https://bugs.kde.org/show_bug.cgi?id=475817

            Bug ID: 475817
           Summary: Screenshots are low resolution and unreadable, even
                    when expanded
    Classification: Applications
           Product: Discover
           Version: 5.27.8
          Platform: Fedora RPMs
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: discover
          Assignee: plasma-b...@kde.org
          Reporter: yumpusamongus+...@gmail.com
                CC: aleix...@kde.org
  Target Milestone: ---

Created attachment 162415
  --> https://bugs.kde.org/attachment.cgi?id=162415&action=edit
screenshot of discover showing a zoomed screenshot for org.kde.kmymoney.desktop

SUMMARY

App screenshots are low resolution and unreadable, even when expanded

STEPS TO REPRODUCE
1. Go to the details page of any app in Discover.
2. Click on a screenshot to see the full size.

OBSERVED RESULT

The "expanded" screenshot is still some low-res downscale.

EXPECTED RESULT

The expected screenshot is full native resolution.

SOFTWARE/OS VERSIONS

Operating System: Fedora Linux 38
KDE Plasma Version: 5.27.8
KDE Frameworks Version: 5.110.0
Qt Version: 5.15.10
Kernel Version: 6.5.6-200.fc38.x86_64 (64-bit)
Graphics Platform: Wayland

ADDITIONAL INFORMATION

I'm not entirely sure what provides these screenshots, but comments on Bug
455304 and Bug 400430 suggest they're from the appstream metadata.  But if I
run `appstreamcli dump org.kde.kmymoney.desktop`, the default screenshot has
these files available:

    <image
type="source">https://cdn.kde.org/screenshots/kmymoney/kmymoney.png</image>
    <image type="thumbnail" width="624"
height="351">https://dl.flathub.org/repo/screenshots/org.kde.kmymoney-stable/624x351/org.kde.kmymoney-91c6b8619ee53c713b40b73fbac661e5.png</image>
    <image type="thumbnail" width="112"
height="63">https://dl.flathub.org/repo/screenshots/org.kde.kmymoney-stable/112x63/org.kde.kmymoney-91c6b8619ee53c713b40b73fbac661e5.png</image>
    <image type="thumbnail" width="224"
height="126">https://dl.flathub.org/repo/screenshots/org.kde.kmymoney-stable/224x126/org.kde.kmymoney-91c6b8619ee53c713b40b73fbac661e5.png</image>
    <image type="thumbnail" width="752"
height="423">https://dl.flathub.org/repo/screenshots/org.kde.kmymoney-stable/752x423/org.kde.kmymoney-91c6b8619ee53c713b40b73fbac661e5.png</image>

There is a native resolution source image available, which is obviously what
should be used, but the image discover shows is much smaller.  It doesn't match
the scale of any of the options, so if it's not scaled from source, it might
have even been scaled TWICE.

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