/**
  * Set current pen color. Default to black if null.
  *
  * @param c new pen color.
  */
 public void setColor(Color c) {
   if (c != null) {
     m_localGraphicsState.setColor(c);
     if (m_psGraphicsState.getColor().equals(c)) {
       return;
     }
     m_psGraphicsState.setColor(c);
   } else {
     m_localGraphicsState.setColor(Color.black);
     m_psGraphicsState.setColor(getColor());
   }
   m_printstream.print(getColor().getRed() / 255.0);
   m_printstream.print(" ");
   m_printstream.print(getColor().getGreen() / 255.0);
   m_printstream.print(" ");
   m_printstream.print(getColor().getBlue() / 255.0);
   m_printstream.println(" setrgbcolor");
 }
  /**
   * PS see http://astronomy.swin.edu.au/~pbourke/geomformats/postscript/ Java
   * http://show.docjava.com:8086/book/cgij/doc/ip/graphics/SimpleImageFrame.java.html
   */
  public boolean drawImage(
      Image img, int x, int y, int width, int height, Color bgcolor, ImageObserver observer) {
    try {
      // get data from image
      int[] pixels = new int[width * height];
      PixelGrabber grabber = new PixelGrabber(img, 0, 0, width, height, pixels, 0, width);
      grabber.grabPixels();
      ColorModel model = ColorModel.getRGBdefault();

      // print data to ps
      m_printstream.println("gsave");
      m_printstream.println(
          xTransform(xScale(x)) + " " + (yTransform(yScale(y)) - yScale(height)) + " translate");
      m_printstream.println(xScale(width) + " " + yScale(height) + " scale");
      m_printstream.println(
          width + " " + height + " " + "8" + " [" + width + " 0 0 " + (-height) + " 0 " + height
              + "]");
      m_printstream.println("{<");

      int index;
      for (int i = 0; i < height; i++) {
        for (int j = 0; j < width; j++) {
          index = i * width + j;
          m_printstream.print(toHex(model.getRed(pixels[index])));
          m_printstream.print(toHex(model.getGreen(pixels[index])));
          m_printstream.print(toHex(model.getBlue(pixels[index])));
        }
        m_printstream.println();
      }

      m_printstream.println(">}");
      m_printstream.println("false 3 colorimage");
      m_printstream.println("grestore");
      return true;
    } catch (Exception e) {
      e.printStackTrace();
      return false;
    }
  }