Btw the output of the code during cmsTransform2DeviceLink() is:
lcms2: LUT is not suitable to be saved as LutAToB
lcms2: Couldn't write type 'mAB '
Am 06.08.10, 15:03 +0200 schrieb Kai-Uwe Behrmann:
> Any idea how to put the processing elements in the right order during
> creation of a transform from sRGB to XYZ floats?.
>
> Following code demonstrates the issue:
>
> /* gcc -Wall -g transforms.c -o transforms `pkg-config --cflags --libs lcms2`
> */
> #include <lcms2.h>
>
> void errorHandlerFunction ( cmsContext ContextID,
> cmsUInt32Number ErrorCode,
> const char * ErrorText )
> { printf( "lcms2: %s\n", ErrorText ); }
>
>
> int main(int argc, char **argv)
> {
> cmsSetLogErrorHandler( lcm2ErrorHandlerFunction );
> /* adapt profile paths to your needs */
> cmsHPROFILE p_in = cmsOpenProfileFromFile(
> "/usr/share/color/icc/sRGB.icc","rb");
> cmsHPROFILE p_out = cmsOpenProfileFromFile(
> "/usr/share/color/icc/XYZ.icc","rb");
>
> cmsUInt32Number format_in = TYPE_RGB_FLT,
> format_out = TYPE_XYZ_FLT;
> cmsHTRANSFORM xform = cmsCreateTransform( p_in, format_in,
> p_out, format_out,
> 0, 0 );
> cmsHPROFILE dl = cmsTransform2DeviceLink( xform, 4.2, 0 );
>
> if(!cmsSaveProfileToFile( dl, "sRGB-XYZ_dl.icc" ))
> printf("error in writing sRGB-XYZ_dl.icc\n");
>
> return 0;
> }
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