+++ /dev/null
-/*
- * $Id: ASCII85OutputStream.java,v 1.4 2003/03/07 09:46:30 jeremias Exp $
- * ============================================================================
- * The Apache Software License, Version 1.1
- * ============================================================================
- *
- * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modifica-
- * tion, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * 3. The end-user documentation included with the redistribution, if any, must
- * include the following acknowledgment: "This product includes software
- * developed by the Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself, if
- * and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "FOP" and "Apache Software Foundation" must not be used to
- * endorse or promote products derived from this software without prior
- * written permission. For written permission, please contact
- * apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache", nor may
- * "Apache" appear in their name, without prior written permission of the
- * Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
- * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * ============================================================================
- *
- * This software consists of voluntary contributions made by many individuals
- * on behalf of the Apache Software Foundation and was originally created by
- * James Tauber <jtauber@jtauber.com>. For more information on the Apache
- * Software Foundation, please see <http://www.apache.org/>.
- */
-package org.apache.fop.render.ps;
-
-import java.io.OutputStream;
-import java.io.FilterOutputStream;
-import java.io.IOException;
-
-/**
- * This class applies a ASCII85 encoding to the stream.
- *
- * @author <a href="mailto:jeremias.maerki@outline.ch">Jeremias Maerki</a>
- * @version $Id: ASCII85OutputStream.java,v 1.4 2003/03/07 09:46:30 jeremias Exp $
- */
-public class ASCII85OutputStream extends FilterOutputStream
- implements Finalizable {
-
- private static final int ZERO = 0x7A; //"z"
- private static final byte[] ZERO_ARRAY = {(byte)ZERO};
- private static final int START = 0x21; //"!"
- private static final int EOL = 0x0A; //"\n"
- private static final byte[] EOD = {0x7E, 0x3E}; //"~>"
-
- private static final long BASE85_4 = 85;
- private static final long BASE85_3 = BASE85_4 * BASE85_4;
- private static final long BASE85_2 = BASE85_3 * BASE85_4;
- private static final long BASE85_1 = BASE85_2 * BASE85_4;
-
- private static final boolean DEBUG = false;
-
- private int pos = 0;
- private long buffer = 0;
- private int posinline = 0;
- private int bw = 0;
-
-
- /** @see java.io.FilterOutputStream **/
- public ASCII85OutputStream(OutputStream out) {
- super(out);
- }
-
-
- /** @see java.io.FilterOutputStream **/
- public void write(int b) throws IOException {
- if (pos == 0) {
- buffer += (b << 24) & 0xff000000L;
- } else if (pos == 1) {
- buffer += (b << 16) & 0xff0000L;
- } else if (pos == 2) {
- buffer += (b << 8) & 0xff00L;
- } else {
- buffer += b & 0xffL;
- }
- pos++;
-
- if (pos > 3) {
- checkedWrite(convertWord(buffer));
- buffer = 0;
- pos = 0;
- }
- }
-
-
- private void checkedWrite(int b) throws IOException {
- if (posinline == 80) {
- out.write(EOL); bw++;
- posinline = 0;
- }
- checkedWrite(b);
- posinline++;
- bw++;
- }
-
-
- private void checkedWrite(byte[] buf) throws IOException {
- checkedWrite(buf, buf.length);
- }
-
-
- private void checkedWrite(byte[] buf , int len) throws IOException {
- if (posinline + len > 80) {
- int firstpart = len - (posinline + len - 80);
- if (firstpart > 0) {
- out.write(buf, 0, firstpart);
- }
- out.write(EOL); bw++;
- int rest = len - firstpart;
- if (rest > 0) {
- out.write(buf, firstpart, rest);
- }
- posinline = rest;
- } else {
- out.write(buf, 0, len);
- posinline += len;
- }
- bw += len;
- }
-
-
- /**
- * This converts a 32 bit value (4 bytes) into 5 bytes using base 85.
- * each byte in the result starts with zero at the '!' character so
- * the resulting base85 number fits into printable ascii chars
- *
- * @param word the 32 bit unsigned (hence the long datatype) word
- * @return 5 bytes (or a single byte of the 'z' character for word
- * values of 0)
- */
- private byte[] convertWord(long word) {
- word = word & 0xffffffff;
-
- if (word == 0) {
- return ZERO_ARRAY;
- } else {
- if (word < 0) {
- word = -word;
- }
- byte c1 = (byte)((word / BASE85_1) & 0xFF);
- byte c2 = (byte)(((word - (c1 * BASE85_1)) / BASE85_2) & 0xFF);
- byte c3 =
- (byte)(((word - (c1 * BASE85_1) - (c2 * BASE85_2))
- / BASE85_3) & 0xFF);
- byte c4 =
- (byte)(((word - (c1 * BASE85_1) - (c2 * BASE85_2) - (c3 * BASE85_3))
- / BASE85_4) & 0xFF);
- byte c5 =
- (byte)(((word - (c1 * BASE85_1) - (c2 * BASE85_2) - (c3 * BASE85_3)
- - (c4 * BASE85_4)))
- & 0xFF);
-
- byte[] ret = {
- (byte)(c1 + START), (byte)(c2 + START),
- (byte)(c3 + START), (byte)(c4 + START),
- (byte)(c5 + START)
- };
-
- if (DEBUG) {
- for (int i = 0; i < ret.length; i++) {
- if (ret[i] < 33 || ret[i] > 117) {
- System.out.println("Illegal char value "
- + new Integer(ret[i]));
- }
- }
- }
- return ret;
- }
- }
-
-
- /** @see org.apache.fop.render.ps.Finalizable **/
- public void finalizeStream() throws IOException {
- // now take care of the trailing few bytes.
- // with n leftover bytes, we append 0 bytes to make a full group of 4
- // then convert like normal (except not applying the special zero rule)
- // and write out the first n+1 bytes from the result
- if (pos > 0) {
- int rest = pos;
- /*
- byte[] lastdata = new byte[4];
- int i = 0;
- for (int j = 0; j < 4; j++) {
- if (j < rest) {
- lastdata[j] = data[i++];
- } else {
- lastdata[j] = 0;
- }
- }
-
- long val = ((lastdata[0] << 24) & 0xff000000L)
- + ((lastdata[1] << 16) & 0xff0000L)
- + ((lastdata[2] << 8) & 0xff00L)
- + (lastdata[3] & 0xffL);
- */
-
- byte[] conv;
- // special rule for handling zeros at the end
- if (buffer != 0) {
- conv = convertWord(buffer);
- } else {
- conv = new byte[5];
- for (int j = 0; j < 5; j++) {
- conv[j] = (byte)'!';
- }
- }
- // assert rest+1 <= 5
- checkedWrite(conv, rest + 1);
- }
- // finally write the two character end of data marker
- checkedWrite(EOD);
-
- flush();
- if (out instanceof Finalizable) {
- ((Finalizable)out).finalizeStream();
- }
- }
-
-
- /** @see java.io.FilterOutputStream **/
- public void close() throws IOException {
- finalizeStream();
- super.close();
- }
-
-}
-
-
+++ /dev/null
-/*
- * $Id: ASCIIHexOutputStream.java,v 1.4 2003/03/07 09:46:30 jeremias Exp $
- * ============================================================================
- * The Apache Software License, Version 1.1
- * ============================================================================
- *
- * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modifica-
- * tion, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * 3. The end-user documentation included with the redistribution, if any, must
- * include the following acknowledgment: "This product includes software
- * developed by the Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself, if
- * and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "FOP" and "Apache Software Foundation" must not be used to
- * endorse or promote products derived from this software without prior
- * written permission. For written permission, please contact
- * apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache", nor may
- * "Apache" appear in their name, without prior written permission of the
- * Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
- * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * ============================================================================
- *
- * This software consists of voluntary contributions made by many individuals
- * on behalf of the Apache Software Foundation and was originally created by
- * James Tauber <jtauber@jtauber.com>. For more information on the Apache
- * Software Foundation, please see <http://www.apache.org/>.
- */
-package org.apache.fop.render.ps;
-
-import java.io.OutputStream;
-import java.io.FilterOutputStream;
-import java.io.IOException;
-
-/**
- * This class applies a ASCII Hex encoding to the stream.
- *
- * @author <a href="mailto:jeremias.maerki@outline.ch">Jeremias Maerki</a>
- * @version $Id: ASCIIHexOutputStream.java,v 1.4 2003/03/07 09:46:30 jeremias Exp $
- */
-public class ASCIIHexOutputStream extends FilterOutputStream
- implements Finalizable {
-
- private static final int EOL = 0x0A; //"\n"
- private static final int EOD = 0x3E; //">"
- private static final int ZERO = 0x30; //"0"
- private static final int NINE = 0x39; //"9"
- private static final int A = 0x41; //"A"
- private static final int ADIFF = A - NINE - 1;
-
- private int posinline = 0;
-
-
- /** @see java.io.FilterOutputStream **/
- public ASCIIHexOutputStream(OutputStream out) {
- super(out);
- }
-
-
- /** @see java.io.FilterOutputStream **/
- public void write(int b) throws IOException {
- b &= 0xFF;
-
- int digit1 = ((b & 0xF0) >> 4) + ZERO;
- if (digit1 > NINE) {
- digit1 += ADIFF;
- }
- out.write(digit1);
-
- int digit2 = (b & 0x0F) + ZERO;
- if (digit2 > NINE) {
- digit2 += ADIFF;
- }
- out.write(digit2);
-
- posinline++;
- checkLineWrap();
- }
-
-
- private void checkLineWrap() throws IOException {
- //Maximum line length is 80 characters
- if (posinline >= 40) {
- out.write(EOL);
- posinline = 0;
- }
- }
-
-
- /** @see org.apache.fop.render.ps.Finalizable **/
- public void finalizeStream() throws IOException {
- checkLineWrap();
- //Write closing character ">"
- super.write(EOD);
-
- flush();
- if (out instanceof Finalizable) {
- ((Finalizable) out).finalizeStream();
- }
- }
-
-
- /** @see java.io.FilterOutputStream **/
- public void close() throws IOException {
- finalizeStream();
- super.close();
- }
-
-
-}
-
-
+++ /dev/null
-/*
- * $Id: Finalizable.java,v 1.4 2003/03/07 09:46:30 jeremias Exp $
- * ============================================================================
- * The Apache Software License, Version 1.1
- * ============================================================================
- *
- * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modifica-
- * tion, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * 3. The end-user documentation included with the redistribution, if any, must
- * include the following acknowledgment: "This product includes software
- * developed by the Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself, if
- * and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "FOP" and "Apache Software Foundation" must not be used to
- * endorse or promote products derived from this software without prior
- * written permission. For written permission, please contact
- * apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache", nor may
- * "Apache" appear in their name, without prior written permission of the
- * Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
- * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * ============================================================================
- *
- * This software consists of voluntary contributions made by many individuals
- * on behalf of the Apache Software Foundation and was originally created by
- * James Tauber <jtauber@jtauber.com>. For more information on the Apache
- * Software Foundation, please see <http://www.apache.org/>.
- */
-package org.apache.fop.render.ps;
-
-/**
- * This interface is used for special FilteredOutputStream classes that won't
- * be closed (since this causes the target OutputStream to be closed, too) but
- * where flush() is not enough, for example because a final marker has to be
- * written to the target stream.
- *
- * @author <a href="mailto:jeremias.maerki@outline.ch">Jeremias Maerki</a>
- * @version $Id: Finalizable.java,v 1.4 2003/03/07 09:46:30 jeremias Exp $
- */
-public interface Finalizable {
-
- /**
- * This method can be called instead of close() on a subclass of
- * FilteredOutputStream when a final marker has to be written to the target
- * stream, but close() cannot be called.
- *
- * @exception java.io.IOException In case of an IO problem
- */
- void finalizeStream()
- throws java.io.IOException;
-
-}
+++ /dev/null
-/*
- * $Id: FlateEncodeOutputStream.java,v 1.4 2003/03/07 09:46:30 jeremias Exp $
- * ============================================================================
- * The Apache Software License, Version 1.1
- * ============================================================================
- *
- * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modifica-
- * tion, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * 3. The end-user documentation included with the redistribution, if any, must
- * include the following acknowledgment: "This product includes software
- * developed by the Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself, if
- * and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "FOP" and "Apache Software Foundation" must not be used to
- * endorse or promote products derived from this software without prior
- * written permission. For written permission, please contact
- * apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache", nor may
- * "Apache" appear in their name, without prior written permission of the
- * Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
- * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * ============================================================================
- *
- * This software consists of voluntary contributions made by many individuals
- * on behalf of the Apache Software Foundation and was originally created by
- * James Tauber <jtauber@jtauber.com>. For more information on the Apache
- * Software Foundation, please see <http://www.apache.org/>.
- */
-package org.apache.fop.render.ps;
-
-import java.io.OutputStream;
-import java.io.IOException;
-
-/**
- * This class applies a FlateEncode filter to the stream. It is basically the
- * normal DeflaterOutputStream except now also implementing the Finalizable
- * interface.
- *
- * @author <a href="mailto:jeremias.maerki@outline.ch">Jeremias Maerki</a>
- * @version $Id: FlateEncodeOutputStream.java,v 1.4 2003/03/07 09:46:30 jeremias Exp $
- */
-public class FlateEncodeOutputStream extends java.util.zip.DeflaterOutputStream
- implements Finalizable {
-
-
- /** @see java.util.zip.DeflaterOutputStream **/
- public FlateEncodeOutputStream(OutputStream out) {
- super(out);
- }
-
-
- /** @see org.apache.fop.render.ps.Finalizable **/
- public void finalizeStream() throws IOException {
- finish();
- flush();
- if (out instanceof Finalizable) {
- ((Finalizable)out).finalizeStream();
- }
- }
-
-}
-
-
+++ /dev/null
-/*
- * $Id: RunLengthEncodeOutputStream.java,v 1.3 2003/03/07 09:46:30 jeremias Exp $
- * ============================================================================
- * The Apache Software License, Version 1.1
- * ============================================================================
- *
- * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modifica-
- * tion, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * 3. The end-user documentation included with the redistribution, if any, must
- * include the following acknowledgment: "This product includes software
- * developed by the Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself, if
- * and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "FOP" and "Apache Software Foundation" must not be used to
- * endorse or promote products derived from this software without prior
- * written permission. For written permission, please contact
- * apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache", nor may
- * "Apache" appear in their name, without prior written permission of the
- * Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
- * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * ============================================================================
- *
- * This software consists of voluntary contributions made by many individuals
- * on behalf of the Apache Software Foundation and was originally created by
- * James Tauber <jtauber@jtauber.com>. For more information on the Apache
- * Software Foundation, please see <http://www.apache.org/>.
- */
-package org.apache.fop.render.ps;
-
-import java.io.FilterOutputStream;
-import java.io.OutputStream;
-import java.io.IOException;
-
-/**
- * This class applies a RunLengthEncode filter to the stream.
- *
- * @author <a href="mailto:smwolke@geistig.com">Stephen Wolke</a>
- * @version $Id: RunLengthEncodeOutputStream.java,v 1.3 2003/03/07 09:46:30 jeremias Exp $
- */
-public class RunLengthEncodeOutputStream extends FilterOutputStream
- implements Finalizable {
-
- private static final int MAX_SEQUENCE_COUNT = 127;
- private static final int END_OF_DATA = 128;
- private static final int BYTE_MAX = 256;
-
- private static final int NOT_IDENTIFY_SEQUENCE = 0;
- private static final int START_SEQUENCE = 1;
- private static final int IN_SEQUENCE = 2;
- private static final int NOT_IN_SEQUENCE = 3;
-
- private int runCount = 0;
- private int isSequence = NOT_IDENTIFY_SEQUENCE;
- private byte[] runBuffer = new byte[MAX_SEQUENCE_COUNT + 1];
-
-
- /** @see java.io.FilterOutputStream **/
- public RunLengthEncodeOutputStream(OutputStream out) {
- super(out);
- }
-
-
- /** @see java.io.FilterOutputStream **/
- public void write(byte b)
- throws java.io.IOException {
- runBuffer[runCount] = b;
-
- switch (runCount) {
- case 0:
- runCount = 0;
- isSequence = NOT_IDENTIFY_SEQUENCE;
- runCount++;
- break;
- case 1:
- if (runBuffer[runCount] != runBuffer[runCount - 1]) {
- isSequence = NOT_IN_SEQUENCE;
- }
- runCount++;
- break;
- case 2:
- if (runBuffer[runCount] != runBuffer[runCount - 1]) {
- isSequence = NOT_IN_SEQUENCE;
- } else {
- if (isSequence == NOT_IN_SEQUENCE) {
- isSequence = START_SEQUENCE;
- } else {
- isSequence = IN_SEQUENCE;
- }
- }
- runCount++;
- break;
- case MAX_SEQUENCE_COUNT:
- if (isSequence == IN_SEQUENCE) {
- out.write(BYTE_MAX - (MAX_SEQUENCE_COUNT - 1));
- out.write(runBuffer[runCount - 1]);
- runBuffer[0] = runBuffer[runCount];
- runCount = 1;
- } else {
- out.write(MAX_SEQUENCE_COUNT);
- out.write(runBuffer, 0, runCount + 1);
- runCount = 0;
- }
- isSequence = NOT_IDENTIFY_SEQUENCE;
- break;
- default:
- switch (isSequence) {
- case IN_SEQUENCE:
- if (runBuffer[runCount] != runBuffer[runCount - 1]) {
- out.write(BYTE_MAX - (runCount - 1));
- out.write(runBuffer[runCount - 1]);
- runBuffer[0] = runBuffer[runCount];
- runCount = 1;
- isSequence = NOT_IDENTIFY_SEQUENCE;
- break;
- }
- runCount++;
- break;
- case NOT_IN_SEQUENCE:
- if (runBuffer[runCount] == runBuffer[runCount - 1]) {
- isSequence = START_SEQUENCE;
- }
- runCount++;
- break;
- case START_SEQUENCE:
- if (runBuffer[runCount] == runBuffer[runCount - 1]) {
- out.write(runCount - 3);
- out.write(runBuffer, 0, runCount - 2);
- runBuffer[0] = runBuffer[runCount];
- runBuffer[1] = runBuffer[runCount];
- runBuffer[2] = runBuffer[runCount];
- runCount = 3;
- isSequence = IN_SEQUENCE;
- break;
- } else {
- isSequence = NOT_IN_SEQUENCE;
- runCount++;
- break;
- }
- }
- }
- }
-
-
- /** @see java.io.FilterOutputStream **/
- public void write(byte[] b)
- throws IOException {
-
- for (int i = 0; i < b.length; i++) {
- this.write(b[i]);
- }
- }
-
-
- /** @see java.io.FilterOutputStream **/
- public void write(byte[] b, int off, int len)
- throws IOException {
-
- for (int i = 0; i < len; i++) {
- this.write(b[off + i]);
- }
- }
-
-
- /** @see org.apache.fop.render.ps.Finalizable **/
- public void finalizeStream()
- throws IOException {
- switch (isSequence) {
- case IN_SEQUENCE:
- out.write(BYTE_MAX - (runCount - 1));
- out.write(runBuffer[runCount - 1]);
- break;
- default:
- out.write(runCount - 1);
- out.write(runBuffer, 0, runCount);
- }
-
- out.write(END_OF_DATA);
-
- flush();
- if (out instanceof Finalizable) {
- ((Finalizable) out).finalizeStream();
- }
- }
-
-
- /** @see java.io.FilterOutputStream **/
- public void close()
- throws IOException {
- finalizeStream();
- super.close();
- }
-
-}
-
projects / xmlgraphics-fop.git / commitdiff