Convert BMP to JPG and resulted image has incorrect color

[railsstudent]

Expected Behavior

The converted JPG image should maintain the same color scheme.

Current Behavior

The colors of the converted JPG image fall in the red spectrum

Failure Information (for bugs)

Screenshots

Original image

Outputted image

Steps to Reproduce

• Jimp Version: 0.16.1
• Operating System: Unbuntu
• Node version: v10.18.1

Failure Logs

[railsstudent]

• Find a free JPG image.
• Use https://image.online-convert.com/convert-to-bmp to upload the JPG image to convert to BMP
• Execute the small nodeJS program to convert it back to JPG
• Our application supports logo upload and one of the supported formats is BMP. Then, the logo is rendered to pdf document using PdfMake library. Unfortunately, PdfMake library does not support BMP and the workaround is to convert it to JPG and render in the PDF.

1. Write a small node program to convert a bmp image to JPG const filename = 'siblings.bmp' var Jimp = require('jimp');

Jimp.read(filename, (err, lenna) => { if (err) throw err; lenna .write(lena-small-bw4-${Date.now()}.jpg); // save });

2. Execute the node program: node bmp-jpg.js
3. Open the JPG image and the colors of the image are converted to red unexpectedly

[Mitolius]

I have the same problem converting bitmap to png. It works with 24bits bitmap but I have incorrect color result for 1, 4, 8, 16 (unsupported), 32 bits bitmap. Help appreciate.