define type pixel_source_options
	keyword pxl, nonnegatable
	keyword pk, nonnegatable, default
	keyword gf, nonnegatable

define verb psfont
	image psfont
	parameter p1,label=font_file,prompt="Font Id",value(required,type=$file)
	parameter p2,label=scale,prompt="Scale",value(required,type=$number)
	parameter p3,label=font_name,prompt="Font Name",value(required)
	qualifier resolution,placement=global,nonnegatable,
			value(required,list,type=$number)
	qualifier pixel_source,placement=global,nonnegatable,default,
			value(type=pixel_source_options)
	qualifier output,placement=global,nonnegatable,
			value(required,type=$file)
	qualifier compress,placement=global,negatable,default