Hi,
I want to be able to convert an XYZ value to RGB. I took the
following steps:
- created a XYZ profile used as input.
- created a sRGB profile used as output
- intent is set to perceptual
- created a transform
- loaded the XYZ values
- did the transform
The problem is no matter what the XYZ value I always get 255 for the RGB
values. What am I doing wrong?
Thanks for any help.
void XYZtoRGB(double X, double Y, double Z, unsigned char &red, unsigned
char &green, unsigned char &blue)
cmsCIEXYZ XYZ;
BYTE output[3];
XYZ.X = X;
XYZ.Y = Y;
XYZ.Z = Z;
cmsHTRANSFORM hXYZtoRGBTransform;
cmsHPROFILE hXYZProfile;
cmsHPROFILE hsRGBProfile;
hXYZProfile = cmsCreateXYZProfile();
hsRGBProfile = cmsCreate_sRGBProfile();
// Rendering intent is perceptual
hXYZtoRGBTransform = cmsCreateTransform(hXYZProfile, TYPE_XYZ_DBL,
hsRGBProfile, TYPE_RGB_8,
0,
cmsFLAGS_NOTPRECALC);
cmsDoTransform(hXYZtoRGBTransform, &XYZ, output, 1);
red = output[0];
green = output[1];
blue = output[2];
cmsDeleteTransform(hXYZtoRGBTransform);
cmsCloseProfile(hXYZProfile);
cmsCloseProfile(hsRGBProfile);
}
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