SubtractEvaluateOperator 542 Magick++/lib/Magick++/Include.h using MagickCore::SubtractEvaluateOperator; SubtractEvaluateOperator 1064 magick/option.c { "Subtract", SubtractEvaluateOperator, UndefinedOptionFlag, MagickFalse }, SubtractEvaluateOperator 373 magick/statistic.c case SubtractEvaluateOperator: