7017637: closed/java/awt/font/StyledMetrics/BoldSpace.java failed : Space char...

7017637: closed/java/awt/font/StyledMetrics/BoldSpace.java failed : Space char should have 0 advance
Reviewed-by: igor, jgodinez

test/java/awt/font/StyledMetrics/BoldSpace.java

+/*
+ * Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+  @test
+  @bug 6686365 7017637
+  @summary Confirm that styling does not affect metrics of zero advance glyphs
+*/
+
+import java.awt.*;
+import java.awt.image.*;
+
+public class BoldSpace {
+    public static void main(String[] s) {
+        BufferedImage bi = new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB);
+
+        String errMsg = "ZWJ Space char should have 0 advance\n";
+
+        Graphics g = bi.getGraphics();
+
+        // It turns out that some fonts inexplicably treat this as
+        // a standard character. In this 14 pt font, if we see an advance
+        // that's clearly bigger than we'd have introduced in bolding we'll
+        // not error out this test, presuming that its a consequence of
+        // the actual font data. A Linux font 'TLwg Type Bold' is the case
+        // in point.
+        int errorMargin = 4;
+        g.setFont(new Font("monospaced", Font.BOLD, 14));
+        //g.setFont(new Font("Lucida Sans Regular", Font.BOLD, 14));
+        FontMetrics fm = g.getFontMetrics();
+        System.out.println("Bold: " + fm.charWidth('\u200b'));
+        int cwid = fm.charWidth('\u200b');
+        if (cwid > 0 && cwid < errorMargin) {
+            throw new RuntimeException(errMsg);
+        }
+
+        ((Graphics2D)g).setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
+                                 RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_HRGB);
+        fm = g.getFontMetrics();
+        System.out.println("Bold + LCD: "+fm.charWidth('\u200b'));
+        cwid = fm.charWidth('\u200b');
+        if (cwid > 0 && cwid < errorMargin) {
+            throw new RuntimeException(errMsg);
+        }
+
+
+        ((Graphics2D)g).setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS,
+                                 RenderingHints.VALUE_FRACTIONALMETRICS_ON);
+        ((Graphics2D)g).setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
+                                 RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
+        fm = g.getFontMetrics();
+        System.out.println("Bold FM OFF + AA: " + fm.charWidth('\u200b'));
+        cwid = fm.charWidth('\u200b');
+        if (cwid > 0 && cwid < errorMargin) {
+            throw new RuntimeException(errMsg);
+        }
+
+        ((Graphics2D)g).setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS,
+                                 RenderingHints.VALUE_FRACTIONALMETRICS_OFF);
+        ((Graphics2D)g).setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
+                                 RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
+        fm = g.getFontMetrics();
+        System.out.println("Bold FM ON + AA: " + fm.charWidth('\u200b'));
+        cwid = fm.charWidth('\u200b');
+        if (cwid > 0 && cwid < errorMargin) {
+            throw new RuntimeException(errMsg);
+        }
+
+        ((Graphics2D)g).setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS,
+                                 RenderingHints.VALUE_FRACTIONALMETRICS_ON);
+        ((Graphics2D)g).setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
+                                 RenderingHints.VALUE_TEXT_ANTIALIAS_OFF);
+        fm = g.getFontMetrics();
+        System.out.println("Bold FM ON + nonAA: " + fm.charWidth('\u200b'));
+        cwid = fm.charWidth('\u200b');
+        if (cwid > 0 && cwid < errorMargin) {
+            throw new RuntimeException(errMsg);
+        }
+
+        System.out.println("All printed values should be 0 to PASS");
+    }
+}