bitmap-mule って何?

auto-autoloads.el

(require 'bitmap)

(add-hook 'emacs-startup-hook
      (lambda ()
        (let ((flst (w32-font-list))
          (bitmap (cdr (car
                (mw32-convert-font-request-alist  
                 `((spec
                    ((:char-spec bitmap :height any :weight any :slant any)
                     strict
                     (bdf-font ,(expand-file-name "../packages/fonts/bitmap/bitmap16.bdf" 
                                  data-directory)))))))))
          fset info spec len)
          (while (setq fset (car flst))
        (setq flst (cdr flst))
        (setq info (w32-get-font-info fset))
        (when (setq spec (assq 'spec info))
          (setq len (length spec))
          (setcdr (nthcdr (1- len) spec) bitmap))
        (w32-change-font-attribute-internal fset info)))))