- (canvas-transform-set! [canvas canvas?] [proc (or/c (-> real? real? (values integer? integer?)) #f)]) -> void?procedure
Alternatively (set! (canvas-transform [canvas canvas?]) [proc (or/c (-> real? real? (values integer? integer?)) #f)]) -> void?
Defines the active coordinate transformation for the given canvas. The given procedure must represent a linear transformation.