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/*
* $RCSfile: TIFFIFD.java,v $
*
*
* Copyright (c) 2005 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution 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.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any
* kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
* EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
* NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
* USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
* DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
* ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
* CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
* REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
* INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for
* use in the design, construction, operation or maintenance of any
* nuclear facility.
*
* $Revision: 1.7 $
* $Date: 2006/09/27 23:56:30 $
* $State: Exp $
*/
package com.github.jaiimageio.impl.plugins.tiff;
import java.io.EOFException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.Vector;
import javax.imageio.stream.ImageInputStream;
import javax.imageio.stream.ImageOutputStream;
import com.github.jaiimageio.plugins.tiff.BaselineTIFFTagSet;
import com.github.jaiimageio.plugins.tiff.TIFFDirectory;
import com.github.jaiimageio.plugins.tiff.TIFFField;
import com.github.jaiimageio.plugins.tiff.TIFFTag;
import com.github.jaiimageio.plugins.tiff.TIFFTagSet;
public class TIFFIFD extends TIFFDirectory {
private long stripOrTileByteCountsPosition = -1;
private long stripOrTileOffsetsPosition = -1;
private long lastPosition = -1;
public static TIFFTag getTag(int tagNumber, List tagSets) {
Iterator iter = tagSets.iterator();
while (iter.hasNext()) {
TIFFTagSet tagSet = (TIFFTagSet)iter.next();
TIFFTag tag = tagSet.getTag(tagNumber);
if (tag != null) {
return tag;
}
}
return null;
}
public static TIFFTag getTag(String tagName, List tagSets) {
Iterator iter = tagSets.iterator();
while (iter.hasNext()) {
TIFFTagSet tagSet = (TIFFTagSet)iter.next();
TIFFTag tag = tagSet.getTag(tagName);
if (tag != null) {
return tag;
}
}
return null;
}
private static void writeTIFFFieldToStream(TIFFField field,
ImageOutputStream stream)
throws IOException {
int count = field.getCount();
Object data = field.getData();
switch (field.getType()) {
case TIFFTag.TIFF_ASCII:
for (int i = 0; i < count; i++) {
String s = ((String[])data)[i];
int length = s.length();
for (int j = 0; j < length; j++) {
stream.writeByte(s.charAt(j) & 0xff);
}
stream.writeByte(0);
}
break;
case TIFFTag.TIFF_UNDEFINED:
case TIFFTag.TIFF_BYTE:
case TIFFTag.TIFF_SBYTE:
stream.write((byte[])data);
break;
case TIFFTag.TIFF_SHORT:
stream.writeChars((char[])data, 0, ((char[])data).length);
break;
case TIFFTag.TIFF_SSHORT:
stream.writeShorts((short[])data, 0, ((short[])data).length);
break;
case TIFFTag.TIFF_SLONG:
stream.writeInts((int[])data, 0, ((int[])data).length);
break;
case TIFFTag.TIFF_LONG:
for (int i = 0; i < count; i++) {
stream.writeInt((int)(((long[])data)[i]));
}
break;
case TIFFTag.TIFF_IFD_POINTER:
stream.writeInt(0); // will need to be backpatched
break;
case TIFFTag.TIFF_FLOAT:
stream.writeFloats((float[])data, 0, ((float[])data).length);
break;
case TIFFTag.TIFF_DOUBLE:
stream.writeDoubles((double[])data, 0, ((double[])data).length);
break;
case TIFFTag.TIFF_SRATIONAL:
for (int i = 0; i < count; i++) {
stream.writeInt(((int[][])data)[i][0]);
stream.writeInt(((int[][])data)[i][1]);
}
break;
case TIFFTag.TIFF_RATIONAL:
for (int i = 0; i < count; i++) {
long num = ((long[][])data)[i][0];
long den = ((long[][])data)[i][1];
stream.writeInt((int)num);
stream.writeInt((int)den);
}
break;
default:
// error
}
}
public TIFFIFD(List tagSets, TIFFTag parentTag) {
super((TIFFTagSet[])tagSets.toArray(new TIFFTagSet[tagSets.size()]),
parentTag);
}
public TIFFIFD(List tagSets) {
this(tagSets, null);
}
public List getTagSetList() {
return Arrays.asList(getTagSets());
}
/**
* Returns an Iterator over the TIFF fields. The
* traversal is in the order of increasing tag number.
*/
// Note: the sort is guaranteed for low fields by the use of an
// array wherein the index corresponds to the tag number and for
// the high fields by the use of a TreeMap with tag number keys.
public Iterator iterator() {
return Arrays.asList(getTIFFFields()).iterator();
}
// Stream position initially at beginning, left at end
// if ignoreUnknownFields is true, do not load fields for which
// a tag cannot be found in an allowed TagSet.
public void initialize(ImageInputStream stream,
boolean ignoreUnknownFields) throws IOException {
removeTIFFFields();
List tagSetList = getTagSetList();
int numEntries = stream.readUnsignedShort();
for (int i = 0; i < numEntries; i++) {
// Read tag number, value type, and value count.
int tag = stream.readUnsignedShort();
int type = stream.readUnsignedShort();
int count = (int)stream.readUnsignedInt();
// Get the associated TIFFTag.
TIFFTag tiffTag = getTag(tag, tagSetList);
// Ignore unknown fields.
if(ignoreUnknownFields && tiffTag == null) {
// Skip the value/offset so as to leave the stream
// position at the start of the next IFD entry.
stream.skipBytes(4);
// XXX Warning message ...
// Continue with the next IFD entry.
continue;
}
long nextTagOffset = stream.getStreamPosition() + 4;
int sizeOfType = TIFFTag.getSizeOfType(type);
if (count*sizeOfType > 4) {
long value = stream.readUnsignedInt();
stream.seek(value);
}
if (tag == BaselineTIFFTagSet.TAG_STRIP_BYTE_COUNTS ||
tag == BaselineTIFFTagSet.TAG_TILE_BYTE_COUNTS ||
tag == BaselineTIFFTagSet.TAG_JPEG_INTERCHANGE_FORMAT_LENGTH) {
this.stripOrTileByteCountsPosition =
stream.getStreamPosition();
} else if (tag == BaselineTIFFTagSet.TAG_STRIP_OFFSETS ||
tag == BaselineTIFFTagSet.TAG_TILE_OFFSETS ||
tag == BaselineTIFFTagSet.TAG_JPEG_INTERCHANGE_FORMAT) {
this.stripOrTileOffsetsPosition =
stream.getStreamPosition();
}
Object obj = null;
try {
switch (type) {
case TIFFTag.TIFF_BYTE:
case TIFFTag.TIFF_SBYTE:
case TIFFTag.TIFF_UNDEFINED:
case TIFFTag.TIFF_ASCII:
byte[] bvalues = new byte[count];
stream.readFully(bvalues, 0, count);
if (type == TIFFTag.TIFF_ASCII) {
// Can be multiple strings
Vector v = new Vector();
boolean inString = false;
int prevIndex = 0;
for (int index = 0; index <= count; index++) {
if (index < count && bvalues[index] != 0) {
if (!inString) {
// start of string
prevIndex = index;
inString = true;
}
} else { // null or special case at end of string
if (inString) {
// end of string
String s = new String(bvalues, prevIndex,
index - prevIndex);
v.add(s);
inString = false;
}
}
}
count = v.size();
String[] strings;
if(count != 0) {
strings = new String[count];
for (int c = 0 ; c < count; c++) {
strings[c] = (String)v.elementAt(c);
}
} else {
// This case has been observed when the value of
// 'count' recorded in the field is non-zero but
// the value portion contains all nulls.
count = 1;
strings = new String[] {""};
}
obj = strings;
} else {
obj = bvalues;
}
break;
case TIFFTag.TIFF_SHORT:
char[] cvalues = new char[count];
for (int j = 0; j < count; j++) {
cvalues[j] = (char)(stream.readUnsignedShort());
}
obj = cvalues;
break;
case TIFFTag.TIFF_LONG:
case TIFFTag.TIFF_IFD_POINTER:
long[] lvalues = new long[count];
for (int j = 0; j < count; j++) {
lvalues[j] = stream.readUnsignedInt();
}
obj = lvalues;
break;
case TIFFTag.TIFF_RATIONAL:
long[][] llvalues = new long[count][2];
for (int j = 0; j < count; j++) {
llvalues[j][0] = stream.readUnsignedInt();
llvalues[j][1] = stream.readUnsignedInt();
}
obj = llvalues;
break;
case TIFFTag.TIFF_SSHORT:
short[] svalues = new short[count];
for (int j = 0; j < count; j++) {
svalues[j] = stream.readShort();
}
obj = svalues;
break;
case TIFFTag.TIFF_SLONG:
int[] ivalues = new int[count];
for (int j = 0; j < count; j++) {
ivalues[j] = stream.readInt();
}
obj = ivalues;
break;
case TIFFTag.TIFF_SRATIONAL:
int[][] iivalues = new int[count][2];
for (int j = 0; j < count; j++) {
iivalues[j][0] = stream.readInt();
iivalues[j][1] = stream.readInt();
}
obj = iivalues;
break;
case TIFFTag.TIFF_FLOAT:
float[] fvalues = new float[count];
for (int j = 0; j < count; j++) {
fvalues[j] = stream.readFloat();
}
obj = fvalues;
break;
case TIFFTag.TIFF_DOUBLE:
double[] dvalues = new double[count];
for (int j = 0; j < count; j++) {
dvalues[j] = stream.readDouble();
}
obj = dvalues;
break;
default:
// XXX Warning
break;
}
} catch(EOFException eofe) {
// The TIFF 6.0 fields have tag numbers less than or equal
// to 532 (ReferenceBlackWhite) or equal to 33432 (Copyright).
// If there is an error reading a baseline tag, then re-throw
// the exception and fail; otherwise continue with the next
// field.
if(BaselineTIFFTagSet.getInstance().getTag(tag) == null) {
throw eofe;
}
}
if (tiffTag == null) {
// XXX Warning: unknown tag
} else if (!tiffTag.isDataTypeOK(type)) {
// XXX Warning: bad data type
} else if (tiffTag.isIFDPointer() && obj != null) {
stream.mark();
stream.seek(((long[])obj)[0]);
List tagSets = new ArrayList(1);
tagSets.add(tiffTag.getTagSet());
TIFFIFD subIFD = new TIFFIFD(tagSets);
// XXX Use same ignore policy for sub-IFD fields?
subIFD.initialize(stream, ignoreUnknownFields);
obj = subIFD;
stream.reset();
}
if (tiffTag == null) {
tiffTag = new TIFFTag(null, tag, 1 << type, null);
}
// Add the field if its contents have been initialized which
// will not be the case if an EOF was ignored above.
if(obj != null) {
TIFFField f = new TIFFField(tiffTag, type, count, obj);
addTIFFField(f);
}
stream.seek(nextTagOffset);
}
this.lastPosition = stream.getStreamPosition();
}
public void writeToStream(ImageOutputStream stream)
throws IOException {
int numFields = getNumTIFFFields();
stream.writeShort(numFields);
long nextSpace = stream.getStreamPosition() + 12*numFields + 4;
Iterator iter = iterator();
while (iter.hasNext()) {
TIFFField f = (TIFFField)iter.next();
TIFFTag tag = f.getTag();
int type = f.getType();
int count = f.getCount();
// Hack to deal with unknown tags
if (type == 0) {
type = TIFFTag.TIFF_UNDEFINED;
}
int size = count*TIFFTag.getSizeOfType(type);
if (type == TIFFTag.TIFF_ASCII) {
int chars = 0;
for (int i = 0; i < count; i++) {
chars += f.getAsString(i).length() + 1;
}
count = chars;
size = count;
}
int tagNumber = f.getTagNumber();
stream.writeShort(tagNumber);
stream.writeShort(type);
stream.writeInt(count);
// Write a dummy value to fill space
stream.writeInt(0);
stream.mark(); // Mark beginning of next field
stream.skipBytes(-4);
long pos;
if (size > 4 || tag.isIFDPointer()) {
// Ensure IFD or value is written on a word boundary
nextSpace = (nextSpace + 3) & ~0x3;
stream.writeInt((int)nextSpace);
stream.seek(nextSpace);
pos = nextSpace;
if (tag.isIFDPointer()) {
TIFFIFD subIFD = (TIFFIFD)f.getData();
subIFD.writeToStream(stream);
nextSpace = subIFD.lastPosition;
} else {
writeTIFFFieldToStream(f, stream);
nextSpace = stream.getStreamPosition();
}
} else {
pos = stream.getStreamPosition();
writeTIFFFieldToStream(f, stream);
}
// If we are writing the data for the
// StripByteCounts, TileByteCounts, StripOffsets,
// TileOffsets, JPEGInterchangeFormat, or
// JPEGInterchangeFormatLength fields, record the current stream
// position for backpatching
if (tagNumber ==
BaselineTIFFTagSet.TAG_STRIP_BYTE_COUNTS ||
tagNumber == BaselineTIFFTagSet.TAG_TILE_BYTE_COUNTS ||
tagNumber == BaselineTIFFTagSet.TAG_JPEG_INTERCHANGE_FORMAT_LENGTH) {
this.stripOrTileByteCountsPosition = pos;
} else if (tagNumber ==
BaselineTIFFTagSet.TAG_STRIP_OFFSETS ||
tagNumber ==
BaselineTIFFTagSet.TAG_TILE_OFFSETS ||
tagNumber ==
BaselineTIFFTagSet.TAG_JPEG_INTERCHANGE_FORMAT) {
this.stripOrTileOffsetsPosition = pos;
}
stream.reset(); // Go to marked position of next field
}
this.lastPosition = nextSpace;
}
public long getStripOrTileByteCountsPosition() {
return stripOrTileByteCountsPosition;
}
public long getStripOrTileOffsetsPosition() {
return stripOrTileOffsetsPosition;
}
public long getLastPosition() {
return lastPosition;
}
void setPositions(long stripOrTileOffsetsPosition,
long stripOrTileByteCountsPosition,
long lastPosition) {
this.stripOrTileOffsetsPosition = stripOrTileOffsetsPosition;
this.stripOrTileByteCountsPosition = stripOrTileByteCountsPosition;
this.lastPosition = lastPosition;
}
/**
* Returns a TIFFIFD wherein all fields from the
* BaselineTIFFTagSet are copied by value and all other
* fields copied by reference.
*/
public TIFFIFD getShallowClone() {
// Get the baseline TagSet.
TIFFTagSet baselineTagSet = BaselineTIFFTagSet.getInstance();
// If the baseline TagSet is not included just return.
List tagSetList = getTagSetList();
if(!tagSetList.contains(baselineTagSet)) {
return this;
}
// Create a new object.
TIFFIFD shallowClone = new TIFFIFD(tagSetList, getParentTag());
// Get the tag numbers in the baseline set.
Set baselineTagNumbers = baselineTagSet.getTagNumbers();
// Iterate over the fields in this IFD.
Iterator fields = iterator();
while(fields.hasNext()) {
// Get the next field.
TIFFField field = (TIFFField)fields.next();
// Get its tag number.
Integer tagNumber = new Integer(field.getTagNumber());
// Branch based on membership in baseline set.
TIFFField fieldClone;
if(baselineTagNumbers.contains(tagNumber)) {
// Copy by value.
Object fieldData = field.getData();
int fieldType = field.getType();
try {
switch (fieldType) {
case TIFFTag.TIFF_BYTE:
case TIFFTag.TIFF_SBYTE:
case TIFFTag.TIFF_UNDEFINED:
fieldData = ((byte[])fieldData).clone();
break;
case TIFFTag.TIFF_ASCII:
fieldData = ((String[])fieldData).clone();
break;
case TIFFTag.TIFF_SHORT:
fieldData = ((char[])fieldData).clone();
break;
case TIFFTag.TIFF_LONG:
case TIFFTag.TIFF_IFD_POINTER:
fieldData = ((long[])fieldData).clone();
break;
case TIFFTag.TIFF_RATIONAL:
fieldData = ((long[][])fieldData).clone();
break;
case TIFFTag.TIFF_SSHORT:
fieldData = ((short[])fieldData).clone();
break;
case TIFFTag.TIFF_SLONG:
fieldData = ((int[])fieldData).clone();
break;
case TIFFTag.TIFF_SRATIONAL:
fieldData = ((int[][])fieldData).clone();
break;
case TIFFTag.TIFF_FLOAT:
fieldData = ((float[])fieldData).clone();
break;
case TIFFTag.TIFF_DOUBLE:
fieldData = ((double[])fieldData).clone();
break;
default:
// Shouldn't happen but do nothing ...
}
} catch(Exception e) {
// Ignore it and copy by reference ...
}
fieldClone = new TIFFField(field.getTag(), fieldType,
field.getCount(), fieldData);
} else {
// Copy by reference.
fieldClone = field;
}
// Add the field to the clone.
shallowClone.addTIFFField(fieldClone);
}
// Set positions.
shallowClone.setPositions(stripOrTileOffsetsPosition,
stripOrTileByteCountsPosition,
lastPosition);
return shallowClone;
}
}
