Java example source code file (CustomCompositeTest.java)

This example Java source code file (CustomCompositeTest.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

awt, bufferedimage, countdownlatch, databufferint, dimension, failed, graphics2d, gui, image, interruptedexception, jframe, mycomp, runnable, runtimeexception, singlepixelpackedsamplemodel, swing, testcompositecontext, threading, threads, throwable

The CustomCompositeTest.java Java example source code

/*
 * Copyright (c) 2012, 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
 * @bug     7124347
 * @summary Verifies that rendering with XOR composite, and arbitraty
 *          custom composite doesn not cause internal errors.
 *
 * @run     main/othervm -Dsun.java2d.opengl=True CustomCompositeTest
 */

import java.awt.AWTException;
import java.awt.Color;
import java.awt.Composite;
import java.awt.CompositeContext;
import java.awt.Dimension;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsEnvironment;
import java.awt.ImageCapabilities;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;
import java.awt.image.DataBufferInt;
import java.awt.image.Raster;
import java.awt.image.SinglePixelPackedSampleModel;
import java.awt.image.VolatileImage;
import java.awt.image.WritableRaster;
import java.util.concurrent.CountDownLatch;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;

public class CustomCompositeTest {

    private static JFrame frame;
    private static CountDownLatch paintLatch;
    private static Throwable paintError;

    public static void main(String[] args) {

        paintLatch = new CountDownLatch(1);
        paintError = null;

        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                initGUI();
            }
        });

        try {
            paintLatch.await();
        } catch (InterruptedException e) {
        };
        System.out.println("Paint is done!");
        if (paintError != null) {
            frame.dispose();
            throw new RuntimeException("Test FAILED.", paintError);
        }

        System.out.println("Phase 1: PASSED.");

        // now resise the frame in order to cause re-paint with accelerated
        // source images.
        paintError = null;
        paintLatch = new CountDownLatch(1);

        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                Dimension size = frame.getSize();
                size.width += 50;
                size.height += 50;

                frame.setSize(size);
            }
        });

        try {
            paintLatch.await();
        } catch (InterruptedException e) {
        };
        if (paintError != null) {
            frame.dispose();
            throw new RuntimeException("Resize test FAILED.", paintError);
        }
        frame.dispose();
        System.out.println("Phase 2: PASSED.");

        GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment();
        GraphicsConfiguration cfg = env.getDefaultScreenDevice().getDefaultConfiguration();
        // test rendering to accelerated volatile image
        testVolatileImage(cfg, true);
        System.out.println("Phase 3: PASSED.");

        // test rendering to unaccelerated volatile image
        testVolatileImage(cfg, false);
        System.out.println("Phase 4: PASSED.");
    }

    private static void testVolatileImage(GraphicsConfiguration cfg,
            boolean accelerated)
    {
        VolatileImage dst = null;
        try {
            dst = cfg.createCompatibleVolatileImage(640, 480,
                new ImageCapabilities(accelerated));
        } catch (AWTException e) {
            System.out.println("Unable to create volatile image, skip the test.");
            return;
        }
        renderToVolatileImage(dst);
    }

    private static void renderToVolatileImage(VolatileImage dst) {
        Graphics2D g = dst.createGraphics();
        do {
            System.out.println("Render to volatile image..");
            try {
                MyComp.renderTest(g, dst.getHeight(), dst.getHeight());
            } catch (Throwable e) {
                throw new RuntimeException("Test FAILED.", e);
            }
        } while (dst.contentsLost());
        System.out.println("Done.");
    }

    private static void initGUI() {
        frame = new JFrame("Silly composite");
        frame.getContentPane().add(new MyComp());
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.pack();
        frame.setVisible(true);
    }

    private static class MyComp extends JComponent {

        private static BufferedImage theImage;

        public MyComp() {
        }

        private static BufferedImage getTestImage() {
            if (theImage == null) {
                theImage = new BufferedImage(256, 256, BufferedImage.TYPE_INT_ARGB);
                Graphics2D g2d = theImage.createGraphics();
                g2d.setColor(Color.red);
                g2d.fillRect(0, 0, 256, 256);

                g2d.setPaint(new GradientPaint(0, 0, Color.red, 256, 256, Color.blue));
                g2d.fillRect(0, 100, 256, 256);
                g2d.dispose();
            }
            return theImage;
        }

        public Dimension getPreferredSize() {
            return new Dimension(640, 375);
        }

        public void paintComponent(Graphics g) {


            Graphics2D g2d = (Graphics2D) g;
            try {
                renderTest(g2d, getWidth(), getHeight());
            } catch (Throwable e) {
                paintError = e;
            }
            if (paintLatch != null) {
                paintLatch.countDown();
            }
        }

        public static void renderTest(Graphics2D g2d, int w, int h) {
            g2d.setColor(Color.yellow);
            g2d.fillRect(0, 0, w, h);

            BufferedImage image = getTestImage();
            // draw original image
            g2d.drawRenderedImage(image, null);

            // draw image with custom composite
            g2d.translate(175, 25);
            Composite currentComposite = g2d.getComposite();
            g2d.setComposite(new TestComposite());
            g2d.drawRenderedImage(image, null);
            g2d.setComposite(currentComposite);

            // draw image with XOR
            g2d.translate(175, 25);
            g2d.setXORMode(Color.red);
            g2d.drawRenderedImage(image, null);


            System.out.println("Painting is done...");
        }
    }

    // A silly custom Composite to demonstrate the problem - just inverts the RGB
    private static class TestComposite implements Composite {

        public CompositeContext createContext(ColorModel srcColorModel, ColorModel dstColorModel, RenderingHints hints) {
            return new TestCompositeContext();
        }
    }

    private static class TestCompositeContext implements CompositeContext {

        public void dispose() {
        }

        public void compose(Raster src, Raster dstIn, WritableRaster dstOut) {
            int w = src.getWidth();
            int h = src.getHeight();

            DataBufferInt srcDB = (DataBufferInt) src.getDataBuffer();
            DataBufferInt dstOutDB = (DataBufferInt) dstOut.getDataBuffer();
            int srcRGB[] = srcDB.getBankData()[0];
            int dstOutRGB[] = dstOutDB.getBankData()[0];
            int srcOffset = srcDB.getOffset();
            int dstOutOffset = dstOutDB.getOffset();
            int srcScanStride = ((SinglePixelPackedSampleModel) src.getSampleModel()).getScanlineStride();
            int dstOutScanStride = ((SinglePixelPackedSampleModel) dstOut.getSampleModel()).getScanlineStride();
            int srcAdjust = srcScanStride - w;
            int dstOutAdjust = dstOutScanStride - w;

            int si = srcOffset;
            int doi = dstOutOffset;

            for (int i = 0; i < h; i++) {
                for (int j = 0; j < w; j++) {
                    dstOutRGB[doi] = srcRGB[si] ^ 0x00ffffff;
                    si++;
                    doi++;
                }

                si += srcAdjust;
                doi += dstOutAdjust;
            }
        }
    }
}