134 void CMSEXPORT cmsXYZ2Lab(const cmsCIEXYZ* WhitePoint, cmsCIELab* Lab, const cmsCIEXYZ* xyz)  in cmsXYZ2Lab()  argument
138     if (WhitePoint == NULL)  in cmsXYZ2Lab()
139         WhitePoint = cmsD50_XYZ();  in cmsXYZ2Lab()
141     fx = f(xyz->X / WhitePoint->X);  in cmsXYZ2Lab()
142     fy = f(xyz->Y / WhitePoint->Y);  in cmsXYZ2Lab()
143     fz = f(xyz->Z / WhitePoint->Z);  in cmsXYZ2Lab()
152 void CMSEXPORT cmsLab2XYZ(const cmsCIEXYZ* WhitePoint, cmsCIEXYZ* xyz,  const cmsCIELab* Lab)  in cmsLab2XYZ()  argument
156     if (WhitePoint == NULL)  in cmsLab2XYZ()
157         WhitePoint = cmsD50_XYZ();  in cmsLab2XYZ()
163     xyz -> X = f_1(x) * WhitePoint -> X;  in cmsLab2XYZ()
164     xyz -> Y = f_1(y) * WhitePoint -> Y;  in cmsLab2XYZ()
165     xyz -> Z = f_1(z) * WhitePoint -> Z;  in cmsLab2XYZ()