paint

fun Modifier.paint(
    painter: Painter,
    sizeToIntrinsics: Boolean = true,
    alignment: Alignment = Alignment.Center,
    contentScale: ContentScale = ContentScale.Inside,
    alpha: Float = DefaultAlpha,
    colorFilter: ColorFilter? = null
): Modifier

import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.padding
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.paint
import androidx.compose.ui.geometry.Size
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.drawscope.DrawScope
import androidx.compose.ui.graphics.painter.Painter
import androidx.compose.ui.unit.dp

class CustomPainter : Painter() {

    override val intrinsicSize: Size
        get() = Size(300.0f, 300.0f)

    override fun DrawScope.onDraw() {
        drawCircle(center = center, radius = size.minDimension / 2.0f, color = Color.Red)
    }
}

Box(
    modifier =
        Modifier.background(color = Color.Gray)
            .padding(30.dp)
            .background(color = Color.Yellow)
            .paint(CustomPainter())
) {
    /** intentionally empty */
}