1 ! Copyright (C) 2009 Doug Coleman.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: kernel accessors grouping sequences combinators
4 math specialized-arrays.direct.uint byte-arrays ;
7 SINGLETONS: BGR RGB BGRA RGBA ABGR ARGB RGBX XRGB BGRX XBGR
10 TUPLE: image dim component-order byte-order bitmap ;
12 : <image> ( -- image ) image new ; inline
14 GENERIC: load-image* ( path tuple -- image )
16 : add-dummy-alpha ( seq -- seq' )
18 [ 255 suffix ] map concat ;
20 : normalize-component-order ( image -- image )
26 dup length 4 / <direct-uint-array>
27 [ bits>float 255.0 * >integer ] map
28 >byte-array add-dummy-alpha
33 4 <sliced-groups> dup [ [ 0 3 ] dip <slice> reverse-here ] each
36 { RGB [ [ add-dummy-alpha ] change-bitmap ] }
40 [ [ [ 0 3 ] dip <slice> reverse-here ] each ]
41 [ add-dummy-alpha ] bi
45 RGBA >>component-order ;
47 GENERIC: normalize-scan-line-order ( image -- image )
49 M: image normalize-scan-line-order ;
51 : normalize-image ( image -- image )
52 [ >byte-array ] change-bitmap
53 normalize-component-order
54 normalize-scan-line-order ;