ScaleQuantumToIndex   59 magick/image.h #  define ScaleQuantumToIndex(value)   ((unsigned char) (value))
ScaleQuantumToIndex   81 magick/image.h #  define ScaleQuantumToIndex(value)   ((unsigned short) (value))
ScaleQuantumToIndex   96 magick/image.h #  define ScaleQuantumToIndex(value)   ((unsigned short) ((value)/65537U))