1 /*
   2  * Copyright (c) 2016, 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 import javax.swing.JButton;
  25 import javax.swing.SwingUtilities;
  26 import javax.swing.UIManager;
  27 import javax.swing.plaf.metal.MetalLookAndFeel;
  28 
  29 /*
  30  * @test
  31  * @bug 8076545
  32  * @summary Text size is twice bigger under Windows L&F on Win 8.1 with
  33  *          HiDPI display
  34  */
  35 public class FontScalingTest {
  36 
  37     public static void main(String[] args) throws Exception {
  38         int metalFontSize = getFontSize(MetalLookAndFeel.class.getName());
  39         int systemFontSize = getFontSize(UIManager.getSystemLookAndFeelClassName());
  40 
  41         if (Math.abs(systemFontSize - metalFontSize) > 8) {
  42             throw new RuntimeException("System L&F is too big!");
  43         }
  44     }
  45 
  46     private static int getFontSize(String laf) throws Exception {
  47 
  48         UIManager.setLookAndFeel(laf);
  49         final int[] sizes = new int[1];
  50 
  51         SwingUtilities.invokeAndWait(() -> {
  52             JButton button = new JButton("Test");
  53             sizes[0] = button.getFont().getSize();
  54         });
  55 
  56         return sizes[0];
  57     }
  58 }