#ifndef COLOURSPACE_H_INCLUDED
#define COLOURSPACE_H_INCLUDED

#ifdef __cplusplus
extern "C" {
#endif

/**
 * Convert linear sRGB quantities to nonlinear sRGB R'G'B' in [0,1].
 */
void linear_to_nonlinear_srgb( double   r, double   g, double   b,
                               double *rp, double *gp, double *bp );

/**
 * Convert nonlinear sRGB R'G'B' to linear sRGB in [0,1].
 */
void nonlinear_to_linear_srgb( double rp, double gp, double bp,
                               double *r, double *g, double *b );

/**
 * Convert ITU-R BT.709 quantities to nonlinear R'G'B' in [0,1].
 */
void linear_to_nonlinear_rec709( double   r, double   g, double   b,
                                 double *rp, double *gp, double *bp );

/**
 * Convert ITU-R BT.709 nonlinear R'G'B' to linear RGB in [0,1].
 */
void nonlinear_to_linear_rec709( double rp, double gp, double bp,
                                 double *r, double *g, double *b );

/**
 * Convert linear ITU-R BT.709 RGB to CIE XYZ in [0,1].
 */
void rgb_to_xyz_rec709( double  r, double  g, double  b,
                        double *x, double *y, double *z );

/**
 * Convert CIE XYZ to linear ITU-R BT.709 RGB in [0,1].
 */
void xyz_to_rgb_rec709( double  x, double  y, double  z,
                        double *r, double *g, double *b );

/**
 * Convert linear sRGB to CIE XYZ in [0,1].
 */
void srgb_to_xyz( double  r, double  g, double  b,
                  double *x, double *y, double *z );

/**
 * Convert CIE XYZ to linear ITU-R BT.709 RGB in [0,1].
 */
void xyz_to_srgb( double  x, double  y, double  z,
                  double *r, double *g, double *b );

/**
 * Convert linear ITU-R BT.709 RGB to fake-L*a*b* for interpolations.
 */
void rgb_to_fakelab_rec709( double r, double g, double b,
                            double *lstar, double *astar, double *bstar );

/**
 * Convert fake-L*a*b* back to linear ITU-R BT.709 RGB.
 */
void fakelab_to_rgb_rec709( double lstar, double astar, double bstar,
                            double *r, double *g, double *b );

/**
 * Convert from xyY-space to XYZ coordinates.
 */
void xyy_to_xyz( double x, double y, double Y,
                 double *rx, double *ry, double *rz );

/**
 * Convert from u'v'Y-space to XYZ coordinates.
 */
void uvy_to_xyz( double up, double vp, double Y,
                 double *rx, double *ry, double *rz );

/**
 * Gamut maps (using saturation) a negative-valued RGB triple, assuming
 * (1,1,1) as the white point.
 */
void closest_in_gamut_srgb( double r, double g, double b,
                            double wr, double wg, double wb,
                            double *ri, double *gi, double *bi );

#ifdef __cplusplus
};
#endif

#endif /* COLOURSPACE_H_INCLUDED */