1 /* 2 * Copyright (C) 2019 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 8220231 27 * @summary Cache HarfBuzz face object for same font's text layout calls 28 * @comment Test layout operations for the same font performed simultaneously 29 * from multiple threads 30 */ 31 32 import java.awt.Font; 33 import java.awt.font.FontRenderContext; 34 import java.awt.font.GlyphVector; 35 import java.util.ArrayList; 36 import java.util.List; 37 import java.util.concurrent.CyclicBarrier; 38 import java.util.concurrent.atomic.AtomicReference; 39 40 public class FontLayoutStressTest { 41 private static final int NUMBER_OF_THREADS = 42 Runtime.getRuntime().availableProcessors() * 2; 43 private static final long TIME_TO_RUN_NS = 1_000_000_000; // 1 second 44 private static final Font FONT = new Font(Font.SERIF, Font.PLAIN, 12); 45 private static final FontRenderContext FRC = new FontRenderContext(null, 46 false, false); 47 private static final char[] TEXT = "Lorem ipsum dolor sit amet, ..." 48 .toCharArray(); 49 50 private static double doLayout() { 51 GlyphVector gv = FONT.layoutGlyphVector(FRC, TEXT, 0, TEXT.length, 52 Font.LAYOUT_LEFT_TO_RIGHT); 53 return gv.getGlyphPosition(gv.getNumGlyphs()).getX(); 54 } 55 56 public static void main(String[] args) throws Throwable { 57 double expectedWidth = doLayout(); 58 AtomicReference<Throwable> throwableRef = new AtomicReference<>(); 59 CyclicBarrier barrier = new CyclicBarrier(NUMBER_OF_THREADS); 60 List<Thread> threads = new ArrayList<>(); 61 for (int i = 0; i < NUMBER_OF_THREADS; i++) { 62 Thread thread = new Thread(() -> { 63 try { 64 barrier.await(); 65 long timeToStop = System.nanoTime() + TIME_TO_RUN_NS; 66 while (System.nanoTime() < timeToStop) { 67 double width = doLayout(); 68 if (width != expectedWidth) { 69 throw new RuntimeException( 70 "Unexpected layout result"); 71 } 72 } 73 } catch (Throwable e) { 74 throwableRef.set(e); 75 } 76 }); 77 threads.add(thread); 78 thread.start(); 79 } 80 for (Thread thread : threads) { 81 thread.join(); 82 } 83 Throwable throwable = throwableRef.get(); 84 if (throwable != null) { 85 throw throwable; 86 } 87 } 88 }