File content as of revision 7:58623ad7f310:

#include <mbed.h>

#ifndef __included_colors_h
#define __included_colors_h

//! Color Functions
class Colors
{
public :
    /**
     * Converts the components of a color, as specified by the HSB
     * model, to an equivalent set of values for the default RGB model.
     * <p>
     * The <code>saturation</code> and <code>brightness</code> components
     * should be floating-point values between zero and one
     * (numbers in the range 0.0-1.0).  The <code>hue</code> component
     * can be any floating-point number.  The floor of this number is
     * subtracted from it to create a fraction between 0 and 1.  This
     * fractional number is then multiplied by 360 to produce the hue
     * angle in the HSB color model.
     * <p>
     * The integer that is returned by <code>HSBtoRGB</code> encodes the
     * value of a color in bits 0-23 of an integer value that is the same
     * format used by the method {@link #getRGB() <code>getRGB</code>}.
     * This integer can be supplied as an argument to the
     * <code>Color</code> constructor that takes a single integer argument.
     * @param     hue   the hue component of the color
     * @param     saturation   the saturation of the color
     * @param     brightness   the brightness of the color
     * @return    the RGB value of the color with the indicated hue,
     *                            saturation, and brightness.
     */
    static void HSBtoRGB(float hue, float saturation, float brightness, uint8_t *pr, uint8_t *pg, uint8_t *pb);

    /**
     * Converts the components of a color, as specified by the default RGB
     * model, to an equivalent set of values for hue, saturation, and
     * brightness that are the three components of the HSB model.
     * <p>
     * If the <code>hsbvals</code> argument is <code>null</code>, then a
     * new array is allocated to return the result. Otherwise, the method
     * returns the array <code>hsbvals</code>, with the values put into
     * that array.
     * @param     r   the red component of the color
     * @param     g   the green component of the color
     * @param     b   the blue component of the color
     * @param     hsbvals  the array used to return the
     *                     three HSB values, or <code>null</code>
     * @return    an array of three elements containing the hue, saturation,
     *                     and brightness (in that order), of the color with
     *                     the indicated red, green, and blue components.
     */
    static float* RGBtoHSB(uint8_t r, uint8_t g, uint8_t b, float* hsbvals);

};

#endif