1 /*
   2  * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  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  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  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 
  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 
  75     private static Graphics2D createGraphics() {
  76         BufferedImage dst = new BufferedImage(100, 100, BufferedImage.TYPE_INT_RGB);
  77         return dst.createGraphics();
  78     }
  79 }