harvey/sys/lib/ghostscript/traceimg.ps

%    Copyright (C) 1994 Aladdin Enterprises.  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.
% 
% For more information about licensing, please refer to
% http://www.ghostscript.com/licensing/. For information on
% commercial licensing, go to http://www.artifex.com/licensing/ or
% contact Artifex Software, Inc., 101 Lucas Valley Road #110,
% San Rafael, CA  94903, U.S.A., +1(415)492-9861.

% $Id: traceimg.ps,v 1.5 2002/06/02 12:03:28 mpsuzuki Exp $
% traceimg.ps
% Trace the data supplied to the 'image' operator.

% This code currently handles only the (Level 2) dictionary form of image,
% with a single data source and 8-bit pixels.

/traceimage			% <dict> traceimage -
 { currentcolorspace == (setcolorspace\n) print
   (<<) print
   dup { (\t) print exch ==only ( ) print == } forall
   (>>\n) print flush
   begin /i_left Width Height mul store /i_dict currentdict store end
    { i_left 0 le { exit } if
      i_dict /DataSource get exec
      dup type /filetype eq
       { i_buf 0 i_left 32 .min getinterval readstring pop
       } if
      dup (%stdout) (w) file exch writehexstring (\n) print flush
      i_left exch length sub /i_left exch def
    } loop
 } bind odef

/image /traceimage load def
/i_left 0 def
/i_dict null def
/i_buf 32 string def