ref: fe1eb39db7ae6904924f3ab1f6f9b34416f2eb1b
dir: /sys/src/cmd/postscript/postgif/postgif.ps/
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% Version 3.3.2 prologue for GIF pixmap files.
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/#copies 1 store
/aspectratio 1 def
/formsperpage 1 def
/landscape false def
/magnification 1 def
/margin 0 def
/orientation 0 def
/rotation 1 def
/xoffset 0 def
/yoffset 0 def
/useclippath true def
/pagebbox [0 0 612 792] def
/inch {72 mul} bind def
/min {2 copy gt {exch} if pop} bind def
/setup {
counttomark 2 idiv {def} repeat pop
landscape {/orientation 90 orientation add def} if
pagedimensions
xcenter ycenter translate
orientation rotation mul rotate
xoffset inch yoffset inch translate
magnification dup aspectratio mul scale
/height height margin sub def
/width width margin sub def
} def
/pagedimensions {
useclippath {
/pagebbox [clippath pathbbox newpath] def
} if
pagebbox aload pop
4 -1 roll exch 4 1 roll 4 copy
landscape {4 2 roll} if
sub /width exch def
sub /height exch def
add 2 div /xcenter exch def
add 2 div /ycenter exch def
userdict /gotpagebbox true put
} def
/pagesetup {/page exch def} bind def
/done {/lastpage where {pop lastpage} if} def
/alignment false def
/gifscreen { % scrwidth scrheight $
2 copy
alignment {
100 dup dtransform exch 100 exch div abs exch 100 exch div abs
2 copy scale
/height exch height exch div def
/width exch width exch div def
} if
height exch div exch width exch div
2 copy lt { pop } { exch pop } ifelse
alignment { cvi } if
dup scale
neg 2 div exch neg 2 div exch translate
} def
/gifimage { % gray imagewidth imageheight xorigin yorigin $
translate
2 copy scale
/imageheight exch def
/imagewidth exch def
/gray exch def
imagewidth imageheight 8 [imagewidth 0 0 imageheight neg 0 imageheight]
gray {
{ currentfile codestr readhexstring pop } image
} {
/colorimage where {
pop
/picstr imagewidth 3 mul string def
{ currentfile codestr readhexstring pop pop
0 1 imagewidth 1 sub {
picstr exch dup 3 mul exch colortbl exch codestr exch get
3 mul 3 getinterval putinterval
} for picstr
} false 3 colorimage
} {
{ currentfile codestr readhexstring pop pop
0 1 imagewidth 1 sub {
codestr exch dup graytbl exch codestr exch get get put
} for codestr
} image
} ifelse
} ifelse
} def