cmsSigVcgtTag    5449 src/cmstypes.c     { cmsSigVcgtTag,                { 1, 1, { cmsSigVcgtType},               NULL }, &SupportedTags[60]},
cmsSigVcgtTag    5030 testbed/testcms2.c             if (!cmsWriteTag(hProfile, cmsSigVcgtTag, Curves)) return 0;
cmsSigVcgtTag    5038 testbed/testcms2.c              PtrCurve = cmsReadTag(hProfile, cmsSigVcgtTag);