harvey/sys/lib/ghostscript/gs_devpxl.ps

%    Copyright (C) 2002 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: gs_devpxl.ps,v 1.1 2002/08/22 07:12:28 henrys Exp $
% DevicePixel color space method dictionaries.

%
% This file implements the DevicePixel color space. See gs_cspace.ps
% for information.
%
% The DevicePixel color space includes a single parameter, the bit
% depth of the device color representation. Color is expressed as
% single integers in an opaque, device-specific format.
%

% verify that the DevicePixel color space is supported
/.setdevicepixelspace where
  { pop }
  { currentfile closefile }
ifelse


.currentglobal true .setglobal

.cspace_util begin


colorspacedict
/DevicePixel
  mark
    /cs_potential_indexed_base true
    /cs_potential_pattern_base true
    /cs_potential_alternate true
    /cs_potential_icc_alternate true
    /cs_get_ncomps //ncomps_1
    /cs_get_range { [ exch 1 get 1 exch bitshift 1 sub ] } bind
    /cs_get_default_color { pop 0 } bind    % no good default
    /cs_get_currentgray //no_currentgray
    /cs_get_currentrgb //no_currentrgb
    /cs_get_currentcmyk //no_currentcmyk

    /cs_validate
      {
        //check_array exec
        dup 1 get dup type /integertype ne
          //setcspace_typecheck
        if
        dup 0 lt
          //setcspace_rangecheck
        if
        31 gt   % 31 bits is an implementation limit
          { /setcolorspace cvx /limitcheck signalerror }
        if
      }
    bind

    /cs_substitute //dup_1
    /cs_prepare {}
    /cs_install { .setdevicepixelspace } bind
    /cs_prepare_color //validate_1
    /cs_complete_setcolor //pop_1
  .dicttomark
put

end     % .cspace_util
.setglobal