1 /* 2 * Copyright (c) 2017, 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 26 @bug 8148619 27 @summary Select the closest resolution variant in BaseMultiResolutionImage 28 @run main/othervm -Dsun.java2d.uiScale=1 MultiResolutionVariantSelectionTest 29 @run main/othervm -Dsun.java2d.uiScale=2 MultiResolutionVariantSelectionTest 30 @run main/othervm -Dsun.java2d.uiScale=3 MultiResolutionVariantSelectionTest 31 @run main/othervm -Dsun.java2d.uiScale=4 MultiResolutionVariantSelectionTest 32 */ 33 34 import java.awt.*; 35 import java.awt.image.*; 36 37 public class MultiResolutionVariantSelectionTest { 38 39 static Color[] colors = {Color.RED, Color.GREEN, Color.BLUE}; 40 static int W = 100, H = 100; 41 42 public static void main(String[] args) throws Exception { 43 Image[] images = new Image[colors.length]; 44 for (int i = colors.length - 1; i >= 0; i--) { 45 images[i] = generateImage(i + 1, colors[i]); 46 } 47 Image mrImage =new BaseMultiResolutionImage(images); 48 49 Frame frame = new Frame(); 50 Panel panel = new Panel() { 51 @Override 52 public void paint(Graphics g) { 53 super.paint(g); 54 g.drawImage(mrImage, 0, 0, W, H, null); 55 } 56 }; 57 panel.setPreferredSize(new Dimension(W, H)); 58 frame.add(panel); 59 frame.pack(); 60 frame.setVisible(true); 61 62 Robot robot = new Robot(); 63 robot.delay(200); 64 robot.waitForIdle(); 65 66 Point p = panel.getLocationOnScreen(); 67 p.translate(W / 2, H / 2); 68 Color color = robot.getPixelColor(p.x, p.y); 69 int expected = Math.min( 70 Integer.parseInt(System.getProperty("sun.java2d.uiScale")), 71 colors.length) - 1; 72 if (!color.equals(colors[expected])) { 73 throw new RuntimeException("Wrong image variant painted " + color); 74 } 75 } 76 77 private static BufferedImage generateImage(int scale, Color c) { 78 BufferedImage image = new BufferedImage( 79 scale * W, scale * H, BufferedImage.TYPE_INT_RGB); 80 Graphics g = image.getGraphics(); 81 g.setColor(c); 82 g.fillRect(0, 0, scale * W + 1, scale * H + 1); 83 g.dispose(); 84 return image; 85 } 86 }