A question about XPresent extension from the user point of view

[Carsten Haitzler]

On Sat, 19 Oct 2024 10:40:09 +0300 Ярослав Машко <yaroslaw.mashko at gmail.com>
said:

> Hello,
> 
> I get a feeling that XPresent extension is supposed to be used in window
> managers specifically. I'm just a simple user. Can I use the extension, for
> better control of interactive, or semi-interactive graphics, from an
> application?
> 
> To elaborate. I see a good use for frame notification for an user-level
> application. Now my window manager is xfwm4. It can use the extension and
> also seem to redirect all application-level windows.
> What is the strategy to use the extension in the presence of a window
> manager? I mean, in general, the WM can redirect, composite, or do
> something else, or do some subset of the list.
> 
> So, in general, what should I know to use the extension at user-level? Is
> it intended for users at all? In most simple way, would call to
> XPresentPixmap from a user-level application, pass it to the X11/WM? And
> most importantly, will it return a correspondent to the call notification
> back to my application?

you can use xpresent just as a vsync timer event. time your animation to vsync
events - dont go faster or slower than the screen can handle and use those
events to trigger animation frame redraws.

-- 
------------- Codito, ergo sum - "I code, therefore I am" --------------
Carsten Haitzler - raster at rasterman.com