jimp-dev/jimp

Multipage TIFFs only return first page

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#816 opened on Nov 18, 2019

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 (1 comment) (2 reactions) (0 assignees)JavaScript (13,218 stars) (785 forks)batch import
bughelp wanted

Description

Expected Behavior

When reading a TIFF file with multiple pages, I would expect the buffer from each page to be available.

Current Behavior

Only the first page of the multiple page TIFF file is returned.

Contributor guide

Tech stack
javascriptnodejs
Domain
backend
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
JavaScriptNode.jsTIFF format basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
35
Research direction
The issue is about supporting multipage TIFFs. The current TIFF parser in Jimp only returns the first page. To fix this, look at the TIFF plugin code (likely in packages/plugin tiff) and modify the decoding logic to iterate over all image file directories (IFDs) in the TIFF file. Ensure the buffer for each page is exposed in a way consistent with Jimp's API. Review any existing comments or linked PRs for additional context.