Java by API/java.awt/AlphaComposite

AlphaComposite.CLEAR

 
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.ruposite;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class MainClass extends JPanel {
  public void paint(Graphics g) {
    Graphics2D g2 = (Graphics2D) g;
    RenderingHints rh = g2.getRenderingHints();
    rh.put(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    g2.setRenderingHints(rh);
    int x = 40, y = 40;
    g.setColor(Color.red);
    g.fillOval(x, y, 50, 50);
    Composite old = g2.getComposite();
    g2.setComposite(AlphaComposite.getInstance(AlphaComposite.CLEAR));
    g.setColor(Color.green);
    g.fillOval(x + 30, y + 30, 30, 30);
    g2.setComposite(old);
    g.setColor(Color.black);
    g.drawString("AlphaComposite.CLEAR", x, y + 80);
  }
  public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.getContentPane().add(new MainClass());
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(200, 200);
    frame.setVisible(true);
  }
}

AlphaComposite.DST_ATOP

 

import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Main extends JPanel {
  public void paint(Graphics g) {
    Graphics2D g2d = (Graphics2D) g;
    AlphaComposite ac = AlphaComposite.getInstance(AlphaComposite.DST_ATOP, 0.5f);
    BufferedImage buffImg = new BufferedImage(60, 60, BufferedImage.TYPE_INT_ARGB);
    Graphics2D gbi = buffImg.createGraphics();
    gbi.setPaint(Color.red);
    gbi.fillRect(0, 0, 40, 40);
    gbi.setComposite(ac);
    gbi.setPaint(Color.green);
    gbi.fillRect(5, 5, 40, 40);
    g2d.drawImage(buffImg, 20, 20, null);
  }
  public static void main(String[] args) {
    JFrame frame = new JFrame("Composition");
    frame.add(new Main());
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(400, 120);
    frame.setVisible(true);
  }
}

AlphaComposite.DST_IN

 
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.ruposite;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class MainClass extends JPanel {
  public void paint(Graphics g) {
    Graphics2D g2 = (Graphics2D) g;
    RenderingHints rh = g2.getRenderingHints();
    rh.put(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    g2.setRenderingHints(rh);
    int x = 40, y = 40;
    g.setColor(Color.red);
    g.fillOval(x, y, 50, 50);
    Composite old = g2.getComposite();
    g2.setComposite(AlphaComposite.getInstance(AlphaComposite.DST_IN));
    g.setColor(Color.green);
    g.fillOval(x + 30, y + 30, 30, 30);
    g2.setComposite(old);
    g.setColor(Color.black);
    g.drawString("AlphaComposite.DST_IN", x, y + 80);
  }
  public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.getContentPane().add(new MainClass());
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(200, 200);
    frame.setVisible(true);
  }
}

AlphaComposite.DST_OUT

 
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.ruposite;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class MainClass extends JPanel {
  public void paint(Graphics g) {
    Graphics2D g2 = (Graphics2D) g;
    RenderingHints rh = g2.getRenderingHints();
    rh.put(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    g2.setRenderingHints(rh);
    int x = 40, y = 40;
    g.setColor(Color.red);
    g.fillOval(x, y, 50, 50);
    Composite old = g2.getComposite();
    g2.setComposite(AlphaComposite.getInstance(AlphaComposite.DST_OUT));
    g.setColor(Color.green);
    g.fillOval(x + 30, y + 30, 30, 30);
    g2.setComposite(old);
    g.setColor(Color.black);
    g.drawString("AlphaComposite.DST_OUT", x, y + 80);
  }
  public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.getContentPane().add(new MainClass());
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(200, 200);
    frame.setVisible(true);
  }
}

AlphaComposite.DST_OVER

 
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.ruposite;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class MainClass extends JPanel {
  public void paint(Graphics g) {
    Graphics2D g2 = (Graphics2D) g;
    RenderingHints rh = g2.getRenderingHints();
    rh.put(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    g2.setRenderingHints(rh);
    int x = 40, y = 40;
    g.setColor(Color.red);
    g.fillOval(x, y, 50, 50);
    Composite old = g2.getComposite();
    g2.setComposite(AlphaComposite.getInstance(AlphaComposite.DST_OVER));
    g.setColor(Color.green);
    g.fillOval(x + 30, y + 30, 30, 30);
    g2.setComposite(old);
    g.setColor(Color.black);
    g.drawString("AlphaComposite.DST_OVER", x, y + 80);
  }
  public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.getContentPane().add(new MainClass());
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(200, 200);
    frame.setVisible(true);
  }
}

AlphaComposite: getInstance(int rule, float alpha)

 
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.ruposite;
import java.awt.Container;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.geom.Rectangle2D;
import javax.swing.JComponent;
import javax.swing.JFrame;
public class MainClass {
  public static void main(String[] args) {
    JFrame jf = new JFrame("Demo");
    Container cp = jf.getContentPane();
    MyCanvas tl = new MyCanvas();
    cp.add(tl);
    jf.setSize(300, 200);
    jf.setVisible(true);
  }
}
class MyCanvas extends JComponent {
  public void paint(Graphics g) {
    Graphics2D g2 = (Graphics2D)g;
    
    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
        RenderingHints.VALUE_ANTIALIAS_ON);
    Rectangle2D r = new Rectangle2D.Double(50, 50, 150, 100);
    g2.setPaint(Color.red);
    g2.fill(r);
    Composite c = AlphaComposite.getInstance(AlphaComposite.SRC_OVER,
       .4f);
    g2.setComposite(c);

    g2.setPaint(Color.blue);
    g2.setFont(new Font("Times New Roman", Font.PLAIN, 72));
    g2.drawString("www.jexp.ru", 25, 130);
  }
}

AlphaComposite.SRC

 
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.ruposite;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class MainClass extends JPanel {
  public void paint(Graphics g) {
    Graphics2D g2 = (Graphics2D) g;
    RenderingHints rh = g2.getRenderingHints();
    rh.put(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    g2.setRenderingHints(rh);
    int x = 40, y = 40;
    g.setColor(Color.red);
    g.fillOval(x, y, 50, 50);
    Composite old = g2.getComposite();
    g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC));
    g.setColor(Color.green);
    g.fillOval(x + 30, y + 30, 30, 30);
    g2.setComposite(old);
    g.setColor(Color.black);
    g.drawString("AlphaComposite.SRC", x, y + 80);
  }
  public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.getContentPane().add(new MainClass());
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(200, 200);
    frame.setVisible(true);
  }
}

AlphaComposite.SRC_ATOP

 

import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Main extends JPanel {
  public void paint(Graphics g) {
    Graphics2D g2d = (Graphics2D) g;
    AlphaComposite ac = AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, 0.5f);
    BufferedImage buffImg = new BufferedImage(60, 60, BufferedImage.TYPE_INT_ARGB);
    Graphics2D gbi = buffImg.createGraphics();
    gbi.setPaint(Color.red);
    gbi.fillRect(0, 0, 40, 40);
    gbi.setComposite(ac);
    gbi.setPaint(Color.green);
    gbi.fillRect(5, 5, 40, 40);
    g2d.drawImage(buffImg, 20, 20, null);
  }
  public static void main(String[] args) {
    JFrame frame = new JFrame("Composition");
    frame.add(new CompositingDST_ATOP());
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(400, 120);
    frame.setVisible(true);
  }
}

AlphaComposite.SRC_IN

 
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.ruposite;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class MainClass extends JPanel {
  public void paint(Graphics g) {
    Graphics2D g2 = (Graphics2D) g;
    RenderingHints rh = g2.getRenderingHints();
    rh.put(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    g2.setRenderingHints(rh);
    int x = 40, y = 40;
    g.setColor(Color.red);
    g.fillOval(x, y, 50, 50);
    Composite old = g2.getComposite();
    g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_IN));
    g.setColor(Color.green);
    g.fillOval(x + 30, y + 30, 30, 30);
    g2.setComposite(old);
    g.setColor(Color.black);
    g.drawString("AlphaComposite.SRC_IN", x, y + 80);
  }
  public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.getContentPane().add(new MainClass());
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(200, 200);
    frame.setVisible(true);
  }
}

AlphaComposite.SRC_OUT

 
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.ruposite;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class MainClass extends JPanel {
  public void paint(Graphics g) {
    Graphics2D g2 = (Graphics2D) g;
    RenderingHints rh = g2.getRenderingHints();
    rh.put(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    g2.setRenderingHints(rh);
    int x = 40, y = 40;
    g.setColor(Color.red);
    g.fillOval(x, y, 50, 50);
    Composite old = g2.getComposite();
    g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OUT));
    g.setColor(Color.green);
    g.fillOval(x + 30, y + 30, 30, 30);
    g2.setComposite(old);
    g.setColor(Color.black);
    g.drawString("AlphaComposite.SRC_OUT", x, y + 80);
  }
  public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.getContentPane().add(new MainClass());
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(200, 200);
    frame.setVisible(true);
  }
}

AlphaComposite.SRC_OVER

 
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.ruposite;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class MainClass extends JPanel {
  public void paint(Graphics g) {
    Graphics2D g2 = (Graphics2D) g;
    RenderingHints rh = g2.getRenderingHints();
    rh.put(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    g2.setRenderingHints(rh);
    int x = 40, y = 40;
    g.setColor(Color.red);
    g.fillOval(x, y, 50, 50);
    Composite old = g2.getComposite();
    g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER));
    g.setColor(Color.green);
    g.fillOval(x + 30, y + 30, 30, 30);
    g2.setComposite(old);
    g.setColor(Color.black);
    g.drawString("AlphaComposite.SRC_OVER", x, y + 80);
  }
  public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.getContentPane().add(new MainClass());
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(200, 200);
    frame.setVisible(true);
  }
}