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Make Blender to automatically recognize Linux desktop DPI
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Description

Please make Blender capable of automatically recognize the Linux desktop PPI, and set it to its interface accordingly.

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Alberto Salvia Novella (es20490446e) created this task.Apr 27 2016, 4:26 PM
Alberto Salvia Novella (es20490446e) raised the priority of this task from to 90.
Alberto Salvia Novella (es20490446e) updated the task description. (Show Details)
Alberto Salvia Novella (es20490446e) added a project: BF Blender: Next.
Alberto Salvia Novella (es20490446e) edited a custom field.
Alberto Salvia Novella (es20490446e) added a subscriber: Alberto Salvia Novella (es20490446e).

Also reported to (https://bugs.launchpad.net/ubuntu/+source/blender/+bug/1575703).

Aaron Carlisle (Blendify) edited projects, added BF Blender; removed BF Blender: Next.Apr 27 2016, 11:14 PM
Aaron Carlisle (Blendify) edited a custom field.
Campbell Barton (campbellbarton) added a subscriber: Campbell Barton (campbellbarton).EditedApr 28 2016, 4:03 AM

Even though X11 has a DPI setting for the viewport, it seems each desktop environment/widget set uses its own scaling. see: http://www.makeuseof.com/tag/linux-hidpi-support-for-gnome-kde-xfce-cinnamon-and-firefox/

We could...

  • Read the DPI settings from X11 and guess, while this should work, it seems nobody is using this setting to scale the UI, so likely its not a reliable value.
  • Read the interface scale setting from gnome/kde... etc (not very portable).

However it would be good if there was some more straightforward way to get this information from X11/xlib.

Campbell Barton (campbellbarton) lowered the priority of this task from 90 to Normal.Apr 28 2016, 4:05 AM
Campbell Barton (campbellbarton) edited a custom field.
Alberto Salvia Novella (es20490446e) added a comment.Apr 28 2016, 2:08 PM

Seems than your point is right, and the only way to configure that right now is per desktop environment.

Where do you think I should ask for this feature to be implemented?

Campbell Barton (campbellbarton) changed the task status from Unknown Status to Unknown Status.Apr 28 2016, 5:01 PM
Campbell Barton (campbellbarton) claimed this task.

Ideally this is something https://www.freedesktop.org would have a specification for. (maybe worth asking on their mailing list... )

Alberto Salvia Novella (es20490446e) added a comment.May 4 2016, 5:44 PM

I have just started a conversation about it on the Freedesktop mailing list. As soon as we get some conclusion, I will post it here.

Thank you.

Alberto Salvia Novella (es20490446e) added a comment.May 5 2016, 3:31 PM

In the Wayland display manager this can be achieved by using (https://wayland.freedesktop.org/docs/html/apa.html#protocol-spec-wl_output).

I'm going to ask for xserver and mir.

Alberto Salvia Novella (es20490446e) added a comment.May 5 2016, 3:38 PM

In the Mir display manager this can be achieved by using (https://unity.ubuntu.com/mir/struct_mir_display_output.html).

Alberto Salvia Novella (es20490446e) added a comment.May 5 2016, 3:40 PM

@ Campbell Barton

Since the feature can be implemented in at least two of the three existing display servers, please consider reopening this bug report again. Thanks

Alberto Salvia Novella (es20490446e) added a comment.May 7 2016, 4:40 PM

xserver also has a way to do so: (https://lists.x.org/archives/xorg/2016-May/058039.html)

Brecht Van Lommel (brecht) added a subscriber: Brecht Van Lommel (brecht).EditedMay 7 2016, 5:18 PM

The most generic solution might be Xft/DPI from XSETTINGS:
https://www.freedesktop.org/wiki/Specifications/XSettingsRegistry/

This is mostly a GNOME / GTK thing, but from what I can tell this is what Chrome and Firefox use (though GTK) on all desktop environments. It should also work with KDE through xsettings-kde and Xfce through xfsettingsd.

Philipp Oeser (lichtwerk) mentioned this in T55370: Linux todo list.Jun 14 2018, 2:58 PM