89 lines
3.4 KiB
Java
89 lines
3.4 KiB
Java
/*
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* Copyright (C) 2019 JetBrains s.r.o.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8220231
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* @summary Cache HarfBuzz face object for same font's text layout calls
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* @comment Test layout operations for the same font performed simultaneously
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* from multiple threads
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*/
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import java.awt.Font;
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import java.awt.font.FontRenderContext;
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import java.awt.font.GlyphVector;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.concurrent.CyclicBarrier;
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import java.util.concurrent.atomic.AtomicReference;
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public class FontLayoutStressTest {
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private static final int NUMBER_OF_THREADS =
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Runtime.getRuntime().availableProcessors() * 2;
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private static final long TIME_TO_RUN_NS = 1_000_000_000; // 1 second
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private static final Font FONT = new Font(Font.SERIF, Font.PLAIN, 12);
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private static final FontRenderContext FRC = new FontRenderContext(null,
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false, false);
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private static final char[] TEXT = "Lorem ipsum dolor sit amet, ..."
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.toCharArray();
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private static double doLayout() {
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GlyphVector gv = FONT.layoutGlyphVector(FRC, TEXT, 0, TEXT.length,
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Font.LAYOUT_LEFT_TO_RIGHT);
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return gv.getGlyphPosition(gv.getNumGlyphs()).getX();
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}
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public static void main(String[] args) throws Throwable {
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double expectedWidth = doLayout();
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AtomicReference<Throwable> throwableRef = new AtomicReference<>();
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CyclicBarrier barrier = new CyclicBarrier(NUMBER_OF_THREADS);
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List<Thread> threads = new ArrayList<>();
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for (int i = 0; i < NUMBER_OF_THREADS; i++) {
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Thread thread = new Thread(() -> {
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try {
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barrier.await();
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long timeToStop = System.nanoTime() + TIME_TO_RUN_NS;
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while (System.nanoTime() < timeToStop) {
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double width = doLayout();
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if (width != expectedWidth) {
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throw new RuntimeException(
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"Unexpected layout result");
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}
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}
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} catch (Throwable e) {
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throwableRef.set(e);
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}
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});
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threads.add(thread);
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thread.start();
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}
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for (Thread thread : threads) {
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thread.join();
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}
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Throwable throwable = throwableRef.get();
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if (throwable != null) {
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throw throwable;
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}
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}
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}
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