From d577d991b97ae2b5ee1af23641bcffc3f83af5b2 Mon Sep 17 00:00:00 2001
From: Pixel <pixel@nobis-crew.org>
Date: Wed, 4 Nov 2009 11:56:41 -0800
Subject: Initial import. Contains the im, cd and iup librairies, and a
 "working" Makefile for them under linux.

---
 im/include/im_colorhsi.h | 56 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100755 im/include/im_colorhsi.h

(limited to 'im/include/im_colorhsi.h')

diff --git a/im/include/im_colorhsi.h b/im/include/im_colorhsi.h
new file mode 100755
index 0000000..9749002
--- /dev/null
+++ b/im/include/im_colorhsi.h
@@ -0,0 +1,56 @@
+/** \file
+ * \brief HSI Color Manipulation
+ *
+ * See Copyright Notice in im_lib.h
+ */
+
+#ifndef __IM_COLORHSI_H
+#define __IM_COLORHSI_H
+
+#if	defined(__cplusplus)
+extern "C" {
+#endif
+
+
+/** \defgroup hsi HSI Color Coordinate System Conversions
+ *
+ * \par
+ * HSI is just the RGB color space written in a different coordinate system.
+ * \par
+ * "I" is defined along the cube diagonal. It ranges from 0 (black) to 1 (white). \n
+ * HS are the polar coordinates of a plane normal to "I". \n
+ * "S" is the normal distance from the diagonal of the RGB cube. It ranges from 0 to 1. \n
+ * "H" is the angle starting from the red vector, given in degrees.
+ * \par
+ * This is not a new color space, this is exactly the same gammut as RGB. \n
+ * \par
+ * See \ref im_colorhsi.h
+ * \ingroup color */
+
+
+/** Returns I where S is maximum given H (here in radians).
+ * \ingroup hsi */
+float imColorHSI_ImaxS(float h, double cosh, double sinh);
+
+/** Converts from RGB to HSI.
+ * \ingroup hsi */
+void imColorRGB2HSI(float r, float g, float b, float *h, float *s, float *i);
+
+/** Converts from RGB (byte) to HSI.
+ * \ingroup hsi */
+void imColorRGB2HSIbyte(unsigned char r, unsigned char g, unsigned char b, float *h, float *s, float *i);
+
+/** Converts from HSI to RGB.
+ * \ingroup hsi */
+void imColorHSI2RGB(float h, float s, float i, float *r, float *g, float *b);
+
+/** Converts from HSI to RGB (byte).
+ * \ingroup hsi */
+void imColorHSI2RGBbyte(float h, float s, float i, unsigned char *r, unsigned char *g, unsigned char *b);
+
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif
-- 
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