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undefect. CWE-407 — 63 sites patched across 27 ecosystems

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Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com

Patches, unit tests, benchmarks, whitepaper, and outreach briefs.
Public domain — no copyright claimed. Use freely.
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russell@unturf.com 2026-03-26 17:11:57 -04:00
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test/jdk/java/awt/Graphics2D/DrawString/ScaledLCDTextMetrics.java Normal file
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/*
* Copyright (c) 2008, 2016, 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
* @key headful
* @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);
}
}
}