private void OS_2(FontTable table)
{
index = table.offset + 64;
firstChar = ReadUInt16();
lastChar = ReadUInt16();
index += 20;
capHeight = (short)ReadUInt16();
}
private void Hhea(FontTable table)
{
index = table.offset + 4;
ascent = (short)ReadUInt16();
descent = (short)ReadUInt16();
index += 26;
advanceWidth = new int[ReadUInt16()];
}
private void Post(FontTable table)
{
index = table.offset;
postVersion = ReadUInt32();
italicAngle = ReadUInt32();
underlinePosition = (short)ReadUInt16();
underlineThickness = (short)ReadUInt16();
}
private void Hmtx(FontTable table)
{
index = table.offset;
for (int j = 0; j < advanceWidth.Length; j++)
{
advanceWidth[j] = ReadUInt16();
index += 2;
}
}
private void Head(FontTable table)
{
index = table.offset + 16;
int flags = ReadUInt16();
unitsPerEm = ReadUInt16();
index += 16;
bBoxLLx = (short)ReadUInt16();
bBoxLLy = (short)ReadUInt16();
bBoxURx = (short)ReadUInt16();
bBoxURy = (short)ReadUInt16();
}
private void Name(FontTable table)
{
index = table.offset;
int tableOffset = index;
int format = ReadUInt16();
int count = ReadUInt16();
int stringOffset = ReadUInt16();
for (int r = 0; r < count; r++)
{
int platformID = ReadUInt16();
int encodingID = ReadUInt16();
int languageID = ReadUInt16();
int nameID = ReadUInt16();
int length = ReadUInt16();
int offset = ReadUInt16();
int fontNameOffset = tableOffset + stringOffset + offset;
if (platformID == 1) // Macintosh
{
if (encodingID == 0 && languageID == 0 && nameID == 6)
{
index = fontNameOffset;
char[] buf = new char[length];
for (int i = 0; i < length; i++)
{
buf[i] = (char)ReadByte();
}
fontName = new String(buf);
break;
}
}
else if (platformID == 3) // Windows
{
if (encodingID == 1 && languageID == 0x409 && nameID == 6)
{
index = fontNameOffset;
int len = length / 2;
char[] buf = new char[len];
for (int i = 0; i < len; i++)
{
byte b1 = ReadByte();
byte b2 = ReadByte();
buf[i] = (char)b2;
}
fontName = new String(buf);
break;
}
}
}
}
private void Hmtx(FontTable table)
{
index = table.offset;
for (int j = 0; j < advanceWidth.Length; j++) {
advanceWidth[j] = ReadUInt16();
index += 2;
}
}
private void Hhea(FontTable table)
{
index = table.offset + 4;
ascent = (short) ReadUInt16();
descent = (short) ReadUInt16();
index += 26;
advanceWidth = new int[ReadUInt16()];
}
private void Head(FontTable table)
{
index = table.offset + 16;
int flags = ReadUInt16();
unitsPerEm = ReadUInt16();
index += 16;
bBoxLLx = (short) ReadUInt16();
bBoxLLy = (short) ReadUInt16();
bBoxURx = (short) ReadUInt16();
bBoxURy = (short) ReadUInt16();
}
private void GSUB(FontTable table)
{
index = table.offset;
int tableOffset = index;
/*
Type Name Description
Fixed Version Version of the GSUB table-initially set to 0x00010000
Offset ScriptList Offset to ScriptList table-from beginning of GSUB table
Offset FeatureList Offset to FeatureList table-from beginning of GSUB table
Offset LookupList Offset to LookupList table-from beginning of GSUB table
*/
long version = ReadUInt32();
int scriptList = ReadUInt16();
int featureList = ReadUInt16();
int lookupList = ReadUInt16();
/*
Console.WriteLine();
Console.WriteLine("GSUB");
Console.WriteLine("version == " + version.ToString("x"));
*/
index = tableOffset + scriptList;
int scriptCount = ReadUInt16();
// Console.WriteLine("scriptCount == " + scriptCount);
for (int i = 0; i < scriptCount; i++) {
}
index = tableOffset + featureList;
int featureCount = ReadUInt16();
// Console.WriteLine("featureCount == " + featureCount);
for (int i = 0; i < featureCount; i++) {
}
index = tableOffset + lookupList;
int lookupCount = ReadUInt16();
// Console.WriteLine("lookupCount == " + lookupCount);
int[] lookupTable = new int[lookupCount];
for (int i = 0; i < lookupCount; i++) {
lookupTable[i] = ReadUInt16();
}
for (int i = 0; i < lookupTable.Length; i++) {
index = tableOffset + lookupList + lookupTable[i];
int lookupType = ReadUInt16();
int lookupFlag = ReadUInt16();
int subTableCount = ReadUInt16();
/*
Console.WriteLine("lookupType == " + lookupType);
Console.WriteLine("lookupFlag == " + lookupFlag);
Console.WriteLine("subTableCount == " + subTableCount);
*/
}
}
private void Cmap(FontTable table)
{
index = table.offset;
int tableOffset = index;
index += 2;
int numRecords = ReadUInt16();
// Process the encoding records
bool format4subtable = false;
int subtableOffset = 0;
for (int i = 0; i < numRecords; i++) {
int platformID = ReadUInt16();
int encodingID = ReadUInt16();
subtableOffset = (int) ReadUInt32();
if (platformID == 3 && encodingID == 1) {
format4subtable = true;
break;
}
}
if (!format4subtable) {
throw new Exception("Format 4 subtable not found in this font.");
}
index = tableOffset + subtableOffset;
int format = ReadUInt16();
int tableLen = ReadUInt16();
int language = ReadUInt16();
int segCount = ReadUInt16() / 2;
index += 6; // Skip to the endCount[]
int[] endCount = new int[segCount];
for (int j = 0; j < segCount; j++) {
endCount[j] = ReadUInt16();
}
index += 2; // Skip the reservedPad
int[] startCount = new int[segCount];
for (int j = 0; j < segCount; j++) {
startCount[j] = ReadUInt16();
}
short[] idDelta = new short[segCount];
for (int j = 0; j < segCount; j++) {
idDelta[j] = (short) ReadUInt16();
}
int[] idRangeOffset = new int[segCount];
for (int j = 0; j < segCount; j++) {
idRangeOffset[j] = ReadUInt16();
}
int[] glyphIdArray = new int[(tableLen - (16 + 8*segCount)) / 2];
for (int j = 0; j < glyphIdArray.Length; j++) {
glyphIdArray[j] = ReadUInt16();
}
glyphWidth = new int[lastChar + 1];
for (int i = 0; i < glyphWidth.Length; i++) { glyphWidth[i] = advanceWidth[0]; }
for (int c = firstChar; c <= lastChar; c++) {
int seg = GetSegmentFor(c, startCount, endCount, segCount);
if (seg != -1) {
int gid;
int offset = idRangeOffset[seg];
if (offset == 0) {
gid = (idDelta[seg] + c) % 65536;
}
else {
offset /= 2;
offset -= segCount - seg;
gid = glyphIdArray[offset + (c - startCount[seg])];
if (gid != 0) {
gid += idDelta[seg] % 65536;
}
}
if (gid < advanceWidth.Length) {
glyphWidth[c] = advanceWidth[gid];
}
unicodeToGID[c] = gid;
}
}
}
private void Post(FontTable table)
{
index = table.offset;
postVersion = ReadUInt32();
italicAngle = ReadUInt32();
underlinePosition = (short) ReadUInt16();
underlineThickness = (short) ReadUInt16();
}
private void GSUB(FontTable table)
{
index = table.offset;
int tableOffset = index;
/*
* Type Name Description
* Fixed Version Version of the GSUB table-initially set to 0x00010000
* Offset ScriptList Offset to ScriptList table-from beginning of GSUB table
* Offset FeatureList Offset to FeatureList table-from beginning of GSUB table
* Offset LookupList Offset to LookupList table-from beginning of GSUB table
*/
long version = ReadUInt32();
int scriptList = ReadUInt16();
int featureList = ReadUInt16();
int lookupList = ReadUInt16();
/*
* Console.WriteLine();
* Console.WriteLine("GSUB");
* Console.WriteLine("version == " + version.ToString("x"));
*/
index = tableOffset + scriptList;
int scriptCount = ReadUInt16();
// Console.WriteLine("scriptCount == " + scriptCount);
for (int i = 0; i < scriptCount; i++)
{
}
index = tableOffset + featureList;
int featureCount = ReadUInt16();
// Console.WriteLine("featureCount == " + featureCount);
for (int i = 0; i < featureCount; i++)
{
}
index = tableOffset + lookupList;
int lookupCount = ReadUInt16();
// Console.WriteLine("lookupCount == " + lookupCount);
int[] lookupTable = new int[lookupCount];
for (int i = 0; i < lookupCount; i++)
{
lookupTable[i] = ReadUInt16();
}
for (int i = 0; i < lookupTable.Length; i++)
{
index = tableOffset + lookupList + lookupTable[i];
int lookupType = ReadUInt16();
int lookupFlag = ReadUInt16();
int subTableCount = ReadUInt16();
/*
* Console.WriteLine("lookupType == " + lookupType);
* Console.WriteLine("lookupFlag == " + lookupFlag);
* Console.WriteLine("subTableCount == " + subTableCount);
*/
}
}
private void CFF_(FontTable table)
{
this.cff = true;
this.cff_off = table.offset;
this.cff_len = table.length;
}
private void Cmap(FontTable table)
{
index = table.offset;
int tableOffset = index;
index += 2;
int numRecords = ReadUInt16();
// Process the encoding records
bool format4subtable = false;
int subtableOffset = 0;
for (int i = 0; i < numRecords; i++)
{
int platformID = ReadUInt16();
int encodingID = ReadUInt16();
subtableOffset = (int)ReadUInt32();
if (platformID == 3 && encodingID == 1)
{
format4subtable = true;
break;
}
}
if (!format4subtable)
{
throw new Exception("Format 4 subtable not found in this font.");
}
index = tableOffset + subtableOffset;
int format = ReadUInt16();
int tableLen = ReadUInt16();
int language = ReadUInt16();
int segCount = ReadUInt16() / 2;
index += 6; // Skip to the endCount[]
int[] endCount = new int[segCount];
for (int j = 0; j < segCount; j++)
{
endCount[j] = ReadUInt16();
}
index += 2; // Skip the reservedPad
int[] startCount = new int[segCount];
for (int j = 0; j < segCount; j++)
{
startCount[j] = ReadUInt16();
}
short[] idDelta = new short[segCount];
for (int j = 0; j < segCount; j++)
{
idDelta[j] = (short)ReadUInt16();
}
int[] idRangeOffset = new int[segCount];
for (int j = 0; j < segCount; j++)
{
idRangeOffset[j] = ReadUInt16();
}
int[] glyphIdArray = new int[(tableLen - (16 + 8 * segCount)) / 2];
for (int j = 0; j < glyphIdArray.Length; j++)
{
glyphIdArray[j] = ReadUInt16();
}
glyphWidth = new int[lastChar + 1];
for (int i = 0; i < glyphWidth.Length; i++)
{
glyphWidth[i] = advanceWidth[0];
}
for (int c = firstChar; c <= lastChar; c++)
{
int seg = GetSegmentFor(c, startCount, endCount, segCount);
if (seg != -1)
{
int gid;
int offset = idRangeOffset[seg];
if (offset == 0)
{
gid = (idDelta[seg] + c) % 65536;
}
else
{
offset /= 2;
offset -= segCount - seg;
gid = glyphIdArray[offset + (c - startCount[seg])];
if (gid != 0)
{
gid += idDelta[seg] % 65536;
}
}
if (gid < advanceWidth.Length)
{
glyphWidth[c] = advanceWidth[gid];
}
unicodeToGID[c] = gid;
}
}
}
private void Name(FontTable table)
{
index = table.offset;
int tableOffset = index;
int format = ReadUInt16();
int count = ReadUInt16();
int stringOffset = ReadUInt16();
for (int r = 0; r < count; r++) {
int platformID = ReadUInt16();
int encodingID = ReadUInt16();
int languageID = ReadUInt16();
int nameID = ReadUInt16();
int length = ReadUInt16();
int offset = ReadUInt16();
int fontNameOffset = tableOffset + stringOffset + offset;
if (platformID == 1) { // Macintosh
if (encodingID == 0 && languageID == 0 && nameID == 6) {
index = fontNameOffset;
char[] buf = new char[length];
for (int i = 0; i < length; i++) {
buf[i] = (char) ReadByte();
}
fontName = new String(buf);
break;
}
}
else if (platformID == 3) { // Windows
if (encodingID == 1 && languageID == 0x409 && nameID == 6) {
index = fontNameOffset;
int len = length/2;
char[] buf = new char[len];
for (int i = 0; i < len; i++) {
byte b1 = ReadByte();
byte b2 = ReadByte();
buf[i] = (char) b2;
}
fontName = new String(buf);
break;
}
}
}
}
private void OS_2(FontTable table)
{
index = table.offset + 64;
firstChar = ReadUInt16();
lastChar = ReadUInt16();
index += 20;
capHeight = (short) ReadUInt16();
}
public OTF(Stream stream)
{
this.stream = stream;
this.baos = new MemoryStream();
byte[] buffer = new byte[0x10000];
int count;
while ((count = stream.Read(buffer, 0, buffer.Length)) > 0)
{
baos.Write(buffer, 0, count);
}
stream.Dispose();
buf = baos.ToArray();
baos = new MemoryStream();
dos = new DeflaterOutputStream(baos);
// Extract OTF metadata
long version = ReadUInt32();
if (version == 0x00010000L || // Win OTF
version == 0x74727565L || // Mac TTF
version == 0x4F54544FL) // CFF OTF
// We should be able to read this font
{
}
else
{
throw new Exception(
"OTF version == " + version + " is not supported.");
}
int numOfTables = ReadUInt16();
int searchRange = ReadUInt16();
int entrySelector = ReadUInt16();
int rangeShift = ReadUInt16();
FontTable cmapTable = null;
for (int i = 0; i < numOfTables; i++)
{
char[] name = new char[4];
for (int j = 0; j < 4; j++)
{
name[j] = (char)ReadByte();
}
FontTable table = new FontTable();
table.name = new String(name);
table.checkSum = ReadUInt32();
table.offset = (int)ReadUInt32();
table.length = (int)ReadUInt32();
int k = index; // Save the current index
if (table.name.Equals("head"))
{
Head(table);
}
else if (table.name.Equals("hhea"))
{
Hhea(table);
}
else if (table.name.Equals("OS/2"))
{
OS_2(table);
}
else if (table.name.Equals("name"))
{
Name(table);
}
else if (table.name.Equals("hmtx"))
{
Hmtx(table);
}
else if (table.name.Equals("post"))
{
Post(table);
}
else if (table.name.Equals("CFF "))
{
CFF_(table);
}
else if (table.name.Equals("GSUB"))
{
GSUB(table);
}
else if (table.name.Equals("cmap"))
{
cmapTable = table;
}
index = k; // Restore the index
}
// This table must be processed last
Cmap(cmapTable);
if (cff)
{
dos.Write(buf, cff_off, cff_len);
}
else
{
dos.Write(buf, 0, buf.Length);
}
dos.Finish();
}
public OTF(Stream stream)
{
this.stream = stream;
this.baos = new MemoryStream();
byte[] buffer = new byte[0x10000];
int count;
while ((count = stream.Read(buffer, 0, buffer.Length)) > 0) {
baos.Write(buffer, 0, count);
}
stream.Dispose();
buf = baos.ToArray();
baos = new MemoryStream();
dos = new DeflaterOutputStream(baos);
// Extract OTF metadata
long version = ReadUInt32();
if (version == 0x00010000L || // Win OTF
version == 0x74727565L || // Mac TTF
version == 0x4F54544FL) { // CFF OTF
// We should be able to read this font
}
else {
throw new Exception(
"OTF version == " + version + " is not supported.");
}
int numOfTables = ReadUInt16();
int searchRange = ReadUInt16();
int entrySelector = ReadUInt16();
int rangeShift = ReadUInt16();
FontTable cmapTable = null;
for (int i = 0; i < numOfTables; i++) {
char[] name = new char[4];
for (int j = 0; j < 4; j++) {
name[j] = (char) ReadByte();
}
FontTable table = new FontTable();
table.name = new String(name);
table.checkSum = ReadUInt32();
table.offset = (int) ReadUInt32();
table.length = (int) ReadUInt32();
int k = index; // Save the current index
if (table.name.Equals("head")) { Head(table); }
else if (table.name.Equals("hhea")) { Hhea(table); }
else if (table.name.Equals("OS/2")) { OS_2(table); }
else if (table.name.Equals("name")) { Name(table); }
else if (table.name.Equals("hmtx")) { Hmtx(table); }
else if (table.name.Equals("post")) { Post(table); }
else if (table.name.Equals("CFF ")) { CFF_(table); }
else if (table.name.Equals("GSUB")) { GSUB(table); }
else if (table.name.Equals("cmap")) { cmapTable = table; }
index = k; // Restore the index
}
// This table must be processed last
Cmap(cmapTable);
if (cff) {
dos.Write(buf, cff_off, cff_len);
}
else {
dos.Write(buf, 0, buf.Length);
}
dos.Finish();
}
private void CFF_(FontTable table)
{
this.cff = true;
this.cff_off = table.offset;
this.cff_len = table.length;
}
