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shapefiles: implement save-shapes.

windows-high-dpi
John Benediktsson 2018-02-22 10:14:20 -08:00
parent 84f8449771
commit 2e69bdf17c
1 changed files with 213 additions and 2 deletions
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215
extra/shapefiles/shapefiles.factor
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@ -1,8 +1,10 @@
! Copyright (C) 2018 John Benediktsson ! Copyright (C) 2018 John Benediktsson
! See http://factorcode.org/license.txt for BSD license ! See http://factorcode.org/license.txt for BSD license
USING: accessors combinators io io.binary io.encodings.binary USING: accessors byte-arrays classes combinators io
io.files kernel math sequences ; io.binary.fast io.encodings.binary io.files
io.streams.byte-array kernel locals math math.order
math.statistics sequences sets ;
IN: shapefiles IN: shapefiles
@ -166,7 +168,216 @@ TUPLE: index offset content-length ;
2 * seek-absolute seek-input read-record 2 * seek-absolute seek-input read-record
] with-file-reader ; ] with-file-reader ;
: write-int ( n -- )
4 >le write ;
: write-double ( n -- )
double>bits 8 >le write ;
: write-point ( point -- )
[ x>> ] [ y>> ] bi [ write-double ] bi@ ;
:: update-box ( header shape -- header )
header shape points>> :> points
points [ x>> ] map minmax :> ( x-min x-max )
points [ y>> ] map minmax :> ( y-min y-max )
[ x-min [ or ] keep min ] change-x-min
[ x-max [ or ] keep max ] change-x-max
[ y-min [ or ] keep min ] change-y-min
[ y-max [ or ] keep max ] change-y-max
{ x-min y-min x-max y-max } shape box<< ;
:: update-z-range ( header shape -- header )
header shape z-array>> minmax :> ( z-min z-max )
[ z-min [ or ] keep min ] change-z-min
[ z-max [ or ] keep max ] change-z-max
{ z-min z-max } shape z-range<< ;
:: update-m-range ( header shape -- header )
header shape m-array>> minmax :> ( m-min m-max )
[ m-min [ or ] keep min ] change-m-min
[ m-max [ or ] keep max ] change-m-max
{ m-min m-max } shape m-range<< ;
GENERIC: update-bounds ( header shape -- header )
M: object update-bounds drop ;
M: polyline update-bounds update-box ;
M: polygon update-bounds update-box ;
M: multipoint update-bounds update-box ;
M: polyline-z update-bounds
[ call-next-method ] [ update-z-range ] [ update-m-range ] tri ;
M: polygon-z update-bounds
[ call-next-method ] [ update-z-range ] [ update-m-range ] tri ;
M: multipoint-z update-bounds
[ call-next-method ] [ update-z-range ] [ update-m-range ] tri ;
M: polyline-m update-bounds
[ call-next-method ] [ update-m-range ] bi ;
M: polygon-m update-bounds
[ call-next-method ] [ update-m-range ] bi ;
M: multipoint-m update-bounds
[ call-next-method ] [ update-m-range ] bi ;
M: multipatch update-bounds
[ update-box ] [ update-z-range ] [ update-m-range ] tri ;
GENERIC: (write-shape) ( shape -- )
M: null-shape (write-shape) drop ;
M: point (write-shape) write-point ;
: write-poly ( poly -- )
{
[ box>> [ write-double ] each ]
[ parts>> length write-int ]
[ points>> length write-int ]
[ parts>> [ write-int ] each ]
[ points>> [ write-point ] each ]
} cleave ; inline
M: polyline (write-shape) write-poly ;
M: polygon (write-shape) write-poly ;
M: multipoint (write-shape)
{
[ box>> [ write-double ] each ]
[ points>> length write-int ]
[ points>> [ write-point ] each ]
} cleave ;
M: point-z (write-shape)
[ call-next-method ] [ z>> ] [ m>> ] tri [ write-double ] bi@ ;
: write-z ( shape -- )
[ z-range>> ] [ z-array>> ] bi [ [ write-double ] each ] bi@ ; inline
: write-m ( shape -- )
[ m-range>> ] [ m-array>> ] bi [ [ write-double ] each ] bi@ ; inline
: write-poly-z ( poly -- )
[ write-poly ] [ write-z ] [ write-m ] tri ; inline
M: polyline-z (write-shape) write-poly-z ;
M: polygon-z (write-shape) write-poly-z ;
M: multipoint-z (write-shape)
[ call-next-method ] [ write-z ] [ write-m ] tri ;
M: point-m (write-shape)
[ call-next-method ] [ m>> write-double ] bi ;
: write-poly-m ( poly -- )
[ write-poly ] [ write-m ] bi ; inline
M: polyline-m (write-shape) write-poly-m ;
M: polygon-m (write-shape) write-poly-m ;
M: multipoint-m (write-shape)
[ call-next-method ] [ write-m ] bi ;
M: multipatch (write-shape)
{
[ box>> [ write-double ] each ]
[ parts>> length write-int ]
[ points>> length write-int ]
[ parts>> [ write-int ] each ]
[ part-types>> [ write-int ] each ]
[ points>> [ write-point ] each ]
[ write-z ]
[ write-m ]
} cleave ;
GENERIC: shape-type ( shape -- shape-type )
M: null-shape shape-type drop 0 ;
M: point shape-type drop 1 ;
M: polyline shape-type drop 3 ;
M: polygon shape-type drop 5 ;
M: multipoint shape-type drop 8 ;
M: point-z shape-type drop 11 ;
M: polyline-z shape-type drop 13 ;
M: polygon-z shape-type drop 15 ;
M: multipoint-z shape-type drop 18 ;
M: point-m shape-type drop 21 ;
M: polyline-m shape-type drop 23 ;
M: polygon-m shape-type drop 25 ;
M: multipoint-m shape-type drop 28 ;
M: multipatch shape-type drop 31 ;
: write-shape ( shape -- )
[ shape-type write-int ] [ (write-shape) ] bi ;
: write-header ( header -- )
{
[ file-code>> 4 >be write ]
[ drop 20 <byte-array> write ] ! unused
[ file-length>> 4 >be write ]
[ version>> write-int ]
[ shape-type>> write-int ]
[ x-min>> 0.0 or write-double ]
[ y-min>> 0.0 or write-double ]
[ x-max>> 0.0 or write-double ]
[ y-max>> 0.0 or write-double ]
[ z-min>> 0.0 or write-double ]
[ z-max>> 0.0 or write-double ]
[ m-min>> 0.0 or write-double ]
[ m-max>> 0.0 or write-double ]
} cleave ;
: write-record ( shape index -- )
1 + 4 >be write
binary [ write-shape ] with-byte-writer
[ length 2/ 4 >be write ] [ write ] bi ;
ERROR: non-null-shapes-must-be-same-type shape-types ;
: non-null-shape-types ( shapes -- shape-types )
[ null-shape? ] reject [ class-of ] map members ;
: check-shape-types ( shapes -- )
non-null-shape-types dup length 1 >
[ non-null-shapes-must-be-same-type ] [ drop ] if ;
: write-shp ( shapes -- header indices )
[ header new ] dip {
[ check-shape-types ]
[ first shape-type >>shape-type ]
[ [ update-bounds ] each ]
[ ]
} cleave binary [
[
[ tell-output 100 + 2/ ] 2dip write-record
tell-output 100 + 8 - 2/ over - index boa
] map-index
] with-byte-writer swap [
[ length 100 + 2/ >>file-length [ write-header ] keep ]
[ write ] bi
] dip ;
: write-index ( index -- )
[ offset>> ] [ content-length>> ] bi [ 4 >be write ] bi@ ;
: write-shx ( header indices -- )
[ length 8 * 100 + 2/ >>file-length write-header ]
[ [ write-index ] each ] bi ;
PRIVATE> PRIVATE>
: load-shapes ( path -- shapes ) : load-shapes ( path -- shapes )
".shp" append file>shp nip [ shape>> ] map ; ".shp" append file>shp nip [ shape>> ] map ;
: save-shapes ( shapes path -- )
[ ".shp" append binary [ write-shp ] with-file-writer ]
[ ".shx" append binary [ write-shx ] with-file-writer ] bi ;