https://bugs.kde.org/show_bug.cgi?id=487613
Bug ID: 487613
Summary: Fit to Window in Preview does not scale up smaller
images
Classification: Applications
Product: digikam
Version: 8.4.0
Platform: Other
OS: Other
Status: REPORTED
Severity: normal
Priority: NOR
Component: Preview-Image
Assignee: digikam-bugs-n...@kde.org
Reporter: carbonwer...@hotmail.com
Target Milestone: ---
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SUMMARY
While there are aspects of the Fit To Window option (for Preview) that seem to
work, some dont, and some behave in ways that make no sense (and are
inconsistent with mainstream image viewers- Faststone, ACDSee, Windows Photos,
the Adobe products I have, etc).
STEPS TO REPRODUCE
With a higher-resolution monitor (I run 2600x1900), images that are smaller
than some value (in the case being reported, an image that is 272 x 299 pixels)
is not affected at all by fit to window. Larger files (I dont know the cutoff)
seem to scale up OK, and images larger than the display area seem to scale down
properly. Ironically, in Thumbnail mode with scaling set to 100%, the thumbnail
of this image is significantly larger on screen than is the preview of the
file...
As for the other weirdness- if you mouse-wheel zoom in to force this image to
scale up, now sequential images ignore the fit-to-window config option- zoom is
retained; it seems that by manually zooming to bypass this problem, you cause
the fit-to-window setting to disable.
OBSERVED RESULT
As outlined in the steps-to-reproduce
EXPECTED RESULT
There is no case in a library where you would want this non-scaling to happen
if fit-to-window is enabled, where it remains possible to override that default
scaling via manual zoom modes.
If you have an icon etc that is blown out by the upscale, and you zoom out to
get a better idea of actual display, that doesnt imply anything about other
images. If fit-to-window is enabled, that should persist with an image change
during browsing a library. If it isnt desired, then the user should simply
disable the mode.
Perhaps, if there was real need, there could be a flag in the image or
thumbnail database that persists the last zoom mode, where if it is 0, that
means default to system setting, and if it is some positive value, that would
represent the last value the user selected as a custom zoom for that image etc.
So, at least then, if the user has a mix of images and icons etc, the system
would remember any manual zoom applied to a particular image. Maybe a keypress
restores that to 100% to save time after manual zoom ops.
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma:
(available in About System)
KDE Plasma Version:
KDE Frameworks Version:
Qt Version:
ADDITIONAL INFORMATION
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