Cannot set int array option (gamma-table)

Open

#69 opened on May 13, 2021 0 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 5/5
Estimated time: Over a week
Newbie friendliness: 25/100

Issue type: Feature
Clarity: Needs clarification
Activity status: Stale
Tech stack: c, python
Domain: api

Research direction

Start with the scanimage option definitions and the Python-to-SANE option handling described in the issue, focusing on how integer options are converted and sized. Determine the design needed for array-valued options such as the red, green, and blue gamma tables; done means these SANE tables can be supplied instead of being rejected as single integers.

Written by the indexing model from the issue text.

Description

My scanner supports customisation of colour curve table. "scanimage" utility reports this option as

   --red-gamma-table 0..255,...
        Gamma-correction table for the red band.
    --green-gamma-table 0..255,...
        Gamma-correction table for the green band.
    --blue-gamma-table 0..255,...
        Gamma-correction table for the blue band.

It is an array of integers, SANE reports option size 1024. Alas, Python demands a single-value int/long option.

How can we support value tables?

Dominant language: C
Stars: 61
Forks: 22
PR merge metrics: No merged PRs in 30d

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