/*

 * Copyright (c) 2015, 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.*;

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!");

                }

            }

        }

    }

}