Java Code Examples for org.eclipse.swt.graphics.Image#getDevice()

/**
 * Cross fade from image1 to image2 on obj.
 * 
 * @param obj
 * @param image1
 * @param image2
 * @param lengthMilli
 * @param movement
 * @param onStop
 * @param onCancel
 */
public CrossFadeEffect(IImageObject obj, Image image1, Image image2,
		long lengthMilli, IMovement movement, Runnable onStop,
		Runnable onCancel) {
	super(lengthMilli, movement, onStop, onCancel);
	this.obj = obj;
	this.image1 = image1;
	this.image2 = image2;

	if (!image1.getBounds().equals(image2.getBounds())) {
		throw new IllegalArgumentException(
				"Both image must have the same dimensions");
	}

	easingFunction.init(0, 1, (int) lengthMilli);

	buffer = new Image(image1.getDevice(), image1.getBounds().width,
			image1.getBounds().height);
	gc = new GC(buffer);
}
 

/**
 * Returns a new scaled image.
 *
 * @param source the image to be scaled
 * @param newWidth new width of the image
 * @param newHeight new height of the image
 * @return a scaled image of the source
 */
public static Image resize(final Image source, final int newWidth, final int newHeight) {
	if (source == null) {
		return null;
	}

	if (source.isDisposed()) {
		SWT.error(SWT.ERROR_WIDGET_DISPOSED);
	}

	final Image scaledImage = new Image(source.getDevice(), newWidth, newHeight);
	final GC gc = new GC(scaledImage);
	gc.setAntialias(SWT.ON);
	gc.setInterpolation(SWT.HIGH);
	gc.drawImage(source, 0, 0, source.getBounds().width, source.getBounds().height, 0, 0, newWidth, newHeight);
	gc.dispose();

	return scaledImage;
}
 

@Override
public void paintControl(PaintEvent event) {
    super.paintControl(event);

    Image image = Objects.requireNonNull((Image) fCanvas.getData(IMAGE_KEY));

    Image rangeRectangleImage = new Image(image.getDevice(), image, SWT.IMAGE_COPY);
    GC rangeWindowGC = new GC(rangeRectangleImage);

    if ((fScaledData != null) && (fRangeDuration != 0 || fDragState == DRAG_ZOOM)) {
        drawTimeRangeWindow(rangeWindowGC, fRangeStartTime, fRangeDuration);
    }

    // Draws the buffer image onto the canvas.
    event.gc.drawImage(rangeRectangleImage, 0, 0);

    rangeWindowGC.dispose();
    rangeRectangleImage.dispose();
}
 

@Override
public void paintControl(PaintEvent event) {
    super.paintControl(event);

    if (fDragState == DRAG_ZOOM) {
        Image image = Objects.requireNonNull((Image) fCanvas.getData(IMAGE_KEY));

        Image rangeRectangleImage = new Image(image.getDevice(), image, SWT.IMAGE_COPY);
        GC rangeWindowGC = new GC(rangeRectangleImage);

        drawTimeRangeWindow(rangeWindowGC, fRangeStartTime, fRangeDuration);

        // Draws the buffer image onto the canvas.
        event.gc.drawImage(rangeRectangleImage, 0, 0);

        rangeWindowGC.dispose();
        rangeRectangleImage.dispose();
    }
}
 

private ImageData createImageData(final Word word, Font font, Point stringExtent, final double sin,
		final double cos, int x, int y, Color color) {
	Image img = new Image(null, x, y);
	word.width = x;
	word.height = y;
	word.stringExtent = stringExtent;
	GC g = new GC(img);
	g.setAntialias(antialias);
	g.setForeground(color);
	Transform t = new Transform(img.getDevice());
	if (word.angle < 0) {
		t.translate(0, img.getBounds().height - (int) (cos * stringExtent.y));
	} else {
		t.translate((int) (sin * stringExtent.y), 0);
	}
	t.rotate(word.angle);
	g.setTransform(t);
	g.setFont(font);
	// Why is drawString so slow? between 30 and 90 percent of the whole
	// draw time...
	g.drawString(word.string, 0, 0, false);
	int max = Math.max(x, y);
	int tmp = maxSize;
	while (max < tmp) {
		tmp = tmp / 2;
	}
	tmp = tmp * 2;
	SmallRect root = new SmallRect(0, 0, tmp, tmp);
	word.tree = new RectTree(root, accuracy);
	final ImageData id = img.getImageData();
	g.dispose();
	img.dispose();
	return id;
}
 

/**
 * TODO: move to UtilityClass
 * 
 * This method disposes the input image and returns a new Image.
 * 
 * @param image
 * @param width
 * @param height
 * @return
 */
protected Image resize(Image image, int width, int height) {
	Image scaled = new Image(image.getDevice(), width, height);
	GC gc = new GC(scaled);
	gc.setAntialias(SWT.ON);
	gc.setInterpolation(SWT.HIGH);
	gc.drawImage(image, 0, 0, image.getBounds().width,
			image.getBounds().height, 0, 0, width, height);
	gc.dispose();
	image.dispose();
	return scaled;
}
 

/** Returns null, if the image is not a RGB image with 8 Bit per color value */
private static Image tintImage(Image image, Color color) {
  ImageData data = image.getImageData();
  int red = color.getRed();
  int green = color.getGreen();
  int blue = color.getBlue();

  if (data.depth < 24 || !data.palette.isDirect) return null;

  int rs = data.palette.redShift;
  int gs = data.palette.greenShift;
  int bs = data.palette.blueShift;
  int rm = data.palette.redMask;
  int gm = data.palette.greenMask;
  int bm = data.palette.blueMask;

  if (rs < 0) rs = ~rs + 1;

  if (gs < 0) gs = ~gs + 1;

  if (bs < 0) bs = ~bs + 1;

  for (int x = 0; x < data.width; x++) {
    for (int y = 0; y < data.height; y++) {
      int p = data.getPixel(x, y);
      int r = (p & rm) >>> rs;
      int g = (p & gm) >>> gs;
      int b = (p & bm) >>> bs;
      r = (r * red) / 255;
      g = (g * green) / 255;
      b = (b * blue) / 255;
      data.setPixel(x, y, (r << rs) | (g << gs) | (b << bs));
    }
  }

  return new Image(image.getDevice(), data);
}