byte g, byte b);
+
+inline unsigned short redValue(unsigned short c) {
+	return (c >> 11) << 3;
+}
+inline unsigned short greenValue(unsigned short c) {
+	return ((c >> 5) & 63) << 2;
+}
+inline unsigned short blueValue(unsigned short c) {
+	return (c & 31) << 3;
+}
+
+inline unsigned short makeGrey(unsigned short int r) {
+	return ((r >> 3) << 11) | ((r >> 2) << 5) | (r >> 3);
+}
+
+inline unsigned short makeColour(unsigned short int r, unsigned short int g, unsigned short int b) {
+	return ((r >> 3) << 11) | ((g >> 2) << 5) | (b >> 3);
+}
+
+#endif