Quelle NaNTransform.java Sprache: JAVA

/*
* 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.
*/
/**
* @test
* @bug 6357987 6513889 8023213
* @summary Font/Text APIs should not crash if transform includes NaN
* @author prr
* @run main NaNTransform
*/
import java.awt.*;
import java.awt.font.*;
import java.awt.geom.*;
import java.awt.image.*;

public class NaNTransform {

    private static void testShape(String msg, Shape s) {
        if (!(new Area(s).isEmpty())) {
            System.out.println(msg+"="+s);
            throw new RuntimeException("Warning: expected this to be empty");
        }
    }

    public static void main(String [] args) {

        float NaN=0f/0f;
        float[] vals = new float[6];
        for (int i=0;i<6;i++) vals[i]=NaN;
        AffineTransform nanTX = new AffineTransform(vals);

        BufferedImage bi = new BufferedImage(1,1,BufferedImage.TYPE_INT_RGB);
        Graphics2D g2d = bi.createGraphics();

        g2d.rotate(NaN);

        Font font = g2d.getFont();
        FontMetrics fm = g2d.getFontMetrics();
        FontRenderContext frc = g2d.getFontRenderContext();

        int adv = fm.stringWidth("ABCDEF");
        if (adv != 0) {
            System.out.println("strWidth="+adv);
            throw new RuntimeException("Warning: expected this to be zero");
        }
        testShape("strBounds", font.getStringBounds("12345", frc));

        TextLayout tl = new TextLayout("Some text", font, frc);
        testShape("tl PixelBounds 1", tl.getPixelBounds(frc, 20, 10));
        testShape("tl PixelBounds 2", tl.getPixelBounds(frc, NaN, NaN));
        testShape("tl Outline", tl.getOutline(nanTX));

        GlyphVector gv = font.createGlyphVector(frc, "abcdef");
        testShape("gv PixelBounds 1", gv.getPixelBounds(frc, 0, 0));
        testShape("gv PixelBounds 2", gv.getPixelBounds(frc, NaN, NaN));
        testShape("gv Outline", gv.getOutline(NaN, NaN));

        gv.setGlyphTransform(0, nanTX);
        testShape("gv PixelBounds 1A", gv.getPixelBounds(frc, 0, 0));
        testShape("gv PixelBounds 2A", gv.getPixelBounds(frc, NaN, NaN));
        testShape("gv Outline A", gv.getOutline(NaN, NaN));

        g2d.drawString("BOO!", 20, 20);

        Font nanFont;
        for (int i=0; i<5000; i++) {
            nanFont = font.deriveFont(Float.NaN);
            g2d.setFont(nanFont);
            g2d.drawString("abc", 20, 20);
        }
        System.out.println("Test passed (no crash)");
    }
}

quality89%

¤ Dauer der Verarbeitung: 0.9 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.