com.itextpdf.io.codec.TiffWriter Maven / Gradle / Ivy
/*
This file is part of the iText (R) project.
Copyright (c) 1998-2019 iText Group NV
Authors: Bruno Lowagie, Paulo Soares, et al.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License version 3
as published by the Free Software Foundation with the addition of the
following permission added to Section 15 as permitted in Section 7(a):
FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
OF THIRD PARTY RIGHTS
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program; if not, see http://www.gnu.org/licenses or write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA, 02110-1301 USA, or download the license from the following URL:
http://itextpdf.com/terms-of-use/
The interactive user interfaces in modified source and object code versions
of this program must display Appropriate Legal Notices, as required under
Section 5 of the GNU Affero General Public License.
In accordance with Section 7(b) of the GNU Affero General Public License,
a covered work must retain the producer line in every PDF that is created
or manipulated using iText.
You can be released from the requirements of the license by purchasing
a commercial license. Buying such a license is mandatory as soon as you
develop commercial activities involving the iText software without
disclosing the source code of your own applications.
These activities include: offering paid services to customers as an ASP,
serving PDFs on the fly in a web application, shipping iText with a closed
source product.
For more information, please contact iText Software Corp. at this
address: [email protected]
*/
package com.itextpdf.io.codec;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.charset.StandardCharsets;
import java.util.TreeMap;
/**
* Exports images as TIFF.
*/
public class TiffWriter {
private TreeMap ifd = new TreeMap();
public void addField(FieldBase field) {
ifd.put(Integer.valueOf(field.getTag()), field);
}
public int getIfdSize() {
return 6 + ifd.size() * 12;
}
public void writeFile(OutputStream stream) throws IOException {
stream.write(0x4d);
stream.write(0x4d);
stream.write(0);
stream.write(42);
writeLong(8, stream);
writeShort(ifd.size(), stream);
int offset = 8 + getIfdSize();
for (FieldBase field : ifd.values()) {
int size = field.getValueSize();
if (size > 4) {
field.setOffset(offset);
offset += size;
}
field.writeField(stream);
}
writeLong(0, stream);
for (FieldBase field : ifd.values()) {
field.writeValue(stream);
}
}
/**
* Inner class class containing information about a field.
*/
public abstract static class FieldBase {
private int tag;
private int fieldType;
private int count;
protected byte[] data;
private int offset;
protected FieldBase(int tag, int fieldType, int count) {
this.tag = tag;
this.fieldType = fieldType;
this.count = count;
}
public int getValueSize() {
return (int) ((data.length + 1) & 0xfffffffe);
}
public int getTag() {
return tag;
}
public void setOffset(int offset) {
this.offset = offset;
}
public void writeField(OutputStream stream) throws IOException {
writeShort(tag, stream);
writeShort(fieldType, stream);
writeLong(count, stream);
if (data.length <= 4) {
stream.write(data);
for (int k = data.length; k < 4; ++k) {
stream.write(0);
}
} else {
writeLong(offset, stream);
}
}
public void writeValue(OutputStream stream) throws IOException {
if (data.length <= 4)
return;
stream.write(data);
if ((data.length & 1) == 1)
stream.write(0);
}
}
/**
* Inner class containing info about a field.
*/
public static class FieldShort extends FieldBase {
public FieldShort(int tag, int value) {
super(tag, 3, 1);
data = new byte[2];
data[0] = (byte) (value >> 8);
data[1] = (byte) value;
}
public FieldShort(int tag, int[] values) {
super(tag, 3, values.length);
data = new byte[values.length * 2];
int ptr = 0;
for (int value : values) {
data[ptr++] = (byte) (value >> 8);
data[ptr++] = (byte) value;
}
}
}
/**
* Inner class containing info about a field.
*/
public static class FieldLong extends FieldBase {
public FieldLong(int tag, int value) {
super(tag, 4, 1);
data = new byte[4];
data[0] = (byte) (value >> 24);
data[1] = (byte) (value >> 16);
data[2] = (byte) (value >> 8);
data[3] = (byte) value;
}
public FieldLong(int tag, int[] values) {
super(tag, 4, values.length);
data = new byte[values.length * 4];
int ptr = 0;
for (int value : values) {
data[ptr++] = (byte) (value >> 24);
data[ptr++] = (byte) (value >> 16);
data[ptr++] = (byte) (value >> 8);
data[ptr++] = (byte) value;
}
}
}
/**
* Inner class containing info about a field.
*/
public static class FieldRational extends FieldBase {
public FieldRational(int tag, int[] value) {
this(tag, new int[][]{value});
}
public FieldRational(int tag, int[][] values) {
super(tag, 5, values.length);
data = new byte[values.length * 8];
int ptr = 0;
for (int value[] : values) {
data[ptr++] = (byte) (value[0] >> 24);
data[ptr++] = (byte) (value[0] >> 16);
data[ptr++] = (byte) (value[0] >> 8);
data[ptr++] = (byte) value[0];
data[ptr++] = (byte) (value[1] >> 24);
data[ptr++] = (byte) (value[1] >> 16);
data[ptr++] = (byte) (value[1] >> 8);
data[ptr++] = (byte) value[1];
}
}
}
/**
* Inner class containing info about a field.
*/
public static class FieldByte extends FieldBase {
public FieldByte(int tag, byte[] values) {
super(tag, 1, values.length);
data = values;
}
}
/**
* Inner class containing info about a field.
*/
public static class FieldUndefined extends FieldBase {
public FieldUndefined(int tag, byte[] values) {
super(tag, 7, values.length);
data = values;
}
}
/**
* Inner class containing info about a field.
*/
public static class FieldImage extends FieldBase {
public FieldImage(byte[] values) {
super(TIFFConstants.TIFFTAG_STRIPOFFSETS, 4, 1);
data = values;
}
}
/**
* Inner class containing info about an ASCII field.
*/
public static class FieldAscii extends FieldBase {
public FieldAscii(int tag, String values) {
super(tag, 2, values.getBytes(StandardCharsets.US_ASCII).length + 1);
byte[] b = values.getBytes(StandardCharsets.US_ASCII);
data = new byte[b.length + 1];
System.arraycopy(b, 0, data, 0, b.length);
}
}
public static void writeShort(int v, OutputStream stream) throws IOException {
stream.write((v >> 8) & 0xff);
stream.write(v & 0xff);
}
public static void writeLong(int v, OutputStream stream) throws IOException {
stream.write((v >> 24) & 0xff);
stream.write((v >> 16) & 0xff);
stream.write((v >> 8) & 0xff);
stream.write(v & 0xff);
}
public static void compressLZW(OutputStream stream, int predictor, byte[] b, int height, int samplesPerPixel, int stride) throws IOException {
LZWCompressor lzwCompressor = new LZWCompressor(stream, 8, true);
boolean usePredictor = predictor == TIFFConstants.PREDICTOR_HORIZONTAL_DIFFERENCING;
if (!usePredictor) {
lzwCompressor.compress(b, 0, b.length);
} else {
int off = 0;
byte[] rowBuf = new byte[stride];
for (int i = 0; i < height; i++) {
System.arraycopy(b, off, rowBuf, 0, stride);
for (int j = stride - 1; j >= samplesPerPixel; j--) {
rowBuf[j] -= rowBuf[j - samplesPerPixel];
}
lzwCompressor.compress(rowBuf, 0, stride);
off += stride;
}
}
lzwCompressor.flush();
}
}
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