Jim Barlow
f7db8d9aff
Ghostscript has the clunkiest imaginable syntax, obtuse documentation, quirky behavior, and poor diagnostics... but it *actually works* unlike pdftoppm/poppler which gets things wrong. In this case I observed poppler incorrectly decompresses certain CCITT encoded monochrome PDFs. So set up Ghostscript to do the job instead. For the moment this performs monochrome -> RGB conversion via reportlab.
41 lines
1.3 KiB
PostScript
41 lines
1.3 KiB
PostScript
%!
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% This is a sample prefix file for creating a PDF/A document.
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% Feel free to modify entries marked with "Customize".
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% This assumes an ICC profile to reside in the file (ISO Coated sb.icc),
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% unless the user modifies the corresponding line below.
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% Define entries in the document Info dictionary :
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/ICCProfile (/usr/local/share/ghostscript/iccprofiles/srgb.icc) % Customise
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def
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[ /Title ( ) % Customise
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/DOCINFO pdfmark
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% Define an ICC profile :
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[/_objdef {icc_PDFA} /type /stream /OBJ pdfmark
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[{icc_PDFA}
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<<
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/N currentpagedevice /ProcessColorModel known {
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currentpagedevice /ProcessColorModel get dup /DeviceGray eq
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{pop 1} {
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/DeviceRGB eq
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{3}{4} ifelse
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} ifelse
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} {
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(ERROR, unable to determine ProcessColorModel) == flush
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} ifelse
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>> /PUT pdfmark
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[{icc_PDFA} ICCProfile (r) file /PUT pdfmark
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% Define the output intent dictionary :
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[/_objdef {OutputIntent_PDFA} /type /dict /OBJ pdfmark
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[{OutputIntent_PDFA} <<
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/Type /OutputIntent % Must be so (the standard requires).
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/S /GTS_PDFA1 % Must be so (the standard requires).
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/DestOutputProfile {icc_PDFA} % Must be so (see above).
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/OutputConditionIdentifier (sRGB) % Customize
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>> /PUT pdfmark
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[{Catalog} <</OutputIntents [ {OutputIntent_PDFA} ]>> /PUT pdfmark
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