Mini Shell

/BOX {
    /boxy1 exch def /boxx1 exch def /boxy0 exch def /boxx0 exch def
    boxx0 boxy0 moveto boxx1 boxy0 lineto
    boxx1 boxy1 lineto boxx0 boxy1 lineto
    closepath
} def
/SCP { stroke initclip newpath BOX clip newpath } def
/CL { stroke setrgbcolor } def
/DO { stroke } def
/NP { newpath } def
/FI { fill } def
/LI { moveto lineto } def
/CT { curveto } def
/AR {
    /ang2 exch def /ang1 exch def
    /radius exch def /y2x exch def /cy exch def /cx exch def
    gsave
        cx cy translate 1 y2x scale 0 0 radius ang1 ang2 arc stroke
    grestore
} def
/ARF {
    /ang2 exch def /ang1 exch def
    /radius exch def /y2x exch def /cy exch def /cx exch def
    gsave
        cx cy translate 1 y2x scale 0 0 radius ang1 ang2 arc fill
    grestore
} def
/TXT {
    /texth exch def
    /textf exch def
    /textn exch def
    /texts exch def
    /textyj exch def /texty exch def
    /textxj exch def /textx exch def
    textf findfont texth scalefont dup setfont
    /FontBBox get 1 get 1000 div texth mul /textbl exch def
    /textth texth textn mul def /texttw 0 def
    0 1 textn 1 sub {
        texts exch get 0 get stringwidth pop
        dup texttw gt { /texttw exch def } { pop } ifelse
    } for
    textyj (b) eq { /ty texty textth add textbl add def } if
    textyj (d) eq { /ty texty textth add def } if
    textyj (c) eq { /ty texty textth 2 div add def } if
    textyj (u) eq { /ty texty def } if
    /ty ty textbl sub def
    textxj (l) eq { /tx textx def } if
    textxj (c) eq { /tx textx texttw 2 div sub def } if
    textxj (r) eq { /tx textx texttw sub def } if
    0 1 textn 1 sub {
        /ty ty texth sub def
        texts exch get dup 0 get /ts exch def 1 get /tj exch def
        tj (l) eq { tx ty moveto ts show } if
        tj (n) eq {
            tx texttw ts stringwidth pop sub 2 div add ty moveto ts show
        } if
        tj (r) eq {
            tx texttw ts stringwidth pop sub add ty moveto ts show
        } if
    } for
} def

/colorimage where {
    pop
} {
    /bwproc {
        rgbproc dup length 3 idiv string 0 3 0 5 -1 roll {
            add 2 1 roll 1 sub dup 0 eq {
                pop 3 idiv 3 -1 roll dup 4 -1 roll
                dup 3 1 roll 5 -1 roll put 1 add 3 0
            } {
                2 1 roll
            } ifelse
        } forall
        pop pop pop
    } def
    /colorimage {
        pop pop /rgbproc exch def {bwproc} image
    } bind def
} ifelse