[Lcms-user] Lab profiles and PDF data

[Leonard Rosenthol]

I'm trying to get lcms to properly construct a Lab profile to match the
data for a Lab colorspace that is described in a PDF.
Logic tells me that it should just be:
* Load the XYZ values from the Lab colorspace data
* Convert XYZ to xyY
* CreateLabProfile
* Create transforms between that and the output profile, with TYPE_Lab_8
data
and then send the data into the transform...
What am I missing?!?!?
Leonard
P.S. Here is the actual code snippet to back up what I wrote
above.

{
        
CMSErrorHandler myErrorHandler;
        // create
the profile based conversions
        
cmsCIEXYZ       
labXYZ;
        
cmsCIExyY       
labWhitePoint;
        labXYZ.X =
ASFixedToDouble( whiteX );
        labXYZ.Y =
ASFixedToDouble( whiteY );
        labXYZ.Z =
ASFixedToDouble( whiteZ );
        
cmsXYZ2xyY( &labWhitePoint, &labXYZ );
        
        
mlabProfile = cmsCreateLabProfile( &labWhitePoint );
        
mGrayConverter = new ColorConverter( mLog, mlabProfile, grayProfile,
TYPE_Lab_8, TYPE_GRAY_8 );
        
mRGBConverter = new ColorConverter( mLog, mlabProfile, rgbProfile,
TYPE_Lab_8, TYPE_RGB_8, 
        
        
        
        
        
    inConverter.GetCurrentRGBIntent() );
        
mCMYKConverter = new ColorConverter( mLog, mlabProfile, cmykProfile,
TYPE_Lab_8,
       
        
        
        
        
     TYPE_CMYK_8, inConverter.GetCurrentCMYKIntent()
);
}



---------------------------------------------------------------------------
Leonard
Rosenthol                           
<
mailto:[EMAIL PROTECTED]>
Chief Technical
Officer                     
<
http://www.pdfsages.com>
PDF Sages,
Inc.                             
215-938-7080 (voice)

                                            
215-938-0880 (fax)