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.MultipleGradientPaint.*;
  26 import java.awt.geom.*;
  27 import java.awt.image.*;
  28 
  29 /**
  30  * @test
  31  * @key headful
  32  * @bug 8023483
  33  * @summary tests if the transform-parameter is applied correctly when creating
  34  *          a gradient.
  35  * @author ceisserer
  36  */
  37 public class GradientTransformTest extends Frame {
  38     BufferedImage srcImg;
  39     Image dstImg;
  40 
  41     public GradientTransformTest() {
  42         srcImg = createSrcImage();
  43         dstImg = getGraphicsConfiguration().createCompatibleVolatileImage(20,
  44                 20);
  45     }
  46 
  47     protected void renderToVI(BufferedImage src, Image dst) {
  48         Graphics2D g = (Graphics2D) dst.getGraphics();
  49 
  50         g.setColor(Color.WHITE);
  51         g.fillRect(0, 0, dst.getWidth(null), dst.getHeight(null));
  52 
  53         AffineTransform at = new AffineTransform();
  54         at.translate(-100, 0);
  55 
  56         g.setPaint(new LinearGradientPaint(new Point2D.Float(100, 0),
  57                 new Point2D.Float(120, 0), new float[] { 0.0f, 0.75f, 1.0f },
  58                 new Color[] { Color.red, Color.green, Color.blue },
  59                 CycleMethod.NO_CYCLE, ColorSpaceType.SRGB, at));
  60 
  61         g.fillRect(-10, -10, 30, 30);
  62     }
  63 
  64     public void paint(Graphics g1) {
  65         Graphics2D g = (Graphics2D) g1;
  66         renderToVI(createSrcImage(), dstImg);
  67         g.drawImage(dstImg, 20, 20, null);
  68     }
  69 
  70     public void showFrame() {
  71         setSize(500, 500);
  72         setVisible(true);
  73     }
  74 
  75     public void test() {
  76         renderToVI(createSrcImage(), dstImg);
  77 
  78         BufferedImage validationImg = new BufferedImage(20, 20,
  79                 BufferedImage.TYPE_INT_RGB);
  80         Graphics2D valG = (Graphics2D) validationImg.getGraphics();
  81         valG.drawImage(dstImg, 0, 0, null);
  82 
  83         // Loop over all pixel, and count the different pixel values
  84         // encountered.
  85         boolean gradientTranslated = false;
  86         for (int x = 0; x < validationImg.getWidth() && !gradientTranslated; x++) {
  87             for (int y = 0; y < validationImg.getHeight()
  88                     && !gradientTranslated; y++) {
  89                 int rgb = validationImg.getRGB(x, y);
  90                 if (rgb != -65279) {
  91                     gradientTranslated = true;
  92                 }
  93             }
  94         }
  95 
  96         if (gradientTranslated) {
  97             System.out.println("Passed!");
  98         } else {
  99             throw new RuntimeException("Test FAILED!");
 100         }
 101     }
 102 
 103     protected BufferedImage createSrcImage() {
 104         BufferedImage bi = new BufferedImage(10, 10, BufferedImage.TYPE_INT_RGB);
 105         Graphics2D g = (Graphics2D) bi.getGraphics();
 106         g.setColor(Color.YELLOW);
 107         g.fillRect(0, 0, 10, 10);
 108         g.setColor(Color.black);
 109         g.drawLine(0, 0, 10, 10);
 110         return bi;
 111     }
 112 
 113     public static void main(String[] args) throws Exception {
 114         boolean show = (args.length > 0 && "-show".equals(args[0]));
 115         final GradientTransformTest t = new GradientTransformTest();
 116 
 117         if (show) {
 118             EventQueue.invokeAndWait(new Runnable() {
 119                 public void run() {
 120                     t.showFrame();
 121                 }
 122             });
 123         } else {
 124             t.test();
 125         }
 126     }
 127 }