Form field text values too large

[BHSPitMonkey]

Link to PDF file (or attach file here): detect-form-fields.pdf

Configuration:

• Web browser and its version: Firefox 46.0.1
• Operating system and its version: Ubuntu 16.04
• PDF.js version: 1.3.231
• Is an extension: No

Steps to reproduce the problem:

1. Open PDF
2. Look at entered text in form sections 8a and 9a

What is the expected behavior? Text is correct size:

What went wrong? Text is very large:

PdfBug console output:

11:56:13.291 PDF ef2293a3b9f4e0accbef97ee38798a2c [1.3 Mac OS X 10.11.1 Quartz PDFContext / Amgraf OneForm Designer Plus] (PDF.js: 1.3.231)1 viewer.js:6800:7
11:56:13.292 Warning: AcroForm/XFA is not supported1 viewer.js:6824:9
11:56:13.424 Warning: Unimplemented annotation type "FreeText", falling back to base annotation1 pdf.worker.js:9407:5
11:56:13.806 Warning: fontRes not available1 pdf.worker.js:9407:5 (logged 54 times)
11:56:13.898 Warning: Error during font loading: Font Helvetica-Bold is not available1 pdf.js:368:5

[hveit]

I have a similiar problem, but I do not yet know what to do about it:
If this is a problem with AcroForms support within PDF.js, why is this ticket (https://github.com/mozilla/pdf.js/projects/1) resolved/closed while this one here is still open?

I can still reproduce this in version 2.3.171.
Is there a chance to circumvent the problem somehow, i.e. by installing fonts etc.?

[THausherr]

The problem with the file here is that the appearance streams are missing. /NeedAppearances is set so the viewer should generate them. In the field "f1_13(0)" the /DA (default appearance) is "/Helvetica-Bold 9 Tf 0 g". However the font "Helvetica-Bold" does not exist in in the Acroform default resources of the PDF (I suspect that the PDF was poorly merged from a cover page and the original SS4 form). So PDF.js makes some decision about what font to use, and from the screeenshot this looks like Comic Sans 🤣

@hveit make sure that the software that generates / fills the PDF also creates the appearance streams of the fields. If you're not sure what is going on, create a new issue here.

[hveit]

@THausherr thanks for the explanation.
Can you confirm, that it is the same problem with my PDF file from issue #11151?

[THausherr]

@hveit I'll answer there. It is somewhat different, in that PDF the font is available in the AcroForm default resources.

[automatedbugreportingfacility]

This looks much better now, but the values are cut off a little: