viewcmyk.ps

遗传算法工具箱 希望高手指点 GATOOLS

%    Copyright (C) 1996 Aladdin Enterprises.  All rights reserved.
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% viewcmyk.ps
% Display a 1-bit-per-component 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.

/viewcmyk			% <filename> <width> viewcmyk -
 { 20 dict begin
   /w exch def
   /fname exch def
   /f fname (r) file def
   mark fname status pop pop pop /flen exch def cleartomark
   /h flen w 1 add 2 idiv idiv def
   (Dimensions: ) print [w h] == flush
		% Set up scaling.
   /SCALE where
    { pop
	% Map pixels SCALE-for-1.  Assume orthogonal transformation.
      w 1 0 dtransform add abs div SCALE mul
      h 0 1 dtransform add abs div SCALE mul
    }
    {	% Scale the image (uniformly) to fit the page.
      clippath pathbbox pop pop translate
      pathbbox 4 2 roll pop pop
      h div w mul min dup
    }
   ifelse scale
   w h 1 [w 0 0 h neg 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