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