Public function to generate AP for annot

[Liam McDermott]

Hello,

I believe pdfium has no public function that an API consumer could use to generate (and set) an annotation's appearance stream.

I'd like to propose an addition to pdfium's public API: a function that would take an annotation handle, and generate the appearance stream for that annotation.

Use case: In the pdfium-render project, we have limited support for filling PDF forms. However, since pdfium's API lacks a way to generate an appearance stream for a form widget, some viewers display the form as though it had not been filled (bug report, for context).

Is the pdfium project likely to accept a patch to add this function?

I'm attaching a WIP patch for early feedback. If the response here is positive, I can create an issue on the bug tracker.

Thank you for taking the time to consider this.

Kind Regards,

Liam McDermott.

[Lei Zhang]

Hi Liam,

It looks like you have spent some time investigating the pdfium-render issue. Can you file a PDFium bug upstream via https://crbug.com/pdfium/new and we can discuss it there? I haven't looked into the issue at all, so I can't say for sure yet if adding a new public API is the right solution or not.

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[Liam McDermott]

Hello Lei,

Thank you for the guidance! I have filed a bug here: https://issues.chromium.org/u/1/issues/348669339

Kind Regards,

Liam.

P.S. Nice e-mail address.