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 }