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