1 /*
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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
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23 
24 /*
25  * @test    RotatedFontMetricsTest
26  * @bug     8139178
27  * @summary This test verifies that rotation does not affect font metrics.
28  * @run     main RotatedFontMetricsTest
29  */
30 
31 import java.awt.Font;
32 import java.awt.FontMetrics;
33 import java.awt.Graphics2D;
34 import java.awt.image.BufferedImage;
35 
36 public class RotatedFontMetricsTest {
37     static final int FONT_SIZE = Integer.getInteger("font.size", 20);
38 
main(String .... args)39     public static void main(String ... args) {
40         Font font = new Font(Font.DIALOG, Font.PLAIN, FONT_SIZE);
41         Graphics2D g2d = createGraphics();
42 
43         FontMetrics ref = null;
44         RuntimeException failure = null;
45         for (int a = 0; a < 360; a += 15) {
46             Graphics2D g = (Graphics2D)g2d.create();
47             g.rotate(Math.toRadians(a));
48             FontMetrics m = g.getFontMetrics(font);
49             g.dispose();
50 
51             boolean status = true;
52             if (ref == null) {
53                 ref = m;
54             } else {
55                 status = ref.getAscent() == m.getAscent() &&
56                         ref.getDescent() == m.getDescent() &&
57                         ref.getLeading() == m.getLeading() &&
58                         ref.getMaxAdvance() == m.getMaxAdvance();
59             }
60 
61             System.out.printf("Metrics a%d, d%d, l%d, m%d (%d) %s\n",
62                     m.getAscent(), m.getDescent(), m.getLeading(), m.getMaxAdvance(),
63                     (int)a, status ? "OK" : "FAIL");
64 
65             if (!status && failure == null) {
66                 failure = new RuntimeException("Font metrics differ for angle " + a);
67             }
68         }
69         if (failure != null) {
70             throw failure;
71         }
72         System.out.println("done");
73     }
74 
createGraphics()75     private static Graphics2D createGraphics() {
76         BufferedImage dst = new BufferedImage(100, 100, BufferedImage.TYPE_INT_RGB);
77         return dst.createGraphics();
78     }
79 }
80