| /* |
| * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved. |
| * 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); |
| } |
| } |
| } |