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