1 /*
   2  * Copyright (c) 2009, 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 import java.awt.*;
  24 import java.awt.geom.Ellipse2D;
  25 import java.awt.image.BufferedImage;
  26 import java.io.File;
  27 import javax.imageio.ImageIO;
  28 
  29 /**
  30  * @author chrisn@google.com (Chris Nokleberg)
  31  * @author yamauchi@google.com (Hiroshi Yamauchi)
  32  */
  33 public class ThinLineTest {
  34   private static final int PIXEL = 381;
  35 
  36   public static void main(String[] args) throws Exception {
  37     BufferedImage image = new BufferedImage(200, 200, BufferedImage.TYPE_INT_RGB);
  38     Graphics2D g = image.createGraphics();
  39 
  40     g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
  41     g.setPaint(Color.WHITE);
  42     g.fill(new Rectangle(image.getWidth(), image.getHeight()));
  43 
  44     g.scale(0.5 / PIXEL, 0.5 / PIXEL);
  45     g.setPaint(Color.BLACK);
  46     g.setStroke(new BasicStroke(PIXEL));
  47     g.draw(new Ellipse2D.Double(PIXEL * 50, PIXEL * 50, PIXEL * 300, PIXEL * 300));
  48 
  49     // To visually check it
  50     //ImageIO.write(image, "PNG", new File(args[0]));
  51 
  52     boolean nonWhitePixelFound = false;
  53     for (int x = 0; x < 200; ++x) {
  54       if (image.getRGB(x, 100) != Color.WHITE.getRGB()) {
  55         nonWhitePixelFound = true;
  56         break;
  57       }
  58     }
  59     if (!nonWhitePixelFound) {
  60       throw new RuntimeException("The thin line disappeared.");
  61     }
  62   }
  63 }