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jogamp.graph.font.typecast.ot.table.CffTable Maven / Gradle / Ivy
/*
* $Id: CffTable.java,v 1.4 2007-07-26 11:15:06 davidsch Exp $
*
* Typecast - The Font Development Environment
*
* Copyright (c) 2004-2007 David Schweinsberg
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* 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,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jogamp.graph.font.typecast.ot.table;
import java.io.ByteArrayInputStream;
import java.io.DataInput;
import java.io.DataInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Dictionary;
import java.util.Enumeration;
import java.util.Hashtable;
/**
* Compact Font Format Table
* @version $Id: CffTable.java,v 1.4 2007-07-26 11:15:06 davidsch Exp $
* @author David Schweinsberg
*/
public class CffTable implements Table {
public static class Dict {
private final Dictionary _entries = new Hashtable();
private final int[] _data;
private int _index;
protected Dict(final int[] data, final int offset, final int length) {
_data = data;
_index = offset;
while (_index < offset + length) {
addKeyAndValueEntry();
}
}
public Object getValue(final int key) {
return _entries.get(key);
}
private boolean addKeyAndValueEntry() {
final ArrayList operands = new ArrayList();
Object operand = null;
while (isOperandAtIndex()) {
operand = nextOperand();
operands.add(operand);
}
int operator = _data[_index++];
if (operator == 12) {
operator <<= 8;
operator |= _data[_index++];
}
if (operands.size() == 1) {
_entries.put(operator, operand);
} else {
_entries.put(operator, operands);
}
return true;
}
private boolean isOperandAtIndex() {
final int b0 = _data[_index];
if ((32 <= b0 && b0 <= 254)
|| b0 == 28
|| b0 == 29
|| b0 == 30) {
return true;
}
return false;
}
private boolean isOperatorAtIndex() {
final int b0 = _data[_index];
if (0 <= b0 && b0 <= 21) {
return true;
}
return false;
}
private Object nextOperand() {
final int b0 = _data[_index];
if (32 <= b0 && b0 <= 246) {
// 1 byte integer
++_index;
return Integer.valueOf(b0 - 139);
} else if (247 <= b0 && b0 <= 250) {
// 2 byte integer
final int b1 = _data[_index + 1];
_index += 2;
return Integer.valueOf((b0 - 247) * 256 + b1 + 108);
} else if (251 <= b0 && b0 <= 254) {
// 2 byte integer
final int b1 = _data[_index + 1];
_index += 2;
return Integer.valueOf(-(b0 - 251) * 256 - b1 - 108);
} else if (b0 == 28) {
// 3 byte integer
final int b1 = _data[_index + 1];
final int b2 = _data[_index + 2];
_index += 3;
return Integer.valueOf(b1 << 8 | b2);
} else if (b0 == 29) {
// 5 byte integer
final int b1 = _data[_index + 1];
final int b2 = _data[_index + 2];
final int b3 = _data[_index + 3];
final int b4 = _data[_index + 4];
_index += 5;
return Integer.valueOf(b1 << 24 | b2 << 16 | b3 << 8 | b4);
} else if (b0 == 30) {
// Real number
final StringBuilder fString = new StringBuilder();
int nibble1 = 0;
int nibble2 = 0;
++_index;
while ((nibble1 != 0xf) && (nibble2 != 0xf)) {
nibble1 = _data[_index] >> 4;
nibble2 = _data[_index] & 0xf;
++_index;
fString.append(decodeRealNibble(nibble1));
fString.append(decodeRealNibble(nibble2));
}
return Float.valueOf(fString.toString());
} else {
return null;
}
}
private String decodeRealNibble(final int nibble) {
if (nibble < 0xa) {
return Integer.toString(nibble);
} else if (nibble == 0xa) {
return ".";
} else if (nibble == 0xb) {
return "E";
} else if (nibble == 0xc) {
return "E-";
} else if (nibble == 0xe) {
return "-";
}
return "";
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder();
final Enumeration keys = _entries.keys();
while (keys.hasMoreElements()) {
final Integer key = keys.nextElement();
if ((key.intValue() & 0xc00) == 0xc00) {
sb.append("12 ").append(key.intValue() & 0xff).append(": ");
} else {
sb.append(key.toString()).append(": ");
}
sb.append(_entries.get(key).toString()).append("\n");
}
return sb.toString();
}
}
public class Index {
private final int _count;
private final int _offSize;
private final int[] _offset;
private final int[] _data;
protected Index(final DataInput di) throws IOException {
_count = di.readUnsignedShort();
_offset = new int[_count + 1];
_offSize = di.readUnsignedByte();
for (int i = 0; i < _count + 1; ++i) {
int thisOffset = 0;
for (int j = 0; j < _offSize; ++j) {
thisOffset |= di.readUnsignedByte() << ((_offSize - j - 1) * 8);
}
_offset[i] = thisOffset;
}
_data = new int[getDataLength()];
for (int i = 0; i < getDataLength(); ++i) {
_data[i] = di.readUnsignedByte();
}
}
public int getCount() {
return _count;
}
public int getOffset(final int index) {
return _offset[index];
}
public int getDataLength() {
return _offset[_offset.length - 1] - 1;
}
public int[] getData() {
return _data;
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder();
sb.append("DICT\n");
sb.append("count: ").append(_count).append("\n");
sb.append("offSize: ").append(_offSize).append("\n");
for (int i = 0; i < _count + 1; ++i) {
sb.append("offset[").append(i).append("]: ").append(_offset[i]).append("\n");
}
sb.append("data:");
for (int i = 0; i < _data.length; ++i) {
if (i % 8 == 0) {
sb.append("\n");
} else {
sb.append(" ");
}
sb.append(_data[i]);
}
sb.append("\n");
return sb.toString();
}
}
public class TopDictIndex extends Index {
protected TopDictIndex(final DataInput di) throws IOException {
super(di);
}
public Dict getTopDict(final int index) {
final int offset = getOffset(index) - 1;
final int len = getOffset(index + 1) - offset - 1;
return new Dict(getData(), offset, len);
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder();
for (int i = 0; i < getCount(); ++i) {
sb.append(getTopDict(i).toString()).append("\n");
}
return sb.toString();
}
}
public class NameIndex extends Index {
protected NameIndex(final DataInput di) throws IOException {
super(di);
}
public String getName(final int index) {
String name = null;
final int offset = getOffset(index) - 1;
final int len = getOffset(index + 1) - offset - 1;
// Ensure the name hasn't been deleted
if (getData()[offset] != 0) {
final StringBuilder sb = new StringBuilder();
for (int i = offset; i < offset + len; ++i) {
sb.append((char) getData()[i]);
}
name = sb.toString();
} else {
name = "DELETED NAME";
}
return name;
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder();
for (int i = 0; i < getCount(); ++i) {
sb.append(getName(i)).append("\n");
}
return sb.toString();
}
}
public class StringIndex extends Index {
protected StringIndex(final DataInput di) throws IOException {
super(di);
}
public String getString(int index) {
if (index < CffStandardStrings.standardStrings.length) {
return CffStandardStrings.standardStrings[index];
} else {
index -= CffStandardStrings.standardStrings.length;
if (index >= getCount()) {
return null;
}
final int offset = getOffset(index) - 1;
final int len = getOffset(index + 1) - offset - 1;
final StringBuilder sb = new StringBuilder();
for (int i = offset; i < offset + len; ++i) {
sb.append((char) getData()[i]);
}
return sb.toString();
}
}
@Override
public String toString() {
final int nonStandardBase = CffStandardStrings.standardStrings.length;
final StringBuilder sb = new StringBuilder();
for (int i = 0; i < getCount(); ++i) {
sb.append(nonStandardBase + i).append(": ");
sb.append(getString(nonStandardBase + i)).append("\n");
}
return sb.toString();
}
}
private class CharsetRange {
private int _first;
private int _left;
public int getFirst() {
return _first;
}
protected void setFirst(final int first) {
_first = first;
}
public int getLeft() {
return _left;
}
protected void setLeft(final int left) {
_left = left;
}
}
private class CharsetRange1 extends CharsetRange {
protected CharsetRange1(final DataInput di) throws IOException {
setFirst(di.readUnsignedShort());
setLeft(di.readUnsignedByte());
}
}
private class CharsetRange2 extends CharsetRange {
protected CharsetRange2(final DataInput di) throws IOException {
setFirst(di.readUnsignedShort());
setLeft(di.readUnsignedShort());
}
}
private abstract class Charset {
public abstract int getFormat();
public abstract int getSID(int gid);
}
private class CharsetFormat0 extends Charset {
private final int[] _glyph;
protected CharsetFormat0(final DataInput di, final int glyphCount) throws IOException {
_glyph = new int[glyphCount - 1]; // minus 1 because .notdef is omitted
for (int i = 0; i < glyphCount - 1; ++i) {
_glyph[i] = di.readUnsignedShort();
}
}
@Override
public int getFormat() {
return 0;
}
@Override
public int getSID(final int gid) {
if (gid == 0) {
return 0;
}
return _glyph[gid - 1];
}
}
private class CharsetFormat1 extends Charset {
private final ArrayList _charsetRanges = new ArrayList();
protected CharsetFormat1(final DataInput di, final int glyphCount) throws IOException {
int glyphsCovered = glyphCount - 1; // minus 1 because .notdef is omitted
while (glyphsCovered > 0) {
final CharsetRange range = new CharsetRange1(di);
_charsetRanges.add(range);
glyphsCovered -= range.getLeft() + 1;
}
}
@Override
public int getFormat() {
return 1;
}
@Override
public int getSID(final int gid) {
if (gid == 0) {
return 0;
}
// Count through the ranges to find the one of interest
int count = 0;
for (final CharsetRange range : _charsetRanges) {
count += range.getLeft();
if (gid < count) {
final int sid = gid - count + range.getFirst();
return sid;
}
}
return 0;
}
}
private class CharsetFormat2 extends Charset {
private final ArrayList _charsetRanges = new ArrayList();
protected CharsetFormat2(final DataInput di, final int glyphCount) throws IOException {
int glyphsCovered = glyphCount - 1; // minus 1 because .notdef is omitted
while (glyphsCovered > 0) {
final CharsetRange range = new CharsetRange2(di);
_charsetRanges.add(range);
glyphsCovered -= range.getLeft() + 1;
}
}
@Override
public int getFormat() {
return 2;
}
@Override
public int getSID(final int gid) {
if (gid == 0) {
return 0;
}
// Count through the ranges to find the one of interest
int count = 0;
for (final CharsetRange range : _charsetRanges) {
if (gid < range.getLeft() + count) {
final int sid = gid - count + range.getFirst() - 1;
return sid;
}
count += range.getLeft();
}
return 0;
}
}
private final DirectoryEntry _de;
private final int _major;
private final int _minor;
private final int _hdrSize;
private final int _offSize;
private final NameIndex _nameIndex;
private final TopDictIndex _topDictIndex;
private final StringIndex _stringIndex;
private final Index _globalSubrIndex;
private final Index _charStringsIndexArray[];
private final Charset[] _charsets;
private final Charstring[][] _charstringsArray;
private final byte[] _buf;
/** Creates a new instance of CffTable */
protected CffTable(final DirectoryEntry de, final DataInput di) throws IOException {
_de = (DirectoryEntry) de.clone();
// Load entire table into a buffer, and create another input stream
_buf = new byte[de.getLength()];
di.readFully(_buf);
DataInput di2 = getDataInputForOffset(0);
// Header
_major = di2.readUnsignedByte();
_minor = di2.readUnsignedByte();
_hdrSize = di2.readUnsignedByte();
_offSize = di2.readUnsignedByte();
// Name INDEX
di2 = getDataInputForOffset(_hdrSize);
_nameIndex = new NameIndex(di2);
// Top DICT INDEX
_topDictIndex = new TopDictIndex(di2);
// String INDEX
_stringIndex = new StringIndex(di2);
// Global Subr INDEX
_globalSubrIndex = new Index(di2);
// Encodings go here -- but since this is an OpenType font will this
// not always be a CIDFont? In which case there are no encodings
// within the CFF data.
// Load each of the fonts
_charStringsIndexArray = new Index[_topDictIndex.getCount()];
_charsets = new Charset[_topDictIndex.getCount()];
_charstringsArray = new Charstring[_topDictIndex.getCount()][];
for (int i = 0; i < _topDictIndex.getCount(); ++i) {
// Charstrings INDEX
// We load this before Charsets because we may need to know the number
// of glyphs
final Integer charStringsOffset = (Integer) _topDictIndex.getTopDict(i).getValue(17);
di2 = getDataInputForOffset(charStringsOffset);
_charStringsIndexArray[i] = new Index(di2);
final int glyphCount = _charStringsIndexArray[i].getCount();
// Charsets
final Integer charsetOffset = (Integer) _topDictIndex.getTopDict(i).getValue(15);
di2 = getDataInputForOffset(charsetOffset);
final int format = di2.readUnsignedByte();
switch (format) {
case 0:
_charsets[i] = new CharsetFormat0(di2, glyphCount);
break;
case 1:
_charsets[i] = new CharsetFormat1(di2, glyphCount);
break;
case 2:
_charsets[i] = new CharsetFormat2(di2, glyphCount);
break;
}
// Create the charstrings
_charstringsArray[i] = new Charstring[glyphCount];
for (int j = 0; j < glyphCount; ++j) {
final int offset = _charStringsIndexArray[i].getOffset(j) - 1;
final int len = _charStringsIndexArray[i].getOffset(j + 1) - offset - 1;
_charstringsArray[i][j] = new CharstringType2(
i,
_stringIndex.getString(_charsets[i].getSID(j)),
_charStringsIndexArray[i].getData(),
offset,
len,
null,
null);
}
}
}
private DataInput getDataInputForOffset(final int offset) {
return new DataInputStream(new ByteArrayInputStream(
_buf, offset,
_de.getLength() - offset));
}
public NameIndex getNameIndex() {
return _nameIndex;
}
public Charset getCharset(final int fontIndex) {
return _charsets[fontIndex];
}
public Charstring getCharstring(final int fontIndex, final int gid) {
return _charstringsArray[fontIndex][gid];
}
public int getCharstringCount(final int fontIndex) {
return _charstringsArray[fontIndex].length;
}
@Override
public int getType() {
return CFF;
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder();
sb.append("'CFF' Table - Compact Font Format\n---------------------------------\n");
sb.append("\nName INDEX\n");
sb.append(_nameIndex.toString());
sb.append("\nTop DICT INDEX\n");
sb.append(_topDictIndex.toString());
sb.append("\nString INDEX\n");
sb.append(_stringIndex.toString());
sb.append("\nGlobal Subr INDEX\n");
sb.append(_globalSubrIndex.toString());
for (int i = 0; i < _charStringsIndexArray.length; ++i) {
sb.append("\nCharStrings INDEX ").append(i).append("\n");
sb.append(_charStringsIndexArray[i].toString());
}
return sb.toString();
}
/**
* Get a directory entry for this table. This uniquely identifies the
* table in collections where there may be more than one instance of a
* particular table.
* @return A directory entry
*/
@Override
public DirectoryEntry getDirectoryEntry() {
return _de;
}
}
