(No CMYK Color support) The colors of large image shift towards blue/green

[destroy314]

Environment:

• OS: macOS 14.2.1 (23C71) with Apple XDR Display (P3-1600 nits)
• qView version: 6.1

Information:
The left is the Preview.app, please note the file size in the title bar, this behavior is also found in large tif/psd files I have.
Change color space conversion has nothing to do with it.

[jurplel]

Interesting. Can you send the test images so I could reproduce it in the future?

[destroy314]

Oops, I forgot. GoogelDrive

[jdpurcell]

This is because the image uses CMYK color and Qt wasn't capable of handling it properly until recently. There were two recent changes (here and here), one or both of which has fixed the colors when I try this and other CMYK images in a Qt preview release. The bad news - I don't believe this is being cherry-picked back to Qt 6.7, in which case we'll have to wait until Qt 6.8 is released towards the end of the year.

[jurplel]

IMO another case for investigating a migration away from qt image processing