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diff --git a/intern/img/intern/IMG_Color.h b/intern/img/intern/IMG_Color.h
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+/**
+ * $Id$
+ * ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
+ *
+ * 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. The Blender
+ * Foundation also sells licenses for use in proprietary software under
+ * the Blender License.  See http://www.blender.org/BL/ for information
+ * about this.
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * Contributor(s): none yet.
+ *
+ * ***** END GPL/BL DUAL LICENSE BLOCK *****
+ */
+
+/**
+
+ * $Id$
+ * Copyright (C) 2001 NaN Technologies B.V.
+ * Declaration of an RGB color with red, green and blue components.
+ * Declaration of an RGBA color with red, green, blue and alpha components.
+ * Components are stored as floats.
+ * @author	Maarten Gribnau
+ * @date	March 7, 2001
+ */
+
+#ifndef _H_IMG_Color
+#define _H_IMG_Color
+
+class IMG_ColorRGBA;
+
+
+class IMG_ColorRGB {
+public:
+	/**
+	 * Constructs a color with the given values.
+	 * @param	r	requested red component of the color
+	 * @param	g	requested green component of the color
+	 * @param	b	requested blue component of the color
+	 */
+	IMG_ColorRGB(float r=0, float g=0, float b=0)
+		: m_r(r), m_g(g), m_b(b) {}
+
+	/**
+	 * Copy constructor.
+	 * @param	c	the color to copy.
+	 */
+	IMG_ColorRGB(const IMG_ColorRGB& c)
+		: m_r(c.m_r), m_g(c.m_g), m_b(c.m_b) {}
+
+	/**
+	 * Constructs a color without alpha from one with.
+	 * @param	c	the color to copy.
+	 */
+	inline IMG_ColorRGB(const IMG_ColorRGBA& c);
+
+	/** Red component of the color */
+	float m_r;
+	/** Green component of the color */
+	float m_g;
+	/** Blue component of the color */
+	float m_b;
+};
+
+
+class IMG_ColorRGBA {
+public:
+	/**
+	 * Constructs a color with the given values.
+	 * @param	r	requested red component of the color
+	 * @param	g	requested green component of the color
+	 * @param	b	requested blue component of the color
+	 * @param	a	requested alpha component of the color
+	 */
+	IMG_ColorRGBA(float r=0, float g=0, float b=0, float a=0)
+		: m_r(r), m_g(g), m_b(b), m_a(a) {}
+
+	/**
+	 * Copy constructor.
+	 * @param	c	the color to copy.
+	 */
+	IMG_ColorRGBA(const IMG_ColorRGBA& c)
+		: m_r(c.m_r), m_g(c.m_g), m_b(c.m_b), m_a(c.m_a) {}
+
+	/**
+	 * Constructs a color with alpha from one without.
+	 * @param	c	the color to copy.
+	 */
+	IMG_ColorRGBA(const IMG_ColorRGB& c)
+		: m_r(c.m_r), m_g(c.m_g), m_b(c.m_b), m_a(0) {}
+
+	/**
+	 * Blends the given color with this color.
+	 * Uses the alpha of the given color for blending.
+	 * The alpha of this color is left untouched.
+	 * @param	c	the color to blend
+	 */
+	inline void	blendColor(const IMG_ColorRGBA& c);
+
+	/** Red component of the color */
+	float m_r;
+	/** Green component of the color */
+	float m_g;
+	/** Blue component of the color */
+	float m_b;
+	/** Alpha component of the color */
+	float m_a;
+};
+
+inline IMG_ColorRGB::IMG_ColorRGB(const IMG_ColorRGBA& c)
+	: m_r(c.m_r), m_g(c.m_g), m_b(c.m_b) {}
+
+inline void	IMG_ColorRGBA::blendColor(const IMG_ColorRGBA& c)
+{
+	float r1 = 1 - c.m_a; // The reverse of alpha
+#if IMG_REVERSED_ALPHA
+	m_r = c.m_a * m_r + r1 * c.m_r;
+	m_g = c.m_a * m_g + r1 * c.m_g;
+	m_b = c.m_a * m_b + r1 * c.m_b;
+#else
+	m_r = r1 * m_r + c.m_a * c.m_r;
+	m_g = r1 * m_g + c.m_a * c.m_g;
+	m_b = r1 * m_b + c.m_a * c.m_b;
+#endif
+}
+
+
+#endif // _H_IMG_Color
+\ No newline at end of file