class RGB {

  public final float r, g, b;

  public RGB(float r, float g, float b) {

    this.r = r;

    this.g = g;

    this.b = b;

  }

  public RGB(double r, double g, double b) {

    this.r = (float) r;

    this.g = (float) g;

    this.b = (float) b;

  }

  public RGB(double brightness) {

    this.r = this.g = this.b = (float) brightness;

  }

  public RGB(Color color) {

    this.r = color.getRed()/255f;

    this.g = color.getGreen()/255f;

    this.b = color.getBlue()/255f;

  }

  public RGB(String hex) {

    r = Integer.parseInt(hex.substring(0, 2), 16)/255f;

    g = Integer.parseInt(hex.substring(2, 4), 16)/255f;

    b = Integer.parseInt(hex.substring(4, 6), 16)/255f;

  }

  public float getComponent(int i) {

    return i == 0 ? r : i == 1 ? g : b;

  }

  public Color getColor() {

    return new Color(r, g, b);

  }

  public static RGB newSafe(float r, float g, float b) {

    return new RGB(Math.max(0, Math.min(1, r)), Math.max(0, Math.min(1, g)), Math.max(0, Math.min(1, b)));

  }

  public int asInt() {

    return getColor().getRGB() & 0xFFFFFF;

  }

  public float getBrightness() {

    return (r+g+b)/3.0f;

  }

  public String getHexString() {

    return Integer.toHexString(asInt() | 0xFF000000).substring(2).toUpperCase();

  }

  @Override

  public boolean equals(Object o) {

    if (this == o) return true;

    if (!(o instanceof RGB)) return false;

    RGB rgb = (RGB) o;

    if (Float.compare(rgb.b, b) != 0) return false;

    if (Float.compare(rgb.g, g) != 0) return false;

    if (Float.compare(rgb.r, r) != 0) return false;

    return true;

  }

  @Override

  public int hashCode() {

    int result = (r != +0.0f ? Float.floatToIntBits(r) : 0);

    result = 31 * result + (g != +0.0f ? Float.floatToIntBits(g) : 0);

    result = 31 * result + (b != +0.0f ? Float.floatToIntBits(b) : 0);

    return result;

  }

  public boolean isBlack() {

    return r == 0f && g == 0f && b == 0f;

  }

  public boolean isWhite() {

    return r == 1f && g == 1f && b == 1f;

  }

  public String toString() {

    return getHexString();

  }

}

class RGBImage {

  private BufferedImage bufferedImage;

  private File file;

  private int width, height;

  private int[] pixels;

  // color returned when getPixel is called with out-of-bounds position

  private int background = 0xFFFFFF;

  public RGBImage(BufferedImage image) {

    this(image, null);

  }

  public RGBImage(BufferedImage image, File file) {

    this.file = file;

    bufferedImage = image;

    width = image.getWidth();

    height = image.getHeight();

    pixels = new int[width*height];

    PixelGrabber pixelGrabber = new PixelGrabber(image, 0, 0, width, height, pixels, 0, width);

    try {

      if (!pixelGrabber.grabPixels())

        throw new RuntimeException("Could not grab pixels");

      cleanPixels(); // set upper byte to 0

    } catch (InterruptedException e) {

      throw new RuntimeException(e);

    }

  }

  /** We assume it's a file name to load from */

  public RGBImage(String file) throws IOException {

    this(new File(file));

  }

  public RGBImage(Dimension size, Color color) {

    this(size.width, size.height, color);

  }

  public RGBImage(Dimension size, RGB color) {

    this(size.width, size.height, color);

  }

  private void cleanPixels() {

    for (int i = 0; i < pixels.length; i++)

      pixels[i] &= 0xFFFFFF;

  }

  public RGBImage(int width, int height, int[] pixels) {

    this.width = width;

    this.height = height;

    this.pixels = pixels;

  }

  public RGBImage(int w, int h, RGB[] pixels) {

    this.width = w;

    this.height = h;

    this.pixels = asInts(pixels);

  }

  public static int[] asInts(RGB[] pixels) {

    int[] ints = new int[pixels.length];

    for (int i = 0; i < pixels.length; i++)

      ints[i] = pixels[i] == null ? 0 : pixels[i].getColor().getRGB();

    return ints;

  }

  public RGBImage(int w, int h) {

    this(w, h, Color.black);

  }

  public RGBImage(int w, int h, RGB rgb) {

    this.width = w;

    this.height = h;

    this.pixels = new int[w*h];

    int col = rgb.asInt();

    if (col != 0)

      for (int i = 0; i < pixels.length; i++)

        pixels[i] = col;

  }

  public RGBImage(RGBImage image) {

    this(image.width, image.height, copyPixels(image.pixels));

  }

  public RGBImage(int width, int height, Color color) {

    this(width, height, new RGB(color));

  }

  public RGBImage(File file) throws IOException {

    this(javax.imageio.ImageIO.read(file));

  }

  private static int[] copyPixels(int[] pixels) {

    int[] copy = new int[pixels.length];

    System.arraycopy(pixels, 0, copy, 0, pixels.length);

    return copy;

  }

  public int getIntPixel(int x, int y) {

    if (inRange(x, y))

      return pixels[y * width + x];

    else

      return background;

  }

  public static RGB asRGB(int packed) {

    int r = (packed >> 16) & 0xFF;

    int g = (packed >> 8) & 0xFF;

    int b = packed & 0xFF;

    return new RGB(r / 255f, g / 255f, b / 255f);

  }

  public RGB getRGB(int x, int y) {

    if (inRange(x, y))

      return asRGB(pixels[y * width + x]);

    else

      return new RGB(background);

  }

  /** alias of getRGB - I kept typing getPixel instead of getRGB all the time, so I finally created it */

  public RGB getPixel(int x, int y) {

    return getRGB(x, y);

  }

  public int getWidth() {

    return width;

  }

  public int getHeight() {

    return height;

  }

  /** Attention: cached, i.e. does not change when image itself changes */

  /** @NotNull */

  public BufferedImage getBufferedImage() {

    if (bufferedImage == null) {

      bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

      //bufferedImage.setData(Raster.createRaster(new SampleModel()));

      for (int y = 0; y < height; y++)

        for (int x = 0; x < width; x++)

          bufferedImage.setRGB(x, y, pixels[y*width+x]);

    }

    return bufferedImage;

  }

  public RGBImage clip(Rectangle r) {

    r = fixClipRect(r);

    int[] newPixels;

    try {

      newPixels = new int[r.width*r.height];

    } catch (RuntimeException e) {

      System.out.println(r);

      throw e;

    }

    for (int y = 0; y < r.height; y++) {

      System.arraycopy(pixels, (y+r.y)*width+r.x, newPixels, y*r.width, r.width);

    }

    return new RGBImage(r.width, r.height, newPixels);

  }

  private Rectangle fixClipRect(Rectangle r) {

    r = r.intersection(new Rectangle(0, 0, width, height));

    if (r.isEmpty())

      r = new Rectangle(r.x, r.y, 0, 0);

    return r;

  }

  public File getFile() {

    return file;

  }

  /** can now also do GIF (not just JPEG) */

  public static RGBImage load(String fileName) {

    return load(new File(fileName));

  }

  /** can now also do GIF (not just JPEG) */

  public static RGBImage load(File file) {

    try {

      BufferedImage bufferedImage = javax.imageio.ImageIO.read(file);

      return new RGBImage(bufferedImage);

    } catch (IOException e) {

      throw new RuntimeException(e);

    }

  }

  public int getInt(int x, int y) {

    return pixels[y * width + x];

  }

  public void save(File file) throws IOException {

    String name = file.getName().toLowerCase();

    String type;

    if (name.endsWith(".png")) type = "png";

    else if (name.endsWith(".jpg") || name.endsWith(".jpeg")) type = "jpeg";

    else throw new IOException("Unknown image extension: " + name);

    javax.imageio.ImageIO.write(getBufferedImage(), type, file);

  }

  public static RGBImage dummyImage() {

    return new RGBImage(1, 1, new int[] {0xFFFFFF});

  }

  public int[] getPixels() {

    return pixels;

  }

  public void setPixel(int x, int y, RGB rgb) {

    if (x >= 0 && y >= 0 && x < width && y < height)

      pixels[y*width+x] = rgb.asInt();

  }

  public void setPixel(int x, int y, Color color) {

    setPixel(x, y, new RGB(color));

  }

  public void setPixel(int x, int y, int rgb) {

    if (x >= 0 && y >= 0 && x < width && y < height)

      pixels[y*width+x] = rgb;

  }

  public RGBImage copy() {

    return new RGBImage(this);

  }

  public boolean inRange(int x, int y) {

    return x >= 0 && y >= 0 && x < width && y < height;

  }

  public int getBackground() {

    return background;

  }

  public void setBackground(int background) {

    this.background = background;

  }

  public Dimension getSize() {

    return new Dimension(width, height);

  }

  @Override

  public boolean equals(Object o) {

    if (this == o) return true;

    if (o == null || getClass() != o.getClass()) return false;

    RGBImage rgbImage = (RGBImage) o;

    if (height != rgbImage.height) return false;

    if (width != rgbImage.width) return false;

    if (!Arrays.equals(pixels, rgbImage.pixels)) return false;

    return true;

  }

  @Override

  public int hashCode() {

    int result = width;

    result = 31 * result + height;

    result = 31 * result + Arrays.hashCode(pixels);

    return result;

  }

  public String getHex(int x, int y) {

    return getPixel(x, y).getHexString();

  }

  public RGBImage clip(int x, int y, int width, int height) {

    return clip(new Rectangle(x, y, width, height));

  }

  public RGBImage clipLine(int y) {

    return clip(0, y, width, 1);

  }

  public int numPixels() {

    return width*height;

  }

}

abstract class Surface extends JPanel {

  public Object AntiAlias = RenderingHints.VALUE_ANTIALIAS_ON;

  public Object Rendering = RenderingHints.VALUE_RENDER_SPEED;

  public AlphaComposite composite;

  public Paint texture;

  public BufferedImage bimg;

  public int imageType;

  public String name;

  public boolean clearSurface = true;

  // Demos using animated gif's that implement ImageObserver set dontThread.

  public boolean dontThread;

  protected long sleepAmount = 50; // max20 fps

  private long orig, start, frame;

  private Toolkit toolkit;

  private boolean perfMonitor, outputPerf;

  private int biw, bih;

  private boolean clearOnce;

  private boolean toBeInitialized = true;

  public Surface() {

    setDoubleBuffered(false);

    toolkit = getToolkit();

    name = this.getClass().getName();

    name = name.substring(name.indexOf(".", 7)+1);

    setImageType(0);

    // To launch an individual demo with the performance str output  :

    //    java -Djava2demo.perf= -cp Java2Demo.jar demos.Clipping.ClipAnim

    try {

      if (System.getProperty("java2demo.perf") != null) {

        perfMonitor = outputPerf = true;

      }

    } catch (Exception ex) { }

  }

    /*protected Image getImage(String name) {

        return DemoImages.getImage(name, this);

    }

    protected Font getFont(String name) {

        return DemoFonts.getFont(name);

    }*/

  public int getImageType() {

    return imageType;

  }

  public void setImageType(int imgType) {

    if (imgType == 0) {

      imageType = 1;

    } else {

      imageType = imgType;

    }

    bimg = null;

  }

  public void setAntiAlias(boolean aa) {

    AntiAlias = aa

      ? RenderingHints.VALUE_ANTIALIAS_ON

      : RenderingHints.VALUE_ANTIALIAS_OFF;

  }

  public void setRendering(boolean rd) {

    Rendering = rd

      ? RenderingHints.VALUE_RENDER_QUALITY

      : RenderingHints.VALUE_RENDER_SPEED;

  }

  public void setTexture(Object obj) {

    if (obj instanceof GradientPaint) {

      texture = new GradientPaint(0, 0, Color.white,

        getSize().width*2, 0, Color.green);

    } else {

      texture = (Paint) obj;

    }

  }

  public void setComposite(boolean cp) {

    composite = cp

      ? AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.5f)

      : null;

  }

  public void setMonitor(boolean pm) {

    perfMonitor = pm;

  }

  public void setSleepAmount(long amount) {

    sleepAmount = amount;

  }

  public long getSleepAmount() {

    return sleepAmount;

  }

  public BufferedImage createBufferedImage(Graphics2D g2,

                                           int w,

                                           int h,

                                           int imgType) {

    BufferedImage bi = null;

    if (imgType == 0) {

      bi = (BufferedImage) g2.getDeviceConfiguration().

        createCompatibleImage(w, h);

    } else if (imgType > 0 && imgType < 14) {

      bi = new BufferedImage(w, h, imgType);

    } else if (imgType == 14) {

      bi = createBinaryImage(w, h, 2);

    } else if (imgType == 15) {

      bi = createBinaryImage(w, h, 4);

    } else if (imgType == 16) {

      bi = createSGISurface(w, h, 32);

    } else if (imgType == 17) {

      bi = createSGISurface(w, h, 16);

    }

    biw = w;

    bih = h;

    return bi;

  }

  // Lookup tables for BYTE_BINARY 1, 2 and 4 bits.

  static byte[] lut1Arr = new byte[] {0, (byte)255 };

  static byte[] lut2Arr = new byte[] {0, (byte)85, (byte)170, (byte)255};

  static byte[] lut4Arr = new byte[] {0, (byte)17, (byte)34, (byte)51,

    (byte)68, (byte)85,(byte) 102, (byte)119,

    (byte)136, (byte)153, (byte)170, (byte)187,

    (byte)204, (byte)221, (byte)238, (byte)255};

  private BufferedImage createBinaryImage(int w, int h, int pixelBits) {

    int bytesPerRow = w * pixelBits / 8;

    if (w * pixelBits % 8 != 0) {

      bytesPerRow++;

    }

    byte[] imageData = new byte[h * bytesPerRow];

    IndexColorModel cm = null;

    switch (pixelBits) {

      case 1:

        cm = new IndexColorModel(pixelBits, lut1Arr.length,

          lut1Arr, lut1Arr, lut1Arr);

        break;

      case 2:

        cm = new IndexColorModel(pixelBits, lut2Arr.length,

          lut2Arr, lut2Arr, lut2Arr);

        break;

      case 4:

        cm = new IndexColorModel(pixelBits, lut4Arr.length,

          lut4Arr, lut4Arr, lut4Arr);

        break;

      default:

      {new Exception("Invalid # of bit per pixel").printStackTrace();}

    }

    DataBuffer db = new DataBufferByte(imageData, imageData.length);

    WritableRaster r = Raster.createPackedRaster(db, w, h, pixelBits, null);

    return new BufferedImage(cm, r, false, null);

  }

  private BufferedImage createSGISurface(int w, int h, int pixelBits) {

    int rMask32 = 0xFF000000;

    int rMask16 = 0xF800;

    int gMask32 = 0x00FF0000;

    int gMask16 = 0x07C0;

    int bMask32 = 0x0000FF00;

    int bMask16 = 0x003E;

    DirectColorModel dcm = null;

    DataBuffer db = null;

    WritableRaster wr = null;

    switch (pixelBits) {

      case 16:

        short[] imageDataUShort = new short[w * h];

        dcm = new DirectColorModel(16, rMask16, gMask16, bMask16);

        db = new DataBufferUShort(imageDataUShort, imageDataUShort.length);

        wr = Raster.createPackedRaster(db, w, h, w,

          new int[] {rMask16, gMask16, bMask16},

          null);

        break;

      case 32:

        int[] imageDataInt = new int[w * h];

        dcm = new DirectColorModel(32, rMask32, gMask32, bMask32);

        db = new DataBufferInt(imageDataInt, imageDataInt.length);

        wr = Raster.createPackedRaster(db, w, h, w,

          new int[] {rMask32, gMask32, bMask32},

          null);

        break;

      default:

      {new Exception("Invalid # of bit per pixel").printStackTrace();}

    }

    return new BufferedImage(dcm, wr, false, null);

  }

  public Graphics2D createGraphics2D(int width,

                                     int height,

                                     BufferedImage bi,

                                     Graphics g) {

    Graphics2D g2 = null;

    if (bi != null) {

      g2 = bi.createGraphics();

    } else {

      g2 = (Graphics2D) g;

    }

    g2.setBackground(getBackground());

    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, AntiAlias);

    g2.setRenderingHint(RenderingHints.KEY_RENDERING, Rendering);

    if (clearSurface || clearOnce) {

      g2.clearRect(0, 0, width, height);

      clearOnce = false;

    }

    if (texture != null) {

      // set composite to opaque for texture fills

      g2.setComposite(AlphaComposite.SrcOver);

      g2.setPaint(texture);

      g2.fillRect(0, 0, width, height);

    }

    if (composite != null) {

      g2.setComposite(composite);

    }

    return g2;

  }

  public abstract void render(int w, int h, Graphics2D g);

  /**

   * It's possible to turn off double-buffering for just the repaint

   * calls invoked directly on the non double buffered component.

   * This can be done by overriding paintImmediately() (which is called

   * as a result of repaint) and getting the current RepaintManager and

   * turning off double buffering in the RepaintManager before calling

   * super.paintImmediately(g).

   */

  public void paintImmediately(int x,int y,int w, int h) {

    RepaintManager repaintManager = null;

    boolean save = true;

    if (!isDoubleBuffered()) {

      repaintManager = RepaintManager.currentManager(this);

      save = repaintManager.isDoubleBufferingEnabled();

      repaintManager.setDoubleBufferingEnabled(false);

    }

    super.paintImmediately(x, y, w, h);

    if (repaintManager != null) {

      repaintManager.setDoubleBufferingEnabled(save);

    }

  }

  public void paint(Graphics g) {

    Dimension d = getSize();

    if (imageType == 1)

      bimg = null;

    else if (bimg == null || biw != d.width || bih != d.height) {

      bimg = createBufferedImage((Graphics2D)g,

        d.width, d.height, imageType-2);

      clearOnce = true;

      toBeInitialized = true;

    }

    if (toBeInitialized) {

      toBeInitialized = false;

      startClock();

    }

    Graphics2D g2 = createGraphics2D(d.width, d.height, bimg, g);

    render(d.width, d.height, g2);

    g2.dispose();

    if (bimg != null)  {

      g.drawImage(bimg, 0, 0, null);

      toolkit.sync();

    }

  }

  public void startClock() {

    orig = System.currentTimeMillis();

    start = orig;

    frame = 0;

  }

  private static final int REPORTFRAMES = 30;

  public static void setAlpha(Graphics2D g, float alpha) {

    g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, alpha));

  }

}

class ImageSurface extends Surface {

  private BufferedImage image;

  private double zoomX = 1, zoomY = 1;

  private Rectangle selection;

  public ImageSurface() {

    this(new RGBImage(1, 1, new int[] { 0xFFFFFF }));

  }

  public ImageSurface(RGBImage image) {

    this(image.getBufferedImage());

  }

  public ImageSurface(BufferedImage image) {

    clearSurface = false;

    this.image = image;

    /*addMouseMotionListener(new MouseAdapter() {

      public void mouseMoved(MouseEvent e) {

        getMousePosition()

      }

    });*/

  }

  public ImageSurface(RGBImage image, double zoom) {

    this(image);

    setZoom(zoom);

  }

  public void render(int w, int h, Graphics2D g) {

    g.setColor(Color.white);

    g.fillRect(0, 0, w, h);

    if (image != null)

      g.drawImage(image, 0, 0, getZoomedWidth(), getZoomedHeight(), null);

    if (selection != null) {

      // drawRect is inclusive, selection is exclusive, so... whatever, tests show it's cool.

      drawSelectionRect(g, selection, Color.green, Color.white);

    }

  }

  public void drawSelectionRect(Graphics2D g, Rectangle selection, Color green, Color white) {

    g.setColor(green);

    int top = (int) (selection.y * zoomY);

    int bottom = (int) ((selection.y+selection.height) * zoomY);

    int left = (int) (selection.x * zoomX);

    int right = (int) ((selection.x+selection.width) * zoomX);

    g.drawRect(left-1, top-1, right-left+1, bottom-top+1);

    g.setColor(white);

    g.drawRect(left - 2, top - 2, right - left + 3, bottom - top + 3);

  }

  public void setZoom(double zoom) {

    setZoom(zoom, zoom);

  }

  public void setZoom(double zoomX, double zoomY) {

    this.zoomX = zoomX;

    this.zoomY = zoomY;

    revalidate();

    repaint();

  }

  public Dimension getMinimumSize() {

    int w = getZoomedWidth();

    int h = getZoomedHeight();

    Dimension min = super.getMinimumSize();

    return new Dimension(Math.max(w, min.width), Math.max(h, min.height));

  }

  private int getZoomedHeight() {

    return (int) (image.getHeight() * zoomY);

  }

  private int getZoomedWidth() {

    return (int) (image.getWidth() * zoomX);

  }

  public void setImage(RGBImage image) {

    setImage(image.getBufferedImage());

  }

  public void setImage(BufferedImage image) {

    this.image = image;

    revalidate();

    repaint();

  }

  public BufferedImage getImage() {

    return image;

  }

  public double getZoomX() {

    return zoomX;

  }

  public double getZoomY() {

    return zoomY;

  }

  public Dimension getPreferredSize() {

    return new Dimension(getZoomedWidth(), getZoomedHeight());

  }

  /** returns a scrollpane with the scroll-mode prevent-garbage-drawing fix applied */

  public JScrollPane makeScrollPane() {

    JScrollPane scrollPane = new JScrollPane(this);

    scrollPane.getViewport().setScrollMode(JViewport.BACKINGSTORE_SCROLL_MODE);

    return scrollPane;

  }

  public void zoomToDisplaySize() {

    if (image == null) return;

    Dimension display = getDisplaySize();

    double xRatio = display.width/(double) image.getWidth();

    double yRatio = display.height/(double) image.getHeight();

    setZoom(Math.min(xRatio, yRatio));

    revalidate();

  }

  /** tricky magic to get parent scroll pane */

  private Dimension getDisplaySize() {

    Container c = getParent();

    while (c != null) {

      if (c instanceof JScrollPane)

        return c.getSize();

      c = c.getParent();

    }

    return getSize();

  }

  public void setSelection(Rectangle r) {

    selection = r;

    repaint();

  }

  public Rectangle getSelection() {

    return selection;

  }

  public RGBImage getRGBImage() {

    return new RGBImage(getImage());

  }

}