russell@unturf.com
0a580b313d
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
121 lines
4.2 KiB
Java
121 lines
4.2 KiB
Java
/*
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* Copyright (c) 1999, 2025, Oracle and/or its affiliates. All rights reserved.
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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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import javax.imageio.ImageIO;
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import java.awt.AWTException;
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import java.awt.Color;
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import java.awt.Dimension;
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import java.awt.EventQueue;
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import java.awt.Frame;
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import java.awt.Graphics;
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import java.awt.Insets;
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import java.awt.Label;
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import java.awt.Panel;
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import java.awt.Point;
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import java.awt.Rectangle;
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import java.awt.Robot;
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import java.awt.image.BufferedImage;
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import java.io.File;
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import java.io.IOException;
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import java.lang.reflect.InvocationTargetException;
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/*
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* @test
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* @bug 4191297
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* @summary Tests that unreferenced GDI resources are correctly
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* destroyed when no longer needed.
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* @key headful
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* @run main GDIResourceExhaustionTest
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*/
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public class GDIResourceExhaustionTest extends Frame {
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public void initUI() {
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setSize(200, 200);
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setUndecorated(true);
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setLocationRelativeTo(null);
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Panel labelPanel = new Panel();
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Label label = new Label("Red label");
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label.setBackground(Color.red);
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labelPanel.add(label);
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labelPanel.setLocation(20, 50);
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add(labelPanel);
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setVisible(true);
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}
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public void paint(Graphics graphics) {
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super.paint(graphics);
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for (int rgb = 0; rgb <= 0xfff; rgb++) {
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graphics.setColor(new Color(rgb));
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graphics.fillRect(0, 0, 5, 5);
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}
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}
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public void requestCoordinates(Rectangle r) {
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Insets insets = getInsets();
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Point location = getLocationOnScreen();
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Dimension size = getSize();
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r.x = location.x + insets.left;
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r.y = location.y + insets.top;
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r.width = size.width - (insets.left + insets.right);
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r.height = size.height - (insets.top + insets.bottom);
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}
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public static void main(String[] args) throws InterruptedException,
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InvocationTargetException, AWTException, IOException {
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GDIResourceExhaustionTest test = new GDIResourceExhaustionTest();
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try {
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EventQueue.invokeAndWait(test::initUI);
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Robot robot = new Robot();
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robot.delay(2000);
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Rectangle coords = new Rectangle();
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EventQueue.invokeAndWait(() -> {
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test.requestCoordinates(coords);
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});
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robot.mouseMove(coords.x - 50, coords.y - 50);
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robot.waitForIdle();
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robot.delay(5000);
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BufferedImage capture = robot.createScreenCapture(coords);
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robot.delay(500);
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boolean redFound = false;
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int redRGB = Color.red.getRGB();
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for (int y = 0; y < capture.getHeight(); y++) {
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for (int x = 0; x < capture.getWidth(); x++) {
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if (capture.getRGB(x, y) == redRGB) {
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redFound = true;
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break;
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}
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if (redFound) {
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break;
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}
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}
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}
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if (!redFound) {
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File errorImage = new File("screenshot.png");
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ImageIO.write(capture, "png", errorImage);
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throw new RuntimeException("Red label is not detected, possibly GDI resources exhausted");
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}
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} finally {
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EventQueue.invokeAndWait(test::dispose);
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}
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}
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}
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