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%!
% This is a sample prefix file for creating a PDF/X-3 document.
% Users should modify entries marked with "Customize".
% This assumes an ICC profile resides in the file (ISO Coated sb.icc)
% in the current directory unless the user modifies the corresponding line below.
% First up, attempt to ensure the user has set ColorConversionStrategy correctly.
% PDF/X-3 only permits Gray or CMYK in the output.
%
systemdict /ColorConversionStrategy known {
systemdict /ColorConversionStrategy get cvn dup /Gray ne exch /CMYK ne and
} {
(\nERROR: ColorConversionStrategy not set.)=
true
} ifelse
{ (ERROR: ColorConversionStrategy must be /DeviceGray or /DeviceCMYK.)=
/ColorConversionStrategy cvx /rangecheck signalerror
} if
% Define entries in the document Info dictionary :
%
[ /GTS_PDFXVersion (PDF/X-3:2002) % Must be so (the standard requires).
/Title (Title) % Customize.
/Trapped /False % Must be so (Ghostscript doesn't provide other).
/DOCINFO pdfmark
/ICCProfile (ISO Coated sb.icc) def % Customize or remove.
% Define an ICC profile in the output, if the user specified one.
%
currentdict /ICCProfile known {
[/_objdef {icc_PDFX} /type /stream /OBJ pdfmark
% This code attempts to set the /N (number of components) key for the ICC colour space.
% To do this it checks the ColorConversionStrategy or the device ProcessColorModel if
% ColorConversionStrategy is not set.
% This is not 100% reliable. A better solution is for the user to edit this and replace
% the code between the ---8<--- lines with a simple declaration like:
% /N 3
% where the value of N is the number of components from the profile defined in /ICCProfile above.
% Note, if you don't set ColorConversionStrategy, the output will likely be invalid anyway.
[{icc_PDFX} <<
% ----------8<--------------8<-------------8<--------------8<----------
systemdict /ColorConversionStrategy known {
systemdict /ColorConversionStrategy get cvn dup /Gray eq {
pop /N 1 false
}{
dup /RGB eq {
(RGB is not a valid ColorConversionStrategy for PDF/X output)=
/ColorConversionStrategycvx /rangecheck signalerror
}{
/CMYK eq {
/N 4 false
}{
(ColorConversionStrategy not a device space, falling back to ProcessColorModel, output may not be valid PDF/X.)=
true
} ifelse
} ifelse
} ifelse
} {
(ColorConversionStrategy not set, falling back to ProcessColorModel, output may not be valid PDF/X.)=
true
} ifelse
{
currentpagedevice /ProcessColorModel get
dup /DeviceGray eq {
pop /N 1
}{
dup /DeviceRGB eq {
(RGB is not a valid ProcessColorModel for PDF/X output)=
/ColorConversionStrategycvx /rangecheck signalerror
}{
dup /DeviceCMYK eq {
pop /N 4
} {
(ProcessColorModel not a device space.)=
/ProcessColorModel cvx /rangecheck signalerror
} ifelse
} ifelse
} ifelse
} if
% ----------8<--------------8<-------------8<--------------8<----------
>> /PUT pdfmark
[{icc_PDFX} ICCProfile (r) file /PUT pdfmark
} if
% Define the output intent dictionary :
[/_objdef {OutputIntent_PDFX} /type /dict /OBJ pdfmark
[{OutputIntent_PDFX} <<
/Type /OutputIntent % Must be so (the standard requires).
/S /GTS_PDFX % Must be so (the standard requires).
/OutputCondition (Commercial and specialty printing) % Customize
/Info (none) % Customize
/OutputConditionIdentifier (CGATS TR001) % Customize
/RegistryName (http://www.color.org) % Must be so (the standard requires).
currentdict /ICCProfile known {
/DestOutputProfile {icc_PDFX} % Must be so (see above).
} if
>> /PUT pdfmark
[{Catalog} <</OutputIntents [ {OutputIntent_PDFX} ]>> /PUT pdfmark
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