OpenPrinting/libcupsfilters

Stars: 17
Forks: 71
Open beginner issues: 0
Indexed issues: 55
Avg merge: 2d 17h
Merged PRs (30d): 13

Dominant language: C
License: Apache-2.0
Last GitHub push: Sep 16, 2026
Latest indexed: Sep 20, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

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55 open issues indexed

Intermittent empty Apple Raster output from PDF filter chain causes Samsung SPL timeout Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

OpenPrinting/libcupsfilters#250 · 8 comments · Opened Sep 15, 2026
pdftopdf exits with status 1 (no error message) on PDFs with form fields lacking /N and /BBox Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

OpenPrinting/libcupsfilters#246 · 4 comments · Opened Sep 11, 2026
Support for blank MFG in device ID needed, such printers exist Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

OpenPrinting/libcupsfilters#244 · Opened Sep 11, 2026
libcupsfilters-2.2.1-4.4 breaks compatibility Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

OpenPrinting/libcupsfilters#242 · 2 comments · Opened Sep 9, 2026
The `--input-page-ranges` option needs to be ported to current, PDFio-based libcupsfilters Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

OpenPrinting/libcupsfilters#241 · 2 comments · Opened Sep 8, 2026
[Fedora45] libcupsfilters‑2.2.1‑2 has a series of printing issues. Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

OpenPrinting/libcupsfilters#239 · 9 comments · 1 reaction · Opened Sep 8, 2026
[Regression 2.1.1 → 2.2.x] pdftopdf no longer emits its `%%PDFTOPDF*` marker comments, so libppd re-applies `page-ranges` and silently drops pages Open

Difficulty 4/5 3-5 days Newbie friendliness 72/100

OpenPrinting/libcupsfilters#233 · 1 comment · 1 reaction · Opened Sep 4, 2026
[Regression 2.1.1 → 2.2.1] Copy count lost for uncollated jobs: no -dNumCopies, single copy printed Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

OpenPrinting/libcupsfilters#231 · 2 comments · Opened Sep 3, 2026
pdftopdf (cfFilterPDFToPDF): pages whose /Resources dictionary has a duplicated key are dropped — regression in 2.2.x (PDFio migration) Open

Difficulty 4/5 3-5 days Newbie friendliness 63/100

OpenPrinting/libcupsfilters#230 · 9 comments · 2 reactions · Opened Sep 2, 2026
pdftopdf (cfFilterPDFToPDF) no longer generates soft copies with `*cupsManualCopies: True` — regression in libcupsfilters 2.2.x Open

Difficulty 4/5 3-5 days Newbie friendliness 65/100

OpenPrinting/libcupsfilters#226 · 1 comment · Opened Aug 31, 2026
texttopdf embeds a font without checking it covers the text, printing every glyph as .notdef Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

OpenPrinting/libcupsfilters#224 · 1 comment · Opened Aug 31, 2026
cfFilterGhostscript: duplex DM3 (Rotated) emits -dcupsInteger1=4294967295; Ghostscript appleraster rangecheck Open

Difficulty 1/5 1-3 hours Newbie friendliness 85/100

OpenPrinting/libcupsfilters#222 · 2 comments · 1 reaction · Opened Aug 30, 2026
libcupsfilters 2.2.1-2 breaks custom continuous media on Brother QL-820NWB Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

OpenPrinting/libcupsfilters#217 · 5 comments · Opened Aug 29, 2026
texttotext: page-size integer overflow causes a heap-buffer-overflow Open

Difficulty 4/5 3-5 days Newbie friendliness 62/100

OpenPrinting/libcupsfilters#198 · 3 comments · Opened Aug 2, 2026
texttopdf: prettyprint without wrapping corrupts the page heap Open

Difficulty 3/5 1-2 days Newbie friendliness 74/100

OpenPrinting/libcupsfilters#197 · Opened Aug 2, 2026
texttopdf: comment token across a page boundary writes before the page buffer Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

OpenPrinting/libcupsfilters#196 · Opened Aug 2, 2026
texttopdf: column-layout integer overflow causes heap out-of-bounds access Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

OpenPrinting/libcupsfilters#195 · Opened Aug 2, 2026
pwgtopdf: a truncated raster row is copied from uninitialized heap memory Open

Difficulty 3/5 1-2 days Newbie friendliness 74/100

OpenPrinting/libcupsfilters#191 · Opened Aug 2, 2026
pdftopdf: more than 10,000 output pages corrupt fixed scheduler state Open

Difficulty 4/5 3-5 days Newbie friendliness 65/100

OpenPrinting/libcupsfilters#189 · Opened Aug 2, 2026
pdftopdf: freed annotation XObject name remains in a PDFio dictionary Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

OpenPrinting/libcupsfilters#188 · Opened Aug 2, 2026
pdftopdf: missing annotation rectangle leaves an uninitialized pointer Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

OpenPrinting/libcupsfilters#187 · Opened Aug 2, 2026
PCLm unsupported rotation UAF and double free Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

OpenPrinting/libcupsfilters#186 · Opened Aug 2, 2026
pclmtoraster: declared image dimensions exceed decoded stream storage Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

OpenPrinting/libcupsfilters#185 · Opened Aug 2, 2026
imagetoraster: RGB16 row-size multiplication wraps before allocation Open

Difficulty 4/5 3-5 days Newbie friendliness 58/100

OpenPrinting/libcupsfilters#184 · Opened Aug 2, 2026
imagetopdf: failed TIFF scanline read leaks heap contents into PDF Open

Difficulty 3/5 1-2 days Newbie friendliness 65/100

OpenPrinting/libcupsfilters#183 · Opened Aug 2, 2026
imagetopdf: page-count multiplication undersizes page-object state Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

OpenPrinting/libcupsfilters#182 · Opened Aug 2, 2026
bannertopdf: untrusted Template path exposes local PDF content Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

OpenPrinting/libcupsfilters#181 · Opened Aug 2, 2026
texttotext: accepted zero tab width causes division by zero Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

OpenPrinting/libcupsfilters#180 · Opened Aug 2, 2026
texttotext: first-word wrapping reads before the page buffer Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

OpenPrinting/libcupsfilters#179 · Opened Aug 2, 2026
texttopdf: truncated UTF-8 title overruns make_wide() allocation Open

Difficulty 3/5 1-2 days Newbie friendliness 70/100

OpenPrinting/libcupsfilters#178 · Opened Aug 2, 2026
pwgtopclm: zero preferred strip height causes division by zero Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

OpenPrinting/libcupsfilters#177 · Opened Aug 2, 2026
pdftopdf: unbounded number-up overflows a fixed stack layout Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

OpenPrinting/libcupsfilters#176 · Opened Aug 2, 2026
pdftopdf: form flattening indexes past the resource map Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

OpenPrinting/libcupsfilters#175 · Opened Aug 2, 2026
pclmtoraster: malformed XObject reaches strcmp(NULL, "image") Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

OpenPrinting/libcupsfilters#174 · Opened Aug 2, 2026
pclmtoraster: stream error becomes a SIZE_MAX copy Open

Difficulty 4/5 3-5 days Newbie friendliness 68/100

OpenPrinting/libcupsfilters#173 · Opened Aug 2, 2026
imagetoraster: packed 2-bit RGB TIFF scanline is read as bytes Open

Difficulty 4/5 3-5 days Newbie friendliness 62/100

OpenPrinting/libcupsfilters#172 · Opened Aug 2, 2026
cfFilterPWGToPDF continues after page preparation fails Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

OpenPrinting/libcupsfilters#166 · 1 comment · Opened Jul 19, 2026
cfFilterPWGToRaster divides by zero for zero input resolution Open

Difficulty 2/5 1-3 hours Newbie friendliness 74/100

OpenPrinting/libcupsfilters#165 · 1 comment · Opened Jul 19, 2026
Linking with libcups3 causing segfault Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

OpenPrinting/libcupsfilters#151 · 1 comment · Opened Jun 7, 2026
`imagetoraster`: heap-buffer-overflow in `cupsfilters/image-zoom.c:273` with small grayscale PNG Open

Difficulty 4/5 3-5 days Newbie friendliness 68/100

OpenPrinting/libcupsfilters#148 · 2 reactions · Opened Jun 1, 2026
Heap-buffer-overflow READ in pdftoraster.c write_page_image() Open

Difficulty 3/5 1-2 days Newbie friendliness 63/100

OpenPrinting/libcupsfilters#145 · Opened Apr 29, 2026
NULL-related ASAN reports Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

OpenPrinting/libcupsfilters#144 · Opened Apr 24, 2026
Heap buffer overflow(read) in _cfImageReadTIFF Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

OpenPrinting/libcupsfilters#116 · Opened Jan 23, 2026
rasterize pdf that embeds non-regular dpi image using `cupsfilter` introduces nearest-neighbor like aliasing artifacts. Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

OpenPrinting/libcupsfilters#111 · 4 comments · Opened Dec 27, 2025
Provide translation for internal function from bannertopdf filter Open

Difficulty 2/5 1-3 hours Newbie friendliness 52/100

OpenPrinting/libcupsfilters#110 · 2 comments · Opened Dec 18, 2025
Ghostcript used to find the number of pages on output could fail Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

OpenPrinting/libcupsfilters#98 · 3 comments · Opened Aug 28, 2025
bannertopdf filter produce unreadable symbols Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

OpenPrinting/libcupsfilters#112 · 8 comments · Opened Jul 7, 2025
Paper sizes that do not support borderless printing are displayed as the paper sizes for borderless printing in the print dialog. Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

OpenPrinting/libcupsfilters#89 · Opened May 8, 2025
Arabic glyphs are not joined together by texttopdf Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

OpenPrinting/libcupsfilters#88 · 5 comments · Opened Apr 10, 2025
In Ubuntu 24.04 OS PCL6 printer driver print is failing using gstopxl filter Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

OpenPrinting/libcupsfilters#78 · 2 comments · Opened Jan 27, 2025

A short digest of beginner-friendly GitHub issues.