ComposeScene

has the

hasInvalidations

function, which I currently check periodically. Is there a way to setup a callback which will be executed if this value changes to true?

ComposeScene

has

invalidate

callback in its constructor, which will be called, when ComposeScene should be rerendered

And how can I make sure that calling

scene.render(canvas, System.nanoTime())

inside that

invalidate

callback does not lead to concurrency issues?

You shouldn't call

render

in it. You should schedule a new frame inside your rendering loop,

render

should be called inside it. See the example

I assume that in this example

GlfwCoroutineDispatcher()

(and using that for the

FrameDispatcher

) is the important part, because it is only single threaded, am I right?

Yes, it is important that it is single threaded. It is mostly for `LaunchedEffect`'s, which can't perform in parallel with ComposeScene methods. Sorry, it is not true, `LaunchedEffect`'s theoretically can launch in parallel. It also used for other things, like recompositions, and scheduling callbacks.