From 84e220b332bfffb0f2dcc39b9697a6fd6691d265 Mon Sep 17 00:00:00 2001
From: Leonard Kugis <leonard@kug.is>
Date: Mon, 25 Apr 2022 18:36:30 +0200
Subject: Initial commit

---
 src/aufgaben/imageio/Aufgabe1.java | 193 +++++++++++++++++++++++++++++++++++++
 1 file changed, 193 insertions(+)
 create mode 100755 src/aufgaben/imageio/Aufgabe1.java

(limited to 'src/aufgaben/imageio/Aufgabe1.java')

diff --git a/src/aufgaben/imageio/Aufgabe1.java b/src/aufgaben/imageio/Aufgabe1.java
new file mode 100755
index 0000000..6394f80
--- /dev/null
+++ b/src/aufgaben/imageio/Aufgabe1.java
@@ -0,0 +1,193 @@
+package aufgaben.imageio;
+
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+import java.awt.image.BufferedImage;
+import java.io.BufferedInputStream;
+import java.io.BufferedOutputStream;
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.FileReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.ByteBuffer;
+
+import javax.imageio.ImageIO;
+import javax.swing.JButton;
+import javax.swing.JPanel;
+import javax.swing.JTextField;
+
+import aufgaben.Aufgabe;
+import misc.Utils;
+
+public class Aufgabe1 extends Aufgabe {
+	
+	private final int width = 500, height = 500;
+	private boolean done = false;
+	private String name;
+	private JPanel panel;
+	private JTextField inPath, outPath;
+	private JButton readButton, writeButton;
+	private BufferedImage bild;
+	
+	public Aufgabe1() {
+		name = "Lesen Speichern";
+		this.setSize(width, height);
+		this.setTitle(name);
+		this.addWindowListener(
+				new WindowAdapter() {
+					@Override
+					public void windowClosing(WindowEvent e) {
+						System.out.println("close");
+						done = true;
+					}
+				}
+		);
+		this.setLayout(null);
+	}
+
+	@Override
+	public boolean done() {
+		return done;
+	}
+
+	@Override
+	public String getName() {
+		return name;
+	}
+
+	@Override
+	public void init() {
+		inPath = new JTextField();
+		inPath.setBounds(50, 50, 200, 20);
+		outPath = new JTextField();
+		outPath.setBounds(50, 80, 200, 20);
+		readButton = new JButton("Lesen");
+		readButton.setBounds(260, 50, 100, 20);
+		readButton.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent arg0) {
+				bild = readImage(new File(inPath.getText()));
+				/*
+				try {
+					bild = ImageIO.read(new File("title.png"));
+				} catch (IOException e) {
+					e.printStackTrace();
+				}
+				*/
+				panel.repaint();
+			}
+		});
+		writeButton = new JButton("Schreiben");
+		writeButton.setBounds(260, 80, 100, 20);
+		writeButton.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent arg0) {
+				writeImage(new File(outPath.getText()), bild);
+			}
+		});
+		panel = new JPanel() {
+			public void paint(Graphics g) {
+				if(bild != null)
+					g.drawImage(bild, 0, 0, 500, 390, this);
+			}
+		};
+		panel.setBounds(0, 110, 500, 390);
+		this.add(inPath);
+		this.add(outPath);
+		this.add(readButton);
+		this.add(writeButton);
+		this.add(panel);
+		this.repaint();
+	}
+	
+	private BufferedImage getGreyImage(BufferedImage i) {
+		BufferedImage image = new BufferedImage(i.getWidth(), i.getHeight(), i.getType());
+		for(int x = 0, width = i.getWidth(); x<width; x++) {
+			for(int y = 0, height = i.getHeight(); y<height; y++) {
+				Color c = new Color(i.getRGB(x, y));
+				int h = (int)(((double)(c.getRed()+c.getGreen()+c.getBlue())/765)*255);
+				image.setRGB(x, y, new Color(h, h, h).getRGB());
+			}
+		}
+		return image;
+	}
+	
+	private BufferedImage readImage(File file) {
+		FileInputStream fis;
+		BufferedInputStream bis;
+		try {
+			fis = new FileInputStream(file);
+			bis = new BufferedInputStream(fis);
+			byte[] b = new byte[4];
+			bis.read(b);
+			int width = byteArrayToInt(b);
+			bis.read(b);
+			int height = byteArrayToInt(b);
+			bis.read(b);
+			int type = byteArrayToInt(b);
+			BufferedImage image = new BufferedImage(width, height, type);
+			for(int x = 0; x<width; x++) {
+				for(int y = 0; y<height; y++) {
+					bis.read(b);
+					image.setRGB(x, y, byteArrayToInt(b));
+				}
+			}
+			bis.close();
+			fis.close();
+			return image;
+		} catch (FileNotFoundException e) {
+			e.printStackTrace();
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		return null;
+	}
+	
+	private void writeImage(File file, BufferedImage image) {
+		FileOutputStream fos;
+		BufferedOutputStream bos;
+		try {
+			fos = new FileOutputStream(file);
+			bos = new BufferedOutputStream(fos);
+			bos.write(intToByteArray(image.getWidth()));
+			bos.write(intToByteArray(image.getHeight()));
+			bos.write(intToByteArray(image.getType()));
+			for(int x = 0, width = image.getWidth(); x<width; x++) {
+				for(int y = 0, height = image.getHeight(); y<height; y++) {
+					bos.write(intToByteArray(image.getRGB(x, y)));
+				}
+			}
+			bos.close();
+			fos.close();
+		} catch (FileNotFoundException e) {
+			e.printStackTrace();
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+	}
+	
+	public static int byteArrayToInt(byte[] b) 
+	{
+	    return   b[3] & 0xFF |
+	            (b[2] & 0xFF) << 8 |
+	            (b[1] & 0xFF) << 16 |
+	            (b[0] & 0xFF) << 24;
+	}
+
+	public static byte[] intToByteArray(int a)
+	{
+	    return new byte[] {
+	        (byte) ((a >> 24) & 0xFF),
+	        (byte) ((a >> 16) & 0xFF),   
+	        (byte) ((a >> 8) & 0xFF),   
+	        (byte) (a & 0xFF)
+	    };
+	}
+
+}
-- 
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