1 /*
   2  * Copyright (c) 2013, 2016, 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 import java.awt.*;
  25 import java.awt.image.*;
  26 import java.util.*;
  27 import javax.swing.*;
  28 
  29 /**
  30  * @test
  31  * @key headful
  32  * @bug 8024895
  33  * @summary tests if changing extra alpha values are honored for transformed blits
  34  * @author ceisserer
  35  */
  36 public class EABlitTest extends Frame {
  37     protected void test() {
  38         BufferedImage srcImg = createSrcImage();
  39         Image dstImg = getGraphicsConfiguration().createCompatibleVolatileImage(20, 50);
  40 
  41         //be over-cautious and render twice to avoid BI caching issues
  42         renderToVI(srcImg, dstImg);
  43         renderToVI(srcImg, dstImg);
  44 
  45         BufferedImage validationImg = new BufferedImage(20, 50, BufferedImage.TYPE_INT_RGB);
  46         Graphics2D valG = (Graphics2D) validationImg.getGraphics();
  47         valG.drawImage(dstImg, 0, 0, null);
  48 
  49         //Loop over all pixel, and count the different pixel values encountered.
  50         TreeSet<Integer> colorCntSet = new TreeSet<>();
  51         for (int x=0; x < validationImg.getWidth(); x++) {
  52             for (int y=0; y < validationImg.getHeight(); y++) {
  53                 int rgb = validationImg.getRGB(x, y);
  54                 colorCntSet.add(rgb);
  55             }
  56         }
  57 
  58         //Check if we encountered 3 different color values in total
  59         if (colorCntSet.size() == 3) {
  60             System.out.println("Passed!");
  61         } else {
  62             throw new RuntimeException("Test FAILED!");
  63         }
  64     }
  65 
  66     protected void renderToVI(BufferedImage src, Image dst) {
  67         Graphics2D g = (Graphics2D) dst.getGraphics();
  68 
  69         g.setColor(Color.WHITE);
  70         g.fillRect(0, 0, 50, 50);
  71         g.rotate(0.5f);
  72         g.setRenderingHint(RenderingHints.KEY_RENDERING,
  73                            RenderingHints.VALUE_RENDER_QUALITY);
  74 
  75         g.setComposite(AlphaComposite.SrcOver.derive(1f));
  76         g.drawImage(src, 10, 10, null);
  77 
  78         g.setComposite(AlphaComposite.SrcOver.derive(0.5f));
  79         g.drawImage(src, 20, 20, null);
  80     }
  81 
  82     protected BufferedImage createSrcImage() {
  83         BufferedImage bi = new BufferedImage(10, 10, BufferedImage.TYPE_INT_RGB);
  84         Graphics2D g = (Graphics2D) bi.getGraphics();
  85         g.setColor(Color.YELLOW);
  86         g.fillRect(0, 0, 10, 10);
  87         return bi;
  88     }
  89 
  90     public static void main(String[] args) {
  91          new EABlitTest().test();
  92     }
  93 }