Hi there

Say I have a Z shaped white mask and I want to crop an image to this shape. How do I do this in java?

Both images are 2560x1440, but the Z shaped mask has transparent bits.

My attempt in scala but using Java's awt library:

val imageBuff = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB)
val imageB = imageBuff.createGraphics()
imageB.drawImage(image, 0, 0, null)

val maskBuffered = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB)
val maskB = mask01Buffered.createGraphics()
maskB.drawImage(scaledmask, 0, 0, null)


def applyMask(imageBuffered: BufferedImage, maskBuffered: BufferedImage): BufferedImage = {
  val imagePixels = heroBuffered.getRGB(0, 0, width, height, null, 0, width)
  val maskPixels = maskBuffered.getRGB(0, 0, width, height, null, 0, width)

 for (i <- 0 to maskPixels.length - 1)
  {
    val color = imagePixels(i)
    val mask = maskPixels(i) 
    imagePixels(i) = mask | color
  }

  imageBuffered.setRGB(0, 0, width, height, imagePixels, 0, width)
  imageBuffered
}

val maskApplied = applyMask(imageBuff, maskBuffered)

val scaledForeground: Image = maskApplied.getScaledInstance((width * 1.08).toInt, (height * 1.08).toInt, Image.SCALE_DEFAULT)

val finalImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB)
val f = finalImage.createGraphics
val newX: Int = (0 - width * 0.08).toInt
val newY: Int = (0 - height * 0.08).toInt
f.drawImage(scaledForeground, newX, newY, null)

This creates an image where I get the original image showing through the transparent bits of the mask and then the white of the mask overs the rest of the image, but what I really want is the other way around. I have tried having imagePixels(i) = color | mask instead but I get the same result.

Does anyone have any other ideas?

Many thanks, J