A painter that wraps another painter to overwrite its color filter and/or alpha.

forwarding_painter.kt

open class ForwardingPainter(
    private val delegate: Painter,
    private var alpha: Float = DefaultAlpha,
    private var colorFilter: ColorFilter? = null,
) : Painter() {

    override val intrinsicSize get() = delegate.intrinsicSize

    override fun applyAlpha(alpha: Float): Boolean {
        if (alpha == DefaultAlpha) {
            this.alpha = alpha
        }
        return true
    }

    override fun applyColorFilter(colorFilter: ColorFilter?): Boolean {
        if (colorFilter == null) {
            this.colorFilter = colorFilter
        }
        return true
    }

    override fun DrawScope.onDraw() {
        with(delegate) {
            draw(size, alpha, colorFilter)
        }
    }
}