Bug: images with transparency broken in laser project

[iloving]

🐞 bug report

I have a PNG with a round image that I am trying to precisely place onto the material I am engraving. However when I try to import the PNG, it loads fine for a second, and then suddenly the transparent background becomes completely white. This blocks the background picture I took of the material and makes it impossible to position the image.

I've also tried saving the image as an SVG, but when Luban loads it, it complains that the image is larger than the work surface and then doesn't display the image at all.

This has completely blocked me from completing my project. I have attached the images in question for review. I have confirmed that the issue persists in CNC mode as well, so this appears to be a problem with how Luban is handling images with transparency.

Affected Version(s)

The issue is caused by version x.y.z

4.7.3

Is this a regression? (optional)

Unknown

To Reproduce

Steps to reproduce the behavior:

1. Import one of the images into a laser project.

Expected behavior

If an image has a transparent background, I expect Luban to respect that transparency when loaded.

🌍 Your Environment

Platform:

- Operating System: Mac OS 13.3.1
- Printer: Artisan