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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
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