| 1 | /*
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| 2 | * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.
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| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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| 4 | *
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| 5 | * This code is free software; you can redistribute it and/or modify it
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| 6 | * under the terms of the GNU General Public License version 2 only, as
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| 7 | * published by the Free Software Foundation.
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| 8 | *
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| 9 | * This code is distributed in the hope that it will be useful, but WITHOUT
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| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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| 12 | * version 2 for more details (a copy is included in the LICENSE file that
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| 13 | * accompanied this code).
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| 14 | *
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| 15 | * You should have received a copy of the GNU General Public License version
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| 16 | * 2 along with this work; if not, write to the Free Software Foundation,
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| 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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| 18 | *
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| 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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| 20 | * or visit www.oracle.com if you need additional information or have any
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| 21 | * questions.
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| 22 | */
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| 23 | import java.awt.*;
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| 24 | import java.awt.geom.Ellipse2D;
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| 25 | import java.awt.image.BufferedImage;
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| 26 | import java.io.File;
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| 27 | import javax.imageio.ImageIO;
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| 28 |
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| 29 | /**
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| 30 | * @author chrisn@google.com (Chris Nokleberg)
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| 31 | * @author yamauchi@google.com (Hiroshi Yamauchi)
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| 32 | */
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| 33 | public class ThinLineTest {
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| 34 | private static final int PIXEL = 381;
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| 35 |
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| 36 | public static void main(String[] args) throws Exception {
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| 37 | BufferedImage image = new BufferedImage(200, 200, BufferedImage.TYPE_INT_RGB);
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| 38 | Graphics2D g = image.createGraphics();
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| 39 |
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| 40 | g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
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| 41 | g.setPaint(Color.WHITE);
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| 42 | g.fill(new Rectangle(image.getWidth(), image.getHeight()));
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| 43 |
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| 44 | g.scale(0.5 / PIXEL, 0.5 / PIXEL);
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| 45 | g.setPaint(Color.BLACK);
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| 46 | g.setStroke(new BasicStroke(PIXEL));
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| 47 | g.draw(new Ellipse2D.Double(PIXEL * 50, PIXEL * 50, PIXEL * 300, PIXEL * 300));
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| 48 |
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| 49 | // To visually check it
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| 50 | //ImageIO.write(image, "PNG", new File(args[0]));
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| 51 |
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| 52 | boolean nonWhitePixelFound = false;
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| 53 | for (int x = 0; x < 200; ++x) {
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| 54 | if (image.getRGB(x, 100) != Color.WHITE.getRGB()) {
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| 55 | nonWhitePixelFound = true;
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| 56 | break;
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| 57 | }
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| 58 | }
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| 59 | if (!nonWhitePixelFound) {
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| 60 | throw new RuntimeException("The thin line disappeared.");
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| 61 | }
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| 62 | }
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| 63 | }
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