226 lines
8.6 KiB
Factor
226 lines
8.6 KiB
Factor
! (c)2009 Joe Groff, see BSD license
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USING: accessors arrays assocs fry kernel math
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math.affine-transforms math.functions math.parser math.trig
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peg.ebnf sequences sequences.squish splitting strings xml.data
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xml.syntax multiline ;
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IN: svg
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XML-NS: svg-name http://www.w3.org/2000/svg
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XML-NS: xlink-name http://www.w3.org/1999/xlink
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XML-NS: sodipodi-name http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd
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XML-NS: inkscape-name http://www.inkscape.org/namespaces/inkscape
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: svg-string>number ( string -- number )
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H{ { char: E char: e } } substitute "e" split1
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[ string>number ] [ [ string>number 10^ ] [ 1 ] if* ] bi* *
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>float ;
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EBNF: svg-transform>affine-transform [=[
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transforms =
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transform:m comma-wsp+ transforms:n => [[ m n a. ]]
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| transform
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transform =
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matrix
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| translate
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| scale
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| rotate
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| skewX
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| skewY
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matrix =
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"matrix" wsp* "(" wsp*
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number:xx comma-wsp
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number:xy comma-wsp
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number:yx comma-wsp
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number:yy comma-wsp
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number:ox comma-wsp
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number:oy wsp* ")"
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=> [[ { xx xy } { yx yy } { ox oy } <affine-transform> ]]
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translate =
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"translate" wsp* "(" wsp* number:tx ( comma-wsp number:ty => [[ ty ]] )?:ty wsp* ")"
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=> [[ tx ty 0.0 or 2array <translation> ]]
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scale =
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"scale" wsp* "(" wsp* number:sx ( comma-wsp number:sy => [[ sy ]] )?:sy wsp* ")"
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=> [[ sx sy sx or <scale> ]]
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rotate =
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"rotate" wsp* "(" wsp* number:a ( comma-wsp number:cx comma-wsp number:cy => [[ cx cy 2array ]])?:c wsp* ")"
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=> [[ a deg>rad <rotation> c [ center-rotation ] when* ]]
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skewX =
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"skewX" wsp* "(" wsp* number:a wsp* ")"
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=> [[ { 1.0 0.0 } a deg>rad tan 1.0 2array { 0.0 0.0 } <affine-transform> ]]
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skewY =
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"skewY" wsp* "(" wsp* number:a wsp* ")"
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=> [[ 1.0 a deg>rad tan 2array { 0.0 1.0 } { 0.0 0.0 } <affine-transform> ]]
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number =
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sign? (floating-point-constant | integer-constant) => [[ squish-strings svg-string>number ]]
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comma-wsp =
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(wsp+ comma? wsp*) | (comma wsp*)
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comma =
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","
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integer-constant =
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digit-sequence
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floating-point-constant =
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fractional-constant exponent?
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| digit-sequence exponent
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fractional-constant =
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digit-sequence? "." digit-sequence
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| digit-sequence "."
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exponent =
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( "e" | "E" ) sign? digit-sequence
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sign =
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"+" => [[ f ]] | "-"
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digit-sequence = [0-9]+ => [[ >string ]]
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wsp = [ \t\r\n]
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transform-list = wsp* transforms?:t wsp*
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=> [[ t [ identity-transform ] unless* ]]
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]=]
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: tag-transform ( tag -- transform )
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"transform" svg-name attr svg-transform>affine-transform ;
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TUPLE: moveto p relative? ;
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TUPLE: closepath ;
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TUPLE: lineto p relative? ;
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TUPLE: horizontal-lineto x relative? ;
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TUPLE: vertical-lineto y relative? ;
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TUPLE: curveto p1 p2 p relative? ;
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TUPLE: smooth-curveto p2 p relative? ;
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TUPLE: quadratic-bezier-curveto p1 p relative? ;
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TUPLE: smooth-quadratic-bezier-curveto p relative? ;
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TUPLE: elliptical-arc radii x-axis-rotation large-arc? sweep? p relative? ;
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: (set-relative) ( args rel -- args )
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'[ [ _ >>relative? drop ] each ] keep ;
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EBNF: svg-path>array [=[
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moveto-drawto-command-groups =
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moveto-drawto-command-group:first wsp* moveto-drawto-command-groups:rest
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=> [[ first rest append ]]
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| moveto-drawto-command-group
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moveto-drawto-command-group =
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moveto:m wsp* drawto-commands?:d => [[ m d append ]]
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drawto-commands =
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drawto-command:first wsp* drawto-commands:rest => [[ first rest append ]]
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| drawto-command
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drawto-command =
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closepath
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| lineto
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| horizontal-lineto
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| vertical-lineto
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| curveto
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| smooth-curveto
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| quadratic-bezier-curveto
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| smooth-quadratic-bezier-curveto
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| elliptical-arc
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moveto =
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("M" => [[ f ]] | "m" => [[ t ]]):rel wsp* moveto-argument-sequence:args
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=> [[ args rel (set-relative) ]]
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moveto-argument = coordinate-pair => [[ f moveto boa ]]
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moveto-argument-sequence =
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moveto-argument:first comma-wsp? lineto-argument-sequence:rest
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=> [[ rest first prefix ]]
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| moveto-argument => [[ 1array ]]
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closepath =
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("Z" | "z") => [[ drop closepath boa 1array ]]
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lineto =
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("L" => [[ f ]] | "l" => [[ t ]]):rel wsp* lineto-argument-sequence:args
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=> [[ args rel (set-relative) ]]
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lineto-argument = coordinate-pair => [[ f lineto boa ]]
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lineto-argument-sequence =
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lineto-argument:first comma-wsp? lineto-argument-sequence:rest
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=> [[ rest first prefix ]]
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| lineto-argument => [[ 1array ]]
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horizontal-lineto =
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( "H" => [[ f ]] | "h" => [[ t ]]):rel wsp* horizontal-lineto-argument-sequence:args
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=> [[ args rel (set-relative) ]]
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horizontal-lineto-argument = coordinate => [[ f horizontal-lineto boa ]]
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horizontal-lineto-argument-sequence =
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horizontal-lineto-argument:first comma-wsp? horizontal-lineto-argument-sequence:rest
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=> [[ rest first prefix ]]
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| horizontal-lineto-argument => [[ 1array ]]
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vertical-lineto =
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( "V" => [[ f ]] | "v" => [[ t ]]):rel wsp* vertical-lineto-argument-sequence:args
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=> [[ args rel (set-relative) ]]
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vertical-lineto-argument = coordinate => [[ f vertical-lineto boa ]]
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vertical-lineto-argument-sequence =
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vertical-lineto-argument:first comma-wsp? vertical-lineto-argument-sequence:rest
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=> [[ rest first prefix ]]
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| vertical-lineto-argument => [[ 1array ]]
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curveto =
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( "C" => [[ f ]] | "c" => [[ t ]]):rel wsp* curveto-argument-sequence:args
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=> [[ args rel (set-relative) ]]
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curveto-argument-sequence =
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curveto-argument:first comma-wsp? curveto-argument-sequence:rest
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=> [[ rest first prefix ]]
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| curveto-argument => [[ 1array ]]
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curveto-argument =
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coordinate-pair:pone comma-wsp? coordinate-pair:ptwo comma-wsp? coordinate-pair:p
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=> [[ pone ptwo p f curveto boa ]]
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smooth-curveto =
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( "S" => [[ f ]] | "s" => [[ t ]] ):rel wsp* smooth-curveto-argument-sequence:args
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=> [[ args rel (set-relative) ]]
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smooth-curveto-argument-sequence =
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smooth-curveto-argument:first comma-wsp? smooth-curveto-argument-sequence:rest
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=> [[ rest first prefix ]]
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| smooth-curveto-argument => [[ 1array ]]
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smooth-curveto-argument =
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coordinate-pair:ptwo comma-wsp? coordinate-pair:p
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=> [[ ptwo p f smooth-curveto boa ]]
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quadratic-bezier-curveto =
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( "Q" => [[ f ]] | "q" => [[ t ]] ):rel wsp* quadratic-bezier-curveto-argument-sequence:args
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=> [[ args rel (set-relative) ]]
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quadratic-bezier-curveto-argument-sequence =
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quadratic-bezier-curveto-argument:first comma-wsp?
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quadratic-bezier-curveto-argument-sequence:rest
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=> [[ rest first prefix ]]
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| quadratic-bezier-curveto-argument => [[ 1array ]]
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quadratic-bezier-curveto-argument =
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coordinate-pair:pone comma-wsp? coordinate-pair:p
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=> [[ pone p f quadratic-bezier-curveto boa ]]
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smooth-quadratic-bezier-curveto =
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( "T" => [[ f ]] | "t" => [[ t ]] ):rel wsp* smooth-quadratic-bezier-curveto-argument-sequence:args
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=> [[ args rel (set-relative) ]]
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smooth-quadratic-bezier-curveto-argument-sequence =
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smooth-quadratic-bezier-curveto-argument:first comma-wsp? smooth-quadratic-bezier-curveto-argument-sequence:rest
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=> [[ rest first prefix ]]
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| smooth-quadratic-bezier-curveto-argument => [[ 1array ]]
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smooth-quadratic-bezier-curveto-argument = coordinate-pair => [[ f smooth-quadratic-bezier-curveto boa ]]
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elliptical-arc =
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( "A" => [[ f ]] | "a" => [[ t ]] ):rel wsp* elliptical-arc-argument-sequence:args
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=> [[ args rel (set-relative) ]]
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elliptical-arc-argument-sequence =
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elliptical-arc-argument:first comma-wsp? elliptical-arc-argument-sequence:rest
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=> [[ rest first prefix ]]
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| elliptical-arc-argument => [[ 1array ]]
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elliptical-arc-argument =
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nonnegative-number:radiix comma-wsp? nonnegative-number:radiiy comma-wsp?
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number:xrot comma-wsp flag:large comma-wsp flag:sweep
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comma-wsp coordinate-pair:p
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=> [[ radiix radiiy 2array xrot large sweep p f elliptical-arc boa ]]
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coordinate-pair = coordinate:x comma-wsp? coordinate:y => [[ x y 2array ]]
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coordinate = number
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nonnegative-number = (floating-point-constant | integer-constant) => [[ squish-strings svg-string>number ]]
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number = sign? (floating-point-constant | integer-constant) => [[ squish-strings svg-string>number ]]
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flag = "0" => [[ f ]] | "1" => [[ t ]]
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comma-wsp = (wsp+ comma? wsp*) | (comma wsp*)
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comma = ","
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integer-constant = digit-sequence
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floating-point-constant = fractional-constant exponent? | digit-sequence exponent
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fractional-constant = digit-sequence? "." digit-sequence | digit-sequence "."
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exponent = ( "e" | "E" ) sign? digit-sequence
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sign = "+" => [[ drop f ]] | "-"
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digit-sequence = [0-9]+ => [[ >string ]]
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wsp = [ \t\r\n]
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svg-path = wsp* moveto-drawto-command-groups?:x wsp* => [[ x ]]
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]=]
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: tag-d ( tag -- d )
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"d" svg-name attr svg-path>array ;
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