| Current Path : /proc/3/task/3/cwd/usr/share/ghostscript/8.70/Resource/Init/ |
| Current File : //proc/3/task/3/cwd/usr/share/ghostscript/8.70/Resource/Init/gs_cspace.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_cspace.ps 8962 2008-08-11 14:16:18Z ken $
% basic colorspace mechanism
%
% There have been some major changes to the PostScript colour handling.
% In particular, the vast majority of the colour space code has been
% converted from PostScript to C. This file has been extensively
% modified, as has gs_icc.ps. The remaining PostScript files which
% previously implemented colour space handling; gs_ciecs2.ps, gs_ciecs3.ps
% gs_devcs.ps, gs_devn.ps, gs_devpxl.ps, gs_indxd.ps, gs_patrn.ps and
% gs_sepr.ps have been superceded by the C code and removed.
%
% gs_lev2.ps and gs_ll3.ps have also been modified so that they no longer
% attempt to execute these PostScript files.
%
.currentglobal true .setglobal
systemdict begin
%
% gs_res.ps, and possibly other files, use this dictionary. Formerly
% in cspace_util, moved to systemdict.
%
20 dict dup /colorspacedict exch def
begin % colorspacedict
%
% gs_res.ps uses these entries in colorspacedict
% to populate the ColorSpaceFamily resource, so we need
% to add the supported spaces.
%
/DeviceGray [] def
/DeviceRGB [] def
/DeviceCMYK [] def
end % colorspacedict
%
% Global, read-only, unpacked, array-form device color spaces
% We need to return an array argument in response to currentcolorspace
% even if the argument presented to setcolorspace was a simple device
% space name. Not only that, but in order to satisfy some Adobe
% applications, it must be the *same* array every time. The only way
% to do that is to define an appropriate set initial arrays and always return
% one of those. These arrays are defined here.
%
/DeviceGray_array /DeviceGray 1 array astore readonly def
/DeviceRGB_array /DeviceRGB 1 array astore readonly def
/DeviceCMYK_array /DeviceCMYK 1 array astore readonly def
%
% - initgraphics -
%
% The internal routine gs_initgraphics doesn't (re)set the color space,
% so we must redefine the operation to do it here.
%
%
/initgraphics
{ initgraphics systemdict /DeviceGray_array get setcolorspace }
.bind odef
%
% These routines used for the NOSUBSTDEVICECOLORS switch. This prevents
% substitution of DeviceGray, DeviceRGB and DeviceCMYK with a Default*
% colour space when /UseCIEColors is true. If the job includes a
% definition of /DefaltGray, DefaultRGB or DefaultCMYK then it also executes
% .includecolorspace to allow the device to record the substitute space.
%
/..page_default_spaces 3 dict def
%
% Used internally to retrieve any relevant default colour space.
%
% <Default space name> ..nosubstdevicetest false
% <Default space name> [space] true
%
% If the boolean is true then the C code must set the additional colour space
% and execute .includecolorspace before finally setting a DeviceGray space.
%
/..nosubstdevicetest
{
false mark 3 -1 roll
% If we have already recorded this space, don't repeat it.
systemdict /..page_default_spaces get 1 index known {
cleartomark
} {
{
% Check to see if this space was defined by defineresource, if so then
% the job defined it, otherwise its the usual default, so ignore it.
dup /ColorSpace resourcestatus {
pop 0 eq {
% Default* defined by defineresource
systemdict /..page_default_spaces get 1 index //true put
dup /ColorSpace findresource 4 2 roll pop pop true
}{
cleartomark
} ifelse
}{
cleartomark
} ifelse
} stopped
{cleartomark}if
} ifelse
}bind def
%
% <color_space_name> ..includecolorspace -
%
/..includecolorspace
{
% If we have already recorded this space, don't repeat it.
systemdict /..page_default_spaces get 1 index known {
pop
} {
mark exch
{
% Check to see if this space was defined by defineresource, if so then
% the job defined it, otherwise its the usual default, so ignore it.
dup /ColorSpace resourcestatus {
pop 0 eq {
% Job defined /Default*, so record it and allow the device access to it
systemdict /..page_default_spaces get 1 index //true put
gsave
{ dup /ColorSpace findresource //setcolorspace exec .includecolorspace
} stopped pop
grestore
} if
} if
} stopped pop
cleartomark
} ifelse
} bind def
%
% <color_space> <color_space_name> cs_substitute_generic <color_space1> <color_space2>
%
/cs_substitute_generic
{ .getuseciecolor
{NOSUBSTDEVICECOLORS
{ //..includecolorspace exec dup }
{ /ColorSpace findresource }
ifelse
}
{ pop dup }
ifelse
}
bind def
%
% <color_space> <color_space_name> cs_substitute_DeviceRGB_for_PDFX_or_PDFA <color_space1> <color_space2>
%
/cs_substitute_DeviceRGB_for_PDFX_or_PDFA
{ systemdict /PDFX .knownget not { false } if
systemdict /PDFA .knownget not { false } if
or {
dup /ColorSpace resourcestatus {
pop pop
} {
(Error: Need a /DefaultRGB /ColorSpace resource for generating a PDF/X or PDF/A document.) =
/cs_substitute_DeviceRGB_for_PDFX_or_PDFA cvx /undefined signalerror
} ifelse
/ColorSpace findresource
} {
//cs_substitute_generic exec
} ifelse
} bind def
end
%
% used to convert the DataSource of an ICCBased colour space into a
% file, if it isn't one already. This is required because the current
% implementation of ICC spaces requires the data source to be a file.
% This routine is *only* called from the PostScript interpreter when
% setting an ICCBased space with a string data source.
%
/.convertICCSource
{
% make DataSource a file
dup 1 get /DataSource get type /stringtype eq
{
% build all new structures in local VM
.currentglobal exch //false .setglobal
% check if we need to copy the color space and dictionary
2 copy eq
{
dup length array copy
dup 1 2 copy get dup length dict copy put
}
if
% fetch DataSource, setting up stack for multiple puts
dup 1 2 copy get dup /DataSource 2 copy get
% convert the string into a file
/ReusableStreamDecode filter
% put the file into the dictioary, the dictionary into the array
put put
% restore the VM mode
exch .setglobal
}
if
} bind def
%
% Set the initial device space
%
systemdict /DeviceGray_array get setcolorspace
.setglobal
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