46 lines
1.2 KiB
Factor
46 lines
1.2 KiB
Factor
! Copyright (C) 2009 Doug Coleman, Daniel Ehrenberg.
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! See http://factorcode.org/license.txt for BSD license.
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USING: accessors assocs byte-arrays combinators images
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io.encodings.binary io.pathnames io.streams.byte-array
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io.streams.limited kernel namespaces splitting strings
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unicode.case sequences ;
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IN: images.loader
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ERROR: unknown-image-extension extension ;
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<PRIVATE
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SYMBOL: types
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types [ H{ } clone ] initialize
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: image-class ( path -- class )
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file-extension >lower types get ?at
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[ unknown-image-extension ] unless ;
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: open-image-file ( path -- stream )
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binary stream-throws <limited-file-reader> ;
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PRIVATE>
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GENERIC# load-image* 1 ( obj class -- image )
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GENERIC: stream>image ( stream class -- image )
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: register-image-class ( extension class -- )
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swap types get set-at ;
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: load-image ( path -- image )
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[ open-image-file ] [ image-class ] bi load-image* ;
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M: byte-array load-image*
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[
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[ binary <byte-reader> ]
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[ length stream-throws <limited-stream> ] bi
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] dip stream>image ;
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M: limited-stream load-image* stream>image ;
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M: string load-image* [ open-image-file ] dip stream>image ;
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M: pathname load-image* [ open-image-file ] dip stream>image ;
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