98 lines
2.6 KiB
Factor
98 lines
2.6 KiB
Factor
! Copyright (C) 2009 Doug Coleman.
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! See http://factorcode.org/license.txt for BSD license.
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USING: kernel accessors grouping sequences combinators
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math specialized-arrays.direct.uint byte-arrays fry
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specialized-arrays.direct.ushort specialized-arrays.uint
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specialized-arrays.ushort specialized-arrays.float ;
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IN: images
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SINGLETONS: BGR RGB BGRA RGBA ABGR ARGB RGBX XRGB BGRX XBGR
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R16G16B16 R32G32B32 R16G16B16A16 R32G32B32A32 ;
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: bytes-per-pixel ( component-order -- n )
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{
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{ BGR [ 3 ] }
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{ RGB [ 3 ] }
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{ BGRA [ 4 ] }
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{ RGBA [ 4 ] }
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{ ABGR [ 4 ] }
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{ ARGB [ 4 ] }
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{ RGBX [ 4 ] }
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{ XRGB [ 4 ] }
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{ BGRX [ 4 ] }
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{ XBGR [ 4 ] }
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{ R16G16B16 [ 6 ] }
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{ R32G32B32 [ 12 ] }
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{ R16G16B16A16 [ 8 ] }
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{ R32G32B32A32 [ 16 ] }
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} case ;
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TUPLE: image dim component-order upside-down? bitmap ;
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: <image> ( -- image ) image new ; inline
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GENERIC: load-image* ( path tuple -- image )
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: add-dummy-alpha ( seq -- seq' )
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3 <groups> [ 255 suffix ] map concat ;
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: normalize-floats ( byte-array -- byte-array )
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byte-array>float-array [ 255.0 * >integer ] B{ } map-as ;
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GENERIC: normalize-component-order* ( image component-order -- image )
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: normalize-component-order ( image -- image )
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dup component-order>> '[ _ normalize-component-order* ] change-bitmap ;
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M: RGBA normalize-component-order* drop ;
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M: R32G32B32A32 normalize-component-order*
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drop normalize-floats ;
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M: R32G32B32 normalize-component-order*
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drop normalize-floats add-dummy-alpha ;
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: RGB16>8 ( bitmap -- bitmap' )
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byte-array>ushort-array [ -8 shift ] B{ } map-as ; inline
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M: R16G16B16A16 normalize-component-order*
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drop RGB16>8 ;
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M: R16G16B16 normalize-component-order*
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drop RGB16>8 add-dummy-alpha ;
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: BGR>RGB ( bitmap bytes-per-pixel -- pixels )
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<groups> [ 3 cut [ reverse ] dip append ] map B{ } join ; inline
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M: BGRA normalize-component-order*
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drop 4 BGR>RGB ;
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M: RGB normalize-component-order*
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drop add-dummy-alpha ;
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M: BGR normalize-component-order*
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drop 3 BGR>RGB add-dummy-alpha ;
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: ARGB>RGBA ( bitmap -- bitmap' )
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4 <groups> [ unclip suffix ] map B{ } join ;
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M: ARGB normalize-component-order*
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drop ARGB>RGBA ;
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M: ABGR normalize-component-order*
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drop ARGB>RGBA 4 BGR>RGB ;
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: normalize-scan-line-order ( image -- image )
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dup upside-down?>> [
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dup dim>> first 4 * '[
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_ <groups> reverse concat
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] change-bitmap
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f >>upside-down?
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] when ;
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: normalize-image ( image -- image )
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[ >byte-array ] change-bitmap
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normalize-component-order
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normalize-scan-line-order
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RGBA >>component-order ;
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