https://bugs.kde.org/show_bug.cgi?id=452528
Bug ID: 452528 Summary: Reference images cause low canvas FPS when taking up a large part of the screen. Product: krita Version: nightly build (please specify the git hash!) Platform: Microsoft Windows OS: Microsoft Windows Status: REPORTED Severity: normal Priority: NOR Component: Tools/Reference Images Assignee: krita-bugs-n...@kde.org Reporter: i...@ralek.art Target Milestone: --- 5.1.0-prealpha (git af77a5f) But I've noticed this as far back as 4 When having any sized reference image up, if you zoom too far in while the ref is still on-screen, the FPS can drop as low as 10% of the normal canvas FPS (220 down to 22). To reproduce: - Open a canvas - paste or open a reference image of any size - monitor canvas FPS when panning at various zoom levels on the ref image. Things that affect the FPS directly: - The relative resolution of the canvas docker on the screen (4k screens and full-screen mode have it bad, less noticeable on 1080p screens.) - The percentage of the screen taken up by the reference image. (This variable can go over 100% if more than one reference image is overlaid on top of each other, try placing 5 refs in the same place and make them take up the full screen. Things that DON'T seem to affect the FPS directly: - Canvas zoom level - Scale of the reference image - resolution of the reference image (2000x2000 vs 10x10) - Total number of refs (only percentage of screen taken up) - Color mode or channels of ref images - Whether they're referenced to a file or copied off clipboard - Whether they're overlaid on or off the side of the canvas -- You are receiving this mail because: You are watching all bug changes.