121 lines
3.9 KiB
Java
121 lines
3.9 KiB
Java
import java.awt.*;
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import java.awt.event.*;
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import java.awt.image.*;
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import java.util.Arrays;
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import java.util.Random;
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import javax.swing.*;
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public class ImageNoise {
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int framecount = 0;
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int fps = 0;
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BufferedImage image;
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Kernel kernel;
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ConvolveOp cop;
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JFrame frame = new JFrame("Java Image Noise");
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JPanel panel = new JPanel() {
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private int show_fps = 0; // 0 = blur + FPS; 1 = FPS only; 2 = neither
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private MouseAdapter ma = new MouseAdapter() {
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@Override
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public void mouseClicked(MouseEvent e) {
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show_fps = (show_fps + 1) % 3;
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}
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};
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{addMouseListener(ma);}
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@Override
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public Dimension getPreferredSize() {
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return new Dimension(320, 240);
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}
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@Override
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@SuppressWarnings("fallthrough")
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public void paintComponent(Graphics g1) {
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Graphics2D g = (Graphics2D) g1;
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drawNoise();
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g.drawImage(image, 0, 0, null);
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switch (show_fps) {
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case 0:
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// add blur behind FPS
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int xblur = getWidth() - 130, yblur = getHeight() - 32;
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BufferedImage bc = image.getSubimage(xblur, yblur, 115, 32);
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BufferedImage bs = new BufferedImage(bc.getWidth(), bc.getHeight(),
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BufferedImage.TYPE_BYTE_GRAY);
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cop.filter(bc, bs);
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g.drawImage(bs, xblur, yblur , null);
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case 1:
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// add FPS text; case fallthough is deliberate
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g.setColor(Color.RED);
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g.setFont(new Font("Monospaced", Font.BOLD, 20));
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g.drawString("FPS: " + fps, getWidth() - 120, getHeight() - 10);
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}
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framecount++;
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}
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};
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// Timer to trigger update display, with 1 ms delay
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Timer repainter = new Timer(1, new ActionListener() {
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@Override
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public void actionPerformed(ActionEvent e) {
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panel.repaint();
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}
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});
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// Timer to check FPS, once per second
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Timer framerateChecker = new Timer(1000, new ActionListener() {
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@Override
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public void actionPerformed(ActionEvent e) {
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fps = framecount;
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framecount = 0;
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}
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});
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public ImageNoise() {
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// Intitalize kernel describing blur, and convolve operation based on this
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float[] vals = new float[121];
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Arrays.fill(vals, 1/121f);
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kernel = new Kernel(11, 11, vals);
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cop = new ConvolveOp(kernel, ConvolveOp.EDGE_NO_OP, null);
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// Initialize frame and timers
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frame.add(panel);
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frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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frame.pack();
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frame.setVisible(true);
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repainter.start();
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framerateChecker.start();
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}
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void drawNoise() {
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int w = panel.getWidth(), h = panel.getHeight();
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// Check if our image is null or window has been resized, requiring new image
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if (null == image || image.getWidth() != w || image.getHeight() != h) {
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image = new BufferedImage(w, h, BufferedImage.TYPE_BYTE_GRAY);
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}
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Random rand = new Random();
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int[] data = new int[w * h];
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// Each int has 32 bits so we can use each bit for a different pixel - much faster
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for (int x = 0; x < w * h / 32; x++) {
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int r = rand.nextInt();
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for (int i = 0; i < 32; i++) {
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data[x * 32 + i] = (r & 1) * Integer.MAX_VALUE;
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r >>>= 1;
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}
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}
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// Copy raw data to the image's raster
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image.getRaster().setPixels(0, 0, w, h, data);
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}
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public static void main(String[] args) {
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// Invoke GUI on the Event Dispatching Thread
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SwingUtilities.invokeLater(new Runnable() {
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@Override
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public void run() {
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ImageNoise i = new ImageNoise();
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}
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});
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}
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}
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