python-pillow / python-pillow/Pillow
Support scan script selection for `progressive` argument
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- Dominant language
- Python
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Description
This is a feature request. Apologies if it already exists and please direct me to the right option.
For the JPEG progressive option, the current code calls jpeg_simple_progression at https://github.com/python-pillow/Pillow/blob/fdbd719da4c77c7e23e2e9e9b71d0d177f2d3369/src/libImaging/JpegEncode.c#L218
Would it be possible to support an argument to specify the scan script to use?
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start in src/libImaging/JpegEncode.c at the jpeg_simple_progression call, then trace how the JPEG progressive option reaches that encoder. Determine how a caller could select a scan script and identify the relevant tests or test entry points before changing the API. Done means the progressive option accepts a scan-script selection and uses it when encoding JPEGs.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- c, python
- Domain
- computer-vision
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 30/100