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iText, a free Java-PDF library
/*
* $Id: TrueTypeFontUnicode.java 6739 2015-02-01 19:02:41Z psoares33 $
*
* This file is part of the iText (R) project.
* Copyright (c) 1998-2014 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.text.pdf;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Utilities;
import com.itextpdf.text.error_messages.MessageLocalization;
import com.itextpdf.text.pdf.fonts.otf.GlyphSubstitutionTableReader;
import com.itextpdf.text.pdf.fonts.otf.Language;
import java.io.IOException;
import java.util.Arrays;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/** Represents a True Type font with Unicode encoding. All the character
* in the font can be used directly by using the encoding Identity-H or
* Identity-V. This is the only way to represent some character sets such
* as Thai.
* @author Paulo Soares
*/
class TrueTypeFontUnicode extends TrueTypeFont implements Comparator{
private static final List SUPPORTED_LANGUAGES_FOR_OTF = Arrays.asList(Language.BENGALI);
private Map glyphSubstitutionMap;
private Language supportedLanguage;
/**
* Creates a new TrueType font addressed by Unicode characters. The font
* will always be embedded.
* @param ttFile the location of the font on file. The file must end in '.ttf'.
* The modifiers after the name are ignored.
* @param enc the encoding to be applied to this font
* @param emb true if the font is to be embedded in the PDF
* @param ttfAfm the font as a byte array
* @throws DocumentException the font is invalid
* @throws IOException the font file could not be read
*/
TrueTypeFontUnicode(String ttFile, String enc, boolean emb, byte ttfAfm[], boolean forceRead) throws DocumentException, IOException {
String nameBase = getBaseName(ttFile);
String ttcName = getTTCName(nameBase);
if (nameBase.length() < ttFile.length()) {
style = ttFile.substring(nameBase.length());
}
encoding = enc;
embedded = emb;
fileName = ttcName;
ttcIndex = "";
if (ttcName.length() < nameBase.length())
ttcIndex = nameBase.substring(ttcName.length() + 1);
fontType = FONT_TYPE_TTUNI;
if ((fileName.toLowerCase().endsWith(".ttf") || fileName.toLowerCase().endsWith(".otf") || fileName.toLowerCase().endsWith(".ttc")) && (enc.equals(IDENTITY_H) || enc.equals(IDENTITY_V)) && emb) {
process(ttfAfm, forceRead);
if (os_2.fsType == 2)
throw new DocumentException(MessageLocalization.getComposedMessage("1.cannot.be.embedded.due.to.licensing.restrictions", fileName + style));
// Sivan
if (cmap31 == null && !fontSpecific || cmap10 == null && fontSpecific)
directTextToByte=true;
//throw new DocumentException(MessageLocalization.getComposedMessage("1.2.does.not.contain.an.usable.cmap", fileName, style));
if (fontSpecific) {
fontSpecific = false;
String tempEncoding = encoding;
encoding = "";
createEncoding();
encoding = tempEncoding;
fontSpecific = true;
}
}
else
throw new DocumentException(MessageLocalization.getComposedMessage("1.2.is.not.a.ttf.font.file", fileName, style));
vertical = enc.endsWith("V");
}
@Override
void process(byte ttfAfm[], boolean preload) throws DocumentException, IOException {
super.process(ttfAfm, preload);
//readGsubTable();
}
/**
* Gets the width of a char in normalized 1000 units.
* @param char1 the unicode char to get the width of
* @return the width in normalized 1000 units
*/
@Override
public int getWidth(int char1) {
if (vertical)
return 1000;
if (fontSpecific) {
if ((char1 & 0xff00) == 0 || (char1 & 0xff00) == 0xf000)
return getRawWidth(char1 & 0xff, null);
else
return 0;
}
else {
return getRawWidth(char1, encoding);
}
}
/**
* Gets the width of a String in normalized 1000 units.
* @param text the String to get the width of
* @return the width in normalized 1000 units
*/
@Override
public int getWidth(String text) {
if (vertical)
return text.length() * 1000;
int total = 0;
if (fontSpecific) {
char cc[] = text.toCharArray();
int len = cc.length;
for (int k = 0; k < len; ++k) {
char c = cc[k];
if ((c & 0xff00) == 0 || (c & 0xff00) == 0xf000)
total += getRawWidth(c & 0xff, null);
}
}
else {
int len = text.length();
for (int k = 0; k < len; ++k) {
if (Utilities.isSurrogatePair(text, k)) {
total += getRawWidth(Utilities.convertToUtf32(text, k), encoding);
++k;
}
else
total += getRawWidth(text.charAt(k), encoding);
}
}
return total;
}
/** Creates a ToUnicode CMap to allow copy and paste from Acrobat.
* @param metrics metrics[0] contains the glyph index and metrics[2]
* contains the Unicode code
* @return the stream representing this CMap or null
*/
public PdfStream getToUnicode(Object metrics[]) {
if (metrics.length == 0)
return null;
StringBuffer buf = new StringBuffer(
"/CIDInit /ProcSet findresource begin\n" +
"12 dict begin\n" +
"begincmap\n" +
"/CIDSystemInfo\n" +
"<< /Registry (TTX+0)\n" +
"/Ordering (T42UV)\n" +
"/Supplement 0\n" +
">> def\n" +
"/CMapName /TTX+0 def\n" +
"/CMapType 2 def\n" +
"1 begincodespacerange\n" +
"<0000>\n" +
"endcodespacerange\n");
int size = 0;
for (int k = 0; k < metrics.length; ++k) {
if (size == 0) {
if (k != 0) {
buf.append("endbfrange\n");
}
size = Math.min(100, metrics.length - k);
buf.append(size).append(" beginbfrange\n");
}
--size;
int metric[] = (int[])metrics[k];
String fromTo = toHex(metric[0]);
buf.append(fromTo).append(fromTo).append(toHex(metric[2])).append('\n');
}
buf.append(
"endbfrange\n" +
"endcmap\n" +
"CMapName currentdict /CMap defineresource pop\n" +
"end end\n");
String s = buf.toString();
PdfStream stream = new PdfStream(PdfEncodings.convertToBytes(s, null));
stream.flateCompress(compressionLevel);
return stream;
}
private static String toHex4(int n) {
String s = "0000" + Integer.toHexString(n);
return s.substring(s.length() - 4);
}
/** Gets an hex string in the format "<HHHH>".
* @param n the number
* @return the hex string
*/
static String toHex(int n) {
if (n < 0x10000)
return "<" + toHex4(n) + ">";
n -= 0x10000;
int high = n / 0x400 + 0xd800;
int low = n % 0x400 + 0xdc00;
return "[<" + toHex4(high) + toHex4(low) + ">]";
}
/** Generates the CIDFontTyte2 dictionary.
* @param fontDescriptor the indirect reference to the font descriptor
* @param subsetPrefix the subset prefix
* @param metrics the horizontal width metrics
* @return a stream
*/
public PdfDictionary getCIDFontType2(PdfIndirectReference fontDescriptor, String subsetPrefix, Object metrics[]) {
PdfDictionary dic = new PdfDictionary(PdfName.FONT);
// sivan; cff
if (cff) {
dic.put(PdfName.SUBTYPE, PdfName.CIDFONTTYPE0);
dic.put(PdfName.BASEFONT, new PdfName(subsetPrefix+fontName+"-"+encoding));
}
else {
dic.put(PdfName.SUBTYPE, PdfName.CIDFONTTYPE2);
dic.put(PdfName.BASEFONT, new PdfName(subsetPrefix + fontName));
}
dic.put(PdfName.FONTDESCRIPTOR, fontDescriptor);
if (!cff)
dic.put(PdfName.CIDTOGIDMAP,PdfName.IDENTITY);
PdfDictionary cdic = new PdfDictionary();
cdic.put(PdfName.REGISTRY, new PdfString("Adobe"));
cdic.put(PdfName.ORDERING, new PdfString("Identity"));
cdic.put(PdfName.SUPPLEMENT, new PdfNumber(0));
dic.put(PdfName.CIDSYSTEMINFO, cdic);
if (!vertical) {
dic.put(PdfName.DW, new PdfNumber(1000));
StringBuffer buf = new StringBuffer("[");
int lastNumber = -10;
boolean firstTime = true;
for (int k = 0; k < metrics.length; ++k) {
int metric[] = (int[])metrics[k];
if (metric[1] == 1000)
continue;
int m = metric[0];
if (m == lastNumber + 1) {
buf.append(' ').append(metric[1]);
}
else {
if (!firstTime) {
buf.append(']');
}
firstTime = false;
buf.append(m).append('[').append(metric[1]);
}
lastNumber = m;
}
if (buf.length() > 1) {
buf.append("]]");
dic.put(PdfName.W, new PdfLiteral(buf.toString()));
}
}
return dic;
}
/** Generates the font dictionary.
* @param descendant the descendant dictionary
* @param subsetPrefix the subset prefix
* @param toUnicode the ToUnicode stream
* @return the stream
*/
public PdfDictionary getFontBaseType(PdfIndirectReference descendant, String subsetPrefix, PdfIndirectReference toUnicode) {
PdfDictionary dic = new PdfDictionary(PdfName.FONT);
dic.put(PdfName.SUBTYPE, PdfName.TYPE0);
// The PDF Reference manual advises to add -encoding to CID font names
if (cff)
dic.put(PdfName.BASEFONT, new PdfName(subsetPrefix+fontName+"-"+encoding));
//dic.put(PdfName.BASEFONT, new PdfName(subsetPrefix+fontName));
else
dic.put(PdfName.BASEFONT, new PdfName(subsetPrefix + fontName));
//dic.put(PdfName.BASEFONT, new PdfName(fontName));
dic.put(PdfName.ENCODING, new PdfName(encoding));
dic.put(PdfName.DESCENDANTFONTS, new PdfArray(descendant));
if (toUnicode != null)
dic.put(PdfName.TOUNICODE, toUnicode);
return dic;
}
public int GetCharFromGlyphId(int gid) {
if (glyphIdToChar == null) {
int[] g2 = new int[maxGlyphId];
HashMap map = null;
if (cmapExt != null) {
map = cmapExt;
}
else if (cmap31 != null) {
map = cmap31;
}
if (map != null) {
for (Map.Entry entry : map.entrySet()) {
g2[entry.getValue()[0]] = entry.getKey().intValue();
}
}
glyphIdToChar = g2;
}
return glyphIdToChar[gid];
}
/** The method used to sort the metrics array.
* @param o1 the first element
* @param o2 the second element
* @return the comparison
*/
public int compare(int[] o1, int[] o2) {
int m1 = o1[0];
int m2 = o2[0];
if (m1 < m2)
return -1;
if (m1 == m2)
return 0;
return 1;
}
private static final byte[] rotbits = {(byte)0x80,(byte)0x40,(byte)0x20,(byte)0x10,(byte)0x08,(byte)0x04,(byte)0x02,(byte)0x01};
/** Outputs to the writer the font dictionaries and streams.
* @param writer the writer for this document
* @param ref the font indirect reference
* @param params several parameters that depend on the font type
* @throws IOException on error
* @throws DocumentException error in generating the object
*/
@Override
void writeFont(PdfWriter writer, PdfIndirectReference ref, Object params[]) throws DocumentException, IOException {
writer.getTtfUnicodeWriter().writeFont(this, ref, params, rotbits);
}
/**
* Returns a PdfStream object with the full font program.
* @return a PdfStream with the font program
* @since 2.1.3
*/
@Override
public PdfStream getFullFontStream() throws IOException, DocumentException {
if (cff) {
return new StreamFont(readCffFont(), "CIDFontType0C", compressionLevel);
}
return super.getFullFontStream();
}
/** A forbidden operation. Will throw a null pointer exception.
* @param text the text
* @return always null
*/
@Override
public byte[] convertToBytes(String text) {
return null;
}
@Override
byte[] convertToBytes(int char1) {
return null;
}
/** Gets the glyph index and metrics for a character.
* @param c the character
* @return an int array with {glyph index, width}
*/
@Override
public int[] getMetricsTT(int c) {
if (cmapExt != null)
return cmapExt.get(Integer.valueOf(c));
HashMap map = null;
if (fontSpecific)
map = cmap10;
else
map = cmap31;
if (map == null)
return null;
if (fontSpecific) {
if ((c & 0xffffff00) == 0 || (c & 0xffffff00) == 0xf000)
return map.get(Integer.valueOf(c & 0xff));
else
return null;
}
else
return map.get(Integer.valueOf(c));
}
/**
* Checks if a character exists in this font.
* @param c the character to check
* @return true if the character has a glyph,
* false otherwise
*/
@Override
public boolean charExists(int c) {
return getMetricsTT(c) != null;
}
/**
* Sets the character advance.
* @param c the character
* @param advance the character advance normalized to 1000 units
* @return true if the advance was set,
* false otherwise
*/
@Override
public boolean setCharAdvance(int c, int advance) {
int[] m = getMetricsTT(c);
if (m == null)
return false;
m[1] = advance;
return true;
}
@Override
public int[] getCharBBox(int c) {
if (bboxes == null)
return null;
int[] m = getMetricsTT(c);
if (m == null)
return null;
return bboxes[m[0]];
}
protected Map getGlyphSubstitutionMap() {
return glyphSubstitutionMap;
}
Language getSupportedLanguage() {
return supportedLanguage;
}
private void readGsubTable() throws IOException {
if (tables.get("GSUB") != null) {
Map glyphToCharacterMap = new HashMap(cmap31.size());
for (Integer charCode : cmap31.keySet()) {
char c = (char) charCode.intValue();
int glyphCode = cmap31.get(charCode)[0];
glyphToCharacterMap.put(glyphCode, c);
}
GlyphSubstitutionTableReader gsubReader = new GlyphSubstitutionTableReader(
rf, tables.get("GSUB")[0], glyphToCharacterMap, glyphWidthsByIndex);
try {
gsubReader.read();
supportedLanguage = gsubReader.getSupportedLanguage();
if (SUPPORTED_LANGUAGES_FOR_OTF.contains(supportedLanguage)) {
glyphSubstitutionMap = gsubReader.getGlyphSubstitutionMap();
/*if (false) {
StringBuilder sb = new StringBuilder(50);
for (int glyphCode : glyphToCharacterMap.keySet()) {
sb.append(glyphCode).append("=>").append(glyphToCharacterMap.get(glyphCode)).append("\n");
}
System.out.println("GlyphToCharacterMap:\n" + sb.toString());
}
if (false) {
StringBuilder sb = new StringBuilder(50);
int count = 1;
for (String chars : glyphSubstitutionMap.keySet()) {
int glyphId = glyphSubstitutionMap.get(chars).code;
sb.append(count++).append(".>");
sb.append(chars).append(" => ").append(glyphId).append("\n");
}
System.out.println("GlyphSubstitutionMap:\n" + sb.toString());
}*/
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
}