ref: d9a964788bede9b48d1444d2d7a39ece0cef17c5
dir: /sys/lib/postscript/prologues/postp9bit.ps/
%
% Version 3.3 prologue for plan9 bitmap files.
%
/#copies 1 store
/aspectratio 1 def
/formsperpage 1 def
/landscape false def
/magnification 1 def
/margin 0 def
/orientation 0 def
/rotation 1 def
/screenres 100 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
/bitmap {
/scanlines exch def
/scanlength exch def
/bitspersample exch def
%% /v8format exch def
/bytelength scanlength bitspersample mult 7 add 8 idiv def
/picstr bytelength string def
/lpicstr bytelength string def
%% /bytelength bytelength 1 sub def
gsave
% First the overall scaling.
height scanlines div width scanlength div min
72 screenres div min
dup scale
% Followed by the one for the unit square.
scanlength neg 2 div scanlines neg 2 div translate
scanlength scanlines scale
getp9bitmap
grestore
} bind def
/getp9bitmap {
scanlength scanlines bitspersample [scanlength 0 0 scanlines neg 0 scanlines] {
currentfile picstr readhexstring pop} image
} bind def
/done {/lastpage where {pop lastpage} if} def