russell@unturf.com
0a580b313d
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
134 lines
4.5 KiB
Java
134 lines
4.5 KiB
Java
/*
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* Copyright Amazon.com Inc. 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.Color;
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import java.awt.Frame;
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import java.awt.Graphics;
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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.BufferStrategy;
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import java.awt.image.BufferedImage;
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import java.io.File;
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import javax.imageio.ImageIO;
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/**
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* @test
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* @bug 8378201
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* @key headful
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* @summary Verifies that WINDOW and FLIP_BACKBUFFER surfaces sharing the same X
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* Window render and flip correctly
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* @run main/othervm FlipCoexistTest
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* @run main/othervm -Dsun.java2d.opengl=True FlipCoexistTest
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*/
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public final class FlipCoexistTest {
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private static final int SIZE = 200;
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private static final int TOLERANCE = 10;
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public static void main(String[] args) throws Exception {
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Frame f = new Frame("FlipCoexistTest");
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try {
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f.setUndecorated(true);
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f.setSize(SIZE, SIZE);
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f.setLocation(100, 100);
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f.setVisible(true);
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Robot robot = new Robot();
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robot.waitForIdle();
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robot.delay(1000);
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int w = f.getWidth();
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int h = f.getHeight();
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// Fill window RED via direct render (WINDOW surface)
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Graphics g = f.getGraphics();
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g.setColor(Color.RED);
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g.fillRect(0, 0, w, h);
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g.dispose();
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robot.waitForIdle();
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robot.delay(500);
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// Request flip if available, blit is also useful to cover
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f.createBufferStrategy(2);
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BufferStrategy bs = f.getBufferStrategy();
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// Render BLUE to back buffer, do not flip yet
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Graphics bg = bs.getDrawGraphics();
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bg.setColor(Color.BLUE);
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bg.fillRect(0, 0, w, h);
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bg.dispose();
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// Paint small GREEN rect via direct render
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g = f.getGraphics();
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g.setColor(Color.GREEN);
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g.fillRect(0, 0, 10, 10);
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g.dispose();
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robot.waitForIdle();
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robot.delay(500);
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// GREEN rect must be visible
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check(robot, f, 5, 5, Color.GREEN, "small rect");
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// RED must survive the context round-trip
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check(robot, f, w / 2, h / 2, Color.RED, "survived");
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// Show back buffer, BLUE must appear
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bs.show();
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robot.waitForIdle();
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robot.delay(500);
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check(robot, f, w / 2, h / 2, Color.BLUE, "flip");
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} finally {
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f.dispose();
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}
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}
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private static void check(Robot robot, Frame frame, int x, int y, Color exp,
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String desc)
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{
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Point loc = frame.getLocationOnScreen();
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Color c = robot.getPixelColor(loc.x + x, loc.y + y);
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if (!isAlmostEqual(c, exp)) {
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saveImage(robot, frame, desc);
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throw new RuntimeException("%s: %s != %s".formatted(desc, exp, c));
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}
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}
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private static void saveImage(Robot r, Frame f, String name) {
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try {
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Rectangle rect = f.getBounds();
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BufferedImage img = r.createScreenCapture(rect);
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ImageIO.write(img, "png", new File(name + ".png"));
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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private static boolean isAlmostEqual(Color c1, Color c2) {
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return Math.abs(c1.getRed() - c2.getRed()) <= TOLERANCE
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&& Math.abs(c1.getGreen() - c2.getGreen()) <= TOLERANCE
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&& Math.abs(c1.getBlue() - c2.getBlue()) <= TOLERANCE;
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}
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}
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