RGB <-> HSV colorspace conversion lib

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@10253 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 35 insertions, 0 deletions

diff --git a/apps/plugins/lib/rgb_hsv.h b/apps/plugins/lib/rgb_hsv.h
new file mode 100644
index 0000000..30bb206
--- /dev/null
+++ b/apps/plugins/lib/rgb_hsv.h
@@ -0,0 +1,35 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2006 Antoine Cellerier <dionoea -at- videolan -dot- org>
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#ifndef LIB_HSV_RGB_H
+#define LIB_HSV_RGB_H
+
+/***********************************************************************
+ * Colorspace transformations
+ ***********************************************************************
+ * r, g and b range from 0 to 255
+ * h ranges from 0 to 3599 (which in fact means 0.0 to 359.9).
+ *   360 is the same as 0 (it loops)
+ * s and v range from 0 to 255 (which in fact means 0.00 to 1.00)
+ ***********************************************************************/
+
+void rgb2hsv( int r, int g, int b, int *h, int *s, int *v );
+void hsv2rgb( int h, int s, int v, int *r, int *g, int *b );
+
+#endif