Blurred dialog not updating when source changes

[VadimZhuk0v]

Information

• Haze version: 1.3.1
• Platform: Android
• Platform version: Android 15
• Specific device: Samsung Galaxy S25 Ultra

Expected Behavior

I want to create a blurred dialog

Actual Behavior

The code below makes the dialog blurred, but blur is't dynamic.

Steps to Reproduce the Problem

val LocalHaze = staticCompositionLocalOf<HazeState?> { null }

@Composable
fun ComposeApp() {
    AppTheme {
        val navController = rememberNavController()
        val hazeState = remember { HazeState() }
        CompositionLocalProvider(
            LocalNavController provides navController,
            LocalHaze provides hazeState,
        ) {
            Box(
                modifier = Modifier.hazeSource(hazeState)
            ) {
                NavHost(
                    navController = navController,
                    startDestination = HomeScreenArgs,
                ) {
                    homeScreenComposable()
                }
            }
        }
    }
}

fun SampleDialog(
    visible: MutableState<Boolean>,
) {
    if (visible.value) {
        Dialog(
            onDismissRequest = { visible.value = false },
            content = {
                Box(
                    modifier = Modifier
                        .size(300.dp)
                        .clip(RoundedCornerShape(16.dp))
                        .hazeEffect(
                            state = LocalHaze.current!!,
                            style = HazeMaterials.thin(
                                containerColor = Color.Blue.copy(alpha = 0.2f)
                            ),
                        ),
                )
            },
        )
}

[chrisbanes]

There's not much we can do here. GraphicsLayer repainting is done at the system level, and it seems that Android aggressively stops layer updates for obscured layers. This does not happen on Skiko (i.e. this would work there), so it's seems like an optimisation somewhere in Android's drawing pipeline.

This might be because Dialog in Compose does not use window flags such as windowIsTranslucent, but there's no way for us to change that.