[dolphin] [Bug 388660] Feature Request: Increase max icon thumbnail size

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=388660

Nate Graham  changed:

   What|Removed |Added

 Resolution|--- |DUPLICATE
 Status|CONFIRMED   |RESOLVED

--- Comment #11 from Nate Graham  ---
Seems the original issue regarding HiDPI is fixed and was a local configuration
issue. Because of the embedded request for a 512px icon size option, I'm
marking this a duplicate of Bug 368954, which requests the same thing, but it's
older and the request is clearer in there.

Toby, if you have any further issues, please file new bugs to track them
individually. See
https://community.kde.org/Get_Involved/Bug_Reporting#One_issue_per_bug_report

*** This bug has been marked as a duplicate of bug 368954 ***

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[dolphin] [Bug 388660] Feature Request: Increase max icon thumbnail size

[Dr . Chapatin]

https://bugs.kde.org/show_bug.cgi?id=388660

Dr. Chapatin  changed:

   What|Removed |Added

 CC||bugsefor...@gmx.com

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[dolphin] [Bug 388660] Feature Request: Increase max icon thumbnail size

[Christoph Feck]

https://bugs.kde.org/show_bug.cgi?id=388660

Christoph Feck  changed:

   What|Removed |Added

   See Also||https://bugs.kde.org/show_b
   ||ug.cgi?id=368954

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[dolphin] [Bug 388660] Feature Request: Increase max icon thumbnail size

[Henrik Fehlauer]

https://bugs.kde.org/show_bug.cgi?id=388660

Henrik Fehlauer  changed:

   What|Removed |Added

 Status|NEEDSINFO   |CONFIRMED
 Ever confirmed|0   |1
 Resolution|WAITINGFORINFO  |---

--- Comment #10 from Henrik Fehlauer  ---
I guess Nate wanted Toby to file a new bug and therefore set it to NEEDSINFO,
but as that's not done I think we can just keep this bug open. Nevertheless,
thanks for the reminder ;)

Not much progress on the issues itself, so far.

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[dolphin] [Bug 388660] Feature Request: Increase max icon thumbnail size

[Christoph Feck]

https://bugs.kde.org/show_bug.cgi?id=388660

--- Comment #9 from Christoph Feck  ---
What is the status of this ticket? Could someone clarify which information is
needed, if any?

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[dolphin] [Bug 388660] Feature Request: Increase max icon thumbnail size

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=388660

--- Comment #8 from Nate Graham  ---
At this point, it might be useful to close the original bug and file new,
focused ones for the remaining issues. Could you do that, Toby?

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[dolphin] [Bug 388660] Feature Request: Increase max icon thumbnail size

[Toby Fox]

https://bugs.kde.org/show_bug.cgi?id=388660

--- Comment #7 from Toby Fox  ---
Created attachment 109998
  --> https://bugs.kde.org/attachment.cgi?id=109998=edit
Dolphin thumbnails correctly scaled 2x on 3840x2160 display

(In reply to Nate Graham from comment #6)
> IMHO a change to the FDO spec would indeed be worthwhile. 256px isn't really
> that big anymore on today's displays.
> 
> Toby, can you re-log-in/reboot and see if that fixes things for you?

Ok, this is interesting! In my previous screenshot, I pulled up the display
settings but didn't change them: I had it set at 2x scale for many months.
However, I tried changing scaling to 3x, rebooted, changed scaling back to 2x
and rebooted again, and now my thumbnails are showing larger as intended -
512px at max.

Looks like previously the plasma UI and most applications were correctly scaled
for me at 2x, but some applications (dolphin, konsole, maybe others) were stuck
at 1x and needed settings to be changed and rebooted to get it to work. Maybe
there was some HiDPI-related Dolphin or KDE update a while back that didn't
apply properly without this.

Anyway, screenshot attached of the it "correctly" scaled at 2x.

Now of course the issue is we have a 256px thumbnail upscaled to 512px, so it
looks blurry, and the other issues mentioned by Henrik. Situation is a little
better, but I definitely think it's worth pursuing further.

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[dolphin] [Bug 388660] Feature Request: Increase max icon thumbnail size

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=388660

Nate Graham  changed:

   What|Removed |Added

 CC||pointedst...@zoho.com
 Resolution|--- |WAITINGFORINFO
 Status|UNCONFIRMED |NEEDSINFO

--- Comment #6 from Nate Graham  ---
IMHO a change to the FDO spec would indeed be worthwhile. 256px isn't really
that big anymore on today's displays.

Toby, can you re-log-in/reboot and see if that fixes things for you?

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[dolphin] [Bug 388660] Feature Request: Increase max icon thumbnail size

[Henrik Fehlauer]

https://bugs.kde.org/show_bug.cgi?id=388660

Henrik Fehlauer  changed:

   What|Removed |Added

 CC||rk...@lab12.net

--- Comment #5 from Henrik Fehlauer  ---
I cannot reproduce. Setting scaling to 2x, after a relogin I get much larger
thumbnails than in your screenshot when setting the thumbnail slider to the
maximum value. In fact, for a setting of 256px they are 700 to 750px wide
(depending on the image), which seems strange.

However, I suspect you simply forgot to relogin, because your screenshot shows
a large font size with small icons everywhere in Dolphin, which is a typical
symptom in this case. Could you try to relogin and report back?

That said, there are still issues with Dolphin's thumbnails in HiDPI mode:
- shadow and selection button overlay on previews pixelated
- folders with thumbnail preview pixelated
- thumbnail pixmaps itself not pixelated, but not looking good because of
capped maximum thumbnail size
- mismatch between reported size in size slider tooltip and actual size on
screen

(And even when not in HiDPI mode, someone might want to have a larger thumbnail
size.)

@broulik: Would it be worth pursuing a change of the FDO spec? If so, how to
best approach that?

See also:
https://phabricator.kde.org/D9078
https://phabricator.kde.org/D6083

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[dolphin] [Bug 388660] Feature Request: Increase max icon thumbnail size

[Maik Qualmann]

https://bugs.kde.org/show_bug.cgi?id=388660

Maik Qualmann  changed:

   What|Removed |Added

 CC||metzping...@gmail.com

--- Comment #4 from Maik Qualmann  ---
In digiKam you can activate in the settings the support of thumbnails with
512x512 pixels. Default is 256x256 pixels maximum.

Maik

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[dolphin] [Bug 388660] Feature Request: Increase max icon thumbnail size

[Toby Fox]

https://bugs.kde.org/show_bug.cgi?id=388660

--- Comment #3 from Toby Fox  ---
Created attachment 109740
  --> https://bugs.kde.org/attachment.cgi?id=109740=edit
Screenshot showing 2x scaled display settings and 256px dolphin thumbnails

(In reply to Kai Uwe Broulik from comment #2)
> Do you have screen scaling enabled? If you set it to 2x scaling, the "256px"
> should actually become 512. (The thumbnails themselves don't support that,
> though, so they'd be larger but blurry. Fixing that would require serious
> re-engineering in the thumbnailer)

Interesting - my screen scaling is set to 2x, and thumbnail size maxed out, but
it does seem like they're still 256px. See attached screenshot - there are 5
rows, and even without padding or dolphin UI, that would be 5*512px = 2560px,
greater than my vertical resolution of 2160px. And the dolphin UI (and all UI
elements in my desktop environment) are appropriately scaled - if scaled larger
they'd be too big.

I understand, however, especially from Rog131's helpful reply, how deep this
functionality runs and how dependent it is on other standards and packages, so
I see it would be a laborious change.

But I do think that as resolutions get ever bigger and devices more
multi-purpose and media-heavy, such a change to the whole ecosystem is
(hopefully) due eventually. But I imagine this is isn't in the hands of the
Dolphin team or even KDE.

It's a bummer though. I've tried Gwenview, DigiKam, and several other pieces of
software, and so far nothing has this relatively basic (from a user's
perspective) functionality :(

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[dolphin] [Bug 388660] Feature Request: Increase max icon thumbnail size

[Kai Uwe Broulik]

https://bugs.kde.org/show_bug.cgi?id=388660

Kai Uwe Broulik  changed:

   What|Removed |Added

 CC||k...@privat.broulik.de

--- Comment #2 from Kai Uwe Broulik  ---
Do you have screen scaling enabled? If you set it to 2x scaling, the "256px"
should actually become 512. (The thumbnails themselves don't support that,
though, so they'd be larger but blurry. Fixing that would require serious
re-engineering in the thumbnailer)

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[dolphin] [Bug 388660] Feature Request: Increase max icon thumbnail size

[Rog131]

https://bugs.kde.org/show_bug.cgi?id=388660

Rog131  changed:

   What|Removed |Added

 CC||samrog...@hotmail.com

--- Comment #1 from Rog131  ---
(In reply to Toby Fox from comment #0)
> Currently the max thumbnail size is 256px. My screen's resolution is
> 3840x2160, so the largest I can get is approx 5 rows x 8 columns. For a
> folder of images, sometimes I want to preview multiple images at once at a
> larger size without switching to another application.
> 
> I'd suggest 512px or even 1024px. I think this would have minimal impact on
> users who don't care about this feature (the only thing I can think of is
> that it would increase the granularity of the icon size slider in the status
> bar) but would be quite helpful for others.
> 
> I'm not sure if this is related to any HiDPI issues, but the interface is
> otherwise scaled normally for me. Regardless, even if some upcoming HiDPI
> changes increased the preview size, I imagine plenty of users would want
> still larger sizes.

Same kind of from the KDE Forums: Dolphin feature request; Flexible thumbnail
size - https://forum.kde.org/viewtopic.php?f=223=122874

Short:

The KDE/Dolphin is following the
https://specifications.freedesktop.org/thumbnail-spec/thumbnail-spec-latest.html

-> 5.3. Thumbnail Size:
https://specifications.freedesktop.org/thumbnail-spec/thumbnail-spec-latest.html#THUMBSIZE

The other sizes are scaled from the 128x128 or 256x256.

The thumbnails are made by the kio:
https://api.kde.org/frameworks/kio/html/classThumbCreator.html

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[dolphin] [Bug 388660] Feature Request: Increase max icon thumbnail size

[Toby Fox]

https://bugs.kde.org/show_bug.cgi?id=388660

Toby Fox  changed:

   What|Removed |Added

 CC||toby...@gmail.com

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