https://bugs.kde.org/show_bug.cgi?id=420173
Bug ID: 420173
Summary: thumbnail.so eats tons of memory with large GeoTiff
Product: kio-extras
Version: 19.12
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Thumbnails and previews
Assignee: plasma-b...@kde.org
Reporter: manisan...@gmail.com
Target Milestone: ---
Created attachment 127598
--> https://bugs.kde.org/attachment.cgi?id=127598&action=edit
Patch
SUMMARY
Put any huge image in a folder (im my case a 111320 x 66792 GeoTiff), launch
dolphin and browse to that folder or its parent, and watch thumbnail.so eat up
memory.
The cause is that QImageReader in ImageCreator::create (imagecreator.cpp) will
read the entire raw image, in this needing I suppose like 27GB of memory.
The easiest remedy would be to just limit the size of the images
ImageCreator::create will actually process, like to max 10240 in either
dimension. Proposed trivial patch attached.
Note: QImageReader::setScaledSize reportedly works for some formats to directly
read a downscaled image, but it does not seem to be the case with the qtiff
driver.
SOFTWARE/OS VERSIONS
kio-extras-19.12.3
Fedora Rawhide
Qt 5.14.2
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