com.sun.javafx.iio.png.PNGImageLoaderFactory Maven / Gradle / Ivy

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This is a backport of OpenJFX 8 to run on Java 7.

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/*
 * Copyright (c) 2009, 2013, 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.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * 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.
 */

package com.sun.javafx.iio.png;

import com.sun.javafx.iio.ImageFormatDescription;
import com.sun.javafx.iio.ImageLoader;
import com.sun.javafx.iio.ImageLoaderFactory;
import java.io.IOException;
import java.io.InputStream;
import java.security.*;

public class PNGImageLoaderFactory implements ImageLoaderFactory {

    static private final String selectorPropertyName = "prism.useOldPNG";
    static private boolean useOldPngLoader =
        AccessController.doPrivileged(new PrivilegedAction() {
            public Boolean run() {
                return Boolean.valueOf(Boolean.getBoolean(selectorPropertyName));
            }
        });

    private static final PNGImageLoaderFactory theInstance =
            new PNGImageLoaderFactory();

    private PNGImageLoaderFactory() {}

    public static final ImageLoaderFactory getInstance() {
        return theInstance;
    }

    public ImageFormatDescription getFormatDescription() {
        return PNGDescriptor.getInstance();
    }

    public ImageLoader createImageLoader(InputStream input) throws IOException {
        return useOldPngLoader ? new PNGImageLoader(input) : new PNGImageLoader2(input);
    }

}