Does fpdf2 generate PDF compliant with PDF/X-1a ?

[dgl-dev]

PDF/X-1a is the Adobe standard / version required by KDP (Kindle Direct Publishing).

Does fpdf2 comply with PDF/X-1a?

[Lucas-C]

Hi and thank you for asking this question.

I'm discovering this standard just now. Quoting the Wikipedia page on PDF/X:

PDF/X is a subset of the PDF ISO standard. The purpose of PDF/X is to facilitate graphics exchange, and it therefore has a series of printing-related requirements which do not apply to standard PDF files. For example, in PDF/X-1a all fonts need to be embedded and all images need to be CMYK or spot colors.

As fpdf2 does not require all images to be CMYK (it usually inserts images with a /ColorSpace /DeviceRGB), I can quickly answer you: no, fpdf2 is currently not PDF/X-1a compliant.

I also checked a PDF document generated with fpdf2 with , with PDF/X-1a checkbox ticked, and this was the result:

Contributions would of course be welcome to allow fpdf2 to produce PDF/X-1a compliant documents.

For reference, I found some websites that list the criteria contained in the PDF/X-1a:2003 spec:

• https://www.prepressure.com/pdf/basics/pdfx-1a
• https://www.normaprint.fr/blog/pdfx-1a2003/ (French)

Also, an issue somehow related: #262

[dgl-dev]

Thanks, I'm going to try OpenOffice => PDF => Calibre => epub2 for KDP Books I'm told that KDP is all happy with OpenOffice => PDF So if I can copy pages in OpenOffice and save as PDF, I'm good to go If not of if it's funky, I'll get back about helping with the standards compliance Les Dunaway 770-490-7546 <http://voice.google.com/calls?a=nc,%2B17704907546>

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On Wed, May 4, 2022, at 16:12, Lucas Cimon wrote: Hi and thank you for asking this question. I'm discovering this standard just now. Quoting the Wikipedia page on PDF/X <https://en.wikipedia.org/wiki/PDF/X>: > PDF/X is a subset of the PDF <https://en.wikipedia.org/wiki/Portable_Document_Format> ISO <https://en.wikipedia.org/wiki/International_Organization_for_Standardization> standard. The purpose of PDF/X is to facilitate graphics exchange, and it therefore has a series of printing-related requirements which do not apply to standard PDF files. For example, in PDF/X-1a all fonts need to be embedded and all images need to be CMYK <https://en.wikipedia.org/wiki/CMYK> or spot colors <https://en.wikipedia.org/wiki/Spot_color>. > As `fpdf2` does not require all images to be CMYK (it usually inserts images with a `/ColorSpace /DeviceRGB`), I can quickly answer you: *no, fpdf2 is currently not PDF/X-1a compliant*. I also checked a PDF document generated with `fpdf2` with <https://bfo.com/blog/2017/11/08/verify_pdfa_online/>, with `PDF/X-1a` checkbox ticked, and this was the result: 2022-05-04 21_58_19-Verify PDFA online <https://user-images.githubusercontent.com/925560/166816183-1759ef7e-8241-4ea6-ba0b-902d816e742a.png> Contributions would of course be welcome to allow `fpdf2` to produce PDF/X-1a compliant documents. For reference, I found some websites that list the criteria contained in the `PDF/X-1a:2003` spec: * https://www.prepressure.com/pdf/basics/pdfx-1a * https://www.normaprint.fr/blog/pdfx-1a2003/ (French) Also, an issue somehow related: #262 <#262> — Reply to this email directly, view it on GitHub <#409 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AU4275WQRFNAHYOHO73CL2TVILK2FANCNFSM5VC7SVAA>. You are receiving this because you authored the thread.Message ID: ***@***.***>