blackPointCompensation
/UseBlackPtComp of ISO 32000-2, 8.4.5: true for /ON, false for /OFF and /Default, as MuPDF reads it, or null when the dictionary does not set it.
/UseBlackPtComp of ISO 32000-2, 8.4.5: true for /ON, false for /OFF and /Default, as MuPDF reads it, or null when the dictionary does not set it.