#ifndef COLORS_H
#define COLORS_H

#include <gtk/gtk.h> /* for guchar */

void compute_ref();

/* Input:  RBG point in range 0-255
   Output: H S L values in range 0-255 */
void point_rgb2hsl( guchar *R, guchar *G, guchar *B, guchar *h, guchar *s, guchar *l );

/* Input:  RBG point in range 0-255
   Output: X Y Z values in range 0-1 */
void point_rgb2xyz_normalized( guchar *R, guchar *G, guchar *B, float *x, float *y, float *z );

/* Input:  RBG point in range 0-255
   Output: X Y Z values in range 0-255 */
void point_rgb2xyz( guchar *R, guchar *G, guchar *B, guchar *x, guchar *y, guchar *z );

/* Input: X Y Z values in range 0-1
   Output: U V values in range 0-1 */
void xyz_normalized2uv_prime_normalized( float *x, float *y, float *z, float *u, float *v);

/* Input: X Y Z values in range 0-1 
   Output: U V values in range 0-1 */
void xyz_normalized2uv_normalized( float *x, float *y, float *z, float *l_star, float *u, float *v);

/* Input: X Y Z values in range 0-1
   Output: A B values in range 0-1 */
void xyz_normalized2ab_normalized( float *x, float *y, float *z, float *a, float *b);

/* Input: X Y Z values in range 0-1
   Output: l-star values in range 0-1 */
void xyz_normalized2l_star_normalized(float *x, float *y, float *z, float *l_star);

/* Input: one values of X Y Z in range 0-1
   Output: ? */
void partial_lab_function( float *coord, float *ref, float *funct);

/*Input: RGB point in range 0-255
  Output: LUV point in range 0-255*/
void point_rgb2luv( guchar *R, guchar *G, guchar *B, guchar *l_star, guchar *u, guchar *v );

/*Input: RGB point in range 0-255
  Output: LAB point in range 0-255*/
void point_rgb2lab( guchar *R, guchar *G, guchar *B, guchar *l_star, guchar *a, guchar *b );

void point_rgb2hslxyzluvab( guchar *R, guchar *G, guchar *B, guchar *h, guchar *s, guchar *l, guchar *x, guchar *y, guchar *z, guchar *l_star, guchar *u_star, guchar *v_star, guchar *a_star, guchar *b_star );

#endif /* COLORS_H */