set-stipple in brush%

Sets or removes the stipple bitmap, where #f removes the stipple. See brush% for information about drawing with stipples.

A bitmap cannot be used as a stipple if it is selected into a bitmap-dc% object; if the given bitmap is selected into a bitmap-dc% object, an exn:fail:contract exception is raised. A brush cannot be modified if it was obtained from a brush-list% or while it is selected into a drawing context.

A pen's stipple is not used in a smoothing mode, except for a post-script-dc% (which is always in a smoothing mode).

• (send a-brush set-stipple bitmap) -> void
     bitmap : bitmap% object or #f