Canvas createImageCanvas(int [] pixels, int width, int height) {

	    Canvas canvas = Canvas.createIfSupported();
	    canvas.setCoordinateSpaceWidth(width);
	    canvas.setCoordinateSpaceHeight(height);

	    Context2d context = canvas.getContext2d();
	    ImageData data = context.createImageData(width, height);

	    CanvasPixelArray array = data.getData();
	    for(int i=0; i<width*height; i++) {
	        array.set(4*i+0, pixels[i] & 0xFF);
	        array.set(4*i+1, (pixels[i] >> 8) & 0xFF);
	        array.set(4*i+2, (pixels[i] >> 16) & 0xFF);
	        array.set(4*i+3, (pixels[i] >> 24) & 0xFF);
	    }
	    context.putImageData(data, 0, 0);

	    return canvas;

	}
 

private Canvas createImageCanvas(int [] pixels, int width, int height) {
	
	Canvas canvas = Canvas.createIfSupported();
	canvas.setCoordinateSpaceWidth(width);
	canvas.setCoordinateSpaceHeight(height);
	
	Context2d context = canvas.getContext2d();
	ImageData data = context.createImageData(width, height);

	CanvasPixelArray array = data.getData();
	for(int i=0; i<width*height; i++) { // ABGR
		array.set(4*i+0, pixels[i] & 0xFF);
		array.set(4*i+1, (pixels[i] >> 8) & 0xFF);
		array.set(4*i+2, (pixels[i] >> 16) & 0xFF);
		array.set(4*i+3, (pixels[i] >> 24) & 0xFF);
	}
	context.putImageData(data, 0, 0);
	
	canvas.getElement().getStyle().setMargin(4, Unit.PX);
	
	return canvas;
	
}
 

private static int measureHeight(Font font, String text) {
  Canvas canvas = canvas();
  Context2d ctx = canvas.getContext2d();

  ctx.setFont(getFontString(font));
  ctx.setFillStyle("rgb(255, 0, 0)");

  int width = (int) ctx.measureText(text).getWidth();
  int canvasHeight = font.getSize() * 2;
  canvas.setHeight(canvasHeight + "px");
  canvas.setHeight(font.getSize() * 2 + "px");
  canvas.setWidth(width + "px");

  ctx.fillText(text, 0, font.getSize());
  ImageData data = ctx.getImageData(0, 0, width, canvasHeight);
  int firstY = canvasHeight - 1;
  int lastY = 0;
  for (int x = 0; x < width; x++) {
    for (int y = 0; y < canvasHeight; y++) {
      int red = data.getRedAt(x, y);
      if (red != 0) {
        if (firstY > y) {
          firstY = y;
        }
        if (lastY < y) {
          lastY = y;
        }
      }
    }
  }
  return lastY - firstY;
}