/*
* $Id: CmapWriter.java,v 1.8 2004/01/27 00:35:08 eed3si9n Exp $
*
* $Copyright: copyright (c) 2003, e.e d3si9n $
* $License:
* This source code is part of DoubleType.
* DoubleType is a graphical typeface designer.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* In addition, as a special exception, e.e d3si9n gives permission to
* link the code of this program with any Java Platform that is available
* to public with free of charge, including but not limited to
* Sun Microsystem's JAVA(TM) 2 RUNTIME ENVIRONMENT (J2RE),
* and distribute linked combinations including the two.
* You must obey the GNU General Public License in all respects for all
* of the code used other than Java Platform. If you modify this file,
* you may extend this exception to your version of the file, but you are not
* obligated to do so. If you do not wish to do so, delete this exception
* statement from your version.
* $
*/
package org.doubletype.ossa.truetype;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* @author e.e
*/
public class CmapWriter extends FontFormatWriter {
final long k_basicLatinStart = 0x20;
final long k_basicLatinEnd = 0x7e;
final long k_tableEnd = 0xffff;
final int k_unmappedChar = 0x0;
private OS2Writer m_os2;
private List<Long> m_unicodes = new ArrayList<>();
private List<Long> m_startCodes = new ArrayList<>();
private List<Long> m_endCodes = new ArrayList<>();
private Map<Long, Long> m_unicode2glyph = new HashMap<>();
private List<TTUnicodeRange> m_unicodeRanges = new ArrayList<>();
private List<Long> m_idDeltas = new ArrayList<>();
private List<Long> m_idRangeOffsets = new ArrayList<>();
private boolean m_isIncludeVersion0;
private byte[] m_version0;
private byte[] m_version4;
private byte[] m_version12;
public CmapWriter(OS2Writer a_os2) {
super();
m_os2 = a_os2;
m_isIncludeVersion0 = false;
}
private void prepare() {
Collections.sort(m_unicodeRanges);
TTUnicodeRange range = (TTUnicodeRange) m_unicodeRanges.get(0);
m_os2.m_usFirstCharIndex = (int) range.getStartCode();
m_os2.m_usLastCharIndex = (int) range.getEndCode();
int i;
for (i = 0; i < m_unicodeRanges.size(); i++) {
range = m_unicodeRanges.get(i);
m_startCodes.add(range.getStartCode());
m_endCodes.add(range.getEndCode());
m_idDeltas.add(0L);
m_idRangeOffsets.add(
2L * (m_unicodeRanges.size() - i) + 2L
+ 2L * (m_unicodes.size()));
m_os2.m_usLastCharIndex = (int) range.getEndCode();
m_os2.setUnicodeRangeFlag(range.getOsTwoFlag());
for (long unicode = range.getStartCode();
unicode <= range.getEndCode(); unicode++) {
m_unicodes.add(unicode);
} // for unicode
}
m_startCodes.add(k_tableEnd);
m_endCodes.add(k_tableEnd);
m_idDeltas.add(1L);
m_idRangeOffsets.add(0L);
}
public void write() throws IOException {
prepare();
if (m_isIncludeVersion0) {
storeVersion0();
}
storeVersion4();
reset();
writeUInt16(0); // table version number
writeUInt16(getNumOfEncoding()); // num of encodings
if (m_isIncludeVersion0) {
writeUInt16(TTName.k_macintosh);
writeUInt16(TTName.k_macRomanEncode);
writeUInt32(size() + 4 + 8);
}
writeUInt16(TTName.k_microsoft);
writeUInt16(TTName.k_winUnicodeEncode);
int version4Offset = size() + 4;
if (m_isIncludeVersion0) {
version4Offset += m_version0.length;
}
writeUInt32(version4Offset);
if (m_isIncludeVersion0) {
m_buffer.write(m_version0);
}
m_buffer.write(m_version4);
pad();
}
private int getNumOfEncoding() {
if (m_isIncludeVersion0) {
return 2;
}
return 1;
}
public void addUnicodeRange(TTUnicodeRange a_range) {
m_unicodeRanges.add(a_range);
}
public void addMapping(long a_unicode, long a_glyfIndex) {
m_unicode2glyph.put(a_unicode, a_glyfIndex);
}
/**
* Find 'glyf' index for the given unicode.
* This method returns 0, if a_key was not found, which will be treated
* as unmapped character.
*
* @param a_key Long object with unicode value.
* @return 'glyf' index if a_key was found; 0 otherwise.
*/
public long getGlyfIndex(Long a_key) {
long retval = 0;
if (m_unicode2glyph.containsKey(a_key)) {
retval = m_unicode2glyph.get(a_key);
}
return retval;
}
private void storeVersion0() throws IOException {
reset();
writeVersion0();
m_version0 = toByteArray();
reset();
}
private void storeVersion4() throws IOException {
reset();
writeVersion4();
m_version4 = toByteArray();
reset();
}
private void storeVersion12() throws IOException {
reset();
writeVersion12();
m_version12 = toByteArray();
reset();
}
protected String getTag() {
return "cmap";
}
private void writeVersion0() throws IOException {
writeUInt16(0);
writeUInt16(262);
writeUInt16(0);
int i;
for (i = 0; i < 256; i++) {
if ((i == 0x000) || (i == 0x0008) || (i == 0x001D)) {
writeUInt8((int) getGlyfIndex(TTUnicodeRange.k_null)); // .null
} else if ((i == 0x0009) || (i == 0x000d)) {
writeUInt8((int) getGlyfIndex(TTUnicodeRange.k_cr)); // CR
} else {
writeUInt8((int) getGlyfIndex((long) i));
}
}
}
private void writeVersion4() throws IOException {
int segCount = m_startCodes.size();
int i;
// endCount
for (i = 0; i < segCount; i++) {
Long n = (Long) m_endCodes.get(i);
writeUInt16(n.intValue());
}
// reserverdPad
writeUInt16(0);
// startCount
for (i = 0; i < segCount; i++) {
Long n = m_startCodes.get(i);
writeUInt16(n.intValue());
}
// idDelta
for (i = 0; i < segCount; i++) {
Long n = m_idDeltas.get(i);
writeInt16(n.intValue());
}
// idRangeOffset
for (i = 0; i < segCount; i++) {
Long n = m_idRangeOffsets.get(i);
writeInt16(n.intValue());
}
// glyphIdArray 2 bytes each
for (i = 0; i < m_unicodes.size(); i++) {
Long unicode = m_unicodes.get(i);
writeUInt16((int) getGlyfIndex(unicode));
}
byte[] bytes = m_bytes.toByteArray();
reset();
writeUInt16(4);
writeUInt16(bytes.length + 14);
writeUInt16(0);
writeUInt16(segCount * 2);
int searchRange = getSearchRange(segCount);
writeUInt16(searchRange);
writeUInt16(getEntrySelector(searchRange));
writeUInt16(getRangeShift(segCount, searchRange));
m_buffer.write(bytes);
}
public void writeVersion12() throws IOException {
ArrayList<Long> startCharCode = new ArrayList<>();
ArrayList<Long> endCharCode = new ArrayList<>();
ArrayList<Long> startGlyphCode = new ArrayList<>();
// TODO: map to real one
startCharCode.add(k_basicLatinStart);
endCharCode.add(k_basicLatinEnd);
startGlyphCode.add(1L);
long length = 16 + 12 * startCharCode.size();
writeFixed32(12.0);
writeUInt32(length);
writeUInt32(0);
writeUInt32(startCharCode.size());
int i;
for (i = 0; i < startCharCode.size(); i++) {
writeUInt32(startCharCode.get(i));
writeUInt32(endCharCode.get(i));
writeUInt32(startGlyphCode.get(i));
}
}
/**
* Used for searchRange
*
* @param a_value
* @return
*/
private int getSearchRange(int a_value) {
int retval
= (int) Math.pow(2, Math.floor(Math.log(a_value) / Math.log(2)));
return 2 * retval;
}
private int getEntrySelector(int a_searchRange) {
int retval
= (int) (Math.log(a_searchRange / 2) / Math.log(2));
return retval;
}
private int getRangeShift(int a_value, int a_searchRange) {
int retval
= 2 * a_value - a_searchRange;
return retval;
}
}