BMP image changes colour when loaded by JIMP

[GeoMarkou]

Expected Behavior

Colour of BMP image shouldn't change.

Current Behavior

The reds turn to green, and the blues turn to red.

Failure Information (for bugs)

Seems related to the endian of the BMP perhaps?

Steps to Reproduce

I have a replication of this bug in a code sandbox. After reading the bmp and turning it into a base64 it changes the colours. I've included the image in the sandbox.

https://codesandbox.io/s/angry-gauss-nnd63?fontsize=14&hidenavigation=1&theme=dark

Screenshots

Context

We have a part of our application where users can upload their own images and apply filters to them. Some user images may be in BMP format.

• Jimp Version: codesandbox's
• Operating System: Windows 10
• Node version: codesandbox's

Failure Logs

n/a

[aecostas]

Same here. In my case red is converted to yellow/orange; and black to red

@GeoMarkou, do you know any previous version where it worked?

[GeoMarkou]

@aecostas I just noticed this issue recently, not sure when this behaviour would have changed.

If JIMP uses bmp-js like this pull request suggests (#530), I found a maybe-relevant issue on bmp-js itself (shaozilee/bmp-js#16)