bytearrayimagesource.java

来自「This is a resource based on j2me embedde」· Java 代码 · 共 63 行

/*
 * @(#)ByteArrayImageSource.java	1.11 06/10/10
 *
 * Copyright  1990-2008 Sun Microsystems, Inc. All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 * 
 * This program 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 program 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 at /legal/license.txt). 
 * 
 * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 or visit www.sun.com if you need additional
 * information or have any questions. 
 *
 */

package sun.awt.image;

import java.io.InputStream;
import java.io.ByteArrayInputStream;
import java.io.BufferedInputStream;

public class ByteArrayImageSource extends InputStreamImageSource {
    byte[] imagedata;
    int imageoffset;
    int imagelength;
    public ByteArrayImageSource(byte[] data) {
        this(data, 0, data.length);
    }

    public ByteArrayImageSource(byte[] data, int offset, int length) {
        imagedata = data;
        imageoffset = offset;
        imagelength = length;
    }

    final boolean checkSecurity(Object context, boolean quiet) {
        // No need to check security.  Applets and downloaded code can
        // only make byte array image once they already have a handle
        // on the image data anyway...
        return true;
    }

    protected ImageDecoder getDecoder() {
        InputStream is =
            new BufferedInputStream(new ByteArrayInputStream(imagedata,
                    imageoffset,
                    imagelength));
        return getDecoder(is);
    }
}