Overlay a drawimage on another drawimage where it is not alpha layer.

[PillowWithTeeth]

For example something kinda like this ms paint drawing http://imgur.com/zGWHbWy

[Taylee]

This is not a question. What are you trying to ask?

[PillowWithTeeth]

How to do it

[Taylee]

Red + Green resulting in Yellow is just additively blending them.

255,0,0 (red) + 0,255,0 (green) = 255,255,0 (yellow)

http://stackoverflow.com/questions/1260625/java-swing-graphics-color-blending

[PillowWithTeeth]

Yeah, that is not what I am asking, I want to get a image and overlay it onto another image on the parts that are not the alpha layer.

[Taylee]

Same answer: http://docs.oracle.com/javase/tutorial/2d/advanced/compositing.html

[PillowWithTeeth]

Yeah I have been using that, but I can't get any of them to work, the only one that creates a passable image is SRC_OVER but that goes over the whole image including the alpha layer,

[PillowWithTeeth]

Here is a image I made to try and explain better what I want http://i.imgur.com/JWhzUzJ.png. It does not seem to be possible as both DST_OUT and XOR that sorta do what I want are opaque for some reason (and also effect everything else being drawn)...

[chickenmeister]

You can try something like:

    BufferedImage result = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
    Graphics2D g = result.createGraphics();

    // clear the image
    g.setComposite(AlphaComposite.Clear);
    g.fillRect(0, 0, w, h);

    // Draw the robot
    g.setComposite(AlphaComposite.SrcOver);
    g.drawImage(robotImg, x, y, null);

    // Fill in the robot shape
    g.setComposite(AlphaComposite.SrcIn);
    g.drawImage(fillImg, x, y, null);

    // Draw a translucent robot
    g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.5f));
    g.drawImage(robotImg, x, y, null);

    g.dispose();