vertex-indexes? ( object -- ? )

Vocabulary

gpu.render

Inputs and outputs

object	an object
?	a boolean

Word description

Tests if the object is an instance of the vertex-indexes class.

Definition

USING: classes.tuple.private kernel slots.private
specialized-arrays.instances.alien.c-types.uchar
specialized-arrays.instances.alien.c-types.uint
specialized-arrays.instances.alien.c-types.ushort ;

IN: gpu.render

: vertex-indexes? ( object -- ? )
    dup tuple? [
        layout-of
        7
        slot
        dup
        \ uint-array
        eq?
        [ drop t ]
        [
            dup \ ushort-array eq?
            [ drop t ] [
                dup \ uchar-array eq?
                [ drop t ] [
                    dup \ multi-index-elements eq?
                    [ drop t ] [
                        dup \ index-elements eq?
                        ~quotation~ ~quotation~ if
                    ] if
                ] if
            ] if
        ]
        if
    ] [ drop f ] if ;