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Java example source code file (AcceleratedScaleTest.java)

This example Java source code file (AcceleratedScaleTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

acceleratedscaletest, awt, bit, bufferedimage, file, found, frame, graphics2d, graphicsconfiguration, image, image_size, image_size\/4, imageio, ioexception, runtimeexception, test, volatileimage

The AcceleratedScaleTest.java Java example source code

/*
 * Copyright (c) 2006, 2008, 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.
 */

import java.awt.Color;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsEnvironment;
import java.awt.RenderingHints;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.awt.image.VolatileImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;

/**
 * @test
 * @bug 6429665
 * @bug 6588884
 * @summary Tests that the transform is correctly handled
 * @author Dmitri.Trembovetski area=Graphics
 * @run main AcceleratedScaleTest
 * @run main/othervm -Dsun.java2d.d3d=true AcceleratedScaleTest
 * @run main/othervm -Dsun.java2d.opengl=true AcceleratedScaleTest
 */
public class AcceleratedScaleTest {
    private static final int IMAGE_SIZE = 200;
    private static VolatileImage destVI;

    private static void initVI(GraphicsConfiguration gc) {
        int res;
        if (destVI == null) {
            res = VolatileImage.IMAGE_INCOMPATIBLE;
        } else {
            res = destVI.validate(gc);
        }
        if (res == VolatileImage.IMAGE_INCOMPATIBLE) {
            if (destVI != null) destVI.flush();
            destVI = gc.createCompatibleVolatileImage(IMAGE_SIZE, IMAGE_SIZE);
            destVI.validate(gc);
            res = VolatileImage.IMAGE_RESTORED;
        }
        if (res == VolatileImage.IMAGE_RESTORED) {
            Graphics vig = destVI.getGraphics();
            vig.setColor(Color.red);
            vig.fillRect(0, 0, destVI.getWidth(), destVI.getHeight());
            vig.dispose();
        }
    }

    public static void main(String[] args) {
        Frame f = new Frame();
        f.pack();
        GraphicsConfiguration gc = f.getGraphicsConfiguration();
        if (gc.getColorModel().getPixelSize() < 16) {
            System.out.printf("Bit depth: %d . Test considered passed.",
                              gc.getColorModel().getPixelSize());
            f.dispose();
            return;
        }

        BufferedImage bi =
            new BufferedImage(IMAGE_SIZE/4, IMAGE_SIZE/4,
                              BufferedImage.TYPE_INT_RGB);
        Graphics2D g = (Graphics2D)bi.getGraphics();
        g.setColor(Color.red);
        g.fillRect(0, 0, bi.getWidth(), bi.getHeight());
        BufferedImage snapshot;
        do {
            initVI(gc);
            g = (Graphics2D)destVI.getGraphics();
            // "accelerate" BufferedImage
            for (int i = 0; i < 5; i++) {
                g.drawImage(bi, 0, 0, null);
            }
            g.setColor(Color.white);
            g.fillRect(0, 0, destVI.getWidth(), destVI.getHeight());

            // this will force the use of Transform primitive instead of
            // Scale (the latter doesn't do bilinear filtering required by
            // VALUE_RENDER_QUALITY, which triggers the bug in D3D pipeline
            g.setRenderingHint(RenderingHints.KEY_RENDERING,
                               RenderingHints.VALUE_RENDER_QUALITY);
            g.drawImage(bi, 0, 0, destVI.getWidth(), destVI.getHeight(), null);
            g.fillRect(0, 0, destVI.getWidth(), destVI.getHeight());

            g.drawImage(bi, 0, 0, destVI.getWidth(), destVI.getHeight(), null);

            snapshot = destVI.getSnapshot();
        } while (destVI.contentsLost());

        f.dispose();
        int whitePixel = Color.white.getRGB();
        for (int y = 0; y < snapshot.getHeight(); y++) {
            for (int x = 0; x < snapshot.getWidth(); x++) {
                if (snapshot.getRGB(x, y) == whitePixel) {
                    System.out.printf("Found untouched pixel at %dx%d\n", x, y);
                    System.out.println("Dumping the dest. image to " +
                                       "AcceleratedScaleTest_dst.png");
                    try {
                        ImageIO.write(snapshot, "png",
                                      new File("AcceleratedScaleTest_dst.png"));
                    } catch (IOException ex) {
                        ex.printStackTrace();
                    }
                    throw new RuntimeException("Test failed.");
                }
            }
        }
        System.out.println("Test Passed.");
    }

}

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