example.txt

PImage img;
String imgFileName = "PIA15635";
String fileType = "png";

int loops = 1;

int blackValue = -16000000;
int brigthnessValue = 60;
int whiteValue = -13000000;

int row = 0;
int column = 0;

boolean saved = false;

void setup() {
  img = loadImage(imgFileName+"."+fileType);
  size(img.width, img.height);
  image(img, 0, 0);
}


void draw() {
  while(column < width-1) {
    img.loadPixels(); 
    sortColumn();
    column++;
    img.updatePixels();
  }
  
  while(row < height-1) {
    img.loadPixels(); 
    sortRow();
    row++;
    img.updatePixels();
  }
  
  image(img,0,0);
  if(!saved && frameCount >= loops) {
    saveFrame(imgFileName+"_"+mode+".png");
    saved = true;
    println("DONE"+frameCount);
    System.exit(0);
  }
}

void sortColumn() {
  int x = column;
  int y = 0;
  int yend = 0;
  
  while(yend < height-1) {
    y = getFirstNotBlackY(x, y);
    yend = getNextBlackY(x, y);
    
    if(y < 0) break;
    
    int sortLength = yend-y;
    
    color[] unsorted = new color[sortLength];
    color[] sorted = new color[sortLength];
    
    for(int i=0; i<sortLength; i++) {
      unsorted[i] = img.pixels[x + (y+i) * img.width];
    }
    
    sorted = sort(unsorted);
    
    for(int i=0; i<sortLength; i++) {
      img.pixels[x + (y+i) * img.width] = sorted[i];
    }
    
    y = yend+1;
  }
}

//BLACK
int getFirstNotBlackY(int _x, int _y) {
  int x = _x;
  int y = _y;
  color c;
  if(y < height) {
    while((c = img.pixels[x + y * img.width]) < blackValue) {
      y++;
      if(y >= height) return -1;
    }
  }
  return y;
}

int getNextBlackY(int _x, int _y) {
  int x = _x;
  int y = _y+1;
  color c;
  if(y < height) {
    while((c = img.pixels[x + y * img.width]) > blackValue) {
      y++;
      if(y >= height) return height-1;
    }
  }
  return y-1;
}