GODOT IS OPEN SOURCE

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diff --git a/core/color.h b/core/color.h
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+/*************************************************************************/
+/*  color.h                                                              */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                    http://www.godotengine.org                         */
+/*************************************************************************/
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                 */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef COLOR_H
+#define COLOR_H
+
+#include "ustring.h"
+/**
+	@author Juan Linietsky <reduzio@gmail.com>
+*/
+struct Color {
+
+	union {
+	
+		struct {
+			float r;
+			float g;
+			float b;
+			float a;
+		};		
+		float components[4];
+	};
+
+	bool operator==(const Color &p_color) const { return (r==p_color.r && g==p_color.g && b==p_color.b && a==p_color.a ); }
+	bool operator!=(const Color &p_color) const { return (r!=p_color.r || g!=p_color.g || b!=p_color.b || a!=p_color.a ); }
+
+	uint32_t to_32() const;
+	uint32_t to_ARGB32() const;
+	float gray() const;
+	float get_h() const;
+	float get_s() const;
+	float get_v() const;
+	void set_hsv(float p_h, float p_s, float p_v, float p_alpha=1.0);
+
+	_FORCE_INLINE_ float& operator[](int idx) { 
+		return components[idx];
+	}
+	_FORCE_INLINE_ const float& operator[](int idx) const { 
+		return components[idx];
+	}
+		
+	void invert();
+	void contrast();
+	Color inverted() const;
+	Color contrasted() const;
+
+	_FORCE_INLINE_ Color linear_interpolate(const Color& p_b, float p_t) const {
+	
+		Color res=*this;
+	
+		res.r+= (p_t * (p_b.r-r));
+		res.g+= (p_t * (p_b.g-g));
+		res.b+= (p_t * (p_b.b-b));
+		res.a+= (p_t * (p_b.a-a));
+	
+		return res;	
+	}
+
+	_FORCE_INLINE_ Color blend(const Color& p_over) const {
+
+
+		Color res;
+		float sa = 1.0 - p_over.a;
+		res.a = a*sa+p_over.a;
+		if (res.a==0) {
+			return Color(0,0,0,0);
+		} else {
+			res.r = (r*a*sa + p_over.r * p_over.a)/res.a;
+			res.g = (g*a*sa + p_over.g * p_over.a)/res.a;
+			res.b = (b*a*sa + p_over.b * p_over.a)/res.a;
+		}
+		return res;
+	}
+
+	static Color hex(uint32_t p_hex);
+	static Color html(const String& p_color);
+	static bool html_is_valid(const String& p_color);
+	String to_html(bool p_alpha=true) const;
+
+	_FORCE_INLINE_ bool operator<(const Color& p_color) const; //used in set keys
+	operator String() const;
+
+	/**
+	 * No construct parameters, r=0, g=0, b=0. a=255
+	 */
+	_FORCE_INLINE_ Color() {
+		r=0; g=0; b=0; a=1.0;
+	}
+
+	/**
+	 * RGB / RGBA construct parameters. Alpha is optional, but defaults to 1.0
+	 */
+	_FORCE_INLINE_ Color(float p_r,float p_g,float p_b,float p_a=1.0) { r=p_r; g=p_g; b=p_b; a=p_a; }
+};
+
+bool Color::operator<(const Color& p_color) const {
+
+	if (r==p_color.r) {
+		if (g==p_color.g) {
+			if(b==p_color.b) {
+				return (a<p_color.a);
+			} else
+				return (b<p_color.b);
+		} else
+			return g<p_color.g;
+	} else
+		return r<p_color.r;
+
+}
+
+#endif