Previously, this code worked:

@Composable
fun sample() {
    val radius = 50f
    Surface(Modifier.size(200.dp)) {
        Canvas(modifier = Modifier.fillMaxSize()) {
            drawCircle(Color.DarkGray, radius * 2, style = Stroke(75f))
            drawArc(
                color = Color.Red,
                startAngle = 0f,
                sweepAngle = 125f,
                useCenter = false,
                topLeft = Offset(size.width / 4, size.height / 4),
                size = Size(
                    radius * 2,
                    radius * 2
                ),
                style = Stroke(75.0f)
            )
        }
    }
}

It drew a gray background circle, with a red arc on it. It's just a sample to reproduce the problem. My REAL code is for course beautiful and elegant and so forth. Now, in

0.4

, it draws the same, but the arc is half the size it used to be. I need to multiply the radius by 4 instead of 2 to get the result.

Expected vs Reality

It is very likely I just don't know what I'm doing, so if that's the case, tell me gently 🤣

This is running on MacOS with Metal, I believe, which leads me to think it could be related to the new rendering, but I will need to check up on that before I log it as a bug.

The code that works:

If you need circle that is the half of the Surface:

@Composable
fun sample() {
//    val radius = 50 * LocalDensity.current.density
    Surface(Modifier.size(200.dp)) {
        Canvas(modifier = Modifier.fillMaxSize()) {
            val radius = size.width / 4f
            drawCircle(Color.DarkGray, radius = radius, style = Stroke(75f))
            drawArc(
                color = Color.Red,
                startAngle = 0f,
                sweepAngle = 125f,
                useCenter = false,
                topLeft = this.center - Offset(radius, radius),
                size = Size(radius * 2, radius * 2),
                style = Stroke(75.0f)
            )
        }
    }
}

I am doing a lot of mouse position tracking, so it might even be that. But I'll come up with an example and then post that for help. Thank you!