Bug 508608

Summary: Feature request: make the preview canvas update live on color adjustments
Product: [Applications] Skanlite Reporter: Gregorplanet <gregorplanet>
Component: generalAssignee: Kåre Särs <kare.sars>
Status: RESOLVED INTENTIONAL    
Severity: wishlist    
Priority: NOR    
Version First Reported In: 25.08.0   
Target Milestone: ---   
Platform: Fedora RPMs   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Gregorplanet 2025-08-22 13:37:03 UTC
The color adjustment settings in Skanlite do not update in realtime on the canvas, which makes this feature kinda unusable. Currently you have to take a new scanning preview every time you want to adjust colors and wait a few seconds for it to finish.

A live updating preview canvas regarding changes in „Image Intensity“ section of „Advanced Options“ would be really useful. I would really appreciate it if this could be implemented.
Comment 1 Kåre Särs 2025-08-22 14:22:00 UTC
Thanks for the feature request!

The current color adjustments are all done in the drivers or the actual hardware. If Skanlite/Skanpage would do adjustments in the preview, the actual final results might be quite different from the preview. Especially the brightness, that can be adjusted with the light-source of the scanner, can have very unpredictable results. To not give fake/wrong impressions, this has intentionally not been implemented.

Sorry,
  Kåre
Comment 2 Gregorplanet 2025-08-22 15:07:58 UTC
(In reply to Kåre Särs from comment #1)
> Thanks for the feature request!
> 
> The current color adjustments are all done in the drivers or the actual
> hardware. If Skanlite/Skanpage would do adjustments in the preview, the
> actual final results might be quite different from the preview. Especially
> the brightness, that can be adjusted with the light-source of the scanner,
> can have very unpredictable results. To not give fake/wrong impressions,
> this has intentionally not been implemented.
> 
> Sorry,
>   Kåre

ahh i see, thanks for the reply. i'm just wondering, because XSane is able to preview these color adjustments instantly