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/*
* Copyright (c) 2002, 2024, 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
* @bug 4725045
* @key headful
* @summary verifies that there are no artifacts due to using
* GDI for copies to the back buffer (GDI should only be used
* for copies to the screen)
* @run main GdiBlitOffscreenTest
*/
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Point;
import java.awt.Robot;
import java.awt.image.BufferedImage;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
public class GdiBlitOffscreenTest {
static volatile JFrame f;
static final int imageW = 100, imageH = 100, FW = 500, FH = 500;
static volatile BufferedImage greenImage;
public static void main(String[] args) throws Exception {
// First, create an image.
greenImage = new BufferedImage(imageW, imageH,
BufferedImage.TYPE_INT_RGB);
Graphics redG = greenImage.getGraphics();
redG.setColor(Color.green);
redG.fillRect(0, 0, imageW, imageH);
redG.setColor(Color.white);
redG.drawString("Passed!", 30, 80);
Robot robot = new Robot();
try {
SwingUtilities.invokeAndWait(GdiBlitOffscreenTest::createUI);
robot.delay(1000);
robot.waitForIdle();
Point p = f.getLocationOnScreen();
Color c = robot.getPixelColor(p.x+FW/2, p.y+FH/2);
if (!c.equals(Color.green)) {
throw new RuntimeException("Color is " + c);
}
} finally {
if (f != null) {
SwingUtilities.invokeAndWait(f::dispose);
}
}
}
private static void createUI() {
f = new JFrame("GdiBlitOffscreenTest");
f.setSize(FW, FH);
f.setVisible(true);
// copy the image to the window.
Graphics g = f.getGraphics();
g.drawImage(greenImage, 0, 0, null);
// Now, get on with the rest of the test
JComponent app = new GdiBlitOffscreenTestComponent(imageW, imageH, greenImage);
app.setSize(500, 500);
f.getContentPane().add(app);
f.validate();
f.repaint();
}
}
class GdiBlitOffscreenTestComponent extends JComponent {
int imageW, imageH;
Image theImage;
public GdiBlitOffscreenTestComponent(int imageW, int imageH,
Image theImage)
{
this.theImage = theImage;
this.imageW = imageW;
this.imageH = imageH;
}
public void paintComponent(Graphics g) {
int imageX = (getWidth() - imageW) / 2;
int imageY = (getHeight() - imageH) / 2;
g.setColor(Color.blue);
g.fillRect(0, 0, getWidth(), getHeight());
g.setColor(Color.red);
g.fillRect(imageX, imageY, imageW, imageH);
g.setColor(Color.white);
g.drawString("Failed!", imageX + 30, imageY + 80);
g.drawImage(theImage, imageX, imageY, null);
}
}
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