val mask = run {
        val gradient = BitmapFactory.decodeResource(resources, R.drawable.comic_top)
        val resourceAR = resource.width / resource.height.toFloat()
        val scaledHeight = Math.round((resource.width / resourceAR) / 4)
        val maskF = Bitmap.createScaledBitmap(gradient, resource.width, scaledHeight, false)
        val mask = maskF
            .copy(Bitmap.Config.ARGB_8888, true)
            .apply {
                setHasAlpha(true)
            }
        
        gradient.recycle()
        maskF.recycle()
        
        mask
    }