53 lines
1.2 KiB
Factor
53 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: ascii assocs byte-arrays io.encodings.binary io.files
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io.pathnames io.streams.byte-array kernel namespaces sequences
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strings fry ;
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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) ( type -- class )
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>lower types get ?at [ unknown-image-extension ] unless ;
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: image-class ( path -- class )
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file-extension (image-class) ;
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PRIVATE>
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! Image Decode
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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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[ binary <file-reader> ] [ image-class ] bi load-image* ;
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M: object load-image* stream>image ;
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M: byte-array load-image*
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[ binary <byte-reader> ] dip stream>image ;
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M: string load-image*
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[ binary <file-reader> ] dip stream>image ;
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M: pathname load-image*
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[ binary <file-reader> ] dip stream>image ;
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! Image Encode
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GENERIC: image>stream ( image class -- )
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: save-graphic-image ( image path -- )
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[ image-class ] [ ] bi
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binary [ image>stream ] with-file-writer ;
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