diff options
Diffstat (limited to 'src/aufgaben/imageio/Aufgabe1.java')
| -rwxr-xr-x | src/aufgaben/imageio/Aufgabe1.java | 193 |
1 files changed, 193 insertions, 0 deletions
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)
+ };
+ }
+
+}
|