4 Jul
2025
4 Jul
'25
10:17 a.m.
Hello all,
I'm finally experimenting with LV2 GUIs, in particular X11 ones.
Q1: How do I make the GUI window fixed size ? Tried adding
'ui:fixedSize' as a required feature, but that doesn't work.
Q2: In Ardour preferences I have
'Closing a plugin window only hides the window'.
Yet actually the GUI is destroyed. Bug or feature ?
TIA,
--
FA
4 Jul
4 Jul
10:53 a.m.
Am 04.07.25 um 12:17 schrieb Fons Adriaensen:
Hello all,
I'm finally experimenting with LV2 GUIs, in particular X11 ones.
Q1: How do I make the GUI window fixed size ? Tried adding
'ui:fixedSize' as a required feature, but that doesn't work.
For X11 windows you set the XSetWMNormalHints to your needs.
https://github.com/lv2/suil/blob/main/src/x11_in_gtk2.c#L187
Q2: In Ardour preferences I have
'Closing a plugin window only hides the window'.
Yet actually the GUI is destroyed. Bug or feature ?
TIA,
1:59 p.m.
On 2025-07-04 12:17, Fons Adriaensen wrote:
Hello all,
Hi Fons,
I'm finally experimenting with LV2 GUIs, in
particular X11 ones.
That's great to hear. For the case at hand
http://lists.lv2plug.in/listinfo.cgi/devel-lv2plug.in
may be a better place to ask for help
Q1: How do I make the GUI window fixed size ? Tried
adding
'ui:fixedSize' as a required feature, but that doesn't work.
in your case, use XSizeHints and XSetWMNormalHints().
Then again since DPI varies significantly you may want to make the GUI
scalable to cater for users with a HiDPI display.
for inspiration:
https://github.com/x42/robtk/blob/master/pugl/pugl_x11.c#L619-L644
Q2: In Ardour preferences I have
'Closing a plugin window only hides the window'.
Yet actually the GUI is destroyed. Bug or feature ?
It only applies to VST2/3 plugins (not LV2).
--
robin
2:17 p.m.
Hi all,
On 04/07/2025 15:59, Robin Gareus wrote:
Sorry to intrude the developer discussions, but...
as a (visually-challenged) user I highly agree and appreciate this.
HiDPI, DPI and scaling is pretty much hell with different gui toolkits,
setttings, and now also now wayland vs X11, etc. etc. (see e.g. all of
the cases and variations reported here [1]) any application / plugin
offering scaling (especially in the audio domain with potentially knobs,
faders, labels), IMHO offers a much better UX :-)
Lorenzo
[1] https://wiki.archlinux.org/title/HiDPI
On 2025-07-04 12:17, Fons Adriaensen wrote:
[...]
Hello all,
Hi Fons,
I'm finally experimenting with LV2 GUIs, in
particular X11 ones.
Q1: How do I
make the GUI window fixed size ? Tried adding
'ui:fixedSize' as a required feature, but that doesn't work.
in your case, use XSizeHints and XSetWMNormalHints().
Then again since DPI varies significantly you may want to make the GUI
scalable to cater for users with a HiDPI display.
11:38 p.m.
On Fri, Jul 04, 2025 at 03:59:44PM +0200, Robin Gareus wrote:
:-(
Another thing I noticed when loading some LV2 plugins (ACE)
in Ardour8: using the 'Add Preset' button seems to result
in a total freeze of Ardour.
Ciao,
--
FA
in your case, use XSizeHints and XSetWMNormalHints().
Will test.
But then what is the noUSerResize feature for ?
Some things are really odd. From your example code:
*widget = (void*)self->window;
This allows the host to find out the window created by
the plugin and resize its parent window to the actual
required size. But it does so only once, after calling
the constructor. Any later changes are completely ignored.
Then again since DPI varies significantly you may want
to make the GUI
scalable to cater for users with a HiDPI display.
I may offer two scales, based on the DPI.
for inspiration:
https://github.com/x42/robtk/blob/master/pugl/pugl_x11.c#L619-L644
That uses GLX. One step at a time - it's already hard enough.
Q2: In Ardour
preferences I have
'Closing a plugin window only hides the window'.
Yet actually the GUI is destroyed. Bug or feature ?
It only applies to VST2/3 plugins (not LV2).
5 Jul
5 Jul
11:08 a.m.
On 2025-07-05 01:38, Fons Adriaensen wrote:
:) despite GLX, all the window sizing and event handling are just X11.
On Fri, Jul 04, 2025 at 03:59:44PM +0200, Robin Gareus
wrote:
It's an optional extension (like LV2 UI) that not all hosts implement.
I suppose it's a bug that Ardour still loads the plugin when a required
feature is not implemented.
in your case, use XSizeHints and
XSetWMNormalHints().
Will test.
But then what is the noUSerResize feature for ?
Some things are really odd. From your example code:
*widget = (void*)self->window;
This allows the host to find out the window created by
the plugin and resize its parent window to the actual
required size.
That is backwards. The child window size should follow the parent.
If the child window is smaller than the the parent's, libsuil centers
the child window.
Then again
since DPI varies significantly you may want to make the GUI
scalable to cater for users with a HiDPI display.
I may offer two scales, based on the DPI.
for inspiration:
https://github.com/x42/robtk/blob/master/pugl/pugl_x11.c#L619-L644
That uses GLX. One step at a time - it's already hard enough.
Another thing I noticed when loading some LV2 plugins
(ACE)
in Ardour8: using the 'Add Preset' button seems to result
in a total freeze of Ardour.
Works just fine here. https://ardour.org/debugging_ardour
--
robin
8
days inactive
9
days old
linux-audio-dev@lists.linuxaudio.org
5 comments
4 participants
participants (4)
-
Fons Adriaensen -
Hermann Meyer -
Lorenzo Sutton -
Robin Gareus