/*
	Copyright (C) 2005-2007 Feeling Software Inc.
	Portions of the code are:
	Copyright (C) 2005-2007 Sony Computer Entertainment America
	
	MIT License: http://www.opensource.org/licenses/mit-license.php
*/

/**
	@file FMColor.h
	The file containing the class and global functions for RBGA colors.
*/

#ifndef _FM_COLOR_H_
#define _FM_COLOR_H_

/**
	A RBGA color.
	Not used within FCollada.

	@ingroup FMath
*/
class FCOLLADA_EXPORT FMColor
{
public:
	uint8 r;	/**< The red component. */
	uint8 g;	/**< The green component. */
	uint8 b;	/**< The blue component. */
	uint8 a;	/**< The alpha component. */

	/** Creates an empty FMColor.
		The default values are non deterministic. */
	FMColor() {}

	/** Creates the FMColor with the coordinates values.
		The first three coordinates are taken from the FMVector3, where the
		first one is the x value, the second is that y, and the third is the z.
		The forth value is the \c float specified.
		@param _r The red value.
		@param _g The green value.
		@param _b The blue value.
		@param _a The alpha value. */
	FMColor(uint8 _r, uint8 _g, uint8 _b, uint8 _a = 255) { r = _r; g = _g; b = _b; a = _a; }

	/** Creates the FMColor from a color encoded into a uint32.
		The most significant byte makes up the red value. The second most
		significant makes up the green value, the third the blue, and the forth
		the alpha.
		@param hex The uint to decode the color values from. */
	FMColor(uint32 hex) { r = uint8((hex & 0xFF000000) >> 24); g = uint8((hex & 0xFF0000) >> 16); b = uint8((hex & 0xFF00) >> 8); a = uint8(hex & 0xFF); }

	/** Creates the FMColor from a list of \c floats.
		It creates the FMColor with the values specified in the \c floats, which
		range from 0.0f to 1.0f. 
		\a componentCount is used to determined how many values to take from the
		\c float array. If there are insufficient values, then it will give the
		remaining values default values. The default values are 0 for the colors
		and 255 for the alpha. It fills in the values in this order: red, green,
		blue, alpha.
		@param components The \c float array to get values from.
		@param componentCount The amount of \c float to take from the array. */
	FMColor(const float* components, uint32 componentCount);

	/** Creates a color value from a 3D vector.
		The alpha value of the color is set to the default of 255 (1.0f).
		@param v The 3D vector representing the color value. */
	FMColor(const FMVector3& v);

	/** Creates a color value from a 4D vector.
		@param v The 4D vector representing the color value. */
	FMColor(const FMVector4& v);

	/** Get this FMColor as an array of \c floats.
		It fills the first \a componentCount elements (max 4) of \c components
		with the red, green, blue, alpha values of this FMColor in that order.
		@param components The \c float array to fill.
		@param componentCount The amount of \c float to fill into the array. */
	void ToFloats(float* components, uint32 componentCount);

	/** Get the average of the three color values of this FMColor.
		@return The averages of the three colors values of this FMColor. */
	inline uint8 ComponentAverage() { return uint8((uint32(r) + uint32(g) + uint32(b)) / 3); }

	/** Get this FMColor as an array of uint8s.
		@return The \c uint8 array. */
	operator uint8*() { return &r; }
};

/** Multiplication of a scalar with the FMColor.
	@param s The scalar to multiply by.
	@param c The FMColor to multiply with.
	@return the FMColor representing the resulting color. */
inline FMColor operator*(float s, const FMColor& c) { return FMColor(uint8(c.r * s), uint8(c.g * s), uint8(c.b * s), uint8(c.a * s)); }

#endif // _FM_COLOR_H_