api: Form fill fails with forms produced with Adobe Acrobat about pdfcpu HOT 5 CLOSED

Hi!
Understood!
Can you provide a little test file then I can provide a fix.

from pdfcpu.

test1.pdf

File is attached - created with Adobe Acrobat, latest version 2024.002.20687.

Created from scratch. Has only 2 tx fields: firstname, lastname.

PDFCPU fails with error: dict=type1FontDict required entry=FirstChar missing.

The following config used:

conf := new(model.Configuration)
conf.NeedAppearances = true
conf.Reader15 = true
conf.ValidationMode = model.ValidationStrict

If I switch to a relaxed validation, the error doesn't happen, but the created filled PDF is created corrupted and cannot be opened by any PDF reader (neither by Acrobat Reader, not by Chrome/Edge reades).

from pdfcpu.

result_relaxed.pdf

attached is corrupted file created with relaxed validation:

conf := new(model.Configuration)
conf.NeedAppearances = true
conf.Reader15 = true
conf.ValidationMode = model.ValidationRelaxed

from pdfcpu.

no problem filling your PDF using the CLI.

As far as API:
pdfcpu is providing appearance streams and stick with ValidationRelaxed.
In general you should be fine by just doing conf := api.LoadConfiguration()

from pdfcpu.

It works with just:

conf := api.LoadConfiguration()

Thank you very much!!

from pdfcpu.