127 lines
3.0 KiB
Java
127 lines
3.0 KiB
Java
//******************************************************************************
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//
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// File: ChunkOutputStream.java
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// Package: edu.rit.image.png
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// Unit: Class edu.rit.image.png.ChunkOutputStream
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//
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// This Java source file is copyright (C) 2013 by Alan Kaminsky. All rights
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// reserved. For further information, contact the author, Alan Kaminsky, at
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// ark@cs.rit.edu.
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//
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// This Java source file is part of the Parallel Java 2 Library ("PJ2"). PJ2 is
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// free software; you can redistribute it and/or modify it under the terms of
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// the GNU General Public License as published by the Free Software Foundation;
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// either version 3 of the License, or (at your option) any later version.
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//
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// PJ2 is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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// A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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//
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// A copy of the GNU General Public License is provided in the file gpl.txt. You
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// may also obtain a copy of the GNU General Public License on the World Wide
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// Web at http://www.gnu.org/licenses/gpl.html.
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//
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//******************************************************************************
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package edu.rit.image.png;
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import java.io.Closeable;
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import java.io.DataOutputStream;
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import java.io.Flushable;
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import java.io.IOException;
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import java.io.OutputStream;
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/**
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* Class ChunkOutputStream provides an object for writing PNG image chunks to an
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* {@linkplain OutputStream}.
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*
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* @author Alan Kaminsky
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* @version 22-May-2013
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*/
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public class ChunkOutputStream
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implements ChunkOutput, Closeable, Flushable
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{
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// Hidden data members.
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private DataOutputStream out;
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// Exported constructors.
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/**
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* Construct a new chunk output stream that will write to the given
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* underlying output stream.
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*
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* @param out Output stream.
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*
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* @exception NullPointerException
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* (unchecked exception) Thrown if <TT>out</TT> is null.
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*/
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public ChunkOutputStream
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(OutputStream out)
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{
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this.out = new DataOutputStream (out);
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}
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// Exported operations.
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/**
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* Write the PNG file signature to this chunk output stream.
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*
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* @exception IOException
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* Thrown if an I/O error occurred.
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*/
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public void writeSignature()
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throws IOException
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{
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out.writeByte (137);
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out.writeByte (80);
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out.writeByte (78);
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out.writeByte (71);
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out.writeByte (13);
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out.writeByte (10);
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out.writeByte (26);
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out.writeByte (10);
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}
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/**
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* Write the given chunk to this chunk output stream.
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*
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* @param chunk Chunk.
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*
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* @exception IOException
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* Thrown if an I/O error occurred.
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*/
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public void write
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(Chunk chunk)
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throws IOException
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{
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chunk.write (out);
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}
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/**
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* Flush this chunk output stream.
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*
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* @exception IOException
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* Thrown if an I/O error occurred.
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*/
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public void flush()
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throws IOException
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{
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out.flush();
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}
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/**
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* Close this chunk output stream.
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*
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* @exception IOException
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* Thrown if an I/O error occurred.
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*/
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public void close()
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throws IOException
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{
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out.close();
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}
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}
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