| /* |
| * Copyright 2017 JetBrains s.r.o. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 8174744 |
| * @summary Wrong rendering of string containing surrogate pairs on macOS |
| */ |
| |
| import java.awt.Color; |
| import java.awt.Font; |
| import java.awt.FontMetrics; |
| import java.awt.Graphics; |
| import java.awt.image.BufferedImage; |
| |
| public class SuppCharDrawTest { |
| private static final Font FONT = new Font(Font.MONOSPACED, Font.PLAIN, 12); |
| private static final int IMAGE_WIDTH = 20; |
| private static final int IMAGE_HEIGHT = 20; |
| |
| |
| public static void main(String[] args) { |
| BufferedImage base = renderFirstChar("A"); |
| BufferedImage basePlusSurrogate = renderFirstChar("A \uD835\uDC00"); |
| |
| if (!imagesAreEqual(base, basePlusSurrogate)) { |
| throw new RuntimeException("Unexpected rendering change"); |
| } |
| } |
| |
| private static BufferedImage renderFirstChar(String s) { |
| BufferedImage image = new BufferedImage(IMAGE_WIDTH, IMAGE_HEIGHT, BufferedImage.TYPE_INT_RGB); |
| Graphics g = image.createGraphics(); |
| g.setColor(Color.white); |
| g.fillRect(0, 0, IMAGE_WIDTH, IMAGE_HEIGHT); |
| g.setColor(Color.black); |
| g.setFont(FONT); |
| FontMetrics metrics = g.getFontMetrics(); |
| g.clipRect(0, 0, metrics.charWidth(s.charAt(0)), IMAGE_HEIGHT); |
| g.drawString(s, 0, metrics.getAscent()); |
| g.dispose(); |
| return image; |
| } |
| |
| private static boolean imagesAreEqual(BufferedImage i1, BufferedImage i2) { |
| if (i1.getWidth() != i2.getWidth() || i1.getHeight() != i2.getHeight()) return false; |
| for (int i = 0; i < i1.getWidth(); i++) { |
| for (int j = 0; j < i1.getHeight(); j++) { |
| if (i1.getRGB(i, j) != i2.getRGB(i, j)) { |
| return false; |
| } |
| } |
| } |
| return true; |
| } |
| } |