Hello, is there a way to change two states atomically? For example, to draw an object, I need to change the scale and translation. I don't want the object to be redrawn before I've changed these two states.

What makes you think you need to do this? Compose will wait until the next frame before recomposing/redrawing.

while you may not need it in this case, the way to have multiple state updates happen atomically is to use

Snapshot.withMutableSnapshot

^ this is only needed if you are operating from somewhere else than the UI thread

Thank you for your very helpful answers. I wrongly assumed that this was the reason for my display bug. At least I've eliminated that possibility and learned something. Have a nice day!

Good news! If you need to use

Snapshot.withMutableSnapshot

in the future, be aware of this:

[block] must not suspend if [withMutableSnapshot] is called from a suspend function.

As of Compose 1.5.1,

withMutableSnapshot

is still tagged with:

// TODO: determine a good way to prevent/discourage suspending in an inlined [block]