support predictors
Doug Coleman
parent
83834f802a
commit
b4e7592ba3
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@ -2,11 +2,12 @@
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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
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specialized-arrays.direct.ushort ;
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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 ;
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R16G16B16 R32G32B32 R16G16B16A16 R32G32B32A32 ;
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TUPLE: image dim component-order bitmap ;
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@ -18,34 +19,37 @@ GENERIC: load-image* ( path tuple -- image )
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3 <sliced-groups>
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[ 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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: normalize-component-order ( image -- image )
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dup component-order>>
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{
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{ RGBA [ ] }
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{ R32G32B32A32 [
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[ normalize-floats ] change-bitmap
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] }
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{ R32G32B32 [
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[
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dup length 4 / <direct-uint-array>
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[ bits>float 255.0 * >integer ] map
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>byte-array add-dummy-alpha
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] change-bitmap
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[ normalize-floats add-dummy-alpha ] change-bitmap
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] }
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{ R16G16B16A16 [
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[ byte-array>ushort-array [ -8 shift ] B{ } map-as ] change-bitmap
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] }
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{ R16G16B16 [
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[
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dup length 2 / <direct-ushort-array>
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[ -8 shift ] map
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>byte-array add-dummy-alpha
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byte-array>ushort-array [ -8 shift ] B{ } map-as add-dummy-alpha
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] change-bitmap
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] }
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{ BGRA [
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[
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4 <sliced-groups> dup [ [ 0 3 ] dip <slice> reverse-here ] each
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4 <sliced-groups> dup [ 3 head-slice reverse-here ] each
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] change-bitmap
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] }
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{ RGB [ [ add-dummy-alpha ] change-bitmap ] }
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{ BGR [
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[
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3 <sliced-groups>
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[ [ [ 0 3 ] dip <slice> reverse-here ] each ]
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[ [ 3 head-slice reverse-here ] each ]
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[ add-dummy-alpha ] bi
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] change-bitmap
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] }
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@ -5,7 +5,7 @@ compression.lzw constructors endian fry grouping images io
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io.binary io.encodings.ascii io.encodings.binary
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io.encodings.string io.encodings.utf8 io.files kernel math
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math.bitwise math.order math.parser pack prettyprint sequences
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strings ;
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strings math.vectors ;
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IN: images.tiff
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TUPLE: tiff-image < image ;
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@ -119,7 +119,9 @@ SINGLETONS: image-length image-width x-resolution y-resolution
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rows-per-strip strip-offsets strip-byte-counts bits-per-sample
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samples-per-pixel new-subfile-type orientation software
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date-time photoshop exif-ifd sub-ifd inter-color-profile
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xmp iptc unhandled-ifd-entry ;
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xmp iptc fill-order document-name page-number page-name
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x-position y-position
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unhandled-ifd-entry ;
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ERROR: bad-tiff-magic bytes ;
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: tiff-endianness ( byte-array -- ? )
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@ -159,6 +161,9 @@ ERROR: no-tag class ;
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: find-tag ( idf class -- tag )
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swap processed-tags>> ?at [ no-tag ] unless ;
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: tag? ( idf class -- tag )
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swap processed-tags>> key? ;
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: read-strips ( ifd -- ifd )
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dup
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[ strip-byte-counts find-tag ]
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@ -242,6 +247,8 @@ ERROR: bad-small-ifd-type n ;
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{ 258 [ bits-per-sample ] }
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{ 259 [ lookup-compression compression ] }
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{ 262 [ lookup-photometric-interpretation photometric-interpretation ] }
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{ 266 [ fill-order ] }
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{ 269 [ ascii decode document-name ] }
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{ 273 [ strip-offsets ] }
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{ 274 [ orientation ] }
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{ 277 [ samples-per-pixel ] }
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@ -250,7 +257,11 @@ ERROR: bad-small-ifd-type n ;
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{ 282 [ first x-resolution ] }
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{ 283 [ first y-resolution ] }
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{ 284 [ planar-configuration ] }
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{ 285 [ page-name ] }
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{ 286 [ x-position ] }
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{ 287 [ y-position ] }
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{ 296 [ lookup-resolution-unit resolution-unit ] }
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{ 297 [ page-number ] }
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{ 305 [ ascii decode software ] }
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{ 306 [ ascii decode date-time ] }
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{ 317 [ lookup-predictor predictor ] }
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@ -286,6 +297,27 @@ ERROR: unhandled-compression compression ;
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: strips>bitmap ( ifd -- ifd )
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dup strips>> concat >>bitmap ;
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: (strips-predictor) ( ifd -- ifd )
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[ ]
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[ image-width find-tag ]
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[ samples-per-pixel find-tag ] tri
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[ * ] keep
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'[
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_ group [ _ group [ rest ] [ first ] bi
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[ v+ ] accumulate swap suffix concat ] map
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concat >byte-array
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] change-bitmap ;
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: strips-predictor ( ifd -- ifd )
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dup predictor tag? [
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dup predictor find-tag
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{
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{ predictor-none [ ] }
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{ predictor-horizontal-differencing [ (strips-predictor) ] }
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[ bad-predictor ]
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} case
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] when ;
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ERROR: unknown-component-order ifd ;
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: fix-bitmap-endianness ( ifd -- ifd )
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@ -302,7 +334,9 @@ ERROR: unknown-component-order ifd ;
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: ifd-component-order ( ifd -- byte-order )
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bits-per-sample find-tag {
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{ { 32 32 32 32 } [ R32G32B32A32 ] }
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{ { 32 32 32 } [ R32G32B32 ] }
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{ { 16 16 16 16 } [ R16G16B16A16 ] }
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{ { 16 16 16 } [ R16G16B16 ] }
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{ { 8 8 8 8 } [ RGBA ] }
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{ { 8 8 8 } [ RGB ] }
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@ -329,6 +363,7 @@ ERROR: unknown-component-order ifd ;
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uncompress-strips
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strips>bitmap
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fix-bitmap-endianness
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strips-predictor
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drop
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] each
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] with-endianness
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