[Bug]: Incorrect rendering of type3 fonts

[THausherr]

Attach (recommended) or Link to PDF file

PDFIUM-362796158-type3.pdf

Web browser and its version

FF 136.0

Operating system and its version

Microsoft Windows [Version 10.0.19045.5555]

PDF.js version

v4.10.38

Is the bug present in the latest PDF.js version?

Yes

Is a browser extension

No

Steps to reproduce the problem

open file

What is the expected behavior?

What went wrong?

Link to a viewer

No response

Additional context

The red glow around the glyphs is missing.
Note that the resources are not in the charprocs, but in the font itself, e.g. at Root/Pages/Kids/[0]/Resources/Font/F8/Resources
The File is from the google pdfium error tracker.

[Snuffleupagus]

Note that the resources are not in the charprocs, but in the font itself, e.g. at Root/Pages/Kids/[0]/Resources/Font/F8/Resources

We're already preferring those /Resources and there are no warnings/errors about not being able to find resources, hence that may not actually be the source of the bug in our case; see

pdf.js/src/core/evaluator.js

Line 4656 in 1bc98df

const fontResources = this.dict.get("Resources") || resources;