I am trying to draw Squircle Image using the Android Jetpack Compose.
I found simple code set on Github: https://github.com/Size0f/android.compose.squircle/blob/master/squircle/src/main/java/com/sizeof/libraries/compose/squircle/SquircleShape.kt
Here is SquuircleShape compose:
class SquircleShape : Shape {
override fun createOutline(
size: Size,
layoutDirection: LayoutDirection,
density: Density
) = Outline.Generic(
path = createSquirclePath(size, SMOOTHING)
)
private fun createSquirclePath(size: Size, smoothing: Double): androidx.compose.ui.graphics.Path {
return Path().apply {
val oversize = size.width * OVERSAMPLING_MULTIPLIER
val squircleRadius = (oversize / 2F).toInt()
// power radius before for optimization
val poweredRadius = squircleRadius
.toDouble()
.pow(smoothing)
// generate Y coordinates for path
val yCoordinates = (-squircleRadius..squircleRadius).map { x ->
x.toFloat() to evalSquircleFun(x, poweredRadius, smoothing)
}
// generate Y coordinates for mirror half of squircle shape
val yMirroredCoordinates = yCoordinates.map { (x, y) -> Pair(x, -y) }
var currentX = 0F
var currentY = 0F
// set path by using quadraticBezier
(yCoordinates + yMirroredCoordinates).forEach { (x, y) ->
quadTo(currentX, currentY, x, y)
currentX = x
currentY = y
}
close()
// scale down to original size - for better corners without anti-alias
transform(
scaleMatrix(
sx = 1 / OVERSAMPLING_MULTIPLIER,
sy = 1 / OVERSAMPLING_MULTIPLIER
)
)
// translate path to center
transform(
translationMatrix(
tx = size.width / 2,
ty = size.height / 2
)
)
}.asComposePath()
}
// squircle formula: | (r^smoothing) - |x|^5 | ^ (1 / smoothing)
private fun evalSquircleFun(x: Int, poweredRadius: Double, smoothing: Double) =
(poweredRadius - abs(x.toDouble().pow(smoothing))).pow(1 / smoothing).toFloat()
companion object {
private const val SMOOTHING = 3.0
private const val OVERSAMPLING_MULTIPLIER = 4F
}
}
Here is SquircleImage compose:
@Composable
fun SquircleImage(
modifier: Modifier = Modifier,
imageRequest: ImageRequest,
size: Dp,
backgroundColor: Color = Gray10,
borderColor: Color = Gray20,
borderSize: Dp = 0.5.dp,
radius: Dp = 24.dp
) {
Box(
modifier = modifier
.size(size)
.clip(SquircleShape())
.background(borderColor),
contentAlignment = Alignment.Center
) {
Image(
painter = rememberAsyncImagePainter(
model = imageRequest,
contentScale = ContentScale.Crop
),
contentDescription = null,
contentScale = ContentScale.Crop,
modifier = Modifier
.clip(SquircleShape())
.background(backgroundColor)
.size(size - borderSize - borderSize),
)
}
}
In general, it works fine like:
But if I navigate other pages again and again repeatedly, the Squircle images are gone!:
There is no exception or meaningful logs.
It doesn't happen always. Occurrence frequency maybe 1/10? And It occurs on Android 10.
Somebody help me, please?