When printing with driverless, the “print-content-optimize” setting does not work

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#60 opened on Jul 25, 2025 3 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 4/5
Estimated time: 3-5 days
Newbie friendliness: 42/100

Issue type: Bug
Clarity: Mostly clear
Activity status: Stale
Tech stack: c
Domain: backend

Research direction

Inspect cups/ppd-cache.c around line 145 and trace how the driverless PPD option reaches the ipp-backend. Reproduce the print-content-optimize=text case from the issue, then verify that PAPPL receives the selected value without filtering it out.

Written by the indexing model from the issue text.

Description

Describe the bug
When printing with driverless, the “print-content-optimize” setting does not work

To Reproduce
Steps to reproduce the behavior:

Add a printer "fooA" in the legacy-printer-app
Add a driverless for the "fooA"
Open any document by evnice and print the doucment with the "print-content-optimize" = "text"
PAPPL cannot receive the "print-content-optimize" value.

Expected behavior
PAPPL can receive the value of "print-content-optimize".

System Information:

OS: [Ubuntu24.04]
Version of CUPS, libcupsfilters, ...
CUPS: 2.4.7
libcupsfilters: 2.0.0
PAPPL: 1.4.9

Additional context

The "print-content-optimize" option generated by driverless is as follows

*OpenUI *print-content-optimize/Print Optimization: PickOne
*OrderDependency: 10 AnySetup *print-content-optimize
*Defaultprint-content-optimize: auto
*print-content-optimize auto/Automatic: ""
*print-content-optimize graphic/Graphics: ""
*print-content-optimize photo/Photo: ""
*print-content-optimize text-and-graphic/Text and Graphics: ""
*print-content-optimize text/Text: ""
*CloseUI: *print-content-optimize

Everywhere does not generate the "print-content-optimize" option.
"print-content-optimize" setting is filtered out when printing via ipp-backend.https://github.com/OpenPrinting/cups/blob/c83115cc35d6ec865a405260f0c61d372804be4e/cups/ppd-cache.c#L145

Dominant language: C
Stars: 5
Forks: 29
PR merge metrics: No merged PRs in 30d

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