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gs_icc.ps
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2001-03-16
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% Copyright (C) 2001 Aladdin Enterprises. All rights reserved.
%
% This file is part of AFPL Ghostscript.
%
% AFPL Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author or
% distributor accepts any responsibility for the consequences of using it, or
% for whether it serves any particular purpose or works at all, unless he or
% she says so in writing. Refer to the Aladdin Free Public License (the
% "License") for full details.
%
% Every copy of AFPL Ghostscript must include a copy of the License, normally
% in a plain ASCII text file named PUBLIC. The License grants you the right
% to copy, modify and redistribute AFPL Ghostscript, but only under certain
% conditions described in the License. Among other things, the License
% requires that the copyright notice and this notice be preserved on all
% copies.
% $Id: gs_icc.ps,v 1.1 2001/03/17 01:15:41 raph Exp $
% PostScript portion of ICCBased color space support
//userdict /.icc_comp_map_dict
<< 1 /DeviceGray 3 /DeviceRGB 4 /DeviceCMYK >>
put
colorspacedict /ICCBased
{
% Verify that the source object is an array, that it is at least of length
% two, and that the second entry is a readable dictionary. If we got this
% far, we know the top-level object exists and is readable, but it might
% be a dictionary.
dup type dup /arraytype ne exch /packedarraytype ne and
{ /setcolorspace /typecheck signalerror }
if
dup length 2 lt
{ /setcolorspace /rangecheck signalerror }
if
dup 1 get type /dicttype ne
{ /setcolorspace /typecheck signalerror }
if
dup 1 get rcheck not
{ /setcolorspace /invalidaccess signalerror }
if
% Verify that the dictionary defines the key N (number of components) and
% entry is provided and has a legitimate value
dup 1 get /N .knownget
{
//.icc_comp_map_dict exch known not
{
% generate the appropriate error
/setcolorspace
1 index 1 get /N type type /integertype ne
{ /typecheck }
{ /rangecheck }
ifelse
signalerror
}
if
}
{ /setcolorspace /undefined signalerror }
ifelse
% Verify DataSrouce and, if it is a string, convert it to a file
dup 1 get /DataSource .knownget
{
dup rcheck not
{ pop /setcolorspace /invalidaccess signalerror }
if
type dup /stringtype eq
{
pop
2 array copy
dup 1
2 copy get dup length dict copy
dup /DataSource
2 copy get /ReusableStreamDecode filter
put
put
}
{
/filetype ne
{ /setcolorspace /typecheck signalerror }
if
}
ifelse
}
{ /setcolorspace /undefined signalerror }
ifelse
% set the alternate color space to be the current color space
dup 1 get /Alternate .knownget not
{ dup 1 get /N get //.icc_comp_map_dict exch get }
if
setcolorspace
% if CIE spaces are not use, just take the alternate space
NOCIE
{ pop null }
{
% check for native support
/.seticcspace where
{ pop dup 1 get .seticcspace }
{ pop null }
ifelse
}
ifelse
}
bind put
//userdict /.icc_comp_map_dict undef