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/*
* Copyright (c) 2009, 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 6683775 6794764 8186617
* @summary Painting artifacts is seen when panel is made setOpaque(false) for a
* translucent window
*/
import java.awt.Color;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Window;
import java.awt.image.BufferedImage;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
public class bug6683775 {
static final int LOC = 100,
SIZE = 200;
static JFrame testFrame;
static JFrame backgroundFrame;
static BufferedImage capture;
public static void main(String[] args) throws Exception {
GraphicsConfiguration gc = getGC();
if (gc == null || !gc.getDevice().isWindowTranslucencySupported(
GraphicsDevice.WindowTranslucency.PERPIXEL_TRANSLUCENT)) {
return;
}
Robot robot = new Robot();
try {
SwingUtilities.invokeAndWait(() -> {
testFrame = new JFrame(gc);
backgroundFrame = new JFrame("Background frame");
backgroundFrame.setUndecorated(true);
JPanel panel = new JPanel();
panel.setBackground(Color.RED);
backgroundFrame.add(panel);
backgroundFrame.setBounds(LOC, LOC, SIZE, SIZE);
backgroundFrame.setVisible(true);
testFrame.setUndecorated(true);
JPanel p = new JPanel();
p.setOpaque(false);
testFrame.add(p);
setOpaque(testFrame, false);
testFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
testFrame.setBounds(LOC, LOC, SIZE, SIZE);
testFrame.setVisible(true);
});
robot.waitForIdle();
robot.delay(1000);
//robot.getPixelColor() didn't work right for some reason
capture =
robot.createScreenCapture(new Rectangle(LOC, LOC, SIZE, SIZE));
} finally {
SwingUtilities.invokeAndWait(testFrame::dispose);
SwingUtilities.invokeAndWait(backgroundFrame::dispose);
}
int redRGB = Color.RED.getRGB();
if (redRGB != capture.getRGB(SIZE/2, SIZE/2)) {
throw new RuntimeException("Transparent frame is not transparent!");
}
}
public static void setOpaque(Window window, boolean opaque) {
Color bg = window.getBackground();
if (bg == null) {
bg = new Color(0, 0, 0, 0);
}
window.setBackground(new Color(bg.getRed(), bg.getGreen(), bg.getBlue(),
opaque ? 255 : 0));
}
private static GraphicsConfiguration getGC() {
GraphicsConfiguration transparencyCapableGC =
GraphicsEnvironment.getLocalGraphicsEnvironment()
.getDefaultScreenDevice().getDefaultConfiguration();
if (!transparencyCapableGC.isTranslucencyCapable()) {
transparencyCapableGC = null;
GraphicsEnvironment env =
GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice[] devices = env.getScreenDevices();
for (int i = 0; i < devices.length && transparencyCapableGC == null; i++) {
GraphicsConfiguration[] configs = devices[i].getConfigurations();
for (int j = 0; j < configs.length && transparencyCapableGC == null; j++) {
if (configs[j].isTranslucencyCapable()) {
transparencyCapableGC = configs[j];
}
}
}
}
return transparencyCapableGC;
}
}
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