The include-bitmap form takes a filename containing a bitmap and “inlines” the bitmap into the program.
Historically, the advantage of inlining the bitmap is that a stand-alone executable can be created that contains the bitmap and does not refer to the original image file. The define-runtime-path form, however, now provides a better alternative.
|(include-bitmap path-spec type-expr)|
|(include-bitmap/relative-to source path-spec)|
|(include-bitmap/relative-to source path-spec [type-expr])|
Analogous to include-at/relative-to, though only a source is needed (no context).