TroughFactor      912 magick/decorate.c         GetPixelRed(q)*TroughFactor+(MagickRealType) background*
TroughFactor      913 magick/decorate.c         (QuantumRange-TroughFactor))));
TroughFactor      915 magick/decorate.c         GetPixelGreen(q)*TroughFactor+(MagickRealType) background*
TroughFactor      916 magick/decorate.c         (QuantumRange-TroughFactor))));
TroughFactor      918 magick/decorate.c         GetPixelBlue(q)*TroughFactor+(MagickRealType) background*
TroughFactor      919 magick/decorate.c         (QuantumRange-TroughFactor))));