6.2  bitmap%

A bitmap% object is a pixel-based image, either monochrome or color.

Sometimes, a bitmap object creation fails in a low-level manner. In that case, the ok? method returns #f, and the bitmap cannot be supplied to methods that consume or operate on bitmaps (otherwise, an exn:application:mismatch exception is raised).

Methods
    get-depth
    get-height
    get-loaded-mask
    get-width
    is-color?
    load-file
    ok?
    save-file
    set-loaded-mask