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 %W% %E%
  26  * @bug 7016495
  27  * @summary Test tiny scales of BufferedImage
  28  */
  29 
  30 import java.awt.*;
  31 import java.awt.geom.*;
  32 import java.awt.image.*;
  33 
  34 public class TinyScale {
  35     static double tinyscales[] = {
  36         1E-0,
  37         1E-1,
  38         1E-2,
  39         1E-3,
  40         1E-4,
  41         1E-5,
  42         1E-6,
  43         1E-7,
  44         1E-8,
  45         1E-9,
  46         1E-10,
  47         1E-11,
  48         1E-12,
  49         1E-13,
  50         1E-14,
  51         1E-15,
  52         1E-16,
  53         1E-17,
  54         1E-18,
  55         1E-19,
  56         1E-20,
  57         1E-21,
  58         1E-22,
  59         1E-23,
  60         1E-24,
  61         1E-25,
  62         1E-26,
  63         1E-27,
  64         1E-28,
  65         1E-29,
  66     };
  67 
  68     static void test(BufferedImage rendImg, BufferedImage drawImg, double s) {
  69         Graphics2D g = drawImg.createGraphics();
  70         g.transform(new AffineTransform(s, 0.0, -1.0, 1.0, 0.0, 0.0));
  71         g.drawImage(rendImg,
  72                     -rendImg.getWidth() / 2,
  73                     -rendImg.getHeight() / 2,
  74                     null);
  75         g.drawImage(rendImg, 0, 0, null);
  76         g.dispose();
  77     }
  78 
  79     public static void main(String[] args) {
  80         BufferedImage rendImg =
  81             new BufferedImage(100, 100, BufferedImage.TYPE_3BYTE_BGR);
  82         BufferedImage drawImg =
  83             new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB);
  84         for (double s: tinyscales) {
  85             test(rendImg, drawImg, s);
  86             for (int i = 0; args.length > 0 && i < 10; i++) {
  87                 test(rendImg, drawImg, Math.random()*s);
  88             }
  89         }
  90     }
  91 }