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perf: reduce sensor rate and pause blob animation during chat

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Sensor: SENSOR_DELAY_GAME → SENSOR_DELAY_UI (~15Hz instead of ~60Hz),
parallax effect unchanged. Blob drift animation only runs on empty
state, frozen at midpoint during chat (blobs still visible, no GPU
animation cost).
This commit is contained in:
Bruno Deanoz 2026-06-22 19:01:25 +02:00
parent f703196087
commit 313c21d47d
3 changed files with 18 additions and 13 deletions
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13
app/src/main/java/dev/kaizen/app/chat/Background.kt
View file

@ -41,20 +41,25 @@ import dev.kaizen.app.ui.theme.rememberDitherBrush
/** Mesh/blob background: large, heavily blurred color circles that drift slowly. */ /** Mesh/blob background: large, heavily blurred color circles that drift slowly. */
@Composable @Composable
fun MeshBackground(content: @Composable BoxScope.() -> Unit) { fun MeshBackground(animateBlobs: Boolean = true, content: @Composable BoxScope.() -> Unit) {
val dark = isSystemInDarkTheme() val dark = isSystemInDarkTheme()
val accent = LocalKaizenAccent.current val accent = LocalKaizenAccent.current
val base = MaterialTheme.colorScheme.background val base = MaterialTheme.colorScheme.background
// Blobs are subtler in light mode.
val factor = if (dark) 1f else 0.65f val factor = if (dark) 1f else 0.65f
val drift = if (animateBlobs) {
val transition = rememberInfiniteTransition(label = "blobs") val transition = rememberInfiniteTransition(label = "blobs")
val drift by transition.animateFloat( val d by transition.animateFloat(
initialValue = 0f, initialValue = 0f,
targetValue = 1f, targetValue = 1f,
animationSpec = infiniteRepeatable(tween(22000, easing = LinearEasing), RepeatMode.Reverse), animationSpec = infiniteRepeatable(tween(22000, easing = LinearEasing), RepeatMode.Reverse),
label = "drift", label = "drift",
) )
// Dither overlay (drawn last, over everything) — kills 8-bit gradient banding. d
} else {
0.5f
}
val ditherBrush = rememberDitherBrush() val ditherBrush = rememberDitherBrush()
Box( Box(
Modifier Modifier

2
app/src/main/java/dev/kaizen/app/chat/ChatScreen.kt
View file

@ -603,7 +603,7 @@ fun ChatScreen(
}, },
gesturesEnabled = true // Allows swiping from the screen's left edge to open the drawer gesturesEnabled = true // Allows swiping from the screen's left edge to open the drawer
) { ) {
MeshBackground { MeshBackground(animateBlobs = messages.isEmpty()) {
Box(Modifier.fillMaxSize(), contentAlignment = Alignment.Center) { Box(Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
// 1. Scrollable Chat Content // 1. Scrollable Chat Content
// Stretches to the full screen, allowing bubbles to scroll cleanly behind the floating bottom dock. // Stretches to the full screen, allowing bubbles to scroll cleanly behind the floating bottom dock.

4
app/src/main/java/dev/kaizen/app/ui/sensor/TiltState.kt
View file

@ -115,7 +115,7 @@ fun rememberTiltState(): State<Offset> {
Lifecycle.Event.ON_START -> { Lifecycle.Event.ON_START -> {
if (!registered) { if (!registered) {
sensorManager.registerListener( sensorManager.registerListener(
listener, sensor, SensorManager.SENSOR_DELAY_GAME listener, sensor, SensorManager.SENSOR_DELAY_UI
) )
registered = true registered = true
} }
@ -131,7 +131,7 @@ fun rememberTiltState(): State<Offset> {
lifecycle.addObserver(lifecycleObserver) lifecycle.addObserver(lifecycleObserver)
if (lifecycle.currentState.isAtLeast(Lifecycle.State.STARTED)) { if (lifecycle.currentState.isAtLeast(Lifecycle.State.STARTED)) {
sensorManager.registerListener(listener, sensor, SensorManager.SENSOR_DELAY_GAME) sensorManager.registerListener(listener, sensor, SensorManager.SENSOR_DELAY_UI)
registered = true registered = true
} }