bug: incomplete redaction of vector graphics (line art)

[mahlzahn]

Description of the bug

Although the “drawings” in the sample PDF attached, are not visible, they may in the worst case contain sensible information and should probably be removed, too, when applying redactions.

How to reproduce the bug

With attached incomplete_redaction_sample.pdf, do

from pymupdf import *
dx = Document("incomplete_redaction_sample.pdf")
dx[0].add_redact_annot(Rect(FZ_MIN_INF_RECT, FZ_MIN_INF_RECT, FZ_MAX_INF_RECT, FZ_MAX_INF_RECT), fill=False)
dx[0].apply_redactions(graphics=2)
dx[0].get_drawings()

This returns still 4 drawings …

PyMuPDF version

1.27.1

Operating system

Linux

Python version

3.14

[JorjMcKie]

redaction.zip

MuPDF issue link: https://bugs.ghostscript.com/show_bug.cgi?id=709237

[mahlzahn]

Here a list of example files where I found the issue, too:

From https://github.com/ArtifexSoftware/tests/tree/master/pdf

Bug6901014_CityMap-evince-pdftopdf.pdf
Bug6901014_CityMap-evince.pdf
Bug6901014_CityMap-evince.simplified.pdf
Bug6901014_CityMap.pdf
cmyk_blend.pdf
rgb_blend.pdf
singlemask.pdf
smask_noicc.pdf
smask_withicc.pdf

From https://github.com/pymupdf/PyMuPDF/tree/main/tests/resources

test_2904.pdf
test_2957_1.pdf
test_3448.pdf
test_3450.pdf
test_3594.pdf
test_3806.pdf
test_3848.pdf

[JorjMcKie]

The MuPDF team has developed / is developing a fix. Let's see how this works out.