[Question] [Off-Topic] [Windows] How did you ensured that flutter doesn't uses d3d textures while you write to them?

[nrbnlulu]

Hey, I am trying to learn to use d3d textures on windows and I was hoping you could give a hint.
basically I have managed to pipe GStreamer textures into flutter but flutter crashes every now and then and I assume its due to
flutter and GStreamer race conditions.
I have seens that it is possible to mitigate that with keyed_mutex but I think you have to acquire the d3d_device from flutter in order for the mutex to work (I could be wrong tho)

Anyways if you have any hints about this I would be grateful 🙏

[wang-bin]

you can't get any d3d object from flutter, so the only choice is coping your content to the texture when flutter acquiring it.

[nrbnlulu]

like you did here

fvp/windows/fvp_plugin.cpp

Lines 63 to 64 in cbfb02d

	ctx->CopyResource(tex.Get(), rt.Get());
	ctx->Flush();

?
I think the docs said that Flush

incurs a performance penalty. Each call to Flush incurs a significant amount of overhead.

Can we avoid that? maybe contributing to flutter itself, to expose the device they use?

[wang-bin]

it's better to add flush here to let gpu copy ASAP.

maybe contributing to flutter itself, to expose the device they use?

it's the best option