cmsBool  CMSEXPORT cmsIsCLUT(cmsHPROFILE hProfile, cmsUInt32Number Intent, cmsUInt32Number UsedDirection)
{
    const cmsTagSignature* TagTable;

    // For devicelinks, the supported intent is that one stated in the header
    if (cmsGetDeviceClass(hProfile) == cmsSigLinkClass) {
            return (cmsGetHeaderRenderingIntent(hProfile) == Intent);
    }

    switch (UsedDirection) {

       case LCMS_USED_AS_INPUT: TagTable = Device2PCS16; break;
       case LCMS_USED_AS_OUTPUT:TagTable = PCS2Device16; break;

       // For proofing, we need rel. colorimetric in output. Let's do some recursion
       case LCMS_USED_AS_PROOF:
           return cmsIsIntentSupported(hProfile, Intent, LCMS_USED_AS_INPUT) &&
                  cmsIsIntentSupported(hProfile, INTENT_RELATIVE_COLORIMETRIC, LCMS_USED_AS_OUTPUT);

       default:
           cmsSignalError(cmsGetProfileContextID(hProfile), cmsERROR_RANGE, "Unexpected direction (%d)", UsedDirection);
           return FALSE;
    }

    return cmsIsTag(hProfile, TagTable[Intent]);

}
cmsBool  CMSEXPORT cmsIsCLUT(cmsHPROFILE hProfile, cmsUInt32Number Intent, cmsUInt32Number UsedDirection)
{
    const cmsTagSignature* TagTable;

     
    if (cmsGetDeviceClass(hProfile) == cmsSigLinkClass) {
            return (cmsGetHeaderRenderingIntent(hProfile) == Intent);
    }

    switch (UsedDirection) {

       case LCMS_USED_AS_INPUT: TagTable = Device2PCS16; break;
       case LCMS_USED_AS_OUTPUT:TagTable = PCS2Device16; break;

        
       case LCMS_USED_AS_PROOF:
           return cmsIsIntentSupported(hProfile, Intent, LCMS_USED_AS_INPUT) &&
                  cmsIsIntentSupported(hProfile, INTENT_RELATIVE_COLORIMETRIC, LCMS_USED_AS_OUTPUT);

       default:
           cmsSignalError(cmsGetProfileContextID(hProfile), cmsERROR_RANGE, "Unexpected direction (%d)", UsedDirection);
           return FALSE;
    }

    return cmsIsTag(hProfile, TagTable[Intent]);

}