!636

!629 // standard functions
!658 // image classes

import java.awt.*;
import java.awt.image.*;
import java.util.List;
import javax.imageio.*;

public class main {
  static RGBImage originalImage;
  
  static class Params {
    double splitPoint;
    RGB col1, col2;
    
    Params copy() {
      Params p = new Params();
      p.splitPoint = splitPoint;
      p.col1 = col1;
      p.col2 = col2;
      return p;
    }
    
    RGBImage rendered;
    RGBImage getImage() {
      if (rendered == null)
        rendered = render();
      return rendered;
    }
    
    RGBImage render() {
      int w = originalImage.getWidth(), h = originalImage.getHeight();
      RGBImage image = new RGBImage(w, h, Color.white);
      vsplit(image, this);
      return image;
    }
    
    double score = 2.0;
    double getScore() {
      if (score == 2.0)
        score = calcScore();
      return score;
    }
    
    double calcScore() {
      return diff(originalImage, getImage());
    }
    
    boolean isBetterThan(Params p) {
      return getScore() < p.getScore();
    }
  }
  
  interface Reproducer {
    public Params reproduce(RGBImage original);
  }
  
  static class TryRandom implements Reproducer {
    int n = -1;
    public Params reproduce(RGBImage original) {
      ++n;
      Params p = new Params();
      p.splitPoint = random();
      if (n % 2 == 0) {
        p.col1 = randomColor();
        p.col2 = randomColor();
      } else {
        p.col1 = probeRandomPixel(original);
        p.col2 = probeRandomPixel(original);
      }
      return p;
    }
  }
  
  static class VaryBest implements Reproducer {
    Reproducer base;
    Params best;
    
    VaryBest(Reproducer base) {
      this.base = base;
    }
    
    public Params reproduce(RGBImage original) {
      Params p = base.reproduce(original);
      if (best == null || p.isBetterThan(best))
        best = p;
      Params variation = vary(best);
      System.out.println("Best: " + best.getScore() + ", variation: " + variation.getScore());
      if (variation.isBetterThan(best)) {
        System.out.println("Using variation, diff=" + (best.getScore()-variation.getScore()));
        best = variation;
      }
      return best;
    }
    
    Params vary(Params p) {
      Params n = p.copy();
      int s = random(3);
      if (s == 0)
        varySplitPoint(n);
      else if (s == 1)
        n.col1 = varyColor(n.col1);
      else
        n.col2 = varyColor(n.col2);
      return n;
    }
    
    void varySplitPoint(Params p) {
      p.splitPoint = Math.max(0, Math.min(1, p.splitPoint+random(-0.1, 0.1)));
    }
    
    RGB varyColor(RGB col) {
      return col; // TODO
    }
  }

  // main reproduce function
  static Reproducer reproducer = new VaryBest(new TryRandom());
  static Params reproduce(RGBImage original, int ntry) {
    int w = original.getWidth(), h = original.getHeight();
    return reproducer.reproduce(original);
  }
  
  public static void main(String[] args) {
    JFrame frame = new JFrame("A JavaX Frame");
    
    final ImageSurface imageSurface = new ImageSurface();
    Component panel = imageSurface;
    
    frame.add(panel);
    frame.setBounds(100, 100, 500, 400);
    frame.setVisible(true);
    exitOnFrameClose(frame);
    
    new Thread() {
      public void run() {
        originalImage = loadImage("#1000326"); // Bryan Cranston!
        originalImage = resizeToWidth(originalImage, 100);
        
        reproduceOpenEnd(originalImage, imageSurface);
      }
    }.start();
  }
  
  static void reproduceOpenEnd(RGBImage original, ImageSurface imageSurface) {
    Params best = null;
    for (int ntry = 1; ; ntry++) {
      System.out.println("Try " + ntry + ", score: " + (best == null ? 2.0 : best.getScore()));
      Params p = reproduce(original, ntry);
      if (best == null || p != null && p.getScore() < best.getScore()) {
        System.out.println("New best! " + p.getScore());
        best = p;
        imageSurface.setImage(p.getImage());
      }
      
      if (p != null && p.getScore() == 0.0)
        break;
    }
  }
  
  static RGB probeRandomPixel(RGBImage image) {
    int x = (int) (random()*(image.getWidth()-1));
    int y = (int) (random()*(image.getHeight()-1));
    return image.getPixel(x, y);
  }
  
  static RGB randomColor() {
    return new RGB(random(), random(), random());
  }
  
  static RGBImage resizeToWidth(RGBImage image, int w) {
    return resize(image, w, (int) ((image.getHeight()*(double) w)/image.getWidth()));
  }
  
  public static RGBImage resize(RGBImage image, int w, int h) {
    if (w == image.getWidth() && h == image.getHeight()) return image;

    int[] pixels = new int[w*h];
    for (int y = 0; y < h; y++)
      for (int x = 0; x < w; x++)
        pixels[y*w+x] = image.getInt(x*image.getWidth()/w, y*image.getHeight()/h);
    return new RGBImage(w, h, pixels);
  }

  static boolean useImageCache = true;
  static RGBImage loadImage(String snippetID) {
   try {
    File dir = new File(System.getProperty("user.home"), ".tinybrain/image-cache");
    if (useImageCache) {
      dir.mkdirs();
      File file = new File(dir, snippetID + ".png");
      if (file.exists() && file.length() != 0)
        try {
          return new RGBImage(ImageIO.read(file));
        } catch (Throwable e) {
          e.printStackTrace();
          // fall back to loading from sourceforge
        }
    }

    String imageURL = getImageURL(parseSnippetID(snippetID));
    System.err.println("Loading image: " + imageURL);
    BufferedImage image = ImageIO.read(new URL(imageURL));

    if (useImageCache) {
      File tempFile = new File(dir, snippetID + ".tmp." + System.currentTimeMillis());
      ImageIO.write(image, "png", tempFile);
      tempFile.renameTo(new File(dir, snippetID + ".png"));
      //Log.info("Cached image.");
    }

    //Log.info("Loaded image.");
    return new RGBImage(image);
   } catch (IOException e) {
    throw new RuntimeException(e);
   }
  }

  static String getImageURL(long snippetID) throws IOException {
    String url;
    if (snippetID == 1000010 || snippetID == 1000012)
      url = "http://tinybrain.de:8080/tb/show-blobimage.php?id=" + snippetID;
    else
      url = "http://eyeocr.sourceforge.net/filestore/filestore.php?cmd=serve&file=blob_" + snippetID
        + "&contentType=image/png";
    return url;
  }

  public static long parseSnippetID(String snippetID) {
    return Long.parseLong(shortenSnippetID(snippetID));
  }

  private static String shortenSnippetID(String snippetID) {
    if (snippetID.startsWith("#"))
      snippetID = snippetID.substring(1);
    String httpBlaBla = "http://tinybrain.de/";
    if (snippetID.startsWith(httpBlaBla))
      snippetID = snippetID.substring(httpBlaBla.length());
    return snippetID;
  }
  
  static Random _random = new Random();
  static double random() {
    return _random.nextInt(100001)/100000.0;
  }
  
  static int random(int max) {
    return _random.nextInt(max);
  }
  
  static double random(double min, double max) {
    return min+random()*(max-min);
  }
  
  static void vsplit(RGBImage img, Params p) {
    int w = img.getWidth(), h = img.getHeight();
    for (int yy = 0; yy < h; yy++)
      for (int xx = 0; xx < w; xx++) {
        double x = ((double) xx)/(w-1);
        double y = ((double) yy)/(h-1);
        RGB col = y <= p.splitPoint ? p.col1 : p.col2;
        img.setPixel(xx, yy, col);
      }
  }
  
  public static double pixelDiff(RGB a, RGB b) {
    return (Math.abs(a.r-b.r) + Math.abs(a.g-b.g) + Math.abs(a.b-b.b))/3;
  }

  public static double diff(RGBImage image, RGBImage image2) {
    int w = image.getWidth(), h = image.getHeight();
    double sum = 0;
    for (int y = 0; y < h; y++)
      for (int x = 0; x < w; x++)
        sum += pixelDiff(image.getRGB(x, y), image2.getRGB(x, y));
    return sum/(w*h);
  }
}

Began life as a copy of #661