diff options
| author | tknall <tknall@7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c> | 2006-12-01 12:20:24 +0000 |
|---|---|---|
| committer | tknall <tknall@7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c> | 2006-12-01 12:20:24 +0000 |
| commit | 6025b6016517c6d898d8957d1d7e03ba71431912 (patch) | |
| tree | b15bd6fa5ffe9588a9bca3f2b8a7e358f83b6eba /src/main/java/org/pdfbox/filter | |
| parent | d2c77e820ab4aba8235d71275755021347b3ad10 (diff) | |
| download | pdf-as-3-6025b6016517c6d898d8957d1d7e03ba71431912.tar.gz pdf-as-3-6025b6016517c6d898d8957d1d7e03ba71431912.tar.bz2 pdf-as-3-6025b6016517c6d898d8957d1d7e03ba71431912.zip | |
Initial import of release 2.2.REL-2.2@923
git-svn-id: https://joinup.ec.europa.eu/svn/pdf-as/trunk@4 7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c
Diffstat (limited to 'src/main/java/org/pdfbox/filter')
| -rw-r--r-- | src/main/java/org/pdfbox/filter/ASCII85Filter.java | 103 | ||||
| -rw-r--r-- | src/main/java/org/pdfbox/filter/ASCIIHexFilter.java | 205 | ||||
| -rw-r--r-- | src/main/java/org/pdfbox/filter/CCITTFaxDecodeFilter.java | 735 | ||||
| -rw-r--r-- | src/main/java/org/pdfbox/filter/DCTFilter.java | 77 | ||||
| -rw-r--r-- | src/main/java/org/pdfbox/filter/Filter.java | 68 | ||||
| -rw-r--r-- | src/main/java/org/pdfbox/filter/FilterManager.java | 135 | ||||
| -rw-r--r-- | src/main/java/org/pdfbox/filter/FlateFilter.java | 303 | ||||
| -rw-r--r-- | src/main/java/org/pdfbox/filter/LZWDictionary.java | 215 | ||||
| -rw-r--r-- | src/main/java/org/pdfbox/filter/LZWFilter.java | 235 | ||||
| -rw-r--r-- | src/main/java/org/pdfbox/filter/LZWNode.java | 115 | ||||
| -rw-r--r-- | src/main/java/org/pdfbox/filter/RunLengthDecodeFilter.java | 126 | ||||
| -rw-r--r-- | src/main/java/org/pdfbox/filter/package.html | 9 |
12 files changed, 2326 insertions, 0 deletions
diff --git a/src/main/java/org/pdfbox/filter/ASCII85Filter.java b/src/main/java/org/pdfbox/filter/ASCII85Filter.java new file mode 100644 index 0000000..335208c --- /dev/null +++ b/src/main/java/org/pdfbox/filter/ASCII85Filter.java @@ -0,0 +1,103 @@ +/**
+ * Copyright (c) 2003, www.pdfbox.org
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, 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. Neither the name of pdfbox; nor the names of its
+ * contributors may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS 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 REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, 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.
+ *
+ * http://www.pdfbox.org
+ *
+ */
+package org.pdfbox.filter;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+import org.pdfbox.io.ASCII85InputStream;
+import org.pdfbox.io.ASCII85OutputStream;
+
+import org.pdfbox.cos.COSDictionary;
+
+/**
+ * This is the used for the ASCIIHexDecode filter.
+ *
+ * @author Ben Litchfield (ben@csh.rit.edu)
+ * @version $Revision: 1.6 $
+ */
+public class ASCII85Filter implements Filter
+{
+ /**
+ * This will decode some compressed data.
+ *
+ * @param compressedData The compressed byte stream.
+ * @param result The place to write the uncompressed byte stream.
+ * @param options The options to use to encode the data.
+ *
+ * @throws IOException If there is an error decompressing the stream.
+ */
+ public void decode( InputStream compressedData, OutputStream result, COSDictionary options ) throws IOException
+ {
+ ASCII85InputStream is = null;
+ try
+ {
+ is = new ASCII85InputStream(compressedData);
+ byte[] buffer = new byte[1024];
+ int amountRead = 0;
+ while( (amountRead = is.read( buffer, 0, 1024) ) != -1 )
+ {
+ result.write(buffer, 0, amountRead);
+ }
+ result.flush();
+ }
+ finally
+ {
+ if( is != null )
+ {
+ is.close();
+ }
+ }
+ }
+
+ /**
+ * This will encode some data.
+ *
+ * @param rawData The raw data to encode.
+ * @param result The place to write to encoded results to.
+ * @param options The options to use to encode the data.
+ *
+ * @throws IOException If there is an error compressing the stream.
+ */
+ public void encode( InputStream rawData, OutputStream result, COSDictionary options ) throws IOException
+ {
+ ASCII85OutputStream os = new ASCII85OutputStream(result);
+ byte[] buffer = new byte[1024];
+ int amountRead = 0;
+ while( (amountRead = rawData.read( buffer, 0, 1024 )) != -1 )
+ {
+ os.write( buffer, 0, amountRead );
+ }
+ os.close();
+ result.flush();
+ }
+}
\ No newline at end of file diff --git a/src/main/java/org/pdfbox/filter/ASCIIHexFilter.java b/src/main/java/org/pdfbox/filter/ASCIIHexFilter.java new file mode 100644 index 0000000..b3cf506 --- /dev/null +++ b/src/main/java/org/pdfbox/filter/ASCIIHexFilter.java @@ -0,0 +1,205 @@ +/**
+ * Copyright (c) 2003, www.pdfbox.org
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, 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. Neither the name of pdfbox; nor the names of its
+ * contributors may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS 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 REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, 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.
+ *
+ * http://www.pdfbox.org
+ *
+ */
+package org.pdfbox.filter;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+import org.pdfbox.cos.COSDictionary;
+
+import org.pdfbox.persistence.util.COSHEXTable;
+
+/**
+ * This is the used for the ASCIIHexDecode filter.
+ *
+ * @author Ben Litchfield (ben@csh.rit.edu)
+ * @version $Revision: 1.7 $
+ */
+public class ASCIIHexFilter implements Filter
+{
+ private static final int ASCII_ZERO = (int)'0';
+
+
+ /**
+ * This will decode some compressed data.
+ *
+ * @param compressedData The compressed byte stream.
+ * @param result The place to write the uncompressed byte stream.
+ * @param options The options to use to encode the data.
+ *
+ * @throws IOException If there is an error decompressing the stream.
+ */
+ public void decode( InputStream compressedData, OutputStream result, COSDictionary options ) throws IOException
+ {
+ int value =0;
+ int firstByte = 0;
+ int secondByte = 0;
+ while( (firstByte = compressedData.read()) != -1 )
+ {
+ value = REVERSE_HEX[firstByte] * 16;
+ secondByte = compressedData.read();
+ if( secondByte >= 0 )
+ {
+ value += REVERSE_HEX[ secondByte ];
+ }
+ result.write( value );
+ }
+ result.flush();
+ }
+
+ private static final int[] REVERSE_HEX =
+ {
+ -1, //0
+ -1, //1
+ -1, //2
+ -1, //3
+ -1, //4
+ -1, //5
+ -1, //6
+ -1, //7
+ -1, //8
+ -1, //9
+ -1, //10
+ -1, //11
+ -1, //12
+ -1, //13
+ -1, //14
+ -1, //15
+ -1, //16
+ -1, //17
+ -1, //18
+ -1, //19
+ -1, //20
+ -1, //21
+ -1, //22
+ -1, //23
+ -1, //24
+ -1, //25
+ -1, //26
+ -1, //27
+ -1, //28
+ -1, //29
+ -1, //30
+ -1, //31
+ -1, //32
+ -1, //33
+ -1, //34
+ -1, //35
+ -1, //36
+ -1, //37
+ -1, //38
+ -1, //39
+ -1, //40
+ -1, //41
+ -1, //42
+ -1, //43
+ -1, //44
+ -1, //45
+ -1, //46
+ -1, //47
+ 0, //48
+ 1, //49
+ 2, //50
+ 3, //51
+ 4, //52
+ 5, //53
+ 6, //54
+ 7, //55
+ 8, //56
+ 9, //57
+ -1, //58
+ -1, //59
+ -1, //60
+ -1, //61
+ -1, //62
+ -1, //63
+ -1, //64
+ 10, //65
+ 11, //66
+ 12, //67
+ 13, //68
+ 14, //69
+ 15, //70
+ -1, //71
+ -1, //72
+ -1, //73
+ -1, //74
+ -1, //75
+ -1, //76
+ -1, //77
+ -1, //78
+ -1, //79
+ -1, //80
+ -1, //81
+ -1, //82
+ -1, //83
+ -1, //84
+ -1, //85
+ -1, //86
+ -1, //87
+ -1, //88
+ -1, //89
+ -1, //90
+ -1, //91
+ -1, //92
+ -1, //93
+ -1, //94
+ -1, //95
+ -1, //96
+ 10, //97
+ 11, //98
+ 12, //99
+ 13, //100
+ 14, //101
+ 15, //102
+ };
+
+ /**
+ * This will encode some data.
+ *
+ * @param rawData The raw data to encode.
+ * @param result The place to write to encoded results to.
+ * @param options The options to use to encode the data.
+ *
+ * @throws IOException If there is an error compressing the stream.
+ */
+ public void encode( InputStream rawData, OutputStream result, COSDictionary options ) throws IOException
+ {
+ int byteRead = 0;
+ while( (byteRead = rawData.read()) != -1 )
+ {
+ int value = (byteRead+256)%256;
+ result.write( COSHEXTable.TABLE[value] );
+ }
+ result.flush();
+ }
+}
\ No newline at end of file diff --git a/src/main/java/org/pdfbox/filter/CCITTFaxDecodeFilter.java b/src/main/java/org/pdfbox/filter/CCITTFaxDecodeFilter.java new file mode 100644 index 0000000..15f4c58 --- /dev/null +++ b/src/main/java/org/pdfbox/filter/CCITTFaxDecodeFilter.java @@ -0,0 +1,735 @@ +/**
+ * Copyright (c) 2003-2005, www.pdfbox.org
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, 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. Neither the name of pdfbox; nor the names of its
+ * contributors may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS 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 REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, 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.
+ *
+ * http://www.pdfbox.org
+ *
+ */
+package org.pdfbox.filter;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+import org.apache.log4j.Logger;
+import org.pdfbox.cos.COSDictionary;
+import org.pdfbox.cos.COSName;
+
+/**
+ * This is a filter for the CCITTFax Decoder.
+ *
+ * @author Ben Litchfield, Marcel Kammer, Paul King
+ * @version $Revision: 1.10 $
+ */
+public class CCITTFaxDecodeFilter implements Filter
+{
+ private static Logger log = Logger.getLogger(CCITTFaxDecodeFilter.class);
+
+ // Filter will write 15 TAG's
+ // If you add or remove TAG's you will have to modify this value
+ private static final int TAG_COUNT = 15;
+
+ // HEADERLENGTH(fix 8 Bytes) plus ImageLength(variable)
+ private int offset = 8;
+
+ // Bytecounter for Bytes that will be written after the TAG-DICTIONARY
+ private int tailingBytesCount = 0;
+
+ // Bytes to write after TAG-DICTIONARY
+ private final ByteArrayOutputStream tailer = new ByteArrayOutputStream();
+
+ /**
+ * Constructor.
+ */
+ public CCITTFaxDecodeFilter()
+ {
+ }
+
+ /**
+ * This will decode some compressed data.
+ *
+ * @param compressedData
+ * The compressed byte stream.
+ * @param result
+ * The place to write the uncompressed byte stream.
+ * @param options
+ * The options to use to encode the data.
+ *
+ * @throws IOException
+ * If there is an error decompressing the stream.
+ */
+ public void decode(InputStream compressedData, OutputStream result, COSDictionary options) throws IOException
+ {
+ // log.warn( "Warning: CCITTFaxDecode.decode is not implemented yet,
+ // skipping this stream." );
+
+
+ // Get ImageParams from PDF
+ COSDictionary dict = (COSDictionary) options.getDictionaryObject("DecodeParms");
+ int width = options.getInt("Width");
+ int height = options.getInt("Height");
+ int length = options.getInt(COSName.LENGTH);
+ int compressionType = dict.getInt("K");
+ boolean blackIs1 = dict.getBoolean("BlackIs1", false);
+
+
+ // HEADER-INFO and starting point of TAG-DICTIONARY
+ writeTagHeader(result, length);
+
+ // IMAGE-DATA
+ int i = 0;
+ //int sum = 0;
+ byte[] buffer = new byte[32768];
+ int lentoread = length;
+
+ while ((lentoread > 0) && ((i = compressedData.read(buffer, 0, Math.min(lentoread, 32768))) != -1))
+ {
+ //sum += i;
+ result.write(buffer, 0, i);
+ lentoread = lentoread - i;
+ }
+
+ // If lentoread is > 0 then we need to write out some padding to equal the header
+ // We'll use what we have in the buffer it's just padding after all
+ while (lentoread > 0)
+ {
+ result.write(buffer, 0, Math.min(lentoread, 32768));
+ lentoread = lentoread - Math.min(lentoread, 32738);
+ }
+ //System.out.println("Gelesen: " + sum);
+
+ // TAG-COUNT
+ writeTagCount(result);
+
+ // WIDTH 0x0100
+ writeTagWidth(result, width);
+
+ // HEIGHT 0x0101
+ writeTagHeight(result, height);
+
+ // BITSPERSAMPLE 0x0102
+ // Always 1 for CCITTFax
+ writeTagBitsPerSample(result, 1);
+
+ // COMPRESSION 0x0103
+ writeTagCompression(result, compressionType);
+
+ // PHOTOMETRIC 0x0106
+ writeTagPhotometric(result, blackIs1);
+
+ // STRIPOFFSET 0x0111
+ // HERE ALWAYS 8, because ImageData comes before TAG-DICTIONARY
+ writeTagStripOffset(result, 8);
+
+ // ORIENTATION 0x0112
+ writeTagOrientation(result, 1);
+
+ // SamplesPerPixel 0x0115
+ writeTagSamplesPerPixel(result, 1);
+
+ // RowsPerStrip 0x0116
+ writeTagRowsPerStrip(result, height);
+
+ // Stripcount 0x0117
+ writeTagStripByteCount(result, length);
+
+ // XRESOLUTION 0x011A
+ // HERE: 200 DPI
+ writeTagXRes(result, 200, 1);
+
+ // YRESOLITION 0x011B
+ // HERE: 200 DPI
+ writeTagYRes(result, 200, 1);
+
+ // ResolutionUnit 0x0128
+ // HERE: DPI
+ writeTagResolutionUnit(result, 2);
+
+ // SOFTWARE 0x0131
+ // minimum 4 chars
+ writeTagSoftware(result, "pdfbox".getBytes());
+
+ // DATE AND TIME 0x0132
+ writeTagDateTime(result, new Date());
+
+ // END OF TAG-DICT
+ writeTagTailer(result);
+ }
+
+ private void writeTagHeader(OutputStream result, int length) throws IOException
+ {
+ byte[] header = { 'M', 'M', 0, '*' };// Big-endian
+ result.write(header);
+
+
+ // Add imagelength to offset
+ offset += length;
+
+ // OFFSET TAG-DICTIONARY
+ int i1 = offset/16777216;//=value/(256*256*256)
+ int i2 = (offset-i1*16777216)/65536;
+ int i3 = (offset-i1*16777216-i2*65536)/256;
+ int i4 = offset % 256;
+ result.write(i1);
+ result.write(i2);
+ result.write(i3);
+ result.write(i4);
+ }
+
+ private void writeTagCount(OutputStream result) throws IOException
+ {
+ result.write(TAG_COUNT / 256);
+ result.write(TAG_COUNT % 256);// tagCount
+ }
+
+ private void writeTagWidth(OutputStream result, int width) throws IOException
+ {
+ // @todo width berechnen
+
+ // TAG-ID 100
+ result.write(1);
+ result.write(0);
+
+
+ // TAG-TYPE SHORT=3
+ result.write(0);
+ result.write(3);
+
+
+ // TAG-LENGTH = 1
+ result.write(0);
+ result.write(0);
+ result.write(0);
+ result.write(1);
+
+
+ // TAG-VALUE = width
+ result.write(width/256);
+ result.write(width%256);
+ result.write(0);// SHORT=0
+ result.write(0);// SHORT=0
+
+ }
+
+ private void writeTagHeight(OutputStream result, int height) throws IOException
+ {
+ //@todo height berechnen
+ // TAG-ID 101
+ result.write(1);
+ result.write(1);
+
+
+ // TAG-TYPE SHORT=3
+ result.write(0);
+ result.write(3);
+
+
+ // TAG-LENGTH = 1
+ result.write(0);
+ result.write(0);
+ result.write(0);
+ result.write(1);
+
+
+ // TAG-VALUE
+ result.write(height/256);
+ result.write(height%256);
+ result.write(0);// SHORT=0
+ result.write(0);// SHORT=0
+
+ }
+
+ private void writeTagBitsPerSample(OutputStream result, int value) throws IOException
+ {
+ // TAG-ID 102
+ result.write(1);
+ result.write(2);
+
+
+ // TAG-TYPE SHORT=3
+ result.write(0);
+ result.write(3);
+
+ // TAG-LENGTH = 1
+ result.write(0);
+ result.write(0);
+ result.write(0);
+ result.write(1);
+
+
+ // TAG-VALUE
+ result.write(value/256);
+ result.write(value%256);
+ result.write(0);//SHORT=0
+ result.write(0);//SHORT=0
+
+ }
+
+ /**
+ * Write the tag compression.
+ *
+ * @param result The stream to write to.
+ * @param type The type to write.
+ * @throws IOException If there is an error writing to the stream.
+ */
+ public void writeTagCompression(OutputStream result, int type) throws IOException
+ {
+ // TAG-ID 103
+ result.write(1);
+ result.write(3);
+
+ // TAG-TYPE SHORT=3
+ result.write(0);
+ result.write(3);
+
+
+ // TAG-LEGNTH = 1
+ result.write(0);
+ result.write(0);
+ result.write(0);
+ result.write(1);
+
+ // TAG-VALUE
+ //@todo typ eintragen; hier immer 4
+ result.write(0);
+ if (type < 0)
+ {
+ result.write(4);// G4
+ }
+ else if (type == 0)
+ {
+ result.write(3);// G3-1D
+ }
+ else
+ {
+ result.write(2);// G3-2D
+ }
+ result.write(0);
+ result.write(0);
+
+ }
+
+ private void writeTagPhotometric(OutputStream result, boolean blackIs1) throws IOException
+ {
+ // TAG-ID 106
+ result.write(1);
+ result.write(6);
+
+
+ // TAG-TYPE SHORT
+ result.write(0);
+ result.write(3);
+
+
+ // TAG-LENGTH = 1
+ result.write(0);
+ result.write(0);
+ result.write(0);
+ result.write(1);
+
+
+ // TAG-VALUE
+ result.write(0);
+ if (blackIs1)
+ {
+ result.write(1);
+ }
+ else
+ {
+ result.write(0);
+ }
+ result.write(0);// SHORT=0
+ result.write(0);// SHORT=0
+
+ }
+
+ private void writeTagStripOffset(OutputStream result, int value) throws IOException
+ {
+ // TAG-ID 111
+ result.write(1);
+ result.write(17);
+
+ // TAG-TYPE LONG=4
+ result.write(0);
+ result.write(4);
+
+
+ // TAG-LENGTH=1
+ result.write(0);
+ result.write(0);
+ result.write(0);
+ result.write(1);
+
+
+ // TAG-VALUE = 8 //VOR TAG-DICTIONARY
+ int i1 = value/16777216;//=value/(256*256*256)
+ int i2 = (value-i1*16777216)/65536;
+ int i3 = (value-i1*16777216-i2*65536)/256;
+ int i4 = value % 256;
+ result.write(i1);
+ result.write(i2);
+ result.write(i3);
+ result.write(i4);
+
+ }
+
+ private void writeTagSamplesPerPixel(OutputStream result, int value) throws IOException
+ {
+ // TAG-ID 115
+ result.write(1);
+ result.write(21);
+
+
+ // TAG-TYPE SHORT=3
+ result.write(0);
+ result.write(3);
+
+
+ // TAG-LENGTH=1
+ result.write(0);
+ result.write(0);
+ result.write(0);
+ result.write(1);
+
+
+ // TAG-VALUE
+ result.write(value / 256);
+ result.write(value % 256);
+ result.write(0);// SHORT=0
+ result.write(0);// SHORT=0
+
+ }
+
+ private void writeTagRowsPerStrip(OutputStream result, int value) throws IOException
+ {
+ // TAG-ID 116
+ result.write(1);
+ result.write(22);
+
+
+ // TAG-TYPE SHORT=3
+ result.write(0);
+ result.write(3);
+
+
+ // TAG-LENGTH=1
+ result.write(0);
+ result.write(0);
+ result.write(0);
+ result.write(1);
+
+
+ // TAG-VALUE
+ result.write(value / 256);
+ result.write(value % 256);
+ result.write(0);// SHORT=0
+ result.write(0);// SHORT=0
+
+ }
+
+ private void writeTagStripByteCount(OutputStream result, int value) throws IOException
+ {
+ //@todo value auswerten
+ // TAG-ID 117
+ result.write(1);
+ result.write(23);
+
+ // TAG-TYPE LONG=4
+ result.write(0);
+ result.write(4);
+
+
+ // TAG-LENGTH = 1
+ result.write(0);
+ result.write(0);
+ result.write(0);
+ result.write(1);
+
+ // TAG-VALUE
+ int i1 = value/16777216;//=value/(256*256*256)
+ int i2 = (value-i1*16777216)/65536;
+ int i3 = (value-i1*16777216-i2*65536)/256;
+ int i4 = value % 256;
+ result.write(i1);
+ result.write(i2);
+ result.write(i3);
+ result.write(i4);
+
+ }
+
+ private void writeTagXRes(OutputStream result, int value1, int value2) throws IOException
+ {
+ // TAG-ID 11A
+ result.write(1);
+ result.write(26);
+
+ // TAG-TYPE RATIONAL=5
+ result.write(0);
+ result.write(5);
+
+ // TAG-LENGTH=1
+ result.write(0);
+ result.write(0);
+ result.write(0);
+ result.write(1);
+
+
+ // TAG-VALUE=OFFSET TO RATIONAL
+ int valueOffset = offset + 6 + 12 * TAG_COUNT + tailer.size();
+ int i1 = valueOffset/16777216;//=value/(256*256*256)
+ int i2 = (valueOffset-i1*16777216)/65536;
+ int i3 = (valueOffset-i1*16777216-i2*65536)/256;
+ int i4 = valueOffset % 256;
+ result.write(i1);
+ result.write(i2);
+ result.write(i3);
+ result.write(i4);
+
+ i1 = value1 /16777216;
+ i2 = (value1-i1*16777216)/65536;
+ i3 = (value1-i1*16777216 - i2*65536)/256;
+ i4 = value1 % 256;
+ tailer.write(i1);
+ tailer.write(i2);
+ tailer.write(i3);
+ tailer.write(i4);
+
+ i1 = value2 /16777216;
+ i2 = (value2-i1*16777216)/65536;
+ i3 = (value2-i1*16777216 - i2*65536)/256;
+ i4 = value2 % 256;
+ tailer.write(i1);
+ tailer.write(i2);
+ tailer.write(i3);
+ tailer.write(i4);
+
+ tailingBytesCount += 8;
+ }
+
+ private void writeTagYRes(OutputStream result, int value1, int value2) throws IOException
+ {
+ // TAG-ID 11B
+ result.write(1);
+ result.write(27);
+
+
+ // TAG-TYPE RATIONAL=5
+ result.write(0);
+ result.write(5);
+
+ // TAG-LENGTH=1
+ result.write(0);
+ result.write(0);
+ result.write(0);
+ result.write(1);
+
+
+ // TAG-VALUE=OFFSET TO RATIONAL
+ int valueOffset = offset + 6 + 12 * TAG_COUNT + tailer.size();
+ int i1 = valueOffset/16777216;//=value/(256*256*256)
+ int i2 = (valueOffset-i1*16777216)/65536;
+ int i3 = (valueOffset-i1*16777216-i2*65536)/256;
+ int i4 = valueOffset % 256;
+ result.write(i1);
+ result.write(i2);
+ result.write(i3);
+ result.write(i4);
+
+ i1 = value1 /16777216;
+ i2 = (value1-i1*16777216)/65536;
+ i3 = (value1-i1*16777216 - i2*65536)/256;
+ i4 = value1 % 256;
+ tailer.write(i1);
+ tailer.write(i2);
+ tailer.write(i3);
+ tailer.write(i4);
+
+ i1 = value2 /16777216;
+ i2 = (value2-i1*16777216)/65536;
+ i3 = (value2-i1*16777216 - i2*65536)/256;
+ i4 = value2 % 256;
+ tailer.write(i1);
+ tailer.write(i2);
+ tailer.write(i3);
+ tailer.write(i4);
+
+ tailingBytesCount += 8;
+ }
+
+ private void writeTagResolutionUnit(OutputStream result, int value) throws IOException
+ {
+ // TAG-ID 128
+ result.write(1);
+ result.write(40);
+
+ // TAG-TYPE SHORT=3
+ result.write(0);
+ result.write(3);
+
+ // TAG-LENGTH = 1
+ result.write(0);
+ result.write(0);
+ result.write(0);
+ result.write(1);
+
+ // TAG-VALUE
+ result.write(value/256);
+ result.write(value%256);
+ result.write(0);// SHORT=0
+ result.write(0);// SHORT=0
+
+ }
+
+ private void writeTagOrientation(OutputStream result, int value) throws IOException
+ {
+ // TAG-ID 112
+ result.write(1);
+ result.write(18);
+
+ // TAG-TYPE SHORT = 3
+ result.write(0);
+ result.write(3);
+
+
+ // TAG-LENGTH=1
+ result.write(0);
+ result.write(0);
+ result.write(0);
+ result.write(1);
+
+ // TAG-VALUE
+ result.write(value / 256);
+ result.write(value % 256);
+ result.write(0);// SHORT=0
+ result.write(0);// SHORT=0
+
+ }
+
+ private void writeTagTailer(OutputStream result) throws IOException
+ {
+ // END OF TAG-DICTIONARY
+ result.write(0);
+ result.write(0);
+ result.write(0);
+ result.write(0);
+
+ // TAILER WITH VALUES OF RATIONALFIELD's
+ result.write(tailer.toByteArray());
+ }
+
+ private void writeTagSoftware(OutputStream result, byte[] text) throws IOException
+ {
+ // TAG-ID 131
+ result.write(1);
+ result.write(49);
+
+ // TAG-TYPE ASCII=2
+ result.write(0);
+ result.write(2);
+
+
+ // TAG-LENGTH=id.length+1
+ result.write(0);
+ result.write(0);
+ result.write((text.length + 1) / 256);
+ result.write((text.length + 1) % 256);
+
+ // TAG-VALUE
+ int valueOffset = offset + 6 + 12 * TAG_COUNT + tailer.size();
+ int i1 = valueOffset/16777216;//=value/(256*256*256)
+ int i2 = (valueOffset-i1*16777216)/65536;
+ int i3 = (valueOffset-i1*16777216-i2*65536)/256;
+ int i4 = valueOffset % 256;
+ result.write(i1);
+ result.write(i2);
+ result.write(i3);
+ result.write(i4);
+
+
+ tailer.write(text);
+ tailer.write(0);
+ tailingBytesCount += text.length + 1;
+ }
+
+ private void writeTagDateTime(OutputStream result, Date date) throws IOException
+ {
+ // TAG-ID 132
+ result.write(1);
+ result.write(50);
+
+
+ // TAG-TYPE ASCII=2
+ result.write(0);
+ result.write(2);
+
+
+ // TAG-LENGTH=20
+ result.write(0);
+ result.write(0);
+ result.write(0);
+ result.write(20);
+
+
+ // TAG-VALUE
+ int valueOffset = offset + 6 + 12 * TAG_COUNT + tailer.size();
+ int i1 = valueOffset/16777216;//=value/(256*256*256)
+ int i2 = (valueOffset-i1*16777216)/65536;
+ int i3 = (valueOffset-i1*16777216-i2*65536)/256;
+ int i4 = valueOffset % 256;
+ result.write(i1);
+ result.write(i2);
+ result.write(i3);
+ result.write(i4);
+
+ SimpleDateFormat sdf = new SimpleDateFormat("yyyy:MM:dd HH:mm:ss");
+ String datetime = sdf.format(date);
+ tailer.write(datetime.getBytes());
+ tailer.write(0);
+
+ tailingBytesCount += 20;
+ }
+
+ /**
+ * This will encode some data.
+ *
+ * @param rawData
+ * The raw data to encode.
+ * @param result
+ * The place to write to encoded results to.
+ * @param options
+ * The options to use to encode the data.
+ *
+ * @throws IOException
+ * If there is an error compressing the stream.
+ */
+ public void encode(InputStream rawData, OutputStream result, COSDictionary options) throws IOException
+ {
+ log.warn("Warning: CCITTFaxDecode.encode is not implemented yet, skipping this stream.");
+ }
+}
\ No newline at end of file diff --git a/src/main/java/org/pdfbox/filter/DCTFilter.java b/src/main/java/org/pdfbox/filter/DCTFilter.java new file mode 100644 index 0000000..8f371ea --- /dev/null +++ b/src/main/java/org/pdfbox/filter/DCTFilter.java @@ -0,0 +1,77 @@ +/**
+ * Copyright (c) 2003, www.pdfbox.org
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, 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. Neither the name of pdfbox; nor the names of its
+ * contributors may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS 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 REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, 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.
+ *
+ * http://www.pdfbox.org
+ *
+ */
+package org.pdfbox.filter;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+import org.apache.log4j.Logger;
+import org.pdfbox.cos.COSDictionary;
+
+/**
+ * This is the used for the DCTDecode filter.
+ *
+ * @author Ben Litchfield (ben@csh.rit.edu)
+ * @version $Revision: 1.7 $
+ */
+public class DCTFilter implements Filter
+{
+ private static Logger log = Logger.getLogger( DCTFilter.class );
+
+ /**
+ * This will decode some compressed data.
+ *
+ * @param compressedData The compressed byte stream.
+ * @param result The place to write the uncompressed byte stream.
+ * @param options The options to use to encode the data.
+ *
+ * @throws IOException If there is an error decompressing the stream.
+ */
+ public void decode( InputStream compressedData, OutputStream result, COSDictionary options ) throws IOException
+ {
+ log.warn( "Warning: DCTFilter.decode is not implemented yet, skipping this stream." );
+ }
+
+ /**
+ * This will encode some data.
+ *
+ * @param rawData The raw data to encode.
+ * @param result The place to write to encoded results to.
+ * @param options The options to use to encode the data.
+ *
+ * @throws IOException If there is an error compressing the stream.
+ */
+ public void encode( InputStream rawData, OutputStream result, COSDictionary options ) throws IOException
+ {
+ log.warn( "Warning: DCTFilter.encode is not implemented yet, skipping this stream." );
+ }
+}
\ No newline at end of file diff --git a/src/main/java/org/pdfbox/filter/Filter.java b/src/main/java/org/pdfbox/filter/Filter.java new file mode 100644 index 0000000..8de3f81 --- /dev/null +++ b/src/main/java/org/pdfbox/filter/Filter.java @@ -0,0 +1,68 @@ +/**
+ * Copyright (c) 2003, www.pdfbox.org
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, 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. Neither the name of pdfbox; nor the names of its
+ * contributors may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS 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 REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, 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.
+ *
+ * http://www.pdfbox.org
+ *
+ */
+package org.pdfbox.filter;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+import org.pdfbox.cos.COSDictionary;
+
+/**
+ * This is the interface that will be used to apply filters to a byte stream.
+ *
+ * @author Ben Litchfield (ben@csh.rit.edu)
+ * @version $Revision: 1.5 $
+ */
+public interface Filter
+{
+ /**
+ * This will decode some compressed data.
+ *
+ * @param compressedData The compressed byte stream.
+ * @param result The place to write the uncompressed byte stream.
+ * @param options The options to use to encode the data.
+ *
+ * @throws IOException If there is an error decompressing the stream.
+ */
+ public void decode( InputStream compressedData, OutputStream result, COSDictionary options ) throws IOException;
+
+ /**
+ * This will encode some data.
+ *
+ * @param rawData The raw data to encode.
+ * @param result The place to write to encoded results to.
+ * @param options The options to use to encode the data.
+ *
+ * @throws IOException If there is an error compressing the stream.
+ */
+ public void encode( InputStream rawData, OutputStream result, COSDictionary options ) throws IOException;
+}
\ No newline at end of file diff --git a/src/main/java/org/pdfbox/filter/FilterManager.java b/src/main/java/org/pdfbox/filter/FilterManager.java new file mode 100644 index 0000000..87b1ad4 --- /dev/null +++ b/src/main/java/org/pdfbox/filter/FilterManager.java @@ -0,0 +1,135 @@ +/**
+ * Copyright (c) 2003, www.pdfbox.org
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, 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. Neither the name of pdfbox; nor the names of its
+ * contributors may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS 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 REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, 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.
+ *
+ * http://www.pdfbox.org
+ *
+ */
+package org.pdfbox.filter;
+
+import java.io.IOException;
+
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.pdfbox.cos.COSName;
+
+/**
+ * This will contain manage all the different types of filters that are available.
+ *
+ * @author Ben Litchfield
+ * @version $Revision: 1.12 $
+ */
+public class FilterManager
+{
+ private Map filters = new HashMap();
+
+ /**
+ * Constructor.
+ */
+ public FilterManager()
+ {
+ Filter flateFilter = new FlateFilter();
+ Filter dctFilter = new DCTFilter();
+ Filter ccittFaxFilter = new CCITTFaxDecodeFilter();
+ Filter lzwFilter = new LZWFilter();
+ Filter asciiHexFilter = new ASCIIHexFilter();
+ Filter ascii85Filter = new ASCII85Filter();
+ Filter runLengthFilter = new RunLengthDecodeFilter();
+
+ addFilter( COSName.FLATE_DECODE, flateFilter );
+ addFilter( COSName.FLATE_DECODE_ABBREVIATION, flateFilter );
+ addFilter( COSName.DCT_DECODE, dctFilter );
+ addFilter( COSName.DCT_DECODE_ABBREVIATION, dctFilter );
+ addFilter( COSName.CCITTFAX_DECODE, ccittFaxFilter );
+ addFilter( COSName.CCITTFAX_DECODE_ABBREVIATION, ccittFaxFilter );
+ addFilter( COSName.LZW_DECODE, lzwFilter );
+ addFilter( COSName.LZW_DECODE_ABBREVIATION, lzwFilter );
+ addFilter( COSName.ASCII_HEX_DECODE, asciiHexFilter );
+ addFilter( COSName.ASCII_HEX_DECODE_ABBREVIATION, asciiHexFilter );
+ addFilter( COSName.ASCII85_DECODE, ascii85Filter );
+ addFilter( COSName.ASCII85_DECODE_ABBREVIATION, ascii85Filter );
+ addFilter( COSName.RUN_LENGTH_DECODE, runLengthFilter );
+ addFilter( COSName.RUN_LENGTH_DECODE_ABBREVIATION, runLengthFilter );
+
+ }
+
+ /**
+ * This will get all of the filters that are available in the system.
+ *
+ * @return All available filters in the system.
+ */
+ public Collection getFilters()
+ {
+ return filters.values();
+ }
+
+ /**
+ * This will add an available filter.
+ *
+ * @param filterName The name of the filter.
+ * @param filter The filter to use.
+ */
+ public void addFilter( COSName filterName, Filter filter )
+ {
+ filters.put( filterName, filter );
+ }
+
+ /**
+ * This will get a filter by name.
+ *
+ * @param filterName The name of the filter to retrieve.
+ *
+ * @return The filter that matches the name.
+ *
+ * @throws IOException If the filter could not be found.
+ */
+ public Filter getFilter( COSName filterName ) throws IOException
+ {
+ Filter filter = (Filter)filters.get( filterName );
+ if( filter == null )
+ {
+ throw new IOException( "Unknown stream filter:" + filterName );
+ }
+
+ return filter;
+ }
+
+ /**
+ * This will get a filter by name.
+ *
+ * @param filterName The name of the filter to retrieve.
+ *
+ * @return The filter that matches the name.
+ *
+ * @throws IOException If the filter could not be found.
+ */
+ public Filter getFilter( String filterName ) throws IOException
+ {
+ return getFilter( COSName.getPDFName( filterName ) );
+ }
+}
\ No newline at end of file diff --git a/src/main/java/org/pdfbox/filter/FlateFilter.java b/src/main/java/org/pdfbox/filter/FlateFilter.java new file mode 100644 index 0000000..c239686 --- /dev/null +++ b/src/main/java/org/pdfbox/filter/FlateFilter.java @@ -0,0 +1,303 @@ +/**
+ * Copyright (c) 2003-2005, www.pdfbox.org
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, 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. Neither the name of pdfbox; nor the names of its
+ * contributors may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS 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 REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, 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.
+ *
+ * http://www.pdfbox.org
+ *
+ */
+package org.pdfbox.filter;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.zip.DeflaterOutputStream;
+import java.util.zip.InflaterInputStream;
+
+import org.pdfbox.cos.COSDictionary;
+
+/**
+ * This is the used for the FlateDecode filter.
+ *
+ * @author Ben Litchfield (ben@benlitchfield.com)
+ * @author Marcel Kammer
+ * @version $Revision: 1.9 $
+ */
+public class FlateFilter implements Filter
+{
+ private static final int BUFFER_SIZE = 2048;
+
+ /**
+ * This will decode some compressed data.
+ *
+ * @param compressedData
+ * The compressed byte stream.
+ * @param result
+ * The place to write the uncompressed byte stream.
+ * @param options
+ * The options to use to encode the data.
+ *
+ * @throws IOException
+ * If there is an error decompressing the stream.
+ */
+
+ public void decode(InputStream compressedData, OutputStream result, COSDictionary options) throws IOException
+ {
+ COSDictionary dict = (COSDictionary) options.getDictionaryObject("DecodeParms");
+ int predictor = -1;
+ int colors = -1;
+ int bitsPerPixel = -1;
+ int columns = -1;
+ InflaterInputStream decompressor = null;
+ ByteArrayInputStream bais = null;
+ ByteArrayOutputStream baos = null;
+ if (dict!=null)
+ {
+ predictor = dict.getInt("Predictor");
+ colors = dict.getInt("Colors");
+ bitsPerPixel = options.getInt("BitsPerComponent");
+ columns = dict.getInt("Columns");
+ }
+
+ try
+ {
+ // Decompress data to temporary ByteArrayOutputStream
+ decompressor = new InflaterInputStream(compressedData);
+ byte[] buffer = new byte[BUFFER_SIZE];
+ int amountRead;
+
+ // Decode data using given predictor
+ if (predictor==-1 || predictor == 1 && predictor == 10)
+ {
+ // decoding not needed
+ while ((amountRead = decompressor.read(buffer, 0, BUFFER_SIZE)) != -1)
+ {
+ result.write(buffer, 0, amountRead);
+ }
+ }
+ else
+ {
+ if (colors==-1 || bitsPerPixel==-1 || columns==-1)
+ {
+ throw new IOException("Could not read all parameters to decode image");
+ }
+
+ baos = new ByteArrayOutputStream();
+ while ((amountRead = decompressor.read(buffer, 0, BUFFER_SIZE)) != -1)
+ {
+ baos.write(buffer, 0, amountRead);
+ }
+ baos.flush();
+
+ // Copy data to ByteArrayInputStream for reading
+ bais = new ByteArrayInputStream(baos.toByteArray());
+ baos.close();
+ baos = null;
+
+ byte[] decodedData = decodePredictor(predictor, colors, bitsPerPixel, columns, bais);
+ bais.close();
+ bais = new ByteArrayInputStream(decodedData);
+
+ // write decoded data to result
+ while ((amountRead = bais.read(buffer)) != -1)
+ {
+ result.write(buffer, 0, amountRead);
+ }
+ bais.close();
+ bais = null;
+ }
+
+
+ result.flush();
+ }
+ finally
+ {
+ if (decompressor != null)
+ {
+ decompressor.close();
+ }
+ if (bais != null)
+ {
+ bais.close();
+ }
+ if (baos != null)
+ {
+ baos.close();
+ }
+ }
+ }
+
+ private byte[] decodePredictor(int predictor, int colors, int bitsPerComponent, int columns, InputStream data)
+ throws IOException
+ {
+ ByteArrayOutputStream baos = new ByteArrayOutputStream();
+ byte[] buffer = new byte[2048];
+
+ if (predictor == 1 || predictor == 10)
+ {
+ // No prediction or PNG NONE
+ int i = 0;
+ while ((i = data.read(buffer)) != -1)
+ {
+ baos.write(buffer, 0, i);
+ }
+ }
+ else
+ {
+ // calculate sizes
+ int bpp = (colors * bitsPerComponent + 7) / 8;
+ int rowlength = (columns * colors * bitsPerComponent + 7) / 8 + bpp;
+ byte[] actline = new byte[rowlength];
+ byte[] lastline = new byte[rowlength];// Initialize lastline with
+ // Zeros according to
+ // PNG-specification
+ boolean done = false;
+ int linepredictor = predictor;
+
+ while (!done)
+ {
+ if (predictor == 15)
+ {
+ linepredictor = data.read();// read per line predictor
+ if (linepredictor == -1)
+ {
+ done = true;// reached EOF
+ break;
+ }
+ else
+ {
+ linepredictor += 10; // add 10 to tread value 1 as 11
+ }
+ // (instead of PRED NONE) and 2
+ // as 12 (instead of PRED TIFF)
+ }
+
+ // read line
+ int i = 0;
+ int offset = bpp;
+ while (offset < rowlength && ((i = data.read(actline, offset, rowlength - offset)) != -1))
+ {
+ offset += i;
+ }
+
+ // Do prediction as specified in PNG-Specification 1.2
+ switch (linepredictor)
+ {
+ case 2:// PRED TIFF SUB
+ /**
+ * @todo decode tiff
+ */
+ throw new IOException("TIFF-Predictor not supported");
+ case 11:// PRED SUB
+ for (int p = bpp; p < rowlength; p++)
+ {
+ int sub = actline[p] & 0xff;
+ int left = actline[p - bpp] & 0xff;
+ actline[p] = (byte) (sub + left);
+ }
+ break;
+ case 12:// PRED UP
+ for (int p = bpp; p < rowlength; p++)
+ {
+ int up = actline[p] & 0xff;
+ int prior = lastline[p] & 0xff;
+ actline[p] = (byte) (up + prior);
+ }
+ break;
+ case 13:// PRED AVG
+ for (int p = bpp; p < rowlength; p++)
+ {
+ int avg = actline[p] & 0xff;
+ int left = actline[p - bpp] & 0xff;
+ int up = lastline[p] & 0xff;
+ actline[p] = (byte) (avg + ((left + up) / 2));
+ }
+ break;
+ case 14:// PRED PAETH
+ for (int p = bpp; p < rowlength; p++)
+ {
+ int paeth = actline[p] & 0xff;
+ int a = actline[p - bpp] & 0xff;// left
+ int b = lastline[p] & 0xff;// upper
+ int c = lastline[p - bpp] & 0xff;// upperleft
+ int value = a + b - c;
+ int absa = Math.abs(value - a);
+ int absb = Math.abs(value - b);
+ int absc = Math.abs(value - c);
+
+ if (absa <= absb && absa <= absc)
+ {
+ actline[p] = (byte) (paeth + absa);
+ }
+ else if (absb <= absc)
+ {
+ actline[p] += (byte) (paeth + absb);
+ }
+ else
+ {
+ actline[p] += (byte) (paeth + absc);
+ }
+ }
+ break;
+ default:
+ break;
+ }
+
+ lastline = actline;
+ baos.write(actline, bpp, actline.length - bpp);
+ }
+ }
+
+ return baos.toByteArray();
+ }
+
+ /**
+ * This will encode some data.
+ *
+ * @param rawData
+ * The raw data to encode.
+ * @param result
+ * The place to write to encoded results to.
+ * @param options
+ * The options to use to encode the data.
+ *
+ * @throws IOException
+ * If there is an error compressing the stream.
+ */
+ public void encode(InputStream rawData, OutputStream result, COSDictionary options) throws IOException
+ {
+ DeflaterOutputStream out = new DeflaterOutputStream(result);
+ byte[] buffer = new byte[BUFFER_SIZE];
+ int amountRead = 0;
+ while ((amountRead = rawData.read(buffer, 0, BUFFER_SIZE)) != -1)
+ {
+ out.write(buffer, 0, amountRead);
+ }
+ out.close();
+ result.flush();
+ }
+}
\ No newline at end of file diff --git a/src/main/java/org/pdfbox/filter/LZWDictionary.java b/src/main/java/org/pdfbox/filter/LZWDictionary.java new file mode 100644 index 0000000..075dab8 --- /dev/null +++ b/src/main/java/org/pdfbox/filter/LZWDictionary.java @@ -0,0 +1,215 @@ +/**
+ * Copyright (c) 2003, www.pdfbox.org
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, 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. Neither the name of pdfbox; nor the names of its
+ * contributors may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS 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 REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, 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.
+ *
+ * http://www.pdfbox.org
+ *
+ */
+package org.pdfbox.filter;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * This is the used for the LZWDecode filter. This represents the dictionary mappings
+ * between codes and their values.
+ *
+ * @author Ben Litchfield (ben@csh.rit.edu)
+ * @version $Revision: 1.3 $
+ */
+class LZWDictionary
+{
+ private Map codeToData = new HashMap();
+ private LZWNode root = new LZWNode();
+
+ private ByteArrayOutputStream buffer = new ByteArrayOutputStream();
+ private long nextCode = 258;
+ private int codeSize = 9;
+
+ /**
+ * constructor.
+ */
+ public LZWDictionary()
+ {
+ for( long i=0; i<256; i++ )
+ {
+ LZWNode node = new LZWNode();
+ node.setCode( i );
+ root.setNode( (byte)i, node );
+ codeToData.put( new Long( i ), new byte[]{ (byte)i } );
+ }
+ }
+
+ /**
+ * This will get the value for the code. It will return null if the code is not
+ * defined.
+ *
+ * @param code The key to the data.
+ *
+ * @return The data that is mapped to the code.
+ */
+ public byte[] getData( long code )
+ {
+ return (byte[])codeToData.get( new Long( code ) );
+ }
+
+ /**
+ * This will take a visit from a byte[]. This will create new code entries as
+ * necessary.
+ *
+ * @param data The byte to get a visit from.
+ *
+ * @throws IOException If there is an error visiting this data.
+ */
+ public void visit( byte[] data ) throws IOException
+ {
+ for( int i=0; i<data.length; i++ )
+ {
+ visit( data[i] );
+ }
+ }
+
+ /**
+ * This will take a visit from a byte. This will create new code entries as
+ * necessary.
+ *
+ * @param data The byte to get a visit from.
+ *
+ * @throws IOException If there is an error visiting this data.
+ */
+ public void visit( byte data ) throws IOException
+ {
+ buffer.write( data );
+ byte[] curBuffer = buffer.toByteArray();
+ LZWNode previous = null;
+ LZWNode current = root;
+ boolean createNewCode = false;
+ for( int i=0; i<curBuffer.length && current != null; i++ )
+ {
+ previous = current;
+ current = current.getNode( curBuffer[i] );
+ if( current == null )
+ {
+ createNewCode = true;
+ current = new LZWNode();
+ previous.setNode( curBuffer[i], current );
+ }
+ }
+ if( createNewCode )
+ {
+ long code = nextCode++;
+ current.setCode( code );
+ codeToData.put( new Long( code ), curBuffer );
+
+ /**
+ System.out.print( "Adding " + code + "='" );
+ for( int i=0; i<curBuffer.length; i++ )
+ {
+ String hex = Integer.toHexString( ((curBuffer[i]+256)%256) );
+ if( hex.length() <=1 )
+ {
+ hex = "0" + hex;
+ }
+ if( i != curBuffer.length -1 )
+ {
+ hex += " ";
+ }
+ System.out.print( hex.toUpperCase() );
+ }
+ System.out.println( "'" );
+ **/
+ buffer.reset();
+ buffer.write( data );
+ resetCodeSize();
+ }
+ }
+
+ /**
+ * This will get the next code that will be created.
+ *
+ * @return The next code to be created.
+ */
+ public long getNextCode()
+ {
+ return nextCode;
+ }
+
+ /**
+ * This will get the size of the code in bits, 9, 10, or 11.
+ *
+ * @return The size of the code in bits.
+ */
+ public int getCodeSize()
+ {
+ return codeSize;
+ }
+
+ /**
+ * This will determine the code size.
+ */
+ private void resetCodeSize()
+ {
+ if( nextCode >= 2048 )
+ {
+ codeSize = 12;
+ }
+ else if( nextCode >= 1024 )
+ {
+ codeSize = 11;
+ }
+ else if( nextCode >= 512 )
+ {
+ codeSize = 10;
+ }
+ else
+ {
+ codeSize = 9;
+ }
+ }
+
+ /**
+ * This will crear the internal buffer that the dictionary uses.
+ */
+ public void clear()
+ {
+ buffer.reset();
+ }
+
+ /**
+ * This will folow the path to the data node.
+ *
+ * @param data The path to the node.
+ *
+ * @return The node that resides at that path.
+ */
+ public LZWNode getNode( byte[] data )
+ {
+ return root.getNode( data );
+ }
+}
\ No newline at end of file diff --git a/src/main/java/org/pdfbox/filter/LZWFilter.java b/src/main/java/org/pdfbox/filter/LZWFilter.java new file mode 100644 index 0000000..e8ba003 --- /dev/null +++ b/src/main/java/org/pdfbox/filter/LZWFilter.java @@ -0,0 +1,235 @@ +/**
+ * Copyright (c) 2003-2005, www.pdfbox.org
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, 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. Neither the name of pdfbox; nor the names of its
+ * contributors may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS 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 REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, 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.
+ *
+ * http://www.pdfbox.org
+ *
+ */
+package org.pdfbox.filter;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.PushbackInputStream;
+import java.io.StreamCorruptedException;
+
+import org.pdfbox.cos.COSDictionary;
+
+import org.pdfbox.io.NBitInputStream;
+import org.pdfbox.io.NBitOutputStream;
+
+/**
+ * This is the used for the LZWDecode filter.
+ *
+ * @author Ben Litchfield (ben@benlitchfield.com)
+ * @version $Revision: 1.13 $
+ */
+public class LZWFilter implements Filter
+{
+
+ /**
+ * The LZW clear table code.
+ */
+ public static final long CLEAR_TABLE = 256;
+ /**
+ * The LZW end of data code.
+ */
+ public static final long EOD = 257;
+
+ /**
+ * This will decode some compressed data.
+ *
+ * @param compressedData The compressed byte stream.
+ * @param result The place to write the uncompressed byte stream.
+ * @param options The options to use to encode the data.
+ *
+ * @throws IOException If there is an error decompressing the stream.
+ */
+ public void decode( InputStream compressedData, OutputStream result, COSDictionary options ) throws IOException
+ {
+ //log.debug("decode( )");
+ NBitInputStream in = null;
+ in = new NBitInputStream( compressedData );
+ in.setBitsInChunk( 9 );
+ LZWDictionary dic = new LZWDictionary();
+ byte firstByte = 0;
+ long nextCommand = 0;
+ while( (nextCommand = in.read() ) != EOD )
+ {
+ // log.debug( "decode - nextCommand=" + nextCommand + ", bitsInChunk: " + in.getBitsInChunk());
+
+ if( nextCommand == CLEAR_TABLE )
+ {
+ in.setBitsInChunk( 9 );
+ dic = new LZWDictionary();
+ }
+ else
+ {
+ byte[] data = dic.getData( nextCommand );
+ if( data == null )
+ {
+ dic.visit( firstByte );
+ data = dic.getData( nextCommand );
+ dic.clear();
+ }
+ if( data == null )
+ {
+ throw new StreamCorruptedException( "Error: data is null" );
+ }
+ dic.visit(data);
+
+ //log.debug( "decode - dic.getNextCode(): " + dic.getNextCode());
+
+ if( dic.getNextCode() >= 2047 )
+ {
+ in.setBitsInChunk( 12 );
+ }
+ else if( dic.getNextCode() >= 1023 )
+ {
+ in.setBitsInChunk( 11 );
+ }
+ else if( dic.getNextCode() >= 511 )
+ {
+ in.setBitsInChunk( 10 );
+ }
+ else
+ {
+ in.setBitsInChunk( 9 );
+ }
+ /**
+ if( in.getBitsInChunk() != dic.getCodeSize() )
+ {
+ in.unread( nextCommand );
+ in.setBitsInChunk( dic.getCodeSize() );
+ System.out.print( "Switching " + nextCommand + " to " );
+ nextCommand = in.read();
+ System.out.println( "" + nextCommand );
+ data = dic.getData( nextCommand );
+ }**/
+ firstByte = data[0];
+ result.write( data );
+ }
+ }
+ result.flush();
+ }
+
+
+ /**
+ * This will encode some data.
+ *
+ * @param rawData The raw data to encode.
+ * @param result The place to write to encoded results to.
+ * @param options The options to use to encode the data.
+ *
+ * @throws IOException If there is an error compressing the stream.
+ */
+ public void encode( InputStream rawData, OutputStream result, COSDictionary options ) throws IOException
+ {
+ //log.debug("encode( )");
+ PushbackInputStream input = new PushbackInputStream( rawData, 4096 );
+ LZWDictionary dic = new LZWDictionary();
+ NBitOutputStream out = new NBitOutputStream( result );
+ out.setBitsInChunk( 9 ); //initially nine
+ out.write( CLEAR_TABLE );
+ ByteArrayOutputStream buffer = new ByteArrayOutputStream();
+ int byteRead = 0;
+ for( int i=0; (byteRead = input.read()) != -1; i++ )
+ {
+ //log.debug( "byteRead = '" + (char)byteRead + "' (0x" + Integer.toHexString(byteRead) + "), i=" + i);
+ buffer.write( byteRead );
+ dic.visit( (byte)byteRead );
+ out.setBitsInChunk( dic.getCodeSize() );
+
+ //log.debug( "Getting node '" + new String( buffer.toByteArray() ) + "', buffer.size = " + buffer.size() );
+ LZWNode node = dic.getNode( buffer.toByteArray() );
+ int nextByte = input.read();
+ if( nextByte != -1 )
+ {
+ //log.debug( "nextByte = '" + (char)nextByte + "' (0x" + Integer.toHexString(nextByte) + ")");
+ LZWNode next = node.getNode( (byte)nextByte );
+ if( next == null )
+ {
+ //log.debug("encode - No next node, writing node and resetting buffer (" +
+ // " node.getCode: " + node.getCode() + ")" +
+ // " bitsInChunk: " + out.getBitsInChunk() +
+ // ")");
+ out.write( node.getCode() );
+ buffer.reset();
+ }
+
+ input.unread( nextByte );
+ }
+ else
+ {
+ //log.debug("encode - EOF on lookahead: writing node, resetting buffer, and terminating read loop (" +
+ // " node.getCode: " + node.getCode() + ")" +
+ // " bitsInChunk: " + out.getBitsInChunk() +
+ // ")");
+ out.write( node.getCode() );
+ buffer.reset();
+ break;
+ }
+
+ if( dic.getNextCode() == 4096 )
+ {
+ //log.debug("encode - Clearing dictionary and unreading pending buffer data (" +
+ // " bitsInChunk: " + out.getBitsInChunk() +
+ // ")");
+ out.write( CLEAR_TABLE );
+ dic = new LZWDictionary();
+ input.unread( buffer.toByteArray() );
+ buffer.reset();
+ }
+ }
+
+ // Fix the code size based on the fact that we are writing the EOD
+ //
+ if( dic.getNextCode() >= 2047 )
+ {
+ out.setBitsInChunk( 12 );
+ }
+ else if( dic.getNextCode() >= 1023 )
+ {
+ out.setBitsInChunk( 11 );
+ }
+ else if( dic.getNextCode() >= 511 )
+ {
+ out.setBitsInChunk( 10 );
+ }
+ else
+ {
+ out.setBitsInChunk( 9 );
+ }
+
+ //log.debug("encode - Writing EOD (" +
+ // " bitsInChunk: " + out.getBitsInChunk() +
+ // ")");
+ out.write( EOD );
+ out.close();
+ result.flush();
+ }
+}
\ No newline at end of file diff --git a/src/main/java/org/pdfbox/filter/LZWNode.java b/src/main/java/org/pdfbox/filter/LZWNode.java new file mode 100644 index 0000000..563ea5d --- /dev/null +++ b/src/main/java/org/pdfbox/filter/LZWNode.java @@ -0,0 +1,115 @@ +/**
+ * Copyright (c) 2003, www.pdfbox.org
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, 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. Neither the name of pdfbox; nor the names of its
+ * contributors may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS 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 REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, 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.
+ *
+ * http://www.pdfbox.org
+ *
+ */
+package org.pdfbox.filter;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * This is the used for the LZWDecode filter.
+ *
+ * @author Ben Litchfield (ben@csh.rit.edu)
+ * @version $Revision: 1.3 $
+ */
+class LZWNode
+{
+ private long code;
+ private Map subNodes = new HashMap();
+
+ /**
+ * This will get the number of children.
+ *
+ * @return The number of children.
+ */
+ public int childCount()
+ {
+ return subNodes.size();
+ }
+
+ /**
+ * This will set the node for a particular byte.
+ *
+ * @param b The byte for that node.
+ * @param node The node to add.
+ */
+ public void setNode( byte b, LZWNode node )
+ {
+ subNodes.put( new Byte( b ), node );
+ }
+
+ /**
+ * This will get the node that is a direct sub node of this node.
+ *
+ * @param data The byte code to the node.
+ *
+ * @return The node at that value if it exists.
+ */
+ public LZWNode getNode( byte data )
+ {
+ return (LZWNode)subNodes.get( new Byte( data ) );
+ }
+
+
+ /**
+ * This will traverse the tree until it gets to the sub node.
+ * This will return null if the node does not exist.
+ *
+ * @param data The path to the node.
+ *
+ * @return The node that resides at the data path.
+ */
+ public LZWNode getNode( byte[] data )
+ {
+ LZWNode current = this;
+ for( int i=0; i<data.length && current != null; i++ )
+ {
+ current = current.getNode( data[i] );
+ }
+ return current;
+ }
+
+ /** Getter for property code.
+ * @return Value of property code.
+ */
+ public long getCode()
+ {
+ return code;
+ }
+
+ /** Setter for property code.
+ * @param codeValue New value of property code.
+ */
+ public void setCode(long codeValue)
+ {
+ code = codeValue;
+ }
+
+}
\ No newline at end of file diff --git a/src/main/java/org/pdfbox/filter/RunLengthDecodeFilter.java b/src/main/java/org/pdfbox/filter/RunLengthDecodeFilter.java new file mode 100644 index 0000000..d1fe1c1 --- /dev/null +++ b/src/main/java/org/pdfbox/filter/RunLengthDecodeFilter.java @@ -0,0 +1,126 @@ +/**
+ * Copyright (c) 2004, www.pdfbox.org
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, 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. Neither the name of pdfbox; nor the names of its
+ * contributors may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS 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 REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, 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.
+ *
+ * http://www.pdfbox.org
+ *
+ */
+package org.pdfbox.filter;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+import org.apache.log4j.Logger;
+import org.pdfbox.cos.COSDictionary;
+
+/**
+ * This is a filter for the RunLength Decoder.
+ *
+ * From the PDF Reference
+ * <pre>
+ * The RunLengthDecode filter decodes data that has been encoded in a simple
+ * byte-oriented format based on run length. The encoded data is a sequence of
+ * runs, where each run consists of a length byte followed by 1 to 128 bytes of data. If
+ * the length byte is in the range 0 to 127, the following length + 1 (1 to 128) bytes
+ * are copied literally during decompression. If length is in the range 129 to 255, the
+ * following single byte is to be copied 257 ? length (2 to 128) times during decompression.
+ * A length value of 128 denotes EOD.
+ *
+ * The compression achieved by run-length encoding depends on the input data. In
+ * the best case (all zeros), a compression of approximately 64:1 is achieved for long
+ * files. The worst case (the hexadecimal sequence 00 alternating with FF) results in
+ * an expansion of 127:128.
+ * </pre>
+ *
+ * @author Ben Litchfield
+ * @version $Revision: 1.3 $
+ */
+public class RunLengthDecodeFilter implements Filter
+{
+ private static Logger log = Logger.getLogger( RunLengthDecodeFilter.class );
+
+ private static final int RUN_LENGTH_EOD = 128;
+
+ /**
+ * Constructor.
+ */
+ public RunLengthDecodeFilter()
+ {
+ //default constructor
+ }
+
+ /**
+ * This will decode some compressed data.
+ *
+ * @param compressedData The compressed byte stream.
+ * @param result The place to write the uncompressed byte stream.
+ * @param options The options to use to encode the data.
+ *
+ * @throws IOException If there is an error decompressing the stream.
+ */
+ public void decode( InputStream compressedData, OutputStream result, COSDictionary options ) throws IOException
+ {
+ int dupAmount = -1;
+ byte[] buffer = new byte[128];
+ while( (dupAmount = compressedData.read()) != -1 && dupAmount != RUN_LENGTH_EOD )
+ {
+ if( dupAmount <= 127 )
+ {
+ int amountToCopy = dupAmount+1;
+ int compressedRead = 0;
+ while( amountToCopy > 0 )
+ {
+ compressedRead = compressedData.read( buffer, 0, amountToCopy );
+ result.write( buffer, 0, compressedRead );
+ amountToCopy -= compressedRead;
+ }
+ }
+ else
+ {
+ int dupByte = compressedData.read();
+ for( int i=0; i<257-dupAmount; i++ )
+ {
+ result.write( dupByte );
+ }
+ }
+ }
+ }
+
+ /**
+ * This will encode some data.
+ *
+ * @param rawData The raw data to encode.
+ * @param result The place to write to encoded results to.
+ * @param options The options to use to encode the data.
+ *
+ * @throws IOException If there is an error compressing the stream.
+ */
+ public void encode( InputStream rawData, OutputStream result, COSDictionary options ) throws IOException
+ {
+ log.warn( "Warning: RunLengthDecodeFilter.encode is not implemented yet, skipping this stream." );
+ }
+}
\ No newline at end of file diff --git a/src/main/java/org/pdfbox/filter/package.html b/src/main/java/org/pdfbox/filter/package.html new file mode 100644 index 0000000..36dbb7d --- /dev/null +++ b/src/main/java/org/pdfbox/filter/package.html @@ -0,0 +1,9 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
+<html>
+<head>
+
+</head>
+<body>
+This package will hold the PDFBox implementations of the filters that are used in PDF documents.
+</body>
+</html>
|