/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code 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 General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/**

 * @test

 * @bug 6685312

 * @summary Check advance of LCD text on a scaled graphics.

 */

import javax.swing.*;

import java.awt.*;

import static java.awt.RenderingHints.*;

public class ScaledLCDTextMetrics extends Component {

    public static void main(String[] args) {

        JFrame f = new JFrame();

        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        f.add("Center", new ScaledLCDTextMetrics());

        f.pack();

        f.setVisible(true);

    }

    public Dimension getPreferredSize() {

      return new Dimension(200,100);

    }

    public void paint(Graphics g) {

       Graphics2D g2 = (Graphics2D)g;

       Font f = new Font("Tahoma", Font.PLAIN, 11);

       g.setFont(f);

       g.setColor(Color.white);

       g.fillRect(0,0,400,300);

       g.setColor(Color.black);

       g2.setRenderingHint(KEY_TEXT_ANTIALIASING,VALUE_TEXT_ANTIALIAS_LCD_HRGB);

       String text = "ABCDEFGHIJKLI";

       FontMetrics fm1 = g2.getFontMetrics();

       int adv1 = fm1.stringWidth(text);

       g.drawString(text, 5, 20);

       g2.scale(2,2);

       FontMetrics fm2 = g2.getFontMetrics();

       int adv2 = fm2.stringWidth(text);

       g.drawString(text, 5, 40);

       double frac = Math.abs(adv1/(double)adv2);

       System.out.println("scalex1: " + adv1);

       System.out.println("scalex2: " + adv2);

       System.out.println("Fraction : "+ frac);

       // adv1 will not be exactly the same as adv2, but should differ

       // only by a fraction.

       if (frac < 0.8 || frac > 1.2) {

           throw new RuntimeException("Metrics differ " +

           "Adv1="+adv1+" Adv2="+adv2+" Fraction="+frac);

       }

    }

}