chickadee » macaw » low-rgb8-sub!

low-rgb-sub! float*_in1 float*_in2 float*_outprocedure
low-rgb8-sub! uchar*_in1 uchar*_in2 uchar*_outprocedure
low-hsl-sub! float-in1 float*_in2 float*_outprocedure

Low-level versions of rgb-sub etc.