1 /*
2 * Copyright (c) 2006, 2015, 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 /**
26 * @test
27 * @bug 6216010
28 * @summary check to see that underline thickness scales.
29 * @run main UnderlineTest
30 */
31
32 import java.awt.Color;
33 import java.awt.Container;
34 import java.awt.Dimension;
35 import java.awt.Font;
36 import java.awt.Graphics;
37 import java.awt.Graphics2D;
38 import java.awt.GridLayout;
39 import java.awt.font.FontRenderContext;
40 import java.awt.font.LineMetrics;
41 import java.awt.font.TextAttribute;
42 import java.awt.font.TextLayout;
43 import java.awt.geom.AffineTransform;
44 import java.util.HashMap;
45 import javax.swing.JComponent;
46 import javax.swing.JFrame;
47 import javax.swing.JScrollPane;
48
49 public class UnderlineTest {
50 static class FontsPanel extends Container {
51 FontsPanel(Font[] fonts) {
52 setLayout(new GridLayout(0, 1));
53 for (int i = 0; i < fonts.length; ++i) {
54 add(new FontPanel(fonts[i]));
55 }
56 }
57 }
58
59 static String fps = "Stellar glyphs";
60 static Dimension fpd = new Dimension(600, 120);
61 static class FontPanel extends JComponent {
62 Font f;
63 FontPanel(Font f) {
64 this.f = f;
65 setPreferredSize(fpd);
66 setMinimumSize(fpd);
67 setMaximumSize(fpd);
68 setSize(fpd);
69 }
70
71 public void paintComponent(Graphics g) {
72 g.setColor(Color.WHITE);
73 g.fillRect(0, 0, fpd.width, fpd.height);
74
75 g.setColor(Color.RED);
76 FontRenderContext frc = ((Graphics2D)g).getFontRenderContext();
77 LineMetrics lm = f.getLineMetrics(fps, frc);
78 int h = (int)(fpd.height - 20 - lm.getAscent());
79 g.drawLine(20, h, fpd.width - 20, h);
80 h = fpd.height - 20;
81 g.drawLine(20, h, fpd.width - 20, h);
82 h = (int)(fpd.height - 20 + lm.getDescent());
83 g.drawLine(20, h, fpd.width - 20, h);
84
85 g.setColor(Color.BLACK);
86 g.setFont(f);
87 g.drawString(fps, 50, fpd.height - 20);
88 }
89 }
90
91 public static void main(String args[]) {
92 String fontName = "Lucida Sans";
93 if (args.length > 0) {
94 fontName = args[0];
95 }
96 FontRenderContext frc = new FontRenderContext(null, false, false);
97 FontRenderContext frc2 = new FontRenderContext(AffineTransform.getScaleInstance(1.5, 1.5), false, false);
98
99 Font font0 = new Font(fontName, 0, 20);
100 HashMap map = new HashMap();
101 map.put(TextAttribute.UNDERLINE, TextAttribute.UNDERLINE_ON);
102 map.put(TextAttribute.STRIKETHROUGH, TextAttribute.STRIKETHROUGH_ON);
103 Font font = font0.deriveFont(map);
104
105 System.out.println("Using font: " + font);
106
107 double rot = -Math.PI/4;
108 AffineTransform scrtx = AffineTransform.getRotateInstance(rot);
109 scrtx.scale(1, 2);
110
111 Font[] fonts = {
112 font.deriveFont(1f),
113 font.deriveFont(20f),
114 font.deriveFont(40f),
115 font.deriveFont(80f),
116 font.deriveFont(AffineTransform.getRotateInstance(rot)),
117 font.deriveFont(AffineTransform.getScaleInstance(1, 2)),
118 font.deriveFont(AffineTransform.getScaleInstance(2, 4)),
119 font.deriveFont(scrtx),
120 };
121
122 LineMetrics[] metrics = new LineMetrics[fonts.length * 2];
123 for (int i = 0; i < metrics.length; ++i) {
124 Font f = fonts[i % fonts.length];
125 FontRenderContext frcx = i < fonts.length ? frc : frc2;
126 metrics[i] = f.getLineMetrics("X", frcx);
127 // dumpMetrics("Metrics for " + f.getSize2D() + " pt. font,\n tx: " +
128 // f.getTransform() + ",\n frctx: " + frcx.getTransform(), metrics[i]);
129 }
130
131 // test for linear scale
132 // this seems to work, might need to get fancy to deal with last-significant-bit issues?
133 double ds1 = metrics[2].getStrikethroughOffset() - metrics[1].getStrikethroughOffset();
134 double du1 = metrics[2].getUnderlineThickness() - metrics[1].getUnderlineThickness();
135 double ds2 = metrics[3].getStrikethroughOffset() - metrics[2].getStrikethroughOffset();
136 double du2 = metrics[3].getUnderlineThickness() - metrics[2].getUnderlineThickness();
137 if (ds2 != ds1 * 2 || du2 != du1 * 2) {
138 throw new IllegalStateException("non-linear scale: " + ds1 + " / " + ds2 + ", " +
139 du1 + " / " + du2);
140 }
141
142 JFrame jf = new JFrame("Fonts");
143 jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
144 jf.add(new JScrollPane(new FontsPanel(fonts)));
145 jf.pack();
146 jf.setVisible(true);
147 }
148
149 static void dumpMetrics(String header, LineMetrics lm) {
150 if (header != null) {
151 System.out.println(header);
152 }
153 System.out.println("asc: " + lm.getAscent());
154 System.out.println("dsc: " + lm.getDescent());
155 System.out.println("ulo: " + lm.getUnderlineOffset());
156 System.out.println("ult: " + lm.getUnderlineThickness());
157 System.out.println("sto: " + lm.getStrikethroughOffset());
158 System.out.println("stt: " + lm.getStrikethroughThickness());
159 }
160 }