Quelle DashedRectTest.java Sprache: JAVA

/*
* Copyright (c) 2018, 2022, 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.BasicStroke;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.awt.image.Raster;
import java.io.File;
import java.io.IOException;
import java.util.Arrays;
import javax.imageio.ImageIO;

/**
* Simple Dashed Rect rendering test
*
* @test
* @summary verify that dashed rectangle is properly rasterized
* @bug 8202580
*/
public class DashedRectTest {

    static final boolean SAVE_IMAGE = false;

    private final static int N = 10;

    final static float DASH_LEN = 3.0f;
    final static float DASH_PH = 5000f;

    final static int MAX = 100;

    public static void main(String[] args) {

        final int size = 200;

        // First display which renderer is tested:
        // JDK9 only:
        System.setProperty("sun.java2d.renderer.verbose", "true");

        System.out.println("DashedRectTest: size = " + size);

        final BufferedImage image = new BufferedImage(size, size, BufferedImage.TYPE_INT_ARGB);

        final Graphics2D g2d = (Graphics2D) image.getGraphics();
        try {
            g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_OFF);
            g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
            g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);

            g2d.setClip(0, 0, size, size);

            g2d.setBackground(Color.WHITE);
            g2d.clearRect(0, 0, size, size);

            // Corrupt Marlin Dasher.dash cached array:
            g2d.setColor(Color.RED);
            g2d.setStroke(createBadStroke());
            g2d.drawRect(20, 20, 50, 50);

            g2d.setStroke(createStroke());

            g2d.setColor(Color.BLUE);

            for (int i = 0; i < N; i++) {
                final long start = System.nanoTime();

                g2d.drawRect(5, 5, MAX, MAX);

                final long time = System.nanoTime() - start;

                System.out.println("paint: duration= " + (1e-6 * time) + " ms.");
            }

            if (SAVE_IMAGE) {
                try {
                    final File file = new File("DashedRectTest-MAX-" + MAX + "-dashed.png");

                    System.out.println("Writing file: " + file.getAbsolutePath());
                    ImageIO.write(image, "PNG", file);
                } catch (IOException ex) {
                    ex.printStackTrace();
                }
            }

            // Check image on few pixels:
            final Raster raster = image.getData();

            // 10, 5 = blue
            checkPixel(raster, 10, 5, Color.BLUE.getRGB());

        } finally {
            g2d.dispose();
        }
    }

    private static void checkPixel(final Raster raster,
                                   final int x, final int y,
                                   final int expected) {

        final int[] rgb = (int[]) raster.getDataElements(x, y, null);

        if (rgb[0] != expected) {
            throw new IllegalStateException("bad pixel at (" + x + ", " + y
                + ") = " + rgb[0] + " expected: " + expected);
        }
    }

    private static BasicStroke createStroke() {
        return new BasicStroke(2f, BasicStroke.CAP_SQUARE, BasicStroke.JOIN_MITER, 10.0f,
                new float[]{DASH_LEN}, DASH_PH) {

        };
    }

    private static BasicStroke createBadStroke() {
        final float[] dash = new float[100];
        Arrays.fill(dash, 19.333f);

        return new BasicStroke(2f, BasicStroke.CAP_SQUARE, BasicStroke.JOIN_MITER, 10.0f, dash, DASH_PH);
    }

}

quality84%

¤ Dauer der Verarbeitung: 0.11 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.