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/*
* Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
* 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.
*/
import java.awt.Canvas;
import java.awt.EventQueue;
import java.awt.Frame;
import java.awt.image.BufferStrategy;
import java.util.List;
import javax.swing.JFrame;
/**
* @test
* @bug 6933331
* @key headful
* @summary Tests that BufferStrategy works after the peer is recreated
*/
public final class ExceptionAfterComponentDispose {
public static void main(final String[] args) throws Exception {
// Will check Canvas on the main thread
for (int size = -3; size < 3; ++size) {
for (int numBuffers = 1; numBuffers < 3; ++numBuffers) {
testCanvas(size, numBuffers);
}
}
// Will check JFrame on EDT
EventQueue.invokeAndWait(() -> {
for (int size = -3; size < 3; ++size) {
for (int numBuffers = 1; numBuffers < 3; ++numBuffers) {
testJFrame(size, numBuffers);
}
}
});
}
private static void testCanvas(final int size, final int numBuffers) {
final Frame frame = new Frame();
try {
final Canvas canvas = new Canvas();
frame.setLayout(null); // we would like to control the size
frame.add(canvas);
frame.pack(); // creates a peer
canvas.setSize(size, size);
// BufferStrategy works when the peer just created
canvas.createBufferStrategy(numBuffers);
final BufferStrategy bs = canvas.getBufferStrategy();
if (bs.getDrawGraphics() == null) {
throw new RuntimeException("DrawGraphics is null");
}
// BufferStrategy should work when the peer is recreated
frame.dispose();
frame.pack();
if (canvas.getBufferStrategy() != bs) {
throw new RuntimeException("BS was changed");
}
if (bs.getDrawGraphics() == null) {
throw new RuntimeException("DrawGraphics is null");
}
} finally {
frame.dispose();
}
}
private static void testJFrame(final int size, final int numBuffers) {
for (final boolean undecorated : List.of(true, false)) {
final JFrame frame = new JFrame();
try {
frame.setUndecorated(undecorated);
frame.pack(); // creates a peer
frame.setSize(size, size);
// BufferStrategy works when the peer just created
frame.createBufferStrategy(numBuffers);
final BufferStrategy bs = frame.getBufferStrategy();
if (bs.getDrawGraphics() == null) {
throw new RuntimeException("DrawGraphics is null");
}
// BufferStrategy should work when the peer is recreated
frame.dispose();
frame.pack();
if (frame.getBufferStrategy() != bs) {
throw new RuntimeException("BS was changed");
}
if (bs.getDrawGraphics() == null) {
throw new RuntimeException("DrawGraphics is null");
}
} finally {
frame.dispose();
}
}
}
}
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