84 lines
2.7 KiB
Java
84 lines
2.7 KiB
Java
/*
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* Copyright (c) 2008, 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @key headful
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* @bug 6685312
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* @summary Check advance of LCD text on a scaled graphics.
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*/
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import javax.swing.*;
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import java.awt.*;
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import static java.awt.RenderingHints.*;
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public class ScaledLCDTextMetrics extends Component {
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public static void main(String[] args) {
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JFrame f = new JFrame();
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f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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f.add("Center", new ScaledLCDTextMetrics());
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f.pack();
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f.setVisible(true);
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}
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public Dimension getPreferredSize() {
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return new Dimension(200,100);
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}
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public void paint(Graphics g) {
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Graphics2D g2 = (Graphics2D)g;
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Font f = new Font("Tahoma", Font.PLAIN, 11);
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g.setFont(f);
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g.setColor(Color.white);
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g.fillRect(0,0,400,300);
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g.setColor(Color.black);
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g2.setRenderingHint(KEY_TEXT_ANTIALIASING,VALUE_TEXT_ANTIALIAS_LCD_HRGB);
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String text = "ABCDEFGHIJKLI";
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FontMetrics fm1 = g2.getFontMetrics();
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int adv1 = fm1.stringWidth(text);
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g.drawString(text, 5, 20);
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g2.scale(2,2);
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FontMetrics fm2 = g2.getFontMetrics();
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int adv2 = fm2.stringWidth(text);
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g.drawString(text, 5, 40);
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double frac = Math.abs(adv1/(double)adv2);
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System.out.println("scalex1: " + adv1);
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System.out.println("scalex2: " + adv2);
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System.out.println("Fraction : "+ frac);
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// adv1 will not be exactly the same as adv2, but should differ
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// only by a fraction.
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if (frac < 0.8 || frac > 1.2) {
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throw new RuntimeException("Metrics differ " +
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"Adv1="+adv1+" Adv2="+adv2+" Fraction="+frac);
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}
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}
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}
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