undefect. CWE-407 — 63 sites patched across 27 ecosystems
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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test/jdk/java/awt/FontMetrics/ExtremeFontSizeTest.java
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test/jdk/java/awt/FontMetrics/ExtremeFontSizeTest.java
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/*
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* Copyright (c) 2024, 2025, 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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import java.awt.Font;
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import java.awt.FontMetrics;
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import java.awt.Graphics2D;
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import java.awt.GraphicsEnvironment;
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import java.awt.Rectangle;
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import java.awt.font.FontRenderContext;
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import java.awt.font.GlyphVector;
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import java.awt.geom.AffineTransform;
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import java.awt.geom.Rectangle2D;
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import java.awt.image.BufferedImage;
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import java.util.HashMap;
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import java.util.Map;
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/*
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* @test
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* @bug 8328896 8357672
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* @summary test that using very large font sizes used don't break later uses
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*/
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public class ExtremeFontSizeTest {
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static BufferedImage bi = new BufferedImage(1,1,1);
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static Graphics2D g2d = bi.createGraphics();
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static String testString = "M";
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static Font font = new Font("SansSerif", Font.PLAIN, 12);
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static int fontSize = 0;
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static boolean failed = false;
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static int[] fontSizes = { 10, 12, 1000, 2000, 20000, 100000, 8 };
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static double[] scales = { 1.0, 900.0};
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static boolean[] fms = { false, true };
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static class Key {
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int fontSize;
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double scale;
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boolean fm;
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String str;
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Key(int fs, double sc, boolean f, String s) {
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fontSize = fs;
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scale = sc;
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fm = f;
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str = s;
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}
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public boolean equals(Object o) {
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return
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(o instanceof Key k) &&
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this.fontSize == k.fontSize &&
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this.scale == k.scale &&
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this.fm == k.fm &&
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this.str.equals(k.str);
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}
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public int hashCode() {
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return fontSize + (int)scale + (fm ? 1 : 0) + str.hashCode();
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}
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}
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static class Value {
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int height;
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double strBounds;
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Rectangle pixelBounds;
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Rectangle2D visualBounds;
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Value(int h, double sb, Rectangle pb, Rectangle2D vb) {
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height = h;
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strBounds = sb;
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pixelBounds = pb;
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visualBounds = vb;
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}
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public boolean equals(Object o) {
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return
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(o instanceof Value v) &&
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this.height == v.height &&
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this.strBounds == v.strBounds &&
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this.pixelBounds.equals(v.pixelBounds) &&
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this.visualBounds.equals(v.visualBounds);
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}
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public int hashCode() {
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return height + (int)strBounds + pixelBounds.hashCode() + visualBounds.hashCode();
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}
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}
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static Map<Key, Value> metricsMap = new HashMap<Key, Value>();
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public static void main(String[] args) {
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Font[] fonts = GraphicsEnvironment.getLocalGraphicsEnvironment().getAllFonts();
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for (Font f : fonts) {
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font = f.deriveFont(Font.PLAIN, 12);
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System.out.println("Test font : " + font);
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if (font.canDisplayUpTo(testString) != -1) {
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System.out.println("Skipping since cannot display test string");
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continue;
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}
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metricsMap = new HashMap<Key, Value>();
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testFont();
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}
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}
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static void testFont() {
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/* run tests validating bounds etc are non-zero
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* then run with extreme scales for which zero is allowed - but not required
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* then run the first tests again to be sure they are still reasonable.
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*/
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runTests(true, false);
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test(5_000_000, 10_000, false, testString, false, false, false);
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test(5_000_000, 10_000, true, testString, false, false, false);
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test(0, 0.00000001, false, testString, false, false, false);
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runTests(false, true);
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if (failed) {
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throw new RuntimeException("Test failed. Check stdout log.");
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}
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}
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static void runTests(boolean add, boolean check) {
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for (int fontSize : fontSizes) {
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for (double scale : scales) {
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for (boolean fm : fms) {
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test(fontSize, scale, fm, testString, true, add, check);
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}
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}
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}
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}
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static void test(int size, double scale, boolean fm, String str,
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boolean checkAll, boolean add, boolean check) {
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AffineTransform at = AffineTransform.getScaleInstance(scale, scale);
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FontRenderContext frc = new FontRenderContext(at, false, fm);
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font = font.deriveFont((float)size);
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g2d.setTransform(at);
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g2d.setFont(font);
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FontMetrics metrics = g2d.getFontMetrics();
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int height = metrics.getHeight();
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double width = font.getStringBounds(str, frc).getWidth();
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GlyphVector gv = font.createGlyphVector(frc, str.toCharArray());
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Rectangle pixelBounds = gv.getPixelBounds(frc, 0, 0);
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Rectangle2D visualBounds = gv.getVisualBounds();
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System.out.println("Test parameters: size="+size+" scale="+scale+" fm="+fm+" str="+str);
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System.out.println("font height="+metrics.getHeight());
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System.out.println("string bounds width="+width);
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System.out.println("GlyphVector Pixel Bounds="+ pixelBounds);
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System.out.println("GlyphVector Visual Bounds="+ visualBounds);
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if (height < 0 || width < 0 || pixelBounds.getWidth() < 0 || visualBounds.getWidth() < 0) {
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failed = true;
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System.out.println(" *** Unexpected negative size reported *** ");
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}
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if (!checkAll) {
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System.out.println();
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return;
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}
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if (height == 0 || width == 0 || (pixelBounds.isEmpty()) || visualBounds.isEmpty() ) {
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failed = true;
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System.out.println("Pixel bounds empty="+pixelBounds.isEmpty());
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System.out.println("Visual bounds empty="+visualBounds.isEmpty());
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System.out.println(" *** RESULTS NOT AS EXPECTED *** ");
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}
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System.out.println();
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Key k = null;
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Value v = null;
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if (add || check) {
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k = new Key(size, scale, fm, str);
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v = new Value(height, width, pixelBounds, visualBounds);
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}
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if (add) {
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metricsMap.put(k, v);
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}
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if (check) {
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Value vmap = metricsMap.get(k);
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if (!v.equals(vmap)) {
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failed = true;
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System.out.println("Values differ");
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}
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}
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}
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}
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