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Bug 690441 - desktop image thumbnail resize blurry
desktop image thumbnail resize blurry
Status: RESOLVED OBSOLETE
Product: nautilus
Classification: Core
Component: Desktop
3.6.x
Other Linux
: Normal normal
: ---
Assigned To: Nautilus Maintainers
Nautilus Maintainers
Depends on:
Blocks:
 
 
Reported: 2012-12-18 18:46 UTC by Aaron Brubacher
Modified: 2018-01-02 18:46 UTC
See Also:
GNOME target: ---
GNOME version: ---


Description Aaron Brubacher 2012-12-18 18:46:21 UTC 
When I resize an image on the desktop larger, it becomes blurry because the thumbnail stretches. This was working properly not that long ago. Zooming in within a regular nautilus window works fine, but the desktop thumbnail resize does not. Icons (vector) resize fine, it's just images.

I looked around and found the previous bugs about this, it seems like its supposed to be fixed by now. I think its a regression, unless there's some setting? I already tried removing the .thumbnails folder and restarting nautilus.

Nautilus 3.6.3 on Ubuntu 12.10 x64 with gnome-shell 3.6.2

Old report of same issue: https://bugzilla.gnome.org/show_bug.cgi?id=48176
on launchpad: https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/1089449
Comment 1 Aaron Brubacher 2013-01-06 22:37:31 UTC 
I had a look at this, it seems that even though the code is set to load the original file when the thumbnail was stretched, it was still limited to a size of 256, which looked blurry when stretched to the largest size of 426px on my machine.
In nautilus-directory-async.c:thumbnail_loader_size_prepared(), I replaced

max_thumbnail_size = NAUTILUS_ICON_SIZE_LARGEST * cached_thumbnail_size / NAUTILUS_ICON_SIZE_STANDARD;

with

max_thumbnail_size = NAUTILUS_ICON_MAXIMUM_SIZE * cached_thumbnail_size / NAUTILUS_ICON_SIZE_STANDARD;

Which tested successfully on my machine, although of course I do not know if this is the desired solution.
Comment 2 António Fernandes 2018-01-02 18:46:14 UTC 
Starting with version 3.28, nautilus will not handle the "files on desktop background" feature. For better alternatives, read this blog post https://csorianognome.wordpress.com/2017/12/21/nautilus-desktop-plans/