srecord noeq Hi15ImageStreaks(Hi15Image inputImage) {
  // x values of streak ends
  new IntBuffer streakData;
  int[] lineStarts;
  
  run {
    int w = inputImage.w(), h = inputImage.h();
    lineStarts = new int[h];
    short[] pixels = inputImage.pixels;
    int iPixel = 0;
    
    for y to h: {
      lineStarts[y] = streakData.size();
      int lineEnd = iPixel+w;
      while (iPixel < lineEnd) {
        short color = pixels[iPixel];
        do
          ++iPixel;
        while (iPixel < lineEnd && pixels[iPixel] == color);
        streakData.add(iPixel);
      }
    }
  }
  
  selfType runAndReturn() { run(); this; }
}