alpha-channel-precedes-colors? ( object -- ? )

Vocabulary

images

Inputs and outputs

object	an object
?	a boolean

Word description

Tests if the object is an instance of the alpha-channel-precedes-colors class.

Definition

USING: kernel ;

IN: images

: alpha-channel-precedes-colors? ( object -- ? )
    dup XRGB?
    [ drop t ] [
        dup XBGR?
        [ drop t ] [ dup ARGB? [ drop t ] [ ABGR? ] if ] if
    ] if ;