Examples of java.awt.image.VolatileImage

java.awt.image.VolatileImage
e creation VolatileImage vImg = createVolatileImage(w, h); // rendering to the image void renderOffscreen() { do { if (vImg.validate(getGraphicsConfiguration()) == VolatileImage.IMAGE_INCOMPATIBLE) { // old vImg doesn't work with new GraphicsConfig; re-create it vImg = createVolatileImage(w, h); } Graphics2D g = vImg.createGraphics(); // // miscellaneous rendering commands... // g.dispose(); } while (vImg.contentsLost()); } // copying from the image (here, gScreen is the Graphics // object for the onscreen window) do { int returnCode = vImg.validate(getGraphicsConfiguration()); if (returnCode == VolatileImage.IMAGE_RESTORED) { // Contents need to be restored renderOffscreen(); // restore contents } else if (returnCode == VolatileImage.IMAGE_INCOMPATIBLE) { // old vImg doesn't work with new GraphicsConfig; re-create it vImg = createVolatileImage(w, h); renderOffscreen(); } gScreen.drawImage(vImg, 0, 0, this); } while (vImg.contentsLost());
Note that this class subclasses from the {@link Image} class, whichincludes methods that take an {@link ImageObserver} parameter forasynchronous notifications as information is received from a potential {@link ImageProducer}. Since this VolatileImage is not loaded from an asynchronous source, the various methods that take an ImageObserver parameter will behave as if the data has already been obtained from the ImageProducer. Specifically, this means that the return values from such methods will never indicate that the information is not yet available and the ImageObserver used in such methods will never need to be recorded for an asynchronous callback notification. @since 1.4

      {
        comp = comp.parent;
        p = comp == null ? null : comp.peer;
      }


    VolatileImage im = null;
    if (p != null)
      im = peer.createVolatileImage(width, height);
    return im;
  }

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     * model is compatible with this <code>GraphicsConfiguration</code>.
     * @see Component#createVolatileImage(int, int)
     * @since 1.4
     */
    public VolatileImage createCompatibleVolatileImage(int width, int height) {
        VolatileImage vi = null;
        try {
            vi = createCompatibleVolatileImage(width, height,
                                               null, Transparency.OPAQUE);
        } catch (AWTException e) {
            // shouldn't happen: we're passing in null caps

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     * @since 1.5
     */
    public VolatileImage createCompatibleVolatileImage(int width, int height,
                                                       int transparency)
    {
        VolatileImage vi = null;
        try {
            vi = createCompatibleVolatileImage(width, height, null, transparency);
        } catch (AWTException e) {
            // shouldn't happen: we're passing in null caps
            assert false;

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     * @since 1.5
     */
    public VolatileImage createCompatibleVolatileImage(int width, int height,
        ImageCapabilities caps, int transparency) throws AWTException
    {
        VolatileImage vi =
            new SunVolatileImage(this, width, height, transparency, caps);
        if (caps != null && caps.isAccelerated() &&
            !vi.getCapabilities().isAccelerated())
        {
            throw new AWTException("Supplied image capabilities could not " +
                                   "be met by this graphics configuration.");
        }
        return vi;

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        Dimension maxSize = getDoubleBufferMaximumSize();
        int width = proposedWidth < 1 ? 1 :
            (proposedWidth > maxSize.width? maxSize.width : proposedWidth);
        int height = proposedHeight < 1 ? 1 :
            (proposedHeight > maxSize.height? maxSize.height : proposedHeight);
        VolatileImage image = volatileMap.get(config);
        if (image == null || image.getWidth() < width ||
                             image.getHeight() < height) {
            if (image != null) {
                image.flush();
            }
            image = config.createCompatibleVolatileImage(width, height);
            volatileMap.put(config, image);
        }
        return image;

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        }
        // Clear out the VolatileImages
        Iterator gcs = volatileMap.keySet().iterator();
        while (gcs.hasNext()) {
            GraphicsConfiguration gc = (GraphicsConfiguration)gcs.next();
            VolatileImage image = (VolatileImage)volatileMap.get(gc);
            if (image.getWidth() > width || image.getHeight() > height) {
                image.flush();
                gcs.remove();
            }
        }
    }

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            boolean paintCompleted = false;
            Image offscreen;
            if (repaintManager.useVolatileDoubleBuffer() &&
                (offscreen = getValidImage(repaintManager.
                getVolatileOffscreenBuffer(bufferComponent, w, h))) != null) {
                VolatileImage vImage = (java.awt.image.VolatileImage)offscreen;
                GraphicsConfiguration gc = bufferComponent.
                                            getGraphicsConfiguration();
                for (int i = 0; !paintCompleted &&
                         i < RepaintManager.VOLATILE_LOOP_MAX; i++) {
                    if (vImage.validate(gc) ==
                                   VolatileImage.IMAGE_INCOMPATIBLE) {
                        repaintManager.resetVolatileDoubleBuffer(gc);
                        offscreen = repaintManager.getVolatileOffscreenBuffer(
                            bufferComponent,w, h);
                        vImage = (java.awt.image.VolatileImage)offscreen;
                    }
                    paintDoubleBuffered(paintingComponent, vImage, g, x, y,
                                        w, h);
                    paintCompleted = !vImage.contentsLost();
                }
            }
            // VolatileImage painting loop failed, fallback to regular
            // offscreen buffer
            if (!paintCompleted && (offscreen = getValidImage(

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        if (repaintManager.useVolatileDoubleBuffer() &&
            (offscreen = repaintManager.getVolatileOffscreenBuffer(
                bufferComponent,clipW,clipH)) != null &&
            (offscreen.getWidth(null) > 0 && offscreen.getHeight(null) > 0)) {
  
     VolatileImage vImage = (java.awt.image.VolatileImage)offscreen;
           GraphicsConfiguration gc = bufferComponent.
                                            getGraphicsConfiguration();
     for (int i = 0; !paintCompleted && i < RepaintManager.VOLATILE_LOOP_MAX; i++) {
    if (vImage.validate(gc) == VolatileImage.IMAGE_INCOMPATIBLE) {
        repaintManager.resetVolatileDoubleBuffer(gc);
        offscreen = repaintManager.getVolatileOffscreenBuffer(bufferComponent,clipW, clipH);
        vImage = (java.awt.image.VolatileImage)offscreen;
    }
          paintWithOffscreenBuffer(paintingComponent, g, clipX, clipY, clipW, clipH, offscreen);
          paintCompleted = !vImage.contentsLost();
      } 
  }
  if (!paintCompleted) {
      // VolatileImage painting loop failed, fallback to regular offscreen buffer
      if ((offscreen =

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     * model is compatible with this <code>GraphicsConfiguration</code>.
     * @see Component#createVolatileImage(int, int)
     * @since 1.4
     */
    public VolatileImage createCompatibleVolatileImage(int width, int height) {
        VolatileImage vi = null;
        try {
            vi = createCompatibleVolatileImage(width, height,
                                               null, Transparency.OPAQUE);
        } catch (AWTException e) {
            // shouldn't happen: we're passing in null caps

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     * @since 1.5
     */
    public VolatileImage createCompatibleVolatileImage(int width, int height,
                                                       int transparency)
    {
        VolatileImage vi = null;
        try {
            vi = createCompatibleVolatileImage(width, height, null, transparency);
        } catch (AWTException e) {
            // shouldn't happen: we're passing in null caps
            assert false;

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