153 lines
6.1 KiB
Java
153 lines
6.1 KiB
Java
/*
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* Copyright (c) 2015, 2022, 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 java.awt.BorderLayout;
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import java.awt.Canvas;
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import java.awt.Color;
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import java.awt.Frame;
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import java.awt.Graphics;
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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 javax.swing.UIManager;
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import javax.imageio.ImageIO;
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import java.io.File;
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import java.io.IOException;
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/**
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* @test
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* @key headful
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* @bug 8073320 8280861
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* @summary Linux and Windows HiDPI support
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* @author Alexander Scherbatiy
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* @requires (os.family == "linux" | os.family == "windows")
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* @run main/othervm -Dsun.java2d.win.uiScaleX=3 -Dsun.java2d.win.uiScaleY=2
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* HiDPIRobotScreenCaptureTest
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* @run main/othervm -Dsun.java2d.uiScale=1 HiDPIRobotScreenCaptureTest
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* @run main/othervm -Dsun.java2d.uiScale=2 HiDPIRobotScreenCaptureTest
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*/
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public class HiDPIRobotScreenCaptureTest {
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private static final Color[] COLORS = {
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Color.GREEN, Color.BLUE, Color.ORANGE, Color.RED};
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public static void main(String[] args) throws Exception {
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if (System.getProperty("os.name").toLowerCase().contains("win")) {
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try {
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UIManager.setLookAndFeel(
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"com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
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} catch (Exception e) {
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return;
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}
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}
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Frame frame = new Frame();
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// Position the frame on prime number coordinates (mind OFFSET)
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// to avoid them being multiple of the desktop scale; this tests Linux
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// color picker better.
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// Also, the position should be far enough from the top left
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// corner of the screen to reduce the chance of being repositioned
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// by the system because that area's occupied by the global
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// menu bar and such.
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frame.setBounds(78, 92, 100, 100);
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frame.setUndecorated(true);
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Panel panel = new Panel(new BorderLayout());
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Canvas canvas = new Canvas() {
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@Override
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public void paint(Graphics g) {
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super.paint(g);
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int w = getWidth();
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int h = getHeight();
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g.setColor(COLORS[0]);
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g.fillRect(0, 0, w / 2, h / 2);
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g.setColor(COLORS[1]);
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g.fillRect(w / 2, 0, w / 2, h / 2);
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g.setColor(COLORS[2]);
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g.fillRect(0, h / 2, w / 2, h / 2);
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g.setColor(COLORS[3]);
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g.fillRect(w / 2, h / 2, w / 2, h / 2);
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}
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};
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panel.add(canvas);
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frame.add(panel);
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frame.setVisible(true);
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Robot robot = new Robot();
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robot.waitForIdle();
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robot.delay(500);
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Rectangle rect = canvas.getBounds();
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rect.setLocation(canvas.getLocationOnScreen());
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System.out.println("Creating screen capture of " + rect);
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BufferedImage image = robot.createScreenCapture(rect);
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frame.dispose();
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int w = image.getWidth();
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int h = image.getHeight();
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if (w != frame.getWidth() || h != frame.getHeight()) {
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throw new RuntimeException("Wrong image size!");
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}
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checkRectColor(image, new Rectangle(0, 0, w / 2, h / 2), COLORS[0]);
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checkRectColor(image, new Rectangle(w / 2, 0, w / 2, h / 2), COLORS[1]);
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checkRectColor(image, new Rectangle(0, h / 2, w / 2, h / 2), COLORS[2]);
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checkRectColor(image, new Rectangle(w / 2, h / 2, w / 2, h / 2), COLORS[3]);
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}
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private static final int OFFSET = 5;
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static void checkRectColor(BufferedImage image, Rectangle rect, Color expectedColor) {
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System.out.println("Checking rectangle " + rect + " to have color " + expectedColor);
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final Point[] pointsToCheck = new Point[] {
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new Point(rect.x + OFFSET, rect.y + OFFSET), // top left corner
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new Point(rect.x + rect.width - OFFSET, rect.y + OFFSET), // top right corner
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new Point(rect.x + rect.width / 2, rect.y + rect.height / 2), // center
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new Point(rect.x + OFFSET, rect.y + rect.height - OFFSET), // bottom left corner
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new Point(rect.x + rect.width - OFFSET, rect.y + rect.height - OFFSET) // bottom right corner
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};
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for (final var point : pointsToCheck) {
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System.out.print("Checking color at " + point + " to be equal to " + expectedColor);
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final int actualColor = image.getRGB(point.x, point.y);
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if (actualColor != expectedColor.getRGB()) {
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System.out.println("... Mismatch: found " + new Color(actualColor) + " instead. Check image.png.");
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try {
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ImageIO.write(image, "png", new File("image.png"));
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} catch(IOException e) {
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System.out.println("failed to save image.png.");
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e.printStackTrace();
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}
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throw new RuntimeException("Wrong image color!");
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} else {
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System.out.println("... OK");
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}
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}
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}
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}
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