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
26 @bug 7017058 8191130 8195836
27 @summary Test handling of ZWJ by layout.
28 */
29
30 /*
31 * A forced mapping of ZWJ (u+200D) to a special invisible glyph ID
32 * was breaking many uses of ZWJ to form ligatures in fonts supporting
33 * Indic scripts (Malayalam, Bengali, Sinhala at least) and also Emoji.
34 * Without knowing the exact properties of a font under test, and also
35 * how a layout engine maps chars to glyphs, it is difficult to write
36 * a complete robust automated test.
37 * So whilst it tries to show rendering for any fonts that claims to
38 * support the target alphabet, it will fail only when specific known
39 * fonts fail.
40 * The test automatically passes or fails only if these fonts do
41 * not ligature away the ZWJ.
42 * Besides this the test renders the specific text from these fonts
43 * and any others that claim to fully support the text, so it can be
44 * manually examined if so desired.
45 */
46
47 import java.awt.Font;
48 import java.awt.Graphics2D;
49 import java.awt.font.FontRenderContext;
50 import java.awt.font.GlyphVector;
51 import java.awt.geom.Point2D;
52 import java.awt.image.BufferedImage;
53 import java.util.Locale;
54
55 public class ZWJLigatureTest {
56
57 // These are fonts and scripts on Windows that should support
58 // the behaviours enough to make reliable tests";
59
60 static final String malayalamName = "Malayalam";
61 static final String malayalamFont = "Kartika";
62 static final String malayalamText = "\u0D2C\u0D3E\u0D32\u0D28\u0D4D\u200D";
63
64 static final String bengaliName = "Bengali";
65 static final String bengaliFont = "Vrinda";
66 static final String bengaliText =
67 "\u09CE \u09A4\u09CD\u200D " +
68 "\u09A4\u09BE\u09CE \u09A4\u09BE\u09A4\u09CD\u200D";
69
70 static final String sinhalaName = "Sinhala";
71 static final String sinhalaFont = "Iskoola Pota";
72 static final String sinhalaText =
73 "\u0DC1\u0DCA\u200D\u0DBB\u0DD3" +
74 "\u0D9A\u0DCA\u200D\u0DBB\u0DD2" +
75 "\u0D9A\u0DCA\u200D\u0DBB\u0DD3" +
76 "\u0DA7\u0DCA\u200D\u0DBB\u0DDA" +
77 "\u0DB6\u0DCA\u200D\u0DBB\u0DD0" +
78 "\u0D9B\u0DCA\u200D\u0DBA\u0DCF";
79
80
81 static String[] scripts = { malayalamName, bengaliName, sinhalaName };
82 static String[] fontNames = { malayalamFont, bengaliFont, sinhalaFont };
83 static String[] text = { malayalamText, bengaliText, sinhalaText };
84
85
86 static void doTest() {
87 boolean testFailed = false;
88
89 BufferedImage bi = new BufferedImage(50, 50, BufferedImage.TYPE_INT_RGB);
90 Graphics2D g2d = (Graphics2D)bi.getGraphics();
91 FontRenderContext frc = g2d.getFontRenderContext();
92 for (int f=0; f < fontNames.length; f++) {
93 Font font = new Font(fontNames[f], Font.PLAIN, 30);
94 String family = font.getFamily(Locale.ENGLISH).toLowerCase();
95 if (!fontNames[f].toLowerCase().equals(family)) {
96 System.out.println(fontNames[f] + " not found, skipping.");
97 continue;
98 } else {
99 System.out.println("Testing " + fontNames[f] +
100 " for " + scripts[f]);
101 }
102 char[] chs = text[f].toCharArray();
103 GlyphVector gv = font.layoutGlyphVector(frc, chs, 0, chs.length, 0);
104 for (int g=0; g<gv.getNumGlyphs(); g++) {
105 int glyph = gv.getGlyphCode(g);
106 int charIdx = gv.getGlyphCharIndex(g);
107 int codePoint = text[f].codePointAt(charIdx);
108 Point2D pos = gv.getGlyphPosition(g);
109
110 if (codePoint == 0x200D) {
111 testFailed = true;
112 System.out.println("FAIL: GOT ZWJ\n");
113 }
114 System.out.println("["+g+"]: gid="+Integer.toHexString(glyph)
115 +", charIdx="+Integer.toHexString(charIdx)
116 +", codePoint="+Integer.toHexString(codePoint)
117 +", pos=["+pos.getX()+","+pos.getY()+"]");
118 }
119 }
120 if (testFailed) {
121 throw new RuntimeException("TEST FAILED");
122 }
123 }
124
125 public static void main(String[] args) {
126 doTest();
127 }
128 }