org.apache.poi.hwpf.usermodel.Picture Maven / Gradle / Ivy
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this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
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http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
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==================================================================== */
package org.apache.poi.hwpf.usermodel;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Arrays;
import java.util.List;
import java.util.zip.InflaterInputStream;
import org.apache.poi.ddf.EscherBSERecord;
import org.apache.poi.ddf.EscherBlipRecord;
import org.apache.poi.ddf.EscherComplexProperty;
import org.apache.poi.ddf.EscherOptRecord;
import org.apache.poi.ddf.EscherProperties;
import org.apache.poi.ddf.EscherProperty;
import org.apache.poi.ddf.EscherRecord;
import org.apache.poi.hwpf.model.PICF;
import org.apache.poi.hwpf.model.PICFAndOfficeArtData;
import org.apache.poi.util.PngUtils;
import org.apache.poi.util.POILogFactory;
import org.apache.poi.util.POILogger;
import org.apache.poi.util.StringUtil;
/**
* Represents embedded picture extracted from Word Document
*/
public final class Picture
{
@Deprecated
public static final byte[] BMP = new byte[] { 'B', 'M' };
public static final byte[] COMPRESSED1 = { (byte) 0xFE, 0x78, (byte) 0xDA };
public static final byte[] COMPRESSED2 = { (byte) 0xFE, 0x78, (byte) 0x9C };
@Deprecated
public static final byte[] EMF = { 0x01, 0x00, 0x00, 0x00 };
@Deprecated
public static final byte[] GIF = new byte[] { 'G', 'I', 'F' };
public static final byte[] IHDR = new byte[] { 'I', 'H', 'D', 'R' };
@Deprecated
public static final byte[] JPG = new byte[] { (byte) 0xFF, (byte) 0xD8 };
private static final POILogger log = POILogFactory
.getLogger( Picture.class );
@Deprecated
public static final byte[] PNG = new byte[] { (byte) 0x89, 0x50, 0x4E,
0x47, 0x0D, 0x0A, 0x1A, 0x0A };
@Deprecated
public static final byte[] TIFF = new byte[] { 0x49, 0x49, 0x2A, 0x00 };
@Deprecated
public static final byte[] TIFF1 = new byte[] { 0x4D, 0x4D, 0x00, 0x2A };
@Deprecated
public static final byte[] WMF1 = { (byte) 0xD7, (byte) 0xCD, (byte) 0xC6,
(byte) 0x9A, 0x00, 0x00 };
// Windows 3.x
@Deprecated
public static final byte[] WMF2 = { 0x01, 0x00, 0x09, 0x00, 0x00, 0x03 }; // Windows
// 3.x
private static int getBigEndianInt( byte[] data, int offset )
{
return ( ( ( data[offset] & 0xFF ) << 24 )
+ ( ( data[offset + 1] & 0xFF ) << 16 )
+ ( ( data[offset + 2] & 0xFF ) << 8 ) + ( data[offset + 3] & 0xFF ) );
}
private static int getBigEndianShort( byte[] data, int offset )
{
return ( ( ( data[offset] & 0xFF ) << 8 ) + ( data[offset + 1] & 0xFF ) );
}
private static boolean matchSignature( byte[] pictureData,
byte[] signature, int offset )
{
boolean matched = offset < pictureData.length;
for ( int i = 0; ( i + offset ) < pictureData.length
&& i < signature.length; i++ )
{
if ( pictureData[i + offset] != signature[i] )
{
matched = false;
break;
}
}
return matched;
}
private PICF _picf;
private PICFAndOfficeArtData _picfAndOfficeArtData;
private List _blipRecords;
private byte[] content;
private int dataBlockStartOfsset;
private int height = -1;
private int width = -1;
/**
* Builds a Picture object for a Picture stored as
* Escher.
* TODO We need to pass in the PICF data too somehow!
*/
public Picture( EscherBlipRecord blipRecord )
{
this._blipRecords = Arrays.asList(new EscherBlipRecord[] {blipRecord});
}
/**
* Builds a Picture object for a Picture stored in the
* DataStream
*/
public Picture( int dataBlockStartOfsset, byte[] _dataStream,
boolean fillBytes )
{
_picfAndOfficeArtData = new PICFAndOfficeArtData( _dataStream,
dataBlockStartOfsset );
_picf = _picfAndOfficeArtData.getPicf();
this.dataBlockStartOfsset = dataBlockStartOfsset;
if ( _picfAndOfficeArtData != null && _picfAndOfficeArtData.getBlipRecords() != null) {
_blipRecords = _picfAndOfficeArtData.getBlipRecords();
}
if ( fillBytes ) {
fillImageContent();
}
}
private void fillImageContent()
{
if ( content != null && content.length > 0 )
return;
byte[] rawContent = getRawContent();
/*
* HACK: Detect compressed images. In reality there should be some way
* to determine this from the first 32 bytes, but I can't see any
* similarity between all the samples I have obtained, nor any
* similarity in the data block contents.
*/
if ( matchSignature( rawContent, COMPRESSED1, 32 )
|| matchSignature( rawContent, COMPRESSED2, 32 ) )
{
try
{
InflaterInputStream in = new InflaterInputStream(
new ByteArrayInputStream( rawContent, 33,
rawContent.length - 33 ) );
ByteArrayOutputStream out = new ByteArrayOutputStream();
byte[] buf = new byte[4096];
int readBytes;
while ( ( readBytes = in.read( buf ) ) > 0 )
{
out.write( buf, 0, readBytes );
}
content = out.toByteArray();
}
catch ( IOException e )
{
/*
* Problems reading from the actual ByteArrayInputStream should
* never happen so this will only ever be a ZipException.
*/
log.log( POILogger.INFO,
"Possibly corrupt compression or non-compressed data",
e );
}
}
else
{
// Raw data is not compressed.
content = rawContent;
//PNG created on MAC may have a 16-byte prefix which prevents successful reading.
//Just cut it off!.
if (PngUtils.matchesPngHeader(content, 16))
{
byte[] png = new byte[content.length-16];
System.arraycopy(content, 16, png, 0, png.length);
content = png;
}
}
}
private void fillJPGWidthHeight()
{
/*
* http://www.codecomments.com/archive281-2004-3-158083.html
*
* Algorhitm proposed by Patrick TJ McPhee:
*
* read 2 bytes make sure they are 'ffd8'x repeatedly: read 2 bytes make
* sure the first one is 'ff'x if the second one is 'd9'x stop else if
* the second one is c0 or c2 (or possibly other values ...) skip 2
* bytes read one byte into depth read two bytes into height read two
* bytes into width else read two bytes into length skip forward
* length-2 bytes
*
* Also used Ruby code snippet from:
* http://www.bigbold.com/snippets/posts/show/805 for reference
*/
byte[] jpegContent = getContent();
int pointer = 2;
int firstByte = jpegContent[pointer];
int secondByte = jpegContent[pointer + 1];
int endOfPicture = jpegContent.length;
while ( pointer < endOfPicture - 1 )
{
do
{
firstByte = jpegContent[pointer];
secondByte = jpegContent[pointer + 1];
pointer += 2;
}
while ( !( firstByte == (byte) 0xFF ) && pointer < endOfPicture - 1 );
if ( firstByte == ( (byte) 0xFF ) && pointer < endOfPicture - 1 )
{
if ( secondByte == (byte) 0xD9 || secondByte == (byte) 0xDA )
{
break;
}
else if ( ( secondByte & 0xF0 ) == 0xC0
&& secondByte != (byte) 0xC4
&& secondByte != (byte) 0xC8
&& secondByte != (byte) 0xCC )
{
pointer += 5;
this.height = getBigEndianShort( jpegContent, pointer );
this.width = getBigEndianShort( jpegContent, pointer + 2 );
break;
}
else
{
pointer++;
pointer++;
int length = getBigEndianShort( jpegContent, pointer );
pointer += length;
}
}
else
{
pointer++;
}
}
}
void fillPNGWidthHeight()
{
byte[] pngContent = getContent();
/*
* Used PNG file format description from
* http://www.wotsit.org/download.asp?f=png
*/
int HEADER_START = PNG.length + 4;
if ( matchSignature( pngContent, IHDR, HEADER_START ) )
{
int IHDR_CHUNK_WIDTH = HEADER_START + 4;
this.width = getBigEndianInt( pngContent, IHDR_CHUNK_WIDTH );
this.height = getBigEndianInt( pngContent, IHDR_CHUNK_WIDTH + 4 );
}
}
private void fillWidthHeight()
{
PictureType pictureType = suggestPictureType();
// trying to extract width and height from pictures content:
switch ( pictureType )
{
case JPEG:
fillJPGWidthHeight();
break;
case PNG:
fillPNGWidthHeight();
break;
default:
// unsupported;
break;
}
}
/**
* @return the horizontal aspect ratio for picture provided by user
* @deprecated use more precise {@link #getHorizontalScalingFactor()}
*/
@Deprecated
public int getAspectRatioX()
{
return _picf.getMx() / 10;
}
/**
* @return the vertical aspect ratio for picture provided by user
* @deprecated use more precise {@link #getVerticalScalingFactor()}
*/
@Deprecated
public int getAspectRatioY()
{
return _picf.getMy() / 10;
}
/**
* @return picture's content as byte array
*/
public byte[] getContent()
{
fillImageContent();
return content;
}
/**
* @return The amount the picture has been cropped on the left in twips
*/
@Deprecated
public int getDxaCropLeft()
{
// TODO: use new properties
// if (_picfAndOfficeArtData == null || _picfAndOfficeArtData.getShape()
// == null)
// return 0;
//
// final EscherContainerRecord shape = _picfAndOfficeArtData.getShape();
// EscherOptRecord optRecord = shape.getChildById( (short) 0xF00B );
// if (optRecord == null)
// return 0;
//
// EscherProperty property = optRecord.lookup( 0x0102 );
// if (property == null || !(property instanceof EscherSimpleProperty))
// return 0;
//
// EscherSimpleProperty simpleProperty = (EscherSimpleProperty)
// property;
// return simpleProperty.getPropertyValue();
return _picf.getDxaReserved1();
}
/**
* @return The amount the picture has been cropped on the right in twips
*/
@Deprecated
public int getDxaCropRight()
{
return _picf.getDxaReserved2();
}
/**
* Gets the initial width of the picture, in twips, prior to cropping or
* scaling.
*
* @return the initial width of the picture in twips
*/
public int getDxaGoal()
{
return _picf.getDxaGoal();
}
/**
* @return The amount the picture has been cropped on the bottom in twips
*/
@Deprecated
public int getDyaCropBottom()
{
return _picf.getDyaReserved2();
}
/**
* @return The amount the picture has been cropped on the top in twips
*/
@Deprecated
public int getDyaCropTop()
{
return _picf.getDyaReserved1();
}
/**
* Gets the initial height of the picture, in twips, prior to cropping or
* scaling.
*
* @return the initial width of the picture in twips
*/
public int getDyaGoal()
{
return _picf.getDyaGoal();
}
/**
* returns pixel height of the picture or -1 if dimensions determining was
* failed
*/
public int getHeight()
{
if ( height == -1 )
{
fillWidthHeight();
}
return height;
}
/**
* @return Horizontal scaling factor supplied by user expressed in .001%
* units
*/
public int getHorizontalScalingFactor()
{
return _picf.getMx();
}
/**
* Returns the MIME type for the image
*
* @return MIME-type for known types of image or "image/unknown" if unknown
*/
public String getMimeType()
{
return suggestPictureType().getMime();
}
/**
* Returns picture's content as it stored in Word file, i.e. possibly in
* compressed form.
*
* @return picture's content as it stored in Word file
*/
public byte[] getRawContent()
{
if (_blipRecords == null || _blipRecords.size() != 1) {
return new byte[0];
}
EscherRecord escherRecord = _blipRecords.get( 0 );
if ( escherRecord instanceof EscherBlipRecord )
{
return ( (EscherBlipRecord) escherRecord ).getPicturedata();
}
if ( escherRecord instanceof EscherBSERecord )
{
return ( (EscherBSERecord) escherRecord ).getBlipRecord()
.getPicturedata();
}
return new byte[0];
}
/**
*
* @return size in bytes of the picture
*/
public int getSize()
{
return getContent().length;
}
/**
* @return The offset of this picture in the picture bytes, used when
* matching up with {@link CharacterRun#getPicOffset()}
*/
public int getStartOffset()
{
return dataBlockStartOfsset;
}
/**
* @return Vertical scaling factor supplied by user expressed in .001% units
*/
public int getVerticalScalingFactor()
{
return _picf.getMy();
}
/**
* returns pixel width of the picture or -1 if dimensions determining was
* failed
*/
public int getWidth()
{
if ( width == -1 )
{
fillWidthHeight();
}
return width;
}
/**
* returns the description stored in the alternative text
*
* @return pictue description
*/
public String getDescription()
{
for(EscherRecord escherRecord : _picfAndOfficeArtData.getShape().getChildRecords()){
if(escherRecord instanceof EscherOptRecord){
EscherOptRecord escherOptRecord = (EscherOptRecord) escherRecord;
for(EscherProperty property : escherOptRecord.getEscherProperties()){
if(EscherProperties.GROUPSHAPE__DESCRIPTION == property.getPropertyNumber()){
byte[] complexData = ((EscherComplexProperty)property).getComplexData();
return StringUtil.getFromUnicodeLE(complexData,0,complexData.length/2-1);
}
}
}
}
return null;
}
/**
* tries to suggest extension for picture's file by matching signatures of
* popular image formats to first bytes of picture's contents
*
* @return suggested file extension
*/
public String suggestFileExtension()
{
return suggestPictureType().getExtension();
}
/**
* Tries to suggest a filename: hex representation of picture structure
* offset in "Data" stream plus extension that is tried to determine from
* first byte of picture's content.
*
* @return suggested file name
*/
public String suggestFullFileName()
{
String fileExt = suggestFileExtension();
return Integer.toHexString( dataBlockStartOfsset )
+ ( fileExt.length() > 0 ? "." + fileExt : "" );
}
public PictureType suggestPictureType()
{
if (_blipRecords == null || _blipRecords.size() != 1 ) {
return PictureType.UNKNOWN;
}
EscherRecord escherRecord = _blipRecords.get( 0 );
switch ( escherRecord.getRecordId() )
{
case (short) 0xF007:
{
EscherBSERecord bseRecord = (EscherBSERecord) escherRecord;
switch ( bseRecord.getBlipTypeWin32() )
{
case 0x00:
return PictureType.UNKNOWN;
case 0x01:
return PictureType.UNKNOWN;
case 0x02:
return PictureType.EMF;
case 0x03:
return PictureType.WMF;
case 0x04:
return PictureType.PICT;
case 0x05:
return PictureType.JPEG;
case 0x06:
return PictureType.PNG;
case 0x07:
return PictureType.BMP;
case 0x11:
return PictureType.TIFF;
case 0x12:
return PictureType.JPEG;
default:
return PictureType.UNKNOWN;
}
}
case (short) 0xF01A:
return PictureType.EMF;
case (short) 0xF01B:
return PictureType.WMF;
case (short) 0xF01C:
return PictureType.PICT;
case (short) 0xF01D:
return PictureType.JPEG;
case (short) 0xF01E:
return PictureType.PNG;
case (short) 0xF01F:
return PictureType.BMP;
case (short) 0xF029:
return PictureType.TIFF;
case (short) 0xF02A:
return PictureType.JPEG;
default:
return PictureType.UNKNOWN;
}
}
/**
* Writes Picture's content bytes to specified OutputStream. Is useful when
* there is need to write picture bytes directly to stream, omitting its
* representation in memory as distinct byte array.
*
* @param out
* a stream to write to
* @throws IOException
* if some exception is occured while writing to specified out
*/
public void writeImageContent( OutputStream out ) throws IOException
{
byte[] content = getContent();
if ( content != null && content.length > 0 )
{
out.write( content, 0, content.length );
}
}
}
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