1/* 2 * Copyright 2017 JetBrains s.r.o. 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 8174744 27 * @summary Wrong rendering of string containing surrogate pairs on macOS 28 */ 29 30import java.awt.Color; 31import java.awt.Font; 32import java.awt.FontMetrics; 33import java.awt.Graphics; 34import java.awt.image.BufferedImage; 35 36public class SuppCharDrawTest { 37 private static final Font FONT = new Font(Font.MONOSPACED, Font.PLAIN, 12); 38 private static final int IMAGE_WIDTH = 20; 39 private static final int IMAGE_HEIGHT = 20; 40 41 42 public static void main(String[] args) { 43 BufferedImage base = renderFirstChar("A"); 44 BufferedImage basePlusSurrogate = renderFirstChar("A \uD835\uDC00"); 45 46 if (!imagesAreEqual(base, basePlusSurrogate)) { 47 throw new RuntimeException("Unexpected rendering change"); 48 } 49 } 50 51 private static BufferedImage renderFirstChar(String s) { 52 BufferedImage image = new BufferedImage(IMAGE_WIDTH, IMAGE_HEIGHT, BufferedImage.TYPE_INT_RGB); 53 Graphics g = image.createGraphics(); 54 g.setColor(Color.white); 55 g.fillRect(0, 0, IMAGE_WIDTH, IMAGE_HEIGHT); 56 g.setColor(Color.black); 57 g.setFont(FONT); 58 FontMetrics metrics = g.getFontMetrics(); 59 g.clipRect(0, 0, metrics.charWidth(s.charAt(0)), IMAGE_HEIGHT); 60 g.drawString(s, 0, metrics.getAscent()); 61 g.dispose(); 62 return image; 63 } 64 65 private static boolean imagesAreEqual(BufferedImage i1, BufferedImage i2) { 66 if (i1.getWidth() != i2.getWidth() || i1.getHeight() != i2.getHeight()) return false; 67 for (int i = 0; i < i1.getWidth(); i++) { 68 for (int j = 0; j < i1.getHeight(); j++) { 69 if (i1.getRGB(i, j) != i2.getRGB(i, j)) { 70 return false; 71 } 72 } 73 } 74 return true; 75 } 76} 77