Implicit ImageUtil class for manipulating images

ImageUtil.scala

package util

import java.awt.image.BufferedImage
import java.awt.{Color, Image}

/**
  * Created with IntelliJ IDEA.
  * User: arthur
  * Date: 17/11/13
  * Time: 22:26
  * To change this template use File | Settings | File Templates.
  */
object ImageUtil {
   implicit class ImageImprovements(val i: BufferedImage) {

     def scaleToWidth (width:Int) = {
       val height = (i.getHeight.toDouble*(width.toDouble/i.getWidth.toDouble)).toInt
       val scaledImage = i.getScaledInstance(width, height, Image.SCALE_SMOOTH)
       val imageBuff = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB)
       val graphics = imageBuff.createGraphics
       graphics.drawImage(scaledImage,0,0,Color.black,null)
       graphics.dispose
       imageBuff
     }

     def getCentreCut (width:Int, height:Int) = {
       val x = centre(i.getWidth,width)
       val y = centre(i.getHeight,height)
       i.getSubimage(x,y,smallest(width,i.getWidth),smallest(height,i.getHeight))
     }

     def minimumDimensions(width:Int,height:Int) = {
       if (width > i.getWidth || height > i.getHeight) {
         val imageBuff = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB)
         val graphics = imageBuff.createGraphics
         graphics.drawImage(i, centre(width,i.getWidth),centre(height,i.getHeight),Color.black,null)
         graphics.dispose()
         imageBuff
       } else {
        i
       }
     }

     private[ImageImprovements] def centre (oldDim:Int, newDim:Int) = {
       if (oldDim > newDim) {
         (oldDim - newDim)/2
       }else {
        0
       }
     }

     private[ImageImprovements] def smallest (a:Int, b:Int) = {
       if (a < b) {
         a
       } else {
        b
       }
     }

   }
 }