diff options
Diffstat (limited to 'src/main/java/org/pdfbox/pdmodel/font/PDFont.java')
| -rw-r--r-- | src/main/java/org/pdfbox/pdmodel/font/PDFont.java | 863 |
1 files changed, 863 insertions, 0 deletions
diff --git a/src/main/java/org/pdfbox/pdmodel/font/PDFont.java b/src/main/java/org/pdfbox/pdmodel/font/PDFont.java new file mode 100644 index 0000000..593c8b0 --- /dev/null +++ b/src/main/java/org/pdfbox/pdmodel/font/PDFont.java @@ -0,0 +1,863 @@ +/**
+ * 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.pdmodel.font;
+
+import org.pdfbox.afmparser.AFMParser;
+
+import org.pdfbox.afmtypes.FontMetric;
+
+import org.pdfbox.cmapparser.CMapParser;
+
+import org.pdfbox.cmaptypes.CMap;
+
+import org.pdfbox.encoding.AFMEncoding;
+import org.pdfbox.encoding.DictionaryEncoding;
+import org.pdfbox.encoding.Encoding;
+import org.pdfbox.encoding.EncodingManager;
+
+import org.pdfbox.cos.COSArray;
+import org.pdfbox.cos.COSBase;
+import org.pdfbox.cos.COSDictionary;
+import org.pdfbox.cos.COSFloat;
+import org.pdfbox.cos.COSName;
+import org.pdfbox.cos.COSNumber;
+import org.pdfbox.cos.COSStream;
+
+import org.pdfbox.pdmodel.common.COSArrayList;
+import org.pdfbox.pdmodel.common.COSObjectable;
+import org.pdfbox.pdmodel.common.PDMatrix;
+import org.pdfbox.pdmodel.common.PDRectangle;
+
+import org.pdfbox.util.ResourceLoader;
+
+import org.apache.log4j.Logger;
+
+import java.awt.Graphics;
+
+import java.io.BufferedReader;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.IOException;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.StringTokenizer;
+
+/**
+ * This is the base class for all PDF fonts.
+ *
+ * @author Ben Litchfield (ben@csh.rit.edu)
+ * @version $Revision: 1.32 $
+ */
+public abstract class PDFont implements COSObjectable
+{
+ private static Logger log = Logger.getLogger(PDFont.class);
+
+ /**
+ * The cos dictionary for this font.
+ */
+ protected COSDictionary font;
+
+ /**
+ * This is only used if this is a font object and it has an encoding.
+ */
+ private Encoding fontEncoding = null;
+ /**
+ * This is only used if this is a font object and it has an encoding and it is
+ * a type0 font with a cmap.
+ */
+ private CMap cmap = null;
+
+ private static Map afmResources = null;
+ private static Map cmapObjects = null;
+ private static Map afmObjects = null;
+ private static Map cmapSubstitutions = null;
+
+ static
+ {
+ //these are read-only once they are created
+ afmResources = new HashMap();
+ cmapSubstitutions = new HashMap();
+
+ //these are read-write
+ cmapObjects = Collections.synchronizedMap( new HashMap() );
+ afmObjects = Collections.synchronizedMap( new HashMap() );
+
+
+ afmResources.put( COSName.getPDFName( "Courier-Bold" ), "Resources/afm/Courier-Bold.afm" );
+ afmResources.put( COSName.getPDFName( "Courier-BoldOblique" ), "Resources/afm/Courier-BoldOblique.afm" );
+ afmResources.put( COSName.getPDFName( "Courier" ), "Resources/afm/Courier.afm" );
+ afmResources.put( COSName.getPDFName( "Courier-Oblique" ), "Resources/afm/Courier-Oblique.afm" );
+ afmResources.put( COSName.getPDFName( "Helvetica" ), "Resources/afm/Helvetica.afm" );
+ afmResources.put( COSName.getPDFName( "Helvetica-Bold" ), "Resources/afm/Helvetica-Bold.afm" );
+ afmResources.put( COSName.getPDFName( "Helvetica-BoldOblique" ), "Resources/afm/Helvetica-BoldOblique.afm" );
+ afmResources.put( COSName.getPDFName( "Helvetica-Oblique" ), "Resources/afm/Helvetica-Oblique.afm" );
+ afmResources.put( COSName.getPDFName( "Symbol" ), "Resources/afm/Symbol.afm" );
+ afmResources.put( COSName.getPDFName( "Times-Bold" ), "Resources/afm/Times-Bold.afm" );
+ afmResources.put( COSName.getPDFName( "Times-BoldItalic" ), "Resources/afm/Times-BoldItalic.afm" );
+ afmResources.put( COSName.getPDFName( "Times-Italic" ), "Resources/afm/Times-Italic.afm" );
+ afmResources.put( COSName.getPDFName( "Times-Roman" ), "Resources/afm/Times-Roman.afm" );
+ afmResources.put( COSName.getPDFName( "ZapfDingbats" ), "Resources/afm/ZapfDingbats.afm" );
+
+ cmapSubstitutions.put( "ETenms-B5-H", "ETen-B5-H" );
+ cmapSubstitutions.put( "ETenms-B5-V", "ETen-B5-V" );
+ }
+
+ /**
+ * This will clear AFM resources that are stored statically.
+ * This is usually not a problem unless you want to reclaim
+ * resources for a long running process.
+ *
+ * SPECIAL NOTE: The font calculations are currently in COSObject, which
+ * is where they will reside until PDFont is mature enough to take them over.
+ * PDFont is the appropriate place for them and not in COSObject but we need font
+ * calculations for text extractaion. THIS METHOD WILL BE MOVED OR REMOVED
+ * TO ANOTHER LOCATION IN A FUTURE VERSION OF PDFBOX.
+ */
+ public static void clearResources()
+ {
+ afmObjects.clear();
+ cmapObjects.clear();
+ }
+
+ /**
+ * Constructor.
+ */
+ public PDFont()
+ {
+ font = new COSDictionary();
+ font.setItem( COSName.TYPE, COSName.FONT );
+ }
+
+ /**
+ * Constructor.
+ *
+ * @param fontDictionary The font dictionary according to the PDF specification.
+ */
+ public PDFont( COSDictionary fontDictionary )
+ {
+ font = fontDictionary;
+ }
+
+ /**
+ * @see COSObjectable#getCOSObject()
+ */
+ public COSBase getCOSObject()
+ {
+ return font;
+ }
+
+ /**
+ * This will get the font width for a character.
+ *
+ * @param c The character code to get the width for.
+ * @param offset The offset into the array.
+ * @param length The length of the data.
+ *
+ * @return The width is in 1000 unit of text space, ie 333 or 777
+ *
+ * @throws IOException If an error occurs while parsing.
+ */
+ public abstract float getFontWidth( byte[] c, int offset, int length ) throws IOException;
+
+ /**
+ * This will get the width of this string for this font.
+ *
+ * @param string The string to get the width of.
+ *
+ * @return The width of the string in 1000 units of text space, ie 333 567...
+ *
+ * @throws IOException If there is an error getting the width information.
+ */
+ public float getStringWidth( String string ) throws IOException
+ {
+ byte[] data = string.getBytes();
+ float totalWidth = 0;
+ for( int i=0; i<data.length; i++ )
+ {
+ totalWidth+=getFontWidth( data, i, 1 );
+ }
+ return totalWidth;
+ }
+
+ /**
+ * This will get the average font width for all characters.
+ *
+ * @return The width is in 1000 unit of text space, ie 333 or 777
+ *
+ * @throws IOException If an error occurs while parsing.
+ */
+ public abstract float getAverageFontWidth() throws IOException;
+
+ /**
+ * This will draw a string on a canvas using the font.
+ *
+ * @param string The string to draw.
+ * @param g The graphics to draw onto.
+ * @param fontSize The size of the font to draw.
+ * @param xScale The x scaling percent.
+ * @param yScale The y scaling percent.
+ * @param x The x coordinate to draw at.
+ * @param y The y coordinate to draw at.
+ *
+ * @throws IOException If there is an error drawing the specific string.
+ */
+ public abstract void drawString( String string, Graphics g, float fontSize,
+ float xScale, float yScale, float x, float y ) throws IOException;
+
+ /**
+ * Used for multibyte encodings.
+ *
+ * @param data The array of data.
+ * @param offset The offset into the array.
+ * @param length The number of bytes to use.
+ *
+ * @return The int value of data from the array.
+ */
+ protected int getCodeFromArray( byte[] data, int offset, int length )
+ {
+ int code = 0;
+ for( int i=0; i<length; i++ )
+ {
+ code <<= 8;
+ code = (data[offset+i]+256)%256;
+ }
+ return code;
+ }
+
+ /**
+ * This will attempt to get the font width from an AFM file.
+ *
+ * @param code The character code we are trying to get.
+ *
+ * @return The font width from the AFM file.
+ *
+ * @throws IOException if we cannot find the width.
+ */
+ protected float getFontWidthFromAFMFile( int code ) throws IOException
+ {
+ float retval = 0;
+ FontMetric metric = getAFM();
+ if( metric != null )
+ {
+ Encoding encoding = getEncoding();
+ COSName characterName = encoding.getName( code );
+ retval = metric.getCharacterWidth( characterName.getName() );
+ }
+ return retval;
+ }
+
+ /**
+ * This will attempt to get the average font width from an AFM file.
+ *
+ * @return The average font width from the AFM file.
+ *
+ * @throws IOException if we cannot find the width.
+ */
+ protected float getAverageFontWidthFromAFMFile() throws IOException
+ {
+ float retval = 0;
+ FontMetric metric = getAFM();
+ if( metric != null )
+ {
+ retval = metric.getAverageCharacterWidth();
+ }
+ return retval;
+ }
+
+ /**
+ * This will get an AFM object if one exists.
+ *
+ * @return The afm object from the name.
+ *
+ * @throws IOException If there is an error getting the AFM object.
+ */
+ protected FontMetric getAFM() throws IOException
+ {
+ COSName name = (COSName)font.getDictionaryObject( COSName.BASE_FONT );
+ FontMetric result = null;
+ if( name != null )
+ {
+ result = (FontMetric)afmObjects.get( name );
+ if( result == null )
+ {
+ String resource = (String)afmResources.get( name );
+ if( log.isDebugEnabled() )
+ {
+ log.debug("resource: " + resource + ", name: " + name.getName());
+ }
+ if( resource == null )
+ {
+ if( log.isDebugEnabled() )
+ {
+ log.debug( "resource is null" );
+ }
+ //ok for now
+ //throw new IOException( "Unknown AFM font '" + name.getName() + "'" );
+ }
+ else
+ {
+ InputStream afmStream = ResourceLoader.loadResource( resource );
+ if( afmStream == null )
+ {
+ throw new IOException( "Can't handle font width:" + resource );
+ }
+ AFMParser parser = new AFMParser( afmStream );
+ parser.parse();
+ result = parser.getResult();
+ afmObjects.put( name, result );
+ }
+ }
+ }
+ return result;
+ }
+
+ /**
+ * This will perform the encoding of a character if needed.
+ *
+ * @param c The character to encode.
+ * @param offset The offset into the array to get the data
+ * @param length The number of bytes to read.
+ *
+ * @return The value of the encoded character.
+ *
+ * @throws IOException If there is an error during the encoding.
+ */
+ public String encode( byte[] c, int offset, int length ) throws IOException
+ {
+ String retval = null;
+ COSName fontSubtype = (COSName)font.getDictionaryObject( COSName.SUBTYPE );
+ String fontSubtypeName = fontSubtype.getName();
+ if( fontSubtypeName.equals( "Type0" ) ||
+ fontSubtypeName.equals( "Type1" ) ||
+ fontSubtypeName.equals( "TrueType" ))
+ {
+ if( cmap == null )
+ {
+ if( font.getDictionaryObject( COSName.TO_UNICODE ) != null )
+ {
+ COSStream toUnicode = (COSStream)font.getDictionaryObject( COSName.TO_UNICODE );
+ if( toUnicode != null )
+ {
+ parseCmap( toUnicode.getUnfilteredStream(), null );
+ if( log.isDebugEnabled() )
+ {
+ log.debug( "Getting embedded CMAP Stream from ToUnicode" );
+ }
+ }
+ }
+ else
+ {
+ COSBase encoding = font.getDictionaryObject( COSName.ENCODING );
+ if( encoding instanceof COSStream )
+ {
+ COSStream encodingStream = (COSStream)encoding;
+ parseCmap( encodingStream.getUnfilteredStream(), null );
+ if( log.isDebugEnabled() )
+ {
+ log.debug( "Getting embedded CMAP Stream from encoding" );
+ }
+ }
+ else if( fontSubtypeName.equals( "Type0" ) &&
+ encoding instanceof COSName )
+ {
+ COSName encodingName = (COSName)encoding;
+ cmap = (CMap)cmapObjects.get( encodingName );
+ if( cmap != null )
+ {
+ cmap = (CMap)cmapObjects.get( encodingName );
+ }
+ else
+ {
+ if( log.isDebugEnabled() )
+ {
+ log.debug( "Getting CMAP Stream from resource" );
+ }
+ String cmapName = encodingName.getName();
+ cmapName = performCMAPSubstitution( cmapName );
+ String resourceName = "Resources/cmap/" + cmapName;
+ parseCmap( ResourceLoader.loadResource( resourceName ), encodingName );
+ if( cmap == null && !encodingName.getName().equals( COSName.IDENTITY_H.getName() ) )
+ {
+ throw new IOException( "Error: Could not find predefined " +
+ "CMAP file for '" + encodingName.getName() + "'" );
+ }
+ }
+ }
+ else if( encoding instanceof COSName ||
+ encoding instanceof COSDictionary )
+ {
+ Encoding currentFontEncoding = getEncoding();
+ if( currentFontEncoding != null )
+ {
+ retval = currentFontEncoding.getCharacter( getCodeFromArray( c, offset, length ) );
+ }
+ }
+ else
+ {
+ COSDictionary fontDescriptor =
+ (COSDictionary)font.getDictionaryObject( COSName.FONT_DESC );
+ if( fontSubtypeName.equals( "TrueType" ) &&
+ fontDescriptor != null &&
+ (fontDescriptor.getDictionaryObject( COSName.FONT_FILE )!= null ||
+ fontDescriptor.getDictionaryObject( COSName.FONT_FILE2 ) != null ||
+ fontDescriptor.getDictionaryObject( COSName.FONT_FILE3 ) != null ) )
+ {
+ //If we are using an embedded font then there is not much we can do besides
+ //return the same character codes.
+ //retval = new String( c,offset, length );
+ retval = getStringFromArray( c, offset, length );
+ }
+ else
+ {
+ //this case will be handled below after checking the cmap
+ }
+ }
+ }
+
+
+ }
+ }
+ if( log.isDebugEnabled() )
+ {
+ log.debug( "retval=" + retval + " cmap=" + cmap);
+ }
+ if( retval == null && cmap != null )
+ {
+
+ retval = cmap.lookup( c, offset, length );
+ if( log.isDebugEnabled() )
+ {
+ log.debug( "cmap.lookup(" +c + ")='" +retval + "'" );
+ }
+ }
+ //if we havn't found a value yet and
+ //we are still on the first byte and
+ //there is no cmap or the cmap does not have 2 byte mappings then try to encode
+ //using fallback methods.
+ if( retval == null &&
+ length == 1 &&
+ (cmap == null || !cmap.hasTwoByteMappings()))
+ {
+ if( log.isDebugEnabled() )
+ {
+ log.debug( "No CMAP: Using fallback method");
+ }
+ Encoding encoding = getEncoding();
+ if( encoding != null )
+ {
+ retval = encoding.getCharacter( getCodeFromArray( c, offset, length ) );
+ }
+ if( retval == null )
+ {
+ retval = getStringFromArray( c, offset, length );
+ }
+ }
+ return retval;
+ }
+
+ private static final String[] SINGLE_CHAR_STRING = new String[256];
+ private static final String[][] DOUBLE_CHAR_STRING = new String[256][256];
+ static
+ {
+ for( int i=0; i<256; i++ )
+ {
+ SINGLE_CHAR_STRING[i] = new String( new byte[] {(byte)i} );
+ for( int j=0; j<256; j++ )
+ {
+ DOUBLE_CHAR_STRING[i][j] = new String( new byte[] {(byte)i, (byte)j} );
+ }
+ }
+ }
+
+ private static String getStringFromArray( byte[] c, int offset, int length ) throws IOException
+ {
+ String retval = null;
+ if( length == 1 )
+ {
+ retval = SINGLE_CHAR_STRING[(c[offset]+256)%256];
+ }
+ else if( length == 2 )
+ {
+ retval = DOUBLE_CHAR_STRING[(c[offset]+256)%256][(c[offset+1]+256)%256];
+ }
+ else
+ {
+ throw new IOException( "Error:Unknown character length:" + length );
+ }
+ return retval;
+ }
+
+ /**
+ * Some cmap names are synonyms for other CMAPs. If that is the case
+ * then this method will perform that substitution.
+ *
+ * @param cmapName The name of the cmap to attempt to look up.
+ *
+ * @return Either the original name or the substituted name.
+ */
+ private String performCMAPSubstitution( String cmapName )
+ {
+ String retval = (String)cmapSubstitutions.get( cmapName );
+ if( retval == null )
+ {
+ //if there is no substitution then just return the same value.
+ retval = cmapName;
+ }
+ return retval;
+ }
+
+ private void parseCmap( InputStream cmapStream, COSName encodingName ) throws IOException
+ {
+ if( log.isDebugEnabled() )
+ {
+ log.debug( "Parsing a new CMAP for font:" + font );
+ }
+ if( cmapStream != null )
+ {
+ CMapParser parser = new CMapParser( cmapStream, null );
+ parser.parse();
+ cmap = parser.getResult();
+ if( encodingName != null )
+ {
+ cmapObjects.put( encodingName, cmap );
+ }
+ }
+ }
+
+ /**
+ * The will set the encoding for this font.
+ *
+ * @param enc The font encoding.
+ */
+ public void setEncoding( Encoding enc )
+ {
+ font.setItem( COSName.ENCODING, enc );
+ fontEncoding = enc;
+ }
+
+ /**
+ * This will get or create the encoder.
+ *
+ * modified by Christophe Huault : DGBS Strasbourg huault@free.fr october 2004
+ *
+ * @return The encoding to use.
+ *
+ * @throws IOException If there is an error getting the encoding.
+ */
+ public Encoding getEncoding() throws IOException
+ {
+ EncodingManager manager = new EncodingManager();
+ if( fontEncoding == null )
+ {
+ COSBase encoding = font.getDictionaryObject( COSName.ENCODING );
+ if( encoding == null )
+ {
+ FontMetric metric = getAFM();
+ if( metric != null )
+ {
+ fontEncoding = new AFMEncoding( metric );
+ }
+ if( fontEncoding == null )
+ {
+ fontEncoding = manager.getStandardEncoding();
+ }
+ }
+ /**
+ * Si la clé /Encoding existe dans le dictionnaire fonte il y a deux possibilités :
+ * 1er cas : elle est associé à une reference contenant un dictionnaire de type encoding.
+ * Ce dictionnaire PDF est représenté par un DictionaryEncoding.
+ * If the /Encoding Key does exist in the font dictionary, there are two cases :
+ * case one : The value associated with /Encoding is a reference to a dictionary.
+ * This dictionary is represented by an instance of DictionaryEncoding class
+ */
+ else if( encoding instanceof COSDictionary )
+ {
+ COSDictionary encodingDic = (COSDictionary)encoding;
+ //Let's see if the encoding dictionary has a base encoding
+ //If it does not then we will attempt to get it from the font
+ //file
+ COSName baseEncodingName = (COSName) encodingDic.getDictionaryObject(
+ COSName.BASE_ENCODING);
+ //on ajoute une entrée /BaseEncoding dans /Encoding uniquement si elle en est absente
+ //if not find in Encoding dictinary target, we try to find it from else where
+ if( baseEncodingName == null)
+ {
+ COSName fontEncodingFromFile = getEncodingFromFont();
+ encodingDic.setItem(
+ COSName.BASE_ENCODING,
+ fontEncodingFromFile );
+ }
+ fontEncoding = new DictionaryEncoding( encodingDic );
+ }
+ else if( encoding instanceof COSName )
+ {
+ if( !encoding.equals( COSName.IDENTITY_H ) )
+ {
+ fontEncoding = manager.getEncoding( (COSName)encoding );
+ }
+ }
+ else
+ {
+ throw new IOException( "Unexpected encoding type:" + encoding.getClass().getName() );
+ }
+ }
+ return fontEncoding;
+ }
+
+ /**
+ * This will always return "Font" for fonts.
+ *
+ * @return The type of object that this is.
+ */
+ public String getType()
+ {
+ return font.getNameAsString( COSName.TYPE );
+ }
+
+ /**
+ * This will get the subtype of font, Type1, Type3, ...
+ *
+ * @return The type of font that this is.
+ */
+ public String getSubType()
+ {
+ return font.getNameAsString( COSName.SUBTYPE );
+ }
+
+ /**
+ * The PostScript name of the font.
+ *
+ * @return The postscript name of the font.
+ */
+ public String getBaseFont()
+ {
+ return font.getNameAsString( COSName.BASE_FONT );
+ }
+
+ /**
+ * Set the PostScript name of the font.
+ *
+ * @param baseFont The postscript name for the font.
+ */
+ public void setBaseFont( String baseFont )
+ {
+ font.setName( COSName.BASE_FONT, baseFont );
+ }
+
+ /**
+ * The code for the first char or -1 if there is none.
+ *
+ * @return The code for the first character.
+ */
+ public int getFirstChar()
+ {
+ return font.getInt( COSName.FIRST_CHAR, -1 );
+ }
+
+ /**
+ * Set the first character this font supports.
+ *
+ * @param firstChar The first character.
+ */
+ public void setFirstChar( int firstChar )
+ {
+ font.setInt( COSName.FIRST_CHAR, firstChar );
+ }
+
+ /**
+ * The code for the last char or -1 if there is none.
+ *
+ * @return The code for the last character.
+ */
+ public int getLastChar()
+ {
+ return font.getInt( COSName.LAST_CHAR, -1 );
+ }
+
+ /**
+ * Set the last character this font supports.
+ *
+ * @param lastChar The last character.
+ */
+ public void setLastChar( int lastChar )
+ {
+ font.setInt( COSName.LAST_CHAR, lastChar );
+ }
+
+ /**
+ * The widths of the characters. This will be null for the standard 14 fonts.
+ *
+ * @return The widths of the characters.
+ */
+ public List getWidths()
+ {
+ COSArray array = (COSArray)font.getDictionaryObject( COSName.WIDTHS );
+ return COSArrayList.convertFloatCOSArrayToList( array );
+ }
+
+ /**
+ * Set the widths of the characters code.
+ *
+ * @param widths The widths of the character codes.
+ */
+ public void setWidths( List widths )
+ {
+ font.setItem( COSName.WIDTHS, COSArrayList.converterToCOSArray( widths ) );
+ }
+
+ /**
+ * This will get the matrix that is used to transform glyph space to
+ * text space. By default there are 1000 glyph units to 1 text space
+ * unit, but type3 fonts can use any value.
+ *
+ * Note:If this is a type3 font then it can be modified via the PDType3Font.setFontMatrix, otherwise this
+ * is a read-only property.
+ *
+ * @return The matrix to transform from glyph space to text space.
+ */
+ public PDMatrix getFontMatrix()
+ {
+ PDMatrix matrix = null;
+ COSArray array = (COSArray)font.getDictionaryObject( COSName.FONT_MATRIX );
+ if( array == null )
+ {
+ array = new COSArray();
+ array.add( new COSFloat( 0.001f ) );
+ array.add( COSNumber.ZERO );
+ array.add( COSNumber.ZERO );
+ array.add( new COSFloat( 0.001f ) );
+ array.add( COSNumber.ZERO );
+ array.add( COSNumber.ZERO );
+ }
+ matrix = new PDMatrix(array);
+
+ return matrix;
+ }
+
+ /**
+ * Try to get the encoding for the font and add it to the target
+ * the target must be an an Encoding Dictionary.
+ *
+ * added by Christophe Huault : DGBS Strasbourg huault@free.fr october 2004
+ *
+ * @return The encoding from the font.
+ *
+ * @throws IOException If there is an error reading the file.
+ */
+ private COSName getEncodingFromFont() throws IOException
+ {
+ //This whole section of code needs to be replaced with an actual
+ //type1 font parser!!
+
+
+ COSName retvalue = null;
+ //recuperer le programme de fonte dans son stream qui doit se trouver
+ //dans le flux référencé par à la clé FileFont lui même situé dans
+ //le dictionnaire associé à /FontDescriptor du dictionnaire de type /Font courrant
+ //get the font program in the stream which should be located in
+ //the /FileFont Stream object himself in the /FontDescriptior of the current
+ //font dictionary
+ COSDictionary fontDescriptor = (COSDictionary) font.getDictionaryObject(
+ COSName.FONT_DESC);
+ if( fontDescriptor != null )
+ {
+ COSStream fontFile = (COSStream) fontDescriptor.getDictionaryObject(
+ COSName.FONT_FILE);
+ if( fontFile != null )
+ {
+ BufferedReader in =
+ new BufferedReader(new InputStreamReader(fontFile.getUnfilteredStream()));
+ /**
+ * this section parse the FileProgram stream searching for a /Encoding entry
+ * the research stop if the entry "currentdict end" is reach or after 100 lignes
+ */
+ StringTokenizer st = null;
+ boolean found = false;
+ String line = "";
+ String key = null;
+ for( int i = 0; null!=( line = in.readLine() ) &&
+ i < 40 &&
+ !line.equals("currentdict end")
+ && !found; i++)
+ {
+ st = new StringTokenizer(line);
+ if( st.hasMoreTokens() )
+ {
+ key = st.nextToken();
+ if(key.equals("/Encoding") && st.hasMoreTokens() )
+ {
+ COSName value = COSName.getPDFName( st.nextToken() );
+ found = true;
+ if( value.equals( COSName.MAC_ROMAN_ENCODING ) ||
+ value.equals( COSName.PDF_DOC_ENCODING ) ||
+ value.equals( COSName.STANDARD_ENCODING ) ||
+ value.equals( COSName.WIN_ANSI_ENCODING ) )
+ {
+ //value is expected to be one of the encodings
+ //ie. StandardEncoding,WinAnsiEncoding,MacRomanEncoding,PDFDocEncoding
+ retvalue = value;
+ }
+ }
+ }
+ }
+ }
+ }
+ return retvalue;
+ }
+
+ /**
+ * This will get the fonts bouding box.
+ *
+ * @return The fonts bouding box.
+ *
+ * @throws IOException If there is an error getting the bounding box.
+ */
+ public abstract PDRectangle getFontBoundingBox() throws IOException;
+
+ /**
+ * @see Object#equals( Object )
+ */
+ public boolean equals( Object other )
+ {
+ return other instanceof PDFont && ((PDFont)other).getCOSObject() == this.getCOSObject();
+ }
+
+ /**
+ * @see Object#hashCode()
+ */
+ public int hashCode()
+ {
+ return this.getCOSObject().hashCode();
+ }
+}
\ No newline at end of file |