1 /*
   2  * Copyright (c) 2011, 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 
  24 /**
  25  * @test
  26  * @bug     7019861
  27  *
  28  * @summary Verifies that the last scanline isn't skipped when doing
  29  *          antialiased rendering.
  30  *
  31  * @run     main Test7019861
  32  */
  33 
  34 import java.awt.BasicStroke;
  35 import java.awt.Color;
  36 import java.awt.Graphics2D;
  37 import java.awt.geom.Path2D;
  38 import java.awt.image.BufferedImage;
  39 import java.util.Arrays;
  40 
  41 import static java.awt.RenderingHints.*;
  42 
  43 public class Test7019861 {
  44 
  45     public static void main(String[] argv) throws Exception {
  46         BufferedImage im = getWhiteImage(30, 30);
  47         Graphics2D g2 = (Graphics2D)im.getGraphics();
  48         g2.setRenderingHint(KEY_ANTIALIASING, VALUE_ANTIALIAS_ON);
  49         g2.setRenderingHint(KEY_STROKE_CONTROL, VALUE_STROKE_PURE);
  50         g2.setStroke(new BasicStroke(10, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL));
  51         g2.setBackground(Color.white);
  52         g2.setColor(Color.black);
  53 
  54         Path2D p = getPath(0, 0, 20);
  55         g2.draw(p);
  56 
  57         if (!(new Color(im.getRGB(20, 19))).equals(Color.black)) {
  58             throw new Exception("This pixel should be black");
  59         }
  60     }
  61 
  62     private static Path2D getPath(int x, int y, int len) {
  63         Path2D p = new Path2D.Double();
  64         p.moveTo(x, y);
  65         p.quadTo(x + len, y, x + len, y + len);
  66         return p;
  67     }
  68 
  69     private static BufferedImage getWhiteImage(int w, int h) {
  70         BufferedImage ret = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
  71         final int[] white = new int[w * h];
  72         Arrays.fill(white, 0xffffff);
  73         ret.setRGB(0, 0, w, h, white, 0, w);
  74         return ret;
  75     }
  76 }