pdtruetypefont.java

非常有用的操作pdf文件的java源码

/**
 * Copyright (c) 2003-2006, 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.fontbox.ttf.CMAPEncodingEntry;
import org.fontbox.ttf.CMAPTable;
import org.fontbox.ttf.GlyphData;
import org.fontbox.ttf.GlyphTable;
import org.fontbox.ttf.HeaderTable;
import org.fontbox.ttf.HorizontalHeaderTable;
import org.fontbox.ttf.HorizontalMetricsTable;
import org.fontbox.ttf.NamingTable;
import org.fontbox.ttf.NameRecord;
import org.fontbox.ttf.OS2WindowsMetricsTable;
import org.fontbox.ttf.PostScriptTable;
import org.fontbox.ttf.TTFParser;
import org.fontbox.ttf.TrueTypeFont;

import org.pdfbox.cos.COSDictionary;
import org.pdfbox.cos.COSName;

import org.pdfbox.pdmodel.PDDocument;

import org.pdfbox.pdmodel.common.PDRectangle;
import org.pdfbox.pdmodel.common.PDStream;

import org.pdfbox.encoding.WinAnsiEncoding;
import org.pdfbox.exceptions.WrappedIOException;

import org.pdfbox.util.ResourceLoader;

import java.awt.Font;
import java.awt.FontFormatException;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.geom.AffineTransform;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 * This is the TrueType implementation of fonts.
 *
 * @author <a href="mailto:[e-mail]">Ben Litchfield</a>
 * @version $Revision: 1.17 $
 */
public class PDTrueTypeFont extends PDSimpleFont
{
    /**
     * This is the key to a property in the Resources/PDFBox_External_Fonts.properties file
     * to load a Font when a mapping does not exist for the current font.
     */
    public static final String UNKNOWN_FONT = "UNKNOWN_FONT";
    
    private Font awtFont = null;
    
    private static Properties externalFonts = new Properties();
    private static Map loadedExternalFonts = new HashMap();
    
    static
    {
        try
        {
            ResourceLoader.loadProperties( "Resources/PDFBox_External_Fonts.properties", externalFonts );
        }
        catch( IOException io )
        {
            io.printStackTrace();
            throw new RuntimeException( "Error loading font resources" );
        }
    }
    
    
    /**
     * Constructor.
     */
    public PDTrueTypeFont()
    {
        super();
        font.setItem( COSName.SUBTYPE, COSName.TRUE_TYPE );
    }

    /**
     * Constructor.
     *
     * @param fontDictionary The font dictionary according to the PDF specification.
     */
    public PDTrueTypeFont( COSDictionary fontDictionary )
    {
        super( fontDictionary );
    }
    
    /**
     * This will load a TTF font from a font file.
     * 
     * @param doc The PDF document that will hold the embedded font.
     * @param file The file on the filesystem that holds the font file.
     * @return A true type font.
     * @throws IOException If there is an error loading the file data.
     */
    public static PDTrueTypeFont loadTTF( PDDocument doc, String file ) throws IOException
    {      
        return loadTTF( doc, new File( file ) );
    }
    
    /**
     * This will load a TTF to be embedding into a document.
     * 
     * @param doc The PDF document that will hold the embedded font. 
     * @param file A TTF file stream.
     * @return A PDF TTF.
     * @throws IOException If there is an error loading the data.
     */
    public static PDTrueTypeFont loadTTF( PDDocument doc, File file ) throws IOException
    {
        PDTrueTypeFont retval = new PDTrueTypeFont();
        PDFontDescriptorDictionary fd = new PDFontDescriptorDictionary();
        PDStream fontStream = new PDStream(doc, new FileInputStream( file ), false );
        fontStream.getStream().setInt( COSName.LENGTH1, (int)file.length() );
        fontStream.addCompression();
        fd.setFontFile2( fontStream );
        retval.setFontDescriptor( fd );
        //only support winansi encoding right now, should really
        //just use Identity-H with unicode mapping
        retval.setEncoding( new WinAnsiEncoding() );
        TrueTypeFont ttf = null;
        try
        {
            TTFParser parser = new TTFParser();
            ttf = parser.parseTTF( file );
            NamingTable naming = ttf.getNaming();
            List records = naming.getNameRecords();
            for( int i=0; i<records.size(); i++ )
            {
                NameRecord nr = (NameRecord)records.get( i );
                if( nr.getNameId() == NameRecord.NAME_POSTSCRIPT_NAME )
                {
                    retval.setBaseFont( nr.getString() );
                    fd.setFontName( nr.getString() );
                }
                else if( nr.getNameId() == NameRecord.NAME_FONT_FAMILY_NAME )
                {
                    fd.setFontFamily( nr.getString() );
                }
            }
            
            OS2WindowsMetricsTable os2 = ttf.getOS2Windows();
            fd.setNonSymbolic( true );
            switch( os2.getFamilyClass() )
            {
                case OS2WindowsMetricsTable.FAMILY_CLASS_SYMBOLIC:
                    fd.setSymbolic( true );
                    fd.setNonSymbolic( false );
                    break;
                case OS2WindowsMetricsTable.FAMILY_CLASS_SCRIPTS:
                    fd.setScript( true );
                    break;
                case OS2WindowsMetricsTable.FAMILY_CLASS_CLAREDON_SERIFS:
                case OS2WindowsMetricsTable.FAMILY_CLASS_FREEFORM_SERIFS:
                case OS2WindowsMetricsTable.FAMILY_CLASS_MODERN_SERIFS:
                case OS2WindowsMetricsTable.FAMILY_CLASS_OLDSTYLE_SERIFS:
                case OS2WindowsMetricsTable.FAMILY_CLASS_SLAB_SERIFS:
                    fd.setSerif( true );
                    break;
                default:
                    //do nothing
            }
            switch( os2.getWidthClass() )
            {
                case OS2WindowsMetricsTable.WIDTH_CLASS_ULTRA_CONDENSED:
                    fd.setFontStretch( "UltraCondensed" );
                    break;
                case OS2WindowsMetricsTable.WIDTH_CLASS_EXTRA_CONDENSED:
                    fd.setFontStretch( "ExtraCondensed" );
                    break;
                case OS2WindowsMetricsTable.WIDTH_CLASS_CONDENSED:
                    fd.setFontStretch( "Condensed" );
                    break;
                case OS2WindowsMetricsTable.WIDTH_CLASS_SEMI_CONDENSED:
                    fd.setFontStretch( "SemiCondensed" );
                    break;
                case OS2WindowsMetricsTable.WIDTH_CLASS_MEDIUM: