Alpha Composite with BufferedImage : AlphaComposite « 2D Graphics « Java Tutorial

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Java Tutorial » 2D Graphics » AlphaComposite 
16. 46. 2. Alpha Composite with BufferedImage
Alpha Composite with BufferedImage
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Ellipse2D;
import java.awt.image.BufferedImage;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class AlphaCompositeCLEAR extends JFrame {
  public AlphaCompositeCLEAR() {
    getContentPane().add(new DrawingCanvas());
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setSize(300,300);
    setVisible(true);
  }

  public static void main(String arg[]) {
    new AlphaCompositeCLEAR();
  }
}

class DrawingCanvas extends JPanel{
  float alphaValue = 1.0f;
  int compositeRule = AlphaComposite.CLEAR;
  AlphaComposite ac;

  DrawingCanvas() {
    setSize(300300);
    setBackground(Color.white);
  }

  public void paint(Graphics g) {
    Graphics2D g2D = (Graphics2Dg;

    int w = getSize().width;
    int h = getSize().height;

    BufferedImage bi = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
    Graphics2D big = bi.createGraphics();

    ac = AlphaComposite.getInstance(compositeRule, alphaValue);

    big.setColor(Color.red);
    big.drawString("Destination", w / 4, h / 4);
    big.fill(new Ellipse2D.Double(0, h / 3* w / 3, h / 3));

    big.setColor(Color.blue);
    big.drawString("Source"* w / 4, h / 4);

    big.setComposite(ac);
    big.fill(new Ellipse2D.Double(w / 3, h / 3* w / 3, h / 3));

    g2D.drawImage(bi, null, 00);
  }
}
16. 46. AlphaComposite
16. 46. 1. Composite Demo
16. 46. 2. Alpha Composite with BufferedImageAlpha Composite with BufferedImage
16. 46. 3. AlphaComposite.SRCAlphaComposite.SRC
16. 46. 4. AlphaComposite.SRC_OVERAlphaComposite.SRC_OVER
16. 46. 5. AlphaComposite.DST_OVERAlphaComposite.DST_OVER
16. 46. 6. AlphaComposite.SRC_INAlphaComposite.SRC_IN
16. 46. 7. AlphaComposite.DST_INAlphaComposite.DST_IN
16. 46. 8. AlphaComposite.SRC_OUTAlphaComposite.SRC_OUT
16. 46. 9. AlphaComposite.DST_OUTAlphaComposite.DST_OUT
16. 46. 10. Draw ten rectangles with different levels of transparency
16. 46. 11. Compositing is the combining of elements from separate sources into single images
16. 46. 12. Composition technique in this animation.
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