QuadraticFilter    94 Magick++/demo/zoom.cpp               filter=QuadraticFilter;
QuadraticFilter   582 Magick++/lib/Magick++/Include.h   using MagickCore::QuadraticFilter;
QuadraticFilter  1106 magick/option.c     { "Quadratic", QuadraticFilter, UndefinedOptionFlag, MagickFalse },
QuadraticFilter   776 magick/resize.c     { QuadraticFilter,     BoxFilter      },  /* Quadratic Gaussian approx    */