| /* |
| * Copyright (C) 2019 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 8220231 |
| * @summary Cache HarfBuzz face object for same font's text layout calls |
| * @comment Test layout operations for the same font performed simultaneously |
| * from multiple threads |
| */ |
| |
| import java.awt.Font; |
| import java.awt.font.FontRenderContext; |
| import java.awt.font.GlyphVector; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.concurrent.CyclicBarrier; |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| public class FontLayoutStressTest { |
| private static final int NUMBER_OF_THREADS = |
| Runtime.getRuntime().availableProcessors() * 2; |
| private static final long TIME_TO_RUN_NS = 1_000_000_000; // 1 second |
| private static final Font FONT = new Font(Font.SERIF, Font.PLAIN, 12); |
| private static final FontRenderContext FRC = new FontRenderContext(null, |
| false, false); |
| private static final char[] TEXT = "Lorem ipsum dolor sit amet, ..." |
| .toCharArray(); |
| |
| private static double doLayout() { |
| GlyphVector gv = FONT.layoutGlyphVector(FRC, TEXT, 0, TEXT.length, |
| Font.LAYOUT_LEFT_TO_RIGHT); |
| return gv.getGlyphPosition(gv.getNumGlyphs()).getX(); |
| } |
| |
| public static void main(String[] args) throws Throwable { |
| double expectedWidth = doLayout(); |
| AtomicReference<Throwable> throwableRef = new AtomicReference<>(); |
| CyclicBarrier barrier = new CyclicBarrier(NUMBER_OF_THREADS); |
| List<Thread> threads = new ArrayList<>(); |
| for (int i = 0; i < NUMBER_OF_THREADS; i++) { |
| Thread thread = new Thread(() -> { |
| try { |
| barrier.await(); |
| long timeToStop = System.nanoTime() + TIME_TO_RUN_NS; |
| while (System.nanoTime() < timeToStop) { |
| double width = doLayout(); |
| if (width != expectedWidth) { |
| throw new RuntimeException( |
| "Unexpected layout result"); |
| } |
| } |
| } catch (Throwable e) { |
| throwableRef.set(e); |
| } |
| }); |
| threads.add(thread); |
| thread.start(); |
| } |
| for (Thread thread : threads) { |
| thread.join(); |
| } |
| Throwable throwable = throwableRef.get(); |
| if (throwable != null) { |
| throw throwable; |
| } |
| } |
| } |