Quelle CopyAreaOOB.java Sprache: JAVA

/*
* Copyright (c) 2015, 2021, 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.
*/

/*
* @test
* @key headful
* @bug 6430601 8198613
* @summary Verifies that copyArea() works properly when the
* destination parameters are outside the destination bounds.
* @run main/othervm CopyAreaOOB
* @author campbelc
*/

import java.awt.*;
import java.awt.image.*;

public class CopyAreaOOB extends Canvas {

    private static Robot robot = null;

    public void paint(Graphics g) {
        int w = getWidth();
        int h = getHeight();

        Graphics2D g2d = (Graphics2D)g;
        g2d.setColor(Color.black);
        g2d.fillRect(0, 0, w, h);

        g2d.setColor(Color.green);
        g2d.fillRect(0, 0, w, 10);

        g2d.setColor(Color.red);
        g2d.fillRect(0, 10, 50, h-10);

        // copy the region such that part of it goes below the bottom of the
        // destination surface
        g2d.copyArea(0, 10, 50, h-10, 60, 10);

        Toolkit.getDefaultToolkit().sync();

        BufferedImage capture = null;
        try {
            Thread.sleep(500);
            if (robot == null) robot = new Robot();
            Point pt1 = getLocationOnScreen();
            Rectangle rect = new Rectangle(pt1.x, pt1.y, 400, 400);
            capture = robot.createScreenCapture(rect);
        } catch (Exception e) {
            throw new RuntimeException("Problems handling Robot");
        }
        // Test pixels
        testRegion(capture, "green",          0,   0, 400,  10, 0xff00ff00);
        testRegion(capture, "original red",   0,  10,  50, 400, 0xffff0000);
        testRegion(capture, "background",    50,  10,  60, 400, 0xff000000);
        testRegion(capture, "in-between",    60,  10, 110,  20, 0xff000000);
        testRegion(capture, "copied red",    60,  20, 110, 400, 0xffff0000);
        testRegion(capture, "background",   110,  10, 400, 400, 0xff000000);
    }

    public Dimension getPreferredSize() {
        return new Dimension(400, 400);
    }

    private static void testRegion(BufferedImage bi, String name,
                                   int x1, int y1, int x2, int y2,
                                   int expected)
    {
        for (int y = y1; y < y2; y++) {
            for (int x = x1; x < x2; x++) {
                int actual = bi.getRGB(x, y);
                if (actual != expected) {
                    throw new RuntimeException("Test failed for " + name +
                                                       " region at x="+x+" y="+y+
                                                       " (expected="+
                                                       Integer.toHexString(expected) +
                                                       " actual="+
                                                       Integer.toHexString(actual) +
                                                       ")");
                }
            }
        }
    }

    public static void main(String[] args) {
        boolean show = (args.length == 1) && ("-show".equals(args[0]));

        CopyAreaOOB test = new CopyAreaOOB();
        Frame frame = new Frame();
        frame.setUndecorated(true);
        frame.add(test);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);

        try {
            Thread.sleep(3000);
        } catch (InterruptedException ex) {}
        if (!show) {
            frame.dispose();
        }
    }
}

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