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/*
* Copyright (c) 2006, 2016, 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
* @key headful
* @bug 6216010
* @summary check to see that underline thickness scales.
* @run main UnderlineTest
*/
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridLayout;
import java.awt.font.FontRenderContext;
import java.awt.font.LineMetrics;
import java.awt.font.TextAttribute;
import java.awt.font.TextLayout;
import java.awt.geom.AffineTransform;
import java.util.HashMap;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
public class UnderlineTest {
static class FontsPanel extends Container {
FontsPanel(Font[] fonts) {
setLayout(new GridLayout(0, 1));
for (int i = 0; i < fonts.length; ++i) {
add(new FontPanel(fonts[i]));
}
}
}
static String fps = "Stellar glyphs";
static Dimension fpd = new Dimension(600, 120);
static class FontPanel extends JComponent {
Font f;
FontPanel(Font f) {
this.f = f;
setPreferredSize(fpd);
setMinimumSize(fpd);
setMaximumSize(fpd);
setSize(fpd);
}
public void paintComponent(Graphics g) {
g.setColor(Color.WHITE);
g.fillRect(0, 0, fpd.width, fpd.height);
g.setColor(Color.RED);
FontRenderContext frc = ((Graphics2D)g).getFontRenderContext();
LineMetrics lm = f.getLineMetrics(fps, frc);
int h = (int)(fpd.height - 20 - lm.getAscent());
g.drawLine(20, h, fpd.width - 20, h);
h = fpd.height - 20;
g.drawLine(20, h, fpd.width - 20, h);
h = (int)(fpd.height - 20 + lm.getDescent());
g.drawLine(20, h, fpd.width - 20, h);
g.setColor(Color.BLACK);
g.setFont(f);
g.drawString(fps, 50, fpd.height - 20);
}
}
public static void main(String args[]) {
String fontName = Font.DIALOG;
if (args.length > 0) {
fontName = args[0];
}
FontRenderContext frc = new FontRenderContext(null, false, false);
FontRenderContext frc2 = new FontRenderContext(AffineTransform.getScaleInstance(1.5, 1.5), false, false);
Font font0 = new Font(fontName, 0, 20);
HashMap map = new HashMap();
map.put(TextAttribute.UNDERLINE, TextAttribute.UNDERLINE_ON);
map.put(TextAttribute.STRIKETHROUGH, TextAttribute.STRIKETHROUGH_ON);
Font font = font0.deriveFont(map);
System.out.println("Using font: " + font);
double rot = -Math.PI/4;
AffineTransform scrtx = AffineTransform.getRotateInstance(rot);
scrtx.scale(1, 2);
Font[] fonts = {
font.deriveFont(1f),
font.deriveFont(20f),
font.deriveFont(40f),
font.deriveFont(80f),
font.deriveFont(AffineTransform.getRotateInstance(rot)),
font.deriveFont(AffineTransform.getScaleInstance(1, 2)),
font.deriveFont(AffineTransform.getScaleInstance(2, 4)),
font.deriveFont(scrtx),
};
LineMetrics[] metrics = new LineMetrics[fonts.length * 2];
for (int i = 0; i < metrics.length; ++i) {
Font f = fonts[i % fonts.length];
FontRenderContext frcx = i < fonts.length ? frc : frc2;
metrics[i] = f.getLineMetrics("X", frcx);
// dumpMetrics("Metrics for " + f.getSize2D() + " pt. font,\n tx: " +
// f.getTransform() + ",\n frctx: " + frcx.getTransform(), metrics[i]);
}
// test for linear scale
// this seems to work, might need to get fancy to deal with last-significant-bit issues?
double ds1 = metrics[2].getStrikethroughOffset() - metrics[1].getStrikethroughOffset();
double du1 = metrics[2].getUnderlineThickness() - metrics[1].getUnderlineThickness();
double ds2 = metrics[3].getStrikethroughOffset() - metrics[2].getStrikethroughOffset();
double du2 = metrics[3].getUnderlineThickness() - metrics[2].getUnderlineThickness();
if (ds2 != ds1 * 2 || du2 != du1 * 2) {
throw new IllegalStateException("non-linear scale: " + ds1 + " / " + ds2 + ", " +
du1 + " / " + du2);
}
JFrame jf = new JFrame("Fonts");
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf.add(new JScrollPane(new FontsPanel(fonts)));
jf.pack();
jf.setVisible(true);
}
static void dumpMetrics(String header, LineMetrics lm) {
if (header != null) {
System.out.println(header);
}
System.out.println("asc: " + lm.getAscent());
System.out.println("dsc: " + lm.getDescent());
System.out.println("ulo: " + lm.getUnderlineOffset());
System.out.println("ult: " + lm.getUnderlineThickness());
System.out.println("sto: " + lm.getStrikethroughOffset());
System.out.println("stt: " + lm.getStrikethroughThickness());
}
}
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