diff options
Diffstat (limited to 'src/main/java/com/kitfox/svg/xml/cpx/CPXOutputStream.java')
| -rw-r--r-- | src/main/java/com/kitfox/svg/xml/cpx/CPXOutputStream.java | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/src/main/java/com/kitfox/svg/xml/cpx/CPXOutputStream.java b/src/main/java/com/kitfox/svg/xml/cpx/CPXOutputStream.java new file mode 100644 index 0000000..f129cfb --- /dev/null +++ b/src/main/java/com/kitfox/svg/xml/cpx/CPXOutputStream.java @@ -0,0 +1,174 @@ +/*
+ * CPXOutputStream.java
+ *
+ *
+ * The Salamander Project - 2D and 3D graphics libraries in Java
+ * Copyright (C) 2004 Mark McKay
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Mark McKay can be contacted at mark@kitfox.com. Salamander and other
+ * projects can be found at http://www.kitfox.com
+ *
+ * Created on February 12, 2004, 12:50 PM
+ */
+
+package com.kitfox.svg.xml.cpx;
+
+import java.io.*;
+import java.util.zip.*;
+import java.security.*;
+import javax.crypto.*;
+
+/**
+ * @author Mark McKay
+ * @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
+ */
+public class CPXOutputStream extends FilterOutputStream implements CPXConsts {
+
+ Deflater deflater = new Deflater(Deflater.BEST_COMPRESSION);
+
+ /** Creates a new instance of CPXOutputStream */
+ public CPXOutputStream(OutputStream os) throws IOException {
+ super(os);
+
+ //Write magic number
+ os.write(MAGIC_NUMBER);
+ }
+
+ /**
+ * Writes the specified <code>byte</code> to this output stream.
+ * <p>
+ * The <code>write</code> method of <code>FilterOutputStream</code>
+ * calls the <code>write</code> method of its underlying output stream,
+ * that is, it performs <tt>out.write(b)</tt>.
+ * <p>
+ * Implements the abstract <tt>write</tt> method of <tt>OutputStream</tt>.
+ *
+ * @param b the <code>byte</code>.
+ * @exception IOException if an I/O error occurs.
+ */
+ public void write(int b) throws IOException {
+ final byte[] buf = new byte[1];
+ buf[0] = (byte)b;
+ write(buf, 0, 1);
+ }
+
+ /**
+ * Writes <code>b.length</code> bytes to this output stream.
+ * <p>
+ * The <code>write</code> method of <code>FilterOutputStream</code>
+ * calls its <code>write</code> method of three arguments with the
+ * arguments <code>b</code>, <code>0</code>, and
+ * <code>b.length</code>.
+ * <p>
+ * Note that this method does not call the one-argument
+ * <code>write</code> method of its underlying stream with the single
+ * argument <code>b</code>.
+ *
+ * @param b the data to be written.
+ * @exception IOException if an I/O error occurs.
+ * @see java.io.FilterOutputStream#write(byte[], int, int)
+ */
+ public void write(byte b[]) throws IOException {
+ write(b, 0, b.length);
+ }
+
+ byte[] deflateBuffer = new byte[2048];
+
+ /**
+ * Writes <code>len</code> bytes from the specified
+ * <code>byte</code> array starting at offset <code>off</code> to
+ * this output stream.
+ * <p>
+ * The <code>write</code> method of <code>FilterOutputStream</code>
+ * calls the <code>write</code> method of one argument on each
+ * <code>byte</code> to output.
+ * <p>
+ * Note that this method does not call the <code>write</code> method
+ * of its underlying input stream with the same arguments. Subclasses
+ * of <code>FilterOutputStream</code> should provide a more efficient
+ * implementation of this method.
+ *
+ * @param b the data.
+ * @param off the start offset in the data.
+ * @param len the number of bytes to write.
+ * @exception IOException if an I/O error occurs.
+ * @see java.io.FilterOutputStream#write(int)
+ */
+ public void write(byte b[], int off, int len) throws IOException
+ {
+ deflater.setInput(b, off, len);
+
+ processAllData();
+ /*
+ int numDeflatedBytes;
+ while ((numDeflatedBytes = deflater.deflate(deflateBuffer)) != 0)
+ {
+// byte[] cipherBuf = cipher.update(deflateBuffer, 0, numDeflatedBytes);
+// out.write(cipherBytes);
+out.write(deflateBuffer, 0, numDeflatedBytes);
+ }
+ */
+ }
+
+ protected void processAllData() throws IOException
+ {
+ int numDeflatedBytes;
+ while ((numDeflatedBytes = deflater.deflate(deflateBuffer)) != 0)
+ {
+// byte[] cipherBuf = cipher.update(deflateBuffer, 0, numDeflatedBytes);
+// out.write(cipherBytes);
+out.write(deflateBuffer, 0, numDeflatedBytes);
+ }
+ }
+
+ /**
+ * Flushes this output stream and forces any buffered output bytes
+ * to be written out to the stream.
+ * <p>
+ * The <code>flush</code> method of <code>FilterOutputStream</code>
+ * calls the <code>flush</code> method of its underlying output stream.
+ *
+ * @exception IOException if an I/O error occurs.
+ * @see java.io.FilterOutputStream#out
+ */
+ public void flush() throws IOException {
+ out.flush();
+ }
+
+ /**
+ * Closes this output stream and releases any system resources
+ * associated with the stream.
+ * <p>
+ * The <code>close</code> method of <code>FilterOutputStream</code>
+ * calls its <code>flush</code> method, and then calls the
+ * <code>close</code> method of its underlying output stream.
+ *
+ * @exception IOException if an I/O error occurs.
+ * @see java.io.FilterOutputStream#flush()
+ * @see java.io.FilterOutputStream#out
+ */
+ public void close() throws IOException {
+ deflater.finish();
+ processAllData();
+
+ try {
+ flush();
+ } catch (IOException ignored) {
+ }
+ out.close();
+ }
+}
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