Document vsync/presentation-interval

vvvv / VL.StandardLibs

A collection of standard libraries for vvvv including VL.Stride, VL.Skia, VL.ImGui, msgpack.org[VL]

https://visualprogramming.net

GNU Lesser General Public License v3.0

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Document vsync/presentation-interval #76

Open joreg opened 1 year ago

joreg commented 1 year ago

https://learn.microsoft.com/en-us/windows/win32/direct3d9/d3dpresent

in overview patch
in pin tooltip

gregsn commented 1 year ago

new suggestion:

show VSync pin on TextureWindow, RenderWindow, SceneWindow
Enable VSync on RenderWindow, SceneWindow
show runtime warning if VSync is on on more than one running window
make sure help patches have VSync turned off

tgd-git commented 1 year ago

maybe just show the warning next to perfmeter. thats where you look for stutters

gregsn commented 1 year ago

yet another suggestion:

have an own enum, which somehow acknowledges that sometimes we have several windows that need to cooperate
- No VSync
- Wait For One Frame
- Two
- Three
- Cooperative
Cooperative is our default

Cooperative means:

If all windows are cooperative, one of them gets picked to do the VSync automatically (-> no tearing).
If one window is on explicit wait (one, two, ..) this one gets picked as the one that waits. The other ones are not explicitly set to vsync by the user. Thus we can do whatever feels right. E.g. don't sync

joreg commented 1 year ago

or could it be just a global setting VSYNC on/off on the MainLoop node and the system makes sure max one renderer (even between skia and stride) has vsync set. and we could even get rid of the vsync inputs on renderers?

bj-rn commented 1 year ago

or could it be just a global setting VSYNC on/off on the MainLoop node and the system makes sure max one renderer (even between skia and stride) has vsync set. and we could even get rid of the vsync inputs on renderers?

There might be situations where you want to sync to a specific screen. How would that work?

joreg commented 1 year ago

@bj-rn please detail that situation

bj-rn commented 1 year ago

For example the main output is some LED-screen and another output is a connected to a preview monitor. The timings of those two most likely differ and in that case one certainly wants to sync to the main output.