/**
 * Copyright 2007 DFKI GmbH.
 * All Rights Reserved.  Use is subject to license terms.
 *
 * This file is part of MARY TTS.
 *
 * MARY TTS is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, version 3 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
package marytts.tools.redstart;

import java.awt.AWTException;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.image.BufferedImage;
import java.awt.image.ConvolveOp;
import java.awt.image.Kernel;
import java.io.IOException;

import javax.imageio.ImageIO;
import javax.swing.JWindow;

/**
 * Code for shadowed window taken from http://www.javalobby.org/java/forums/t17720
 * 
 * @author (taken by) Mat Wilson <mat.wilson@dfki.de>
 */

public class Splash extends JWindow {
	private BufferedImage splash = null;

	public Splash() throws IOException {
		this(ImageIO.read(Splash.class.getResourceAsStream("splash_bg.png")));
	}

	public Splash(BufferedImage image) {
		createShadowPicture(image);
	}

	public void paint(Graphics g) {
		if (splash != null) {
			g.drawImage(splash, 0, 0, null);
		}
	}

	private void createShadowPicture(BufferedImage image) {
		int width = image.getWidth();
		int height = image.getHeight();
		int extra = 0;
		if (System.getProperty("os.name").equalsIgnoreCase("Windows XP")) {
			extra = 14; // Only create shadow if Windows XP (avoids double shadow in Mac OS; not tested for other OSes)
		}

		setSize(new Dimension(width + extra, height + extra));
		setLocationRelativeTo(null);
		Rectangle windowRect = getBounds();

		splash = new BufferedImage(width + extra, height + extra, BufferedImage.TYPE_INT_ARGB);
		Graphics2D g2 = (Graphics2D) splash.getGraphics();

		try {
			Robot robot = new Robot(getGraphicsConfiguration().getDevice());
			BufferedImage capture = robot.createScreenCapture(new Rectangle(windowRect.x, windowRect.y, windowRect.width + extra,
					windowRect.height + extra));
			g2.drawImage(capture, null, 0, 0);
		} catch (AWTException e) {
		}

		BufferedImage shadow = new BufferedImage(width + extra, height + extra, BufferedImage.TYPE_INT_ARGB);
		Graphics g = shadow.getGraphics();
		g.setColor(new Color(0.0f, 0.0f, 0.0f, 0.3f));
		g.fillRoundRect(6, 6, width, height, 12, 12);

		g2.drawImage(shadow, getBlurOp(7), 0, 0);
		g2.drawImage(image, 0, 0, this);
	}

	private ConvolveOp getBlurOp(int size) {
		float[] data = new float[size * size];
		float value = 1 / (float) (size * size);
		for (int i = 0; i < data.length; i++) {
			data[i] = value;
		}
		return new ConvolveOp(new Kernel(size, size, data));
	}

}