| Summary: | Images look slightly blurry with zoom level < 100% | ||
|---|---|---|---|
| Product: | [Applications] gwenview | Reporter: | Jan Rathmann <jan.rathmann> |
| Component: | general | Assignee: | Gwenview Bugs <gwenview-bugs-null> |
| Status: | ASSIGNED --- | ||
| Severity: | normal | CC: | vasua.ukraine |
| Priority: | NOR | ||
| Version First Reported In: | 20.08.2 | ||
| Target Milestone: | --- | ||
| Platform: | Other | ||
| OS: | Linux | ||
| Latest Commit: | Version Fixed/Implemented In: | ||
| Sentry Crash Report: | |||
| Attachments: |
Patch to make Gwenview render images more sharply
Example of blurry rendering in Gwenview, view at 100% Example of sharper rendering in Firefox, view at 100% Example of sharper rendering in patched Gwenview, view at 100% |
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Created attachment 156310 [details]
Example of blurry rendering in Gwenview, view at 100%
Created attachment 156311 [details]
Example of sharper rendering in Firefox, view at 100%
Created attachment 156312 [details]
Example of sharper rendering in patched Gwenview, view at 100%
A possibly relevant merge request was started @ https://invent.kde.org/graphics/gwenview/-/merge_requests/229 *** Bug 501351 has been marked as a duplicate of this bug. *** |
Created attachment 156309 [details] Patch to make Gwenview render images more sharply SUMMARY Some images (photos) look slightly blurry when they are displayed with a zoom level < 100% (this is the default if I simply open an image file that has a higher resolution than my screen). STEPS TO REPRODUCE 1. Open a photo in Gwenview with small, fine-grained details. OBSERVED RESULT Photo looks slightly blurry. (see attached screenshot, view at 100%) EXPECTED RESULT Photo looks "sharp". (see attached screenshot of the same image displayed by Firefox, view at 100%) ADDITIONAL INFORMATION I discovered this problem by developing RAW files in darktable, wondering why the image looks sharp in darktable but a bit blurry in Gwenview. I compared the rendering of Gwenview with: * Firefox * digiKam * Eye of Gnome On all of them it looks "good/sharp". I get a sharp rendering in Gwenview by replacing Qt::SmoothTransformation with Qt::FastTransformation in one function, see attached patch.