;(define-enum GdkImlibMode
;  (plain-palette RT_PLAIN_PALETTE)
;  (plain-palette-fast RT_PLAIN_PALETTE_FAST)
;  (dither-palette RT_DITHER_PALETTE)
;  (dither-palette-fast RT_DITHER_PALETTE_FAST)
;  (plain-truecol RT_PLAIN_TRUECOL)
;  (dither-truecol RT_DITHER_TRUECOL))