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Add additional stream filters to apply
* ASCII85Decode * ASCIIHexDecode * RunLengthDecode
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‎src/main/java/com/itextpdf/rups/io/encoders/ASCII85CompressionStrategy.java‎

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/*
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This file is part of the iText (R) project.
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Copyright (c) 1998-2025 Apryse Group NV
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Authors: Apryse Software.
5+
6+
This program is free software; you can redistribute it and/or modify
7+
it under the terms of the GNU Affero General Public License version 3
8+
as published by the Free Software Foundation with the addition of the
9+
following permission added to Section 15 as permitted in Section 7(a):
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FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
11+
APRYSE GROUP. APRYSE GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
12+
OF THIRD PARTY RIGHTS
13+
14+
This program is distributed in the hope that it will be useful, but
15+
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16+
or FITNESS FOR A PARTICULAR PURPOSE.
17+
See the GNU Affero General Public License for more details.
18+
You should have received a copy of the GNU Affero General Public License
19+
along with this program; if not, see http://www.gnu.org/licenses or write to
20+
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21+
Boston, MA, 02110-1301 USA, or download the license from the following URL:
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http://itextpdf.com/terms-of-use/
23+
24+
The interactive user interfaces in modified source and object code versions
25+
of this program must display Appropriate Legal Notices, as required under
26+
Section 5 of the GNU Affero General Public License.
27+
28+
In accordance with Section 7(b) of the GNU Affero General Public License,
29+
a covered work must retain the producer line in every PDF that is created
30+
or manipulated using iText.
31+
32+
You can be released from the requirements of the license by purchasing
33+
a commercial license. Buying such a license is mandatory as soon as you
34+
develop commercial activities involving the iText software without
35+
disclosing the source code of your own applications.
36+
These activities include: offering paid services to customers as an ASP,
37+
serving PDFs on the fly in a web application, shipping iText with a closed
38+
source product.
39+
40+
For more information, please contact iText Software Corp. at this
41+
address: sales@itextpdf.com
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*/
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package com.itextpdf.rups.io.encoders;
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import com.itextpdf.kernel.pdf.IStreamCompressionStrategy;
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import com.itextpdf.kernel.pdf.PdfName;
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import com.itextpdf.kernel.pdf.PdfObject;
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import com.itextpdf.kernel.pdf.PdfStream;
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import java.io.OutputStream;
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public class ASCII85CompressionStrategy implements IStreamCompressionStrategy {
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@Override
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public PdfName getFilterName() {
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return PdfName.ASCII85Decode;
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}
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@Override
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public PdfObject getDecodeParams() {
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return null;
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}
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@Override
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public OutputStream createNewOutputStream(OutputStream original, PdfStream stream) {
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return new ASCII85OutputStream(original);
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}
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}

‎src/main/java/com/itextpdf/rups/io/encoders/ASCII85OutputStream.java‎

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/*
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This file is part of the iText (R) project.
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Copyright (c) 1998-2025 Apryse Group NV
4+
Authors: Apryse Software.
5+
6+
This program is free software; you can redistribute it and/or modify
7+
it under the terms of the GNU Affero General Public License version 3
8+
as published by the Free Software Foundation with the addition of the
9+
following permission added to Section 15 as permitted in Section 7(a):
10+
FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
11+
APRYSE GROUP. APRYSE GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
12+
OF THIRD PARTY RIGHTS
13+
14+
This program is distributed in the hope that it will be useful, but
15+
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16+
or FITNESS FOR A PARTICULAR PURPOSE.
17+
See the GNU Affero General Public License for more details.
18+
You should have received a copy of the GNU Affero General Public License
19+
along with this program; if not, see http://www.gnu.org/licenses or write to
20+
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21+
Boston, MA, 02110-1301 USA, or download the license from the following URL:
22+
http://itextpdf.com/terms-of-use/
23+
24+
The interactive user interfaces in modified source and object code versions
25+
of this program must display Appropriate Legal Notices, as required under
26+
Section 5 of the GNU Affero General Public License.
27+
28+
In accordance with Section 7(b) of the GNU Affero General Public License,
29+
a covered work must retain the producer line in every PDF that is created
30+
or manipulated using iText.
31+
32+
You can be released from the requirements of the license by purchasing
33+
a commercial license. Buying such a license is mandatory as soon as you
34+
develop commercial activities involving the iText software without
35+
disclosing the source code of your own applications.
36+
These activities include: offering paid services to customers as an ASP,
37+
serving PDFs on the fly in a web application, shipping iText with a closed
38+
source product.
39+
40+
For more information, please contact iText Software Corp. at this
41+
address: sales@itextpdf.com
42+
*/
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package com.itextpdf.rups.io.encoders;
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import com.itextpdf.io.source.IFinishable;
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import java.io.FilterOutputStream;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.util.Arrays;
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import java.util.concurrent.atomic.AtomicBoolean;
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public class ASCII85OutputStream extends FilterOutputStream implements IFinishable {
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private static final int OFFSET = 33;
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private static final int BASE = 85;
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private static final int INPUT_LENGTH = 4;
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private static final int OUTPUT_LENGTH = 5;
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private static final byte ALL_ZEROS_MARKER = 'z';
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private static final byte[] EOD = new byte[] {'~', '>'};
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private final byte[] buffer = new byte[OUTPUT_LENGTH];
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private int inputOr = 0;
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private int inputCursor = 0;
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private final AtomicBoolean finished = new AtomicBoolean(false);
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public ASCII85OutputStream(OutputStream out) {
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super(out);
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}
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@Override
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public void write(int b) throws IOException {
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final int value = b & 0xFF;
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buffer[inputCursor] = (byte) value;
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inputOr |= value;
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++inputCursor;
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writeBufferIfFull();
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}
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@Override
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public void write(byte[] b, int off, int len) throws IOException {
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for (int i = off; i < off + len; ++i) {
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write(b[i]);
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}
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}
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@Override
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public void close() throws IOException {
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finish();
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super.close();
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}
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@Override
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public void finish() throws IOException {
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if (finished.getAndSet(true)) {
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return;
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}
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// Writing the remainder
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if (inputCursor > 0) {
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Arrays.fill(buffer, inputCursor, INPUT_LENGTH, (byte) 0);
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convertBuffer();
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out.write(buffer, 0, inputCursor + 1);
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resetBuffer();
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}
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out.write(EOD);
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flush();
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}
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private void writeBufferIfFull() throws IOException {
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if (inputCursor < INPUT_LENGTH) {
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return;
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}
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// Special case, if all zeros
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if (inputOr == 0) {
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out.write(ALL_ZEROS_MARKER);
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} else {
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convertBuffer();
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out.write(buffer);
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}
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resetBuffer();
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}
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private void resetBuffer() {
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inputOr = 0;
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inputCursor = 0;
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}
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private void convertBuffer() {
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long num = ((buffer[0] & 0xFFL) << 24)
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| ((buffer[1] & 0xFFL) << 16)
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| ((buffer[2] & 0xFFL) << 8)
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| (buffer[3] & 0xFFL);
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for (int i = OUTPUT_LENGTH - 1; i >= 0; --i) {
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buffer[i] = (byte) (OFFSET + (num % BASE));
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num /= BASE;
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}
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}
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}

‎src/main/java/com/itextpdf/rups/io/encoders/ASCIIHexCompressionStrategy.java‎

Lines changed: 67 additions & 0 deletions
Original file line numberDiff line numberDiff line change
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1+
/*
2+
This file is part of the iText (R) project.
3+
Copyright (c) 1998-2025 Apryse Group NV
4+
Authors: Apryse Software.
5+
6+
This program is free software; you can redistribute it and/or modify
7+
it under the terms of the GNU Affero General Public License version 3
8+
as published by the Free Software Foundation with the addition of the
9+
following permission added to Section 15 as permitted in Section 7(a):
10+
FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
11+
APRYSE GROUP. APRYSE GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
12+
OF THIRD PARTY RIGHTS
13+
14+
This program is distributed in the hope that it will be useful, but
15+
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16+
or FITNESS FOR A PARTICULAR PURPOSE.
17+
See the GNU Affero General Public License for more details.
18+
You should have received a copy of the GNU Affero General Public License
19+
along with this program; if not, see http://www.gnu.org/licenses or write to
20+
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21+
Boston, MA, 02110-1301 USA, or download the license from the following URL:
22+
http://itextpdf.com/terms-of-use/
23+
24+
The interactive user interfaces in modified source and object code versions
25+
of this program must display Appropriate Legal Notices, as required under
26+
Section 5 of the GNU Affero General Public License.
27+
28+
In accordance with Section 7(b) of the GNU Affero General Public License,
29+
a covered work must retain the producer line in every PDF that is created
30+
or manipulated using iText.
31+
32+
You can be released from the requirements of the license by purchasing
33+
a commercial license. Buying such a license is mandatory as soon as you
34+
develop commercial activities involving the iText software without
35+
disclosing the source code of your own applications.
36+
These activities include: offering paid services to customers as an ASP,
37+
serving PDFs on the fly in a web application, shipping iText with a closed
38+
source product.
39+
40+
For more information, please contact iText Software Corp. at this
41+
address: sales@itextpdf.com
42+
*/
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package com.itextpdf.rups.io.encoders;
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import com.itextpdf.kernel.pdf.IStreamCompressionStrategy;
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import com.itextpdf.kernel.pdf.PdfName;
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import com.itextpdf.kernel.pdf.PdfObject;
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import com.itextpdf.kernel.pdf.PdfStream;
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import java.io.OutputStream;
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public class ASCIIHexCompressionStrategy implements IStreamCompressionStrategy {
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@Override
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public PdfName getFilterName() {
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return PdfName.ASCIIHexDecode;
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}
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@Override
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public PdfObject getDecodeParams() {
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return null;
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}
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@Override
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public OutputStream createNewOutputStream(OutputStream original, PdfStream stream) {
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return new ASCIIHexOutputStream(original);
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}
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}

‎src/main/java/com/itextpdf/rups/io/encoders/ASCIIHexOutputStream.java‎

Lines changed: 92 additions & 0 deletions
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@@ -0,0 +1,92 @@
1+
/*
2+
This file is part of the iText (R) project.
3+
Copyright (c) 1998-2025 Apryse Group NV
4+
Authors: Apryse Software.
5+
6+
This program is free software; you can redistribute it and/or modify
7+
it under the terms of the GNU Affero General Public License version 3
8+
as published by the Free Software Foundation with the addition of the
9+
following permission added to Section 15 as permitted in Section 7(a):
10+
FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
11+
APRYSE GROUP. APRYSE GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
12+
OF THIRD PARTY RIGHTS
13+
14+
This program is distributed in the hope that it will be useful, but
15+
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16+
or FITNESS FOR A PARTICULAR PURPOSE.
17+
See the GNU Affero General Public License for more details.
18+
You should have received a copy of the GNU Affero General Public License
19+
along with this program; if not, see http://www.gnu.org/licenses or write to
20+
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21+
Boston, MA, 02110-1301 USA, or download the license from the following URL:
22+
http://itextpdf.com/terms-of-use/
23+
24+
The interactive user interfaces in modified source and object code versions
25+
of this program must display Appropriate Legal Notices, as required under
26+
Section 5 of the GNU Affero General Public License.
27+
28+
In accordance with Section 7(b) of the GNU Affero General Public License,
29+
a covered work must retain the producer line in every PDF that is created
30+
or manipulated using iText.
31+
32+
You can be released from the requirements of the license by purchasing
33+
a commercial license. Buying such a license is mandatory as soon as you
34+
develop commercial activities involving the iText software without
35+
disclosing the source code of your own applications.
36+
These activities include: offering paid services to customers as an ASP,
37+
serving PDFs on the fly in a web application, shipping iText with a closed
38+
source product.
39+
40+
For more information, please contact iText Software Corp. at this
41+
address: sales@itextpdf.com
42+
*/
43+
package com.itextpdf.rups.io.encoders;
44+
45+
import com.itextpdf.io.source.IFinishable;
46+
47+
import java.io.FilterOutputStream;
48+
import java.io.IOException;
49+
import java.io.OutputStream;
50+
import java.util.concurrent.atomic.AtomicBoolean;
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public class ASCIIHexOutputStream extends FilterOutputStream implements IFinishable {
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private static final byte EOD = '>';
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private static final byte[] CHAR_MAP = {
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'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
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};
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private final AtomicBoolean finished = new AtomicBoolean(false);
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public ASCIIHexOutputStream(OutputStream out) {
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super(out);
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}
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@Override
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public void write(int b) throws IOException {
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final int value = (b & 0xFF);
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out.write(CHAR_MAP[value >> 4]);
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out.write(CHAR_MAP[value & 0x0F]);
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}
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@Override
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public void write(byte[] b, int off, int len) throws IOException {
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for (int i = off; i < off + len; ++i) {
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write(b[i]);
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}
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}
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@Override
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public void close() throws IOException {
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finish();
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super.close();
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}
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@Override
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public void finish() throws IOException {
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if (finished.getAndSet(true)) {
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return;
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}
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out.write(EOD);
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flush();
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}
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}

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