jimp-dev/jimp

converting tiff to jpeg returns black image with only a thin line of the very upper part of the original image

Open

#985 创建于 2021年1月27日

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 (0 评论) (0 反应) (0 负责人)JavaScript (13,218 star) (785 fork)batch import
bughelp wanted

描述

Expected Behavior

return a copy if the tiff image converted to jpeg

a jpeg image

Current Behavior

jimp returns a black image with only a thin line of the very upper part of the original image

Failure Information (for bugs)

Steps to Reproduce

Screenshots

Context

  • Jimp Version:
  • Operating System:
  • Node version:

Failure Logs

贡献者指南

技术栈
javascript
领域
backend
议题类型
bug
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
1-3 hours
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
stale
清晰度议题是否清楚说明期望改动、验收标准和下一步。
needs investigation
前置要求
Node.jsJimp basics
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
30
研究方向
Investigate the TIFF to JPEG conversion path in Jimp. Start by examining the TIFF decoder and JPEG encoder in the source code (likely in packages/jimp/src or similar). Check if the issue is related to color space handling, alpha channel, or image dimensions. Reproduce with a sample TIFF image to isolate whether the problem is in reading TIFF or writing JPEG. Look for any existing tests for TIFF conversion and ensure the bug is reproducible with the provided code snippet.