132 lines
4.8 KiB
Java
132 lines
4.8 KiB
Java
/*
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* Copyright (c) 2009, 2021, 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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/*
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* @test
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* @key headful
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* @bug 6683775 6794764 8186617
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* @summary Painting artifacts is seen when panel is made setOpaque(false) for a
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* translucent window
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*/
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import java.awt.Color;
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import java.awt.GraphicsConfiguration;
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import java.awt.GraphicsDevice;
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import java.awt.GraphicsEnvironment;
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import java.awt.Rectangle;
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import java.awt.Robot;
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import java.awt.Window;
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import java.awt.image.BufferedImage;
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import javax.swing.JFrame;
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import javax.swing.JPanel;
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import javax.swing.SwingUtilities;
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public class bug6683775 {
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static final int LOC = 100,
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SIZE = 200;
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static JFrame testFrame;
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static JFrame backgroundFrame;
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static BufferedImage capture;
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public static void main(String[] args) throws Exception {
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GraphicsConfiguration gc = getGC();
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if (gc == null || !gc.getDevice().isWindowTranslucencySupported(
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GraphicsDevice.WindowTranslucency.PERPIXEL_TRANSLUCENT)) {
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return;
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}
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Robot robot = new Robot();
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try {
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SwingUtilities.invokeAndWait(() -> {
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testFrame = new JFrame(gc);
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backgroundFrame = new JFrame("Background frame");
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backgroundFrame.setUndecorated(true);
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JPanel panel = new JPanel();
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panel.setBackground(Color.RED);
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backgroundFrame.add(panel);
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backgroundFrame.setBounds(LOC, LOC, SIZE, SIZE);
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backgroundFrame.setVisible(true);
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testFrame.setUndecorated(true);
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JPanel p = new JPanel();
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p.setOpaque(false);
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testFrame.add(p);
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setOpaque(testFrame, false);
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testFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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testFrame.setBounds(LOC, LOC, SIZE, SIZE);
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testFrame.setVisible(true);
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});
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robot.waitForIdle();
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robot.delay(1000);
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//robot.getPixelColor() didn't work right for some reason
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capture =
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robot.createScreenCapture(new Rectangle(LOC, LOC, SIZE, SIZE));
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} finally {
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SwingUtilities.invokeAndWait(testFrame::dispose);
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SwingUtilities.invokeAndWait(backgroundFrame::dispose);
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}
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int redRGB = Color.RED.getRGB();
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if (redRGB != capture.getRGB(SIZE/2, SIZE/2)) {
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throw new RuntimeException("Transparent frame is not transparent!");
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}
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}
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public static void setOpaque(Window window, boolean opaque) {
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Color bg = window.getBackground();
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if (bg == null) {
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bg = new Color(0, 0, 0, 0);
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}
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window.setBackground(new Color(bg.getRed(), bg.getGreen(), bg.getBlue(),
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opaque ? 255 : 0));
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}
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private static GraphicsConfiguration getGC() {
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GraphicsConfiguration transparencyCapableGC =
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GraphicsEnvironment.getLocalGraphicsEnvironment()
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.getDefaultScreenDevice().getDefaultConfiguration();
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if (!transparencyCapableGC.isTranslucencyCapable()) {
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transparencyCapableGC = null;
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GraphicsEnvironment env =
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GraphicsEnvironment.getLocalGraphicsEnvironment();
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GraphicsDevice[] devices = env.getScreenDevices();
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for (int i = 0; i < devices.length && transparencyCapableGC == null; i++) {
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GraphicsConfiguration[] configs = devices[i].getConfigurations();
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for (int j = 0; j < configs.length && transparencyCapableGC == null; j++) {
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if (configs[j].isTranslucencyCapable()) {
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transparencyCapableGC = configs[j];
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}
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}
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}
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}
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return transparencyCapableGC;
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}
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}
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