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% Copyright (C) 2001-2012 Artifex Software, Inc.
% All Rights Reserved.
%
% This software is provided AS-IS with no warranty, either express or
% implied.
%
% This software is distributed under license and may not be copied,
% modified or distributed except as expressly authorized under the terms
% of the license contained in the file LICENSE in this distribution.
%
% Refer to licensing information at http://www.artifex.com or contact
% Artifex Software, Inc.,  7 Mt. Lassen Drive - Suite A-134, San Rafael,
% CA  94903, U.S.A., +1(415)492-9861, for further information.
%

% 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.
% Colorspace defaults to cmyk, but -dGray or -dRGB can change it

/viewraw {			% <filename> <ncomp> <width> viewraw -
  20 dict begin
  % Default ncomp is 4 == CMYK
  /w exch def
  /fname exch def
  /ncomp 
  /Gray where
  { pop 1 }					% DeviceGray is 1 component
  { /RGB where { pop 3 } { 4 } ifelse	% DeviceRGB is 3 component, DeviceCMYK is 4 component
  } ifelse
  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 ncomp 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 ncomp colorimage
  << /ImageType 1 /Width w /Height h /ImageMatrix [1 0 0 -1 0 h] 
     /MultipleDataSources false /DataSource f /BitsPerComponent BITS
     /Decode BITS 1 gt		% inverted sense for 1 bit per component 
       { [ [ 0 1 ] [0] [ 0 1 0 1 0 1 ] [ 0 1 0 1 0 1 0 1 ] ] ncomp 1 sub get }
       { [ [ 1 0 ] [0] [ 1 0 1 0 1 0 ] [ 1 0 1 0 1 0 1 0 ] ] ncomp 1 sub get }
     ifelse
  >> image
  showpage
  f closefile
  end
} bind def

% If the program was invoked from the command line, run it now.
[ shellarguments {
  counttomark 2 eq {
    cvi viewraw
  } {
    cleartomark
    (Usage: gs -- viewraw filename.raw width\n) print
    ( e.g.: gs -- viewraw my.raw 2550\n) print flush
  } ifelse
} {
  pop
} ifelse