TroughFactor      895 magick/decorate.c         GetPixelRed(q)*TroughFactor+(MagickRealType) background*
TroughFactor      896 magick/decorate.c         (QuantumRange-TroughFactor))));
TroughFactor      898 magick/decorate.c         GetPixelGreen(q)*TroughFactor+(MagickRealType) background*
TroughFactor      899 magick/decorate.c         (QuantumRange-TroughFactor))));
TroughFactor      901 magick/decorate.c         GetPixelBlue(q)*TroughFactor+(MagickRealType) background*
TroughFactor      902 magick/decorate.c         (QuantumRange-TroughFactor))));