Exemple #1
0
 /**
  * Create possibly volatile scratch image for fast painting. A scratch image can become
  * invalidated, when this happens any actions involving it are ignored, and it needs to be
  * recreated. Use isScratchImageValid() to check this.
  */
 public static Image createScratchImage(int width, int height) {
   try {
     Image img =
         (Image)
             tryMethod(
                 output_comp,
                 "createVolatileImage",
                 new Object[] {new Integer(width), new Integer(height)});
     if (img == null) {
       // no such method -> create regular image
       return output_comp.createImage(width, height);
     }
     // if (img.validate(output_comp.getGraphicsConfiguration())
     // == VolatileImage.IMAGE_INCOMPATIBLE) {
     GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
     GraphicsDevice gs = ge.getDefaultScreenDevice();
     GraphicsConfiguration gc = gs.getDefaultConfiguration();
     Integer valid = (Integer) tryMethod(img, "validate", new Object[] {gc});
     // output_comp.getGraphicsConfiguration() });
     if (valid.intValue() == 2) { // I checked, IMAGE_INCOMPATIBLE=2
       // Hmm, somehow it didn't work. Create regular image.
       return output_comp.createImage(width, height);
     }
     return img;
   } catch (java.security.AccessControlException e) {
     // we're not allowed to do this (we're probably an applet)
     return output_comp.createImage(width, height);
   }
 }
Exemple #2
0
  /**
   * Creates a device compatible BufferedImage
   *
   * @param width the width in pixels
   * @param height the height in pixels
   */
  public static BufferedImage getDeviceCompatibleImage(int width, int height) {

    GraphicsEnvironment graphicsEnvironment = GraphicsEnvironment.getLocalGraphicsEnvironment();
    GraphicsDevice screenDevice = graphicsEnvironment.getDefaultScreenDevice();
    GraphicsConfiguration graphicConfiguration = screenDevice.getDefaultConfiguration();
    BufferedImage image = graphicConfiguration.createCompatibleImage(width, height);

    return image;
  }
Exemple #3
0
 /** Create empty image with given alpha mode that should be efficient on this display */
 public static BufferedImage createCompatibleImage(int width, int height, int transparency) {
   // try {
   GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
   GraphicsDevice gs = ge.getDefaultScreenDevice();
   GraphicsConfiguration gc = gs.getDefaultConfiguration();
   // always use bitmask transparency
   BufferedImage bimage = gc.createCompatibleImage(width, height, transparency);
   return bimage;
   // } catch (HeadlessException e) { // this exception is not in 1.2
   // The system does not have a screen
   //	e.printStackTrace();
   //	return null;
   // }
 }
  // This method returns a buffered image with the contents of an image
  // Source: http://www.exampledepot.com/egs/java.awt.image/Image2Buf.html
  public static BufferedImage toBufferedImage(Image image) {
    if (image instanceof BufferedImage) {
      return (BufferedImage) image;
    }

    // This code ensures that all the pixels in the image are loaded
    image = new ImageIcon(image).getImage();

    // Determine if the image has transparent pixels; for this method's
    // implementation, see Determining If an Image Has Transparent Pixels
    boolean hasAlpha = hasAlpha(image);

    // Create a buffered image with a format that's compatible with the screen
    BufferedImage bimage = null;
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    try {
      // Determine the type of transparency of the new buffered image
      int transparency = Transparency.OPAQUE;
      if (hasAlpha) {
        transparency = Transparency.BITMASK;
      }

      // Create the buffered image
      GraphicsDevice gs = ge.getDefaultScreenDevice();
      GraphicsConfiguration gc = gs.getDefaultConfiguration();
      bimage = gc.createCompatibleImage(image.getWidth(null), image.getHeight(null), transparency);
    } catch (HeadlessException e) {
      // The system does not have a screen
    }

    if (bimage == null) {
      // Create a buffered image using the default color model
      int type = BufferedImage.TYPE_INT_RGB;
      if (hasAlpha) {
        type = BufferedImage.TYPE_INT_ARGB;
      }
      bimage = new BufferedImage(image.getWidth(null), image.getHeight(null), type);
    }

    // Copy image to buffered image
    Graphics g = bimage.createGraphics();

    // Paint the image onto the buffered image
    g.drawImage(image, 0, 0, null);
    g.dispose();

    return bimage;
  }
 public GraphicsConfiguration getDeviceConfiguration() {
   GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
   GraphicsDevice gd = ge.getDefaultScreenDevice();
   return (gd.getDefaultConfiguration());
 }