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% $Id: viewcmyk.ps,v 1.2 2000/09/19 18:29:11 lpd Exp $
% viewcmyk.ps
% Display a raw CMYK file.
% Requires the colorimage operator.
% If SCALE is defined, maps input pixels to output pixels with that scale;
% if SCALE is undefined, scales the image to fit the page.
% If BITS is defined, it is the number of bits per sample (1,2,4,8,12);
% if BITS is undefined, its default value is 1.
/viewcmyk { % <filename> <width> viewcmyk -
20 dict begin
/w exch def
/fname exch def
/bpc /BITS where { pop BITS } { 1 } ifelse def
/f fname (r) file def
mark fname status pop pop pop /flen exch def cleartomark
/h flen w bpc 4 mul mul 7 add 8 idiv idiv def
(Dimensions: ) print [w h] == flush
% Set up scaling.
/SCALE where {
pop
% Map pixels SCALE-for-1. Assume orthogonal transformation.
SCALE 1 0 dtransform add abs div
SCALE 0 1 dtransform add abs div
} {
% Scale the image (uniformly) to fit the page.
clippath pathbbox pop pop translate
pathbbox 3 -1 roll sub h div
3 1 roll exch sub w div min dup
} ifelse scale
w h bpc [1 0 0 -1 0 h] f false 4 colorimage
showpage
f closefile
end
} bind def
% If the program was invoked from the command line, run it now.
[ shellarguments {
counttomark 2 eq {
cvi viewcmyk
} {
cleartomark
(Usage: gs -- viewcmyk.ps filename.cmyk width\n) print
( e.g.: gs -- viewcmyk.ps my.cmyk 2550\n) print flush
} ifelse
} {
pop
} ifelse
Mini Shell