Initial data commit

Task/Image-noise/Java/image-noise.java

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