jdk/test/java/awt/Graphics/CopyScaledArea/CopyScaledAreaTest.java

/*
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 * 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.
 *
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 */

import java.awt.*;
import java.awt.image.BufferedImage;
import java.awt.image.VolatileImage;
import static sun.awt.OSInfo.*;

/**
 * @test
 * @bug 8069348
 * @summary SunGraphics2D.copyArea() does not properly work for scaled graphics
 * @modules java.desktop/sun.awt
 * @run main/othervm -Dsun.java2d.uiScale=2 CopyScaledAreaTest
 * @run main/othervm -Dsun.java2d.opengl=true -Dsun.java2d.uiScale=2 CopyScaledAreaTest
 * @run main/othervm -Dsun.java2d.d3d=true    -Dsun.java2d.uiScale=2 CopyScaledAreaTest
 * @run main/othervm -Dsun.java2d.d3d=false   -Dsun.java2d.opengl=false
 *                   -Dsun.java2d.uiScale=2 CopyScaledAreaTest
 */
public class CopyScaledAreaTest {

    private static final int IMAGE_WIDTH = 800;
    private static final int IMAGE_HEIGHT = 800;
    private static final int X = 50;
    private static final int Y = 50;
    private static final int W = 100;
    private static final int H = 75;
    private static final int DX = 15;
    private static final int DY = 10;
    private static final int N = 3;
    private static final Color BACKGROUND_COLOR = Color.YELLOW;
    private static final Color FILL_COLOR = Color.ORANGE;
    private static final double[][] SCALES = {{1.3, 1.4}, {0.3, 2.3}, {2.7, 0.1}};

    private static boolean isSupported() {
        String d3d = System.getProperty("sun.java2d.d3d");
        return !Boolean.getBoolean(d3d) || getOSType() == OSType.WINDOWS;
    }

    private static int scale(int x, double scale) {
        return (int) Math.floor(x * scale);
    }

    private static VolatileImage createVolatileImage(GraphicsConfiguration conf) {
        return conf.createCompatibleVolatileImage(IMAGE_WIDTH, IMAGE_HEIGHT);
    }

    // rendering to the image
    private static void renderOffscreen(VolatileImage vImg,
                                        GraphicsConfiguration conf,
                                        double scaleX,
                                        double scaleY)
    {
        int attempts = 0;
        do {

            if (attempts > 10) {
                throw new RuntimeException("Too many attempts!");
            }

            if (vImg.validate(conf) == VolatileImage.IMAGE_INCOMPATIBLE) {
                // old vImg doesn't work with new GraphicsConfig; re-create it
                vImg = createVolatileImage(conf);
            }
            Graphics2D g = vImg.createGraphics();
            //
            // miscellaneous rendering commands...
            //
            g.setColor(BACKGROUND_COLOR);
            g.fillRect(0, 0, IMAGE_WIDTH, IMAGE_HEIGHT);
            g.scale(scaleX, scaleY);

            g.setColor(FILL_COLOR);
            g.fillRect(X, Y, W, H);

            for (int i = 0; i < N; i++) {
                g.copyArea(X + i * DX, Y + i * DY, W, H, DX, DY);
            }
            g.dispose();
            attempts++;
        } while (vImg.contentsLost());
    }

    public static void main(String[] args) throws Exception {

        if (!isSupported()) {
            return;
        }

        GraphicsConfiguration graphicsConfiguration =
                GraphicsEnvironment.getLocalGraphicsEnvironment()
                .getDefaultScreenDevice().getDefaultConfiguration();

        for(double[] scales: SCALES){
            testScale(scales[0], scales[1], graphicsConfiguration);
        }
    }

    private static void testScale(double scaleX, double scaleY,
                                  GraphicsConfiguration gc) throws Exception
    {

        BufferedImage buffImage = new BufferedImage(IMAGE_WIDTH, IMAGE_HEIGHT,
                                                    BufferedImage.TYPE_INT_RGB);
        Graphics g = buffImage.createGraphics();

        VolatileImage vImg = createVolatileImage(gc);

        int attempts = 0;
        do {

            if (attempts > 10) {
                throw new RuntimeException("Too many attempts!");
            }

            int returnCode = vImg.validate(gc);
            if (returnCode == VolatileImage.IMAGE_RESTORED) {
                // Contents need to be restored
                renderOffscreen(vImg, gc, scaleX, scaleY); // restore contents
            } else if (returnCode == VolatileImage.IMAGE_INCOMPATIBLE) {
                // old vImg doesn't work with new GraphicsConfig; re-create it
                vImg = createVolatileImage(gc);
                renderOffscreen(vImg, gc, scaleX, scaleY);
            }
            g.drawImage(vImg, 0, 0, null);
            attempts++;
        } while (vImg.contentsLost());

        g.dispose();

        int x = scale(X + N * DX, scaleX) + 1;
        int y = scale(Y + N * DY, scaleY) + 1;
        int w = scale(W, scaleX) - 2;
        int h = scale(H, scaleY) - 2;

        for (int i = x; i < x + w; i++) {
            for (int j = y; j < y + h; j++) {
                if (buffImage.getRGB(i, j) != FILL_COLOR.getRGB()) {
                    throw new RuntimeException("Wrong rectangle color!");
                }
            }
        }
    }
}