Capturing bitmaps behind the composable.

[4gus71n]

Hey there,

Thanks for putting together such an amazing library! I want to bring up an issue I have been going through. I'm in a situation where I have a screen that looks like this:

@Composable
fun SomeScreen() {
    Box {
        Box {
            // I have a camera surface here, but you could paint this box red and it would be the same
        }
        Box() {
            // I use this other box as an overlay for the first one
            Column {  
                SomeToolbar()
                Row { 
                    Spacer(Modifier.width(24.dp))
                    Box(Modifier.weight(1f)) { /* Keyhole!!!*/ }
                    Spacer(Modifier.width(24.dp))
                }
                // More stuff
            }
        }
    }
}

If I use your library to capture what the keyhole Box has I'd get a blank bitmap. It is not just your library, I have tried any other technique to capture bitmaps on compose and none of them is working, apparently because the composable I want to capture is behind the keyhole box, and not within.

Makes sense? I can provide some more examples if it helps. Have you run into this situation ever? Any tips?

I did workaround the problem with a very nasty hack – I basically took a capture of the camera surface bitmap and then cut the keyhole part using the bounds of the Box.

[PatilShreyas]

@4gus71n can you provide actual usage example? Maybe we can check if this is fixable or not