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artasparks / gpub

GPub: Go Publishing for Glift
MIT License
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Ensure PDF/X-1a:2001 compatibility #23

Closed artasparks closed 9 years ago

artasparks commented 9 years ago

We should have a story for PDF/X-1a:2001 compatibility that isn't, "install Adobe Acrobat pro".

artasparks commented 9 years ago

Looks like this might be sufficient: tex.stackechange.com

artasparks commented 9 years ago

First pass: I've installed a trial of Adobe Acrobat. Here's the report:

Results (Summary) Errors: Annotation inside page area (227 matches on 128 pages) - 5, 13, 14, 15, 16, 17, 18, 19, 20, 23, 24, 25, 26, 27, 28, 29, 30, 31, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42... Compressed object streams used Document contains actions Document title empty/missing OutputIntent for PDF/X missing PDF version is newer than 1.3 PDF/X version key (GTS_PDFXVersion) missing Page does not have TrimBox or ArtBox (167 matches on 167 pages) - 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28...

artasparks commented 9 years ago

We'll start at the top

  1. Annotation inside page area (227 matches on 128 pages) - 5, 13, 14, 15, 16, 17, 18, 19, 20, 23, 24, 25, 26, 27, 28, 29, 30, 31, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42...

This has to do with hyperlinking. Thus, we can't hyperlink for PDF/X-1a pdfs.

artasparks commented 9 years ago

Looks like this might have fixed:

Compressed object streams used Document contains actions

artasparks commented 9 years ago

Ok, down to 4 errors:

Document title empty/missing OutputIntent for PDF/X missing PDF/X version key (GTS_PDFXVersion) missing Page does not have TrimBox or ArtBox (167 matches on 167 pages) - 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28...

artasparks commented 9 years ago

Down to 2 Errors:

OutputIntent for PDF/X missing Page does not have TrimBox or ArtBox (167 matches on 167 pages) - 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28...

artasparks commented 9 years ago

Down to 1 error:

Page does not have TrimBox or ArtBox (167 matches on 167 pages) - 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28...

I wonder what units the artbox / media box / trim box have to be?

artasparks commented 9 years ago

This site talks about what they are: http://www.prepressure.com/pdf/basics/page-boxes

But doesn't talk about units

artasparks commented 9 years ago

Looks like the units are PostScript pts:

http://www.cl.cam.ac.uk/~mgk25/iso-paper-ps.txt https://blog.idrsolutions.com/2009/07/what-is-pdf-pagesize/

1 pt = 25.4/72 mm A4 = 210 mm x 297 mm = 595 pt x 842 pt

artasparks commented 9 years ago

Woo! "No problems found"