jimp-dev/jimp

Autorotate based on exif not working

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#920 opened on Jul 30, 2020

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 (7 comments) (6 reactions) (0 assignees)JavaScript (785 forks)batch import
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Description

Both in the browser and in node, Jimp is not autorotating based on exif. I'm using Jimp.read(buffer), does autorotate not work with buffers?

Here's the typescript code let image = await Jimp.read(buffer); let photo = await image.cover( 1920. 1920, Jimp.HORIZONTAL_ALIGN_CENTER | Jimp.VERTICAL_ALIGN_MIDDLE, ); buffer = await photo.getBufferAsync(Jimp.MIME_JPEG);

the buffer then contains an image with the rotation exif information stripped out, but not rotated properly. This also happened on 0.13.0.

Contributor guide

Research direction
Investigate the autorotate method in Jimp and trace its behavior when reading images from buffers. Compare with file based reads to identify missing EXIF rotation application.
Tech stack
javascript
Domain
full stack
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
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Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
JavaScript
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75