// generate a new table from the cached data
public override OTTable GenerateTable()
{
// create a Motorola Byte Order buffer for the new table
MBOBuffer newbuf = new MBOBuffer(54);
// populate the buffer
newbuf.SetFixed(m_TableVersion, (uint)Table_head.FieldOffsets.TableVersionNumber);
newbuf.SetFixed(m_fontRevision, (uint)Table_head.FieldOffsets.fontRevision);
newbuf.SetUint(m_checkSumAdjustment, (uint)Table_head.FieldOffsets.checkSumAdjustment);
newbuf.SetUint(m_magicNumber, (uint)Table_head.FieldOffsets.magicNumber);
newbuf.SetUshort(m_flags, (uint)Table_head.FieldOffsets.flags);
newbuf.SetUshort(m_unitsPerEm, (uint)Table_head.FieldOffsets.unitsPerEm);
newbuf.SetLong(m_created, (uint)Table_head.FieldOffsets.created);
newbuf.SetLong(m_modified, (uint)Table_head.FieldOffsets.modified);
newbuf.SetShort(m_xMin, (uint)Table_head.FieldOffsets.xMin);
newbuf.SetShort(m_yMin, (uint)Table_head.FieldOffsets.yMin);
newbuf.SetShort(m_xMax, (uint)Table_head.FieldOffsets.xMax);
newbuf.SetShort(m_yMax, (uint)Table_head.FieldOffsets.yMax);
newbuf.SetUshort(m_macStyle, (uint)Table_head.FieldOffsets.macStyle);
newbuf.SetUshort(m_lowestRecPPEM, (uint)Table_head.FieldOffsets.lowestRecPPEM);
newbuf.SetShort(m_fontDirectionHint, (uint)Table_head.FieldOffsets.fontDirectionHint);
newbuf.SetShort(m_indexToLocFormat, (uint)Table_head.FieldOffsets.indexToLocFormat);
newbuf.SetShort(m_glyphDataFormat, (uint)Table_head.FieldOffsets.glyphDataFormat);
// put the buffer into a Table_head object and return it
Table_head headTable = new Table_head("head", newbuf);
return(headTable);
}
protected int Format(OTFont fontOwner)
{
// sets format without validating it
if (this.m_format == Table_loca.ValueInvalid)
{
Table_head headTable = (Table_head)fontOwner.GetTable("head");
if (headTable != null)
{
this.m_format = headTable.indexToLocFormat;
}
}
return(this.m_format);
}
/// <summary>Get modified date from "name" table, or <c>1/1/1904</c> if
/// no "name" table yet.</summary>
public DateTime GetFontModifiedDate()
{
// default to Jan 1, 1904 if unavailable
DateTime dt = new DateTime(1904, 1, 1);
try
{
Table_head headTable = (Table_head)GetTable("head");
if (headTable != null)
{
dt = headTable.GetModifiedDateTime();
}
}
catch
{
}
return(dt);
}
// constructor
public head_cache(Table_head OwnerTable)
{
// copy the data from the owner table's MBOBuffer
// and store it in the cache variables
m_TableVersion = OwnerTable.TableVersionNumber;
m_fontRevision = OwnerTable.fontRevision;
m_checkSumAdjustment = OwnerTable.checkSumAdjustment;
m_magicNumber = OwnerTable.magicNumber;
m_flags = OwnerTable.flags;
m_unitsPerEm = OwnerTable.unitsPerEm;
m_created = OwnerTable.created;
m_modified = OwnerTable.modified;
m_xMin = OwnerTable.xMin;
m_yMin = OwnerTable.yMin;
m_xMax = OwnerTable.xMax;
m_yMax = OwnerTable.yMax;
m_macStyle = OwnerTable.macStyle;
m_lowestRecPPEM = OwnerTable.lowestRecPPEM;
m_fontDirectionHint = OwnerTable.fontDirectionHint;
m_indexToLocFormat = OwnerTable.indexToLocFormat;
m_glyphDataFormat = OwnerTable.glyphDataFormat;
}
public virtual OTTable CreateTableObject(OTTag tag, MBOBuffer buf)
{
OTTable table = null;
string sName = GetUnaliasedTableName(tag);
switch (sName)
{
case "BASE": table = new Table_BASE(tag, buf); break;
case "CFF ": table = new Table_CFF(tag, buf); break;
case "cmap": table = new Table_cmap(tag, buf); break;
case "cvt ": table = new Table_cvt(tag, buf); break;
case "DSIG": table = new Table_DSIG(tag, buf); break;
case "EBDT": table = new Table_EBDT(tag, buf); break;
case "EBLC": table = new Table_EBLC(tag, buf); break;
case "EBSC": table = new Table_EBSC(tag, buf); break;
case "fpgm": table = new Table_fpgm(tag, buf); break;
case "gasp": table = new Table_gasp(tag, buf); break;
case "GDEF": table = new Table_GDEF(tag, buf); break;
case "glyf": table = new Table_glyf(tag, buf); break;
case "GPOS": table = new Table_GPOS(tag, buf); break;
case "GSUB": table = new Table_GSUB(tag, buf); break;
case "hdmx": table = new Table_hdmx(tag, buf); break;
case "head": table = new Table_head(tag, buf); break;
case "hhea": table = new Table_hhea(tag, buf); break;
case "hmtx": table = new Table_hmtx(tag, buf); break;
case "JSTF": table = new Table_JSTF(tag, buf); break;
case "kern": table = new Table_kern(tag, buf); break;
case "loca": table = new Table_loca(tag, buf); break;
case "LTSH": table = new Table_LTSH(tag, buf); break;
case "maxp": table = new Table_maxp(tag, buf); break;
case "name": table = new Table_name(tag, buf); break;
case "OS/2": table = new Table_OS2(tag, buf); break;
case "PCLT": table = new Table_PCLT(tag, buf); break;
case "post": table = new Table_post(tag, buf); break;
case "prep": table = new Table_prep(tag, buf); break;
case "VDMX": table = new Table_VDMX(tag, buf); break;
case "vhea": table = new Table_vhea(tag, buf); break;
case "vmtx": table = new Table_vmtx(tag, buf); break;
case "VORG": table = new Table_VORG(tag, buf); break;
//case "Zapf": table = new Table_Zapf(tag, buf); break;
default: table = new Table__Unknown(tag, buf); break;
}
return(table);
}
public virtual OTTable CreateTableObject(OTTag tag, MBOBuffer buf)
{
OTTable table = null;
string sName = GetUnaliasedTableName(tag);
switch (sName)
{
case "BASE": table = new Table_BASE(tag, buf); break;
case "CFF ": table = new Table_CFF(tag, buf); break;
case "cmap": table = new Table_cmap(tag, buf); break;
case "cvt ": table = new Table_cvt(tag, buf); break;
case "DSIG": table = new Table_DSIG(tag, buf); break;
case "EBDT": table = new Table_EBDT(tag, buf); break;
case "EBLC": table = new Table_EBLC(tag, buf); break;
case "EBSC": table = new Table_EBSC(tag, buf); break;
case "fpgm": table = new Table_fpgm(tag, buf); break;
case "gasp": table = new Table_gasp(tag, buf); break;
case "GDEF": table = new Table_GDEF(tag, buf); break;
case "glyf": table = new Table_glyf(tag, buf); break;
case "GPOS": table = new Table_GPOS(tag, buf); break;
case "GSUB": table = new Table_GSUB(tag, buf); break;
case "hdmx": table = new Table_hdmx(tag, buf); break;
case "head": table = new Table_head(tag, buf); break;
case "hhea": table = new Table_hhea(tag, buf); break;
case "hmtx": table = new Table_hmtx(tag, buf); break;
case "JSTF": table = new Table_JSTF(tag, buf); break;
case "kern": table = new Table_kern(tag, buf); break;
case "loca": table = new Table_loca(tag, buf); break;
case "LTSH": table = new Table_LTSH(tag, buf); break;
case "maxp": table = new Table_maxp(tag, buf); break;
case "name": table = new Table_name(tag, buf); break;
case "OS/2": table = new Table_OS2(tag, buf); break;
case "PCLT": table = new Table_PCLT(tag, buf); break;
case "post": table = new Table_post(tag, buf); break;
case "prep": table = new Table_prep(tag, buf); break;
case "VDMX": table = new Table_VDMX(tag, buf); break;
case "vhea": table = new Table_vhea(tag, buf); break;
case "vmtx": table = new Table_vmtx(tag, buf); break;
case "VORG": table = new Table_VORG(tag, buf); break;
//case "Zapf": table = new Table_Zapf(tag, buf); break;
default: table = new Table__Unknown(tag, buf); break;
}
return table;
}
/// <summary>Write a TTC (TT Collection) to a disk file.</summary>
public static bool WriteTTCFile(FileStream fs, OTFont[] fonts)
{
bool bRet = true;
// build the TTC header
OTTag TTCtag = (OTTag)"ttcf";
uint version = 0x00020000;
uint DirectoryCount = (uint)fonts.Length;
uint [] TableDirectory = new uint[fonts.Length];
uint ulDsigTag = 0;
uint ulDsigLength = 0;
uint ulDsigOffset = 0;
uint TTCHeaderLen = 12 + DirectoryCount * 4 + 12; // length of version 2.0 header
// build an array of offset tables
OffsetTable[] otArr = new OffsetTable[fonts.Length];
for (int iFont = 0; iFont < fonts.Length; iFont++)
{
otArr[iFont] = new OffsetTable(new OTFixed(1, 0), fonts[iFont].GetNumTables());
}
// build an array of head tables that will contain the updated modified field and font checksum
Table_head[] arrHeadTables = new Table_head[fonts.Length];
for (int i = 0; i < fonts.Length; i++)
{
// get the cache
Table_head headTable = (Table_head)fonts[i].GetTable("head");
Table_head.head_cache headCache = (Table_head.head_cache)headTable.GetCache();
// set the 'modified' field to the current date
DateTime dt = DateTime.Now;
headCache.modified = headTable.DateTimeToSecondsSince1904(dt);
// generate a new table and add it to the array
Table_head newHead = (Table_head)headCache.GenerateTable();
arrHeadTables[i] = newHead;
}
// build a list of directory entries for each font
long FilePos = TTCHeaderLen;
for (int iFont = 0; iFont < fonts.Length; iFont++)
{
ushort numTables = fonts[iFont].GetNumTables();
TableDirectory[iFont] = (uint)FilePos;
FilePos += 12 + numTables * 16;
uint PrevFilePos = 0;
for (ushort i = 0; i < numTables; i++)
{
OTTable table = fonts[iFont].GetTable(i);
OTTag tag = table.m_tag;
if ((string)tag == "head")
{
table = arrHeadTables[iFont];
}
// check if this table is a duplicate of a table in a previous font
PrevFilePos = 0;
if (iFont > 0)
{
for (int iPrevFont = 0; iPrevFont < iFont; iPrevFont++)
{
for (int iTable = 0; iTable < fonts[iPrevFont].GetNumTables(); iTable++)
{
OTTable PrevTable = fonts[iPrevFont].GetTable(table.m_tag);
if (PrevTable != null)
{
if (MBOBuffer.BinaryEqual(table.m_bufTable, PrevTable.m_bufTable))
{
// get the file position for the previous table
for (int iDe = 0; iDe < otArr[iPrevFont].DirectoryEntries.Count; iDe++)
{
DirectoryEntry dePrev = (DirectoryEntry)otArr[iPrevFont].DirectoryEntries[iDe];
if (dePrev.tag == table.m_tag)
{
PrevFilePos = dePrev.offset;
break;
}
}
}
}
}
}
}
// build a new directory entry
DirectoryEntry de = new DirectoryEntry();
de.tag = new OTTag(tag.GetBytes());
de.checkSum = table.CalcChecksum();
de.length = table.GetLength();
if (PrevFilePos != 0)
{
de.offset = (uint)PrevFilePos;
}
else
{
de.offset = (uint)FilePos;
FilePos += table.GetBuffer().GetPaddedLength();
}
otArr[iFont].DirectoryEntries.Add(de);
}
// sort the directory entries
if (numTables > 1)
{
for (int i = 0; i < numTables - 1; i++)
{
for (int j = i + 1; j < numTables; j++)
{
if (((DirectoryEntry)otArr[iFont].DirectoryEntries[i]).tag > ((DirectoryEntry)otArr[iFont].DirectoryEntries[j]).tag)
{
DirectoryEntry temp = (DirectoryEntry)otArr[iFont].DirectoryEntries[i];
otArr[iFont].DirectoryEntries[i] = (DirectoryEntry)otArr[iFont].DirectoryEntries[j];
otArr[iFont].DirectoryEntries[j] = temp;
}
}
}
}
}
// update each font's checksum in the head table
for (int iFont = 0; iFont < fonts.Length; iFont++)
{
ushort numTables = fonts[iFont].GetNumTables();
// calculate the checksum
uint sum = 0;
sum += otArr[iFont].CalcOffsetTableChecksum();
sum += otArr[iFont].CalcDirectoryEntriesChecksum();
for (ushort i = 0; i < numTables; i++)
{
DirectoryEntry de = (DirectoryEntry)otArr[iFont].DirectoryEntries[i];
OTTable table = fonts[iFont].GetTable(de.tag);
if ((string)de.tag == "head")
{
table = arrHeadTables[iFont];
}
sum += table.CalcChecksum();
}
// get the cache
Table_head headTable = arrHeadTables[iFont];
Table_head.head_cache headCache = (Table_head.head_cache)headTable.GetCache();
// set the checkSumAdujustment field
headCache.checkSumAdjustment = 0xb1b0afba - sum;
// generate a new table and replace the head table in the array of head tables
Table_head newHead = (Table_head)headCache.GenerateTable();
arrHeadTables[iFont] = newHead;
}
// write the TTC header
WriteUint32MBO(fs, (uint)TTCtag);
WriteUint32MBO(fs, version);
WriteUint32MBO(fs, DirectoryCount);
for (int i = 0; i < fonts.Length; i++)
{
WriteUint32MBO(fs, TableDirectory[i]);
}
WriteUint32MBO(fs, ulDsigTag);
WriteUint32MBO(fs, ulDsigLength);
WriteUint32MBO(fs, ulDsigOffset);
// write out each font
for (int iFont = 0; iFont < fonts.Length; iFont++)
{
ushort numTables = fonts[iFont].GetNumTables();
// write the offset table
fs.Write(otArr[iFont].m_buf.GetBuffer(), 0, (int)otArr[iFont].m_buf.GetLength());
// write the directory entries
for (int i = 0; i < numTables; i++)
{
DirectoryEntry de = (DirectoryEntry)otArr[iFont].DirectoryEntries[i];
fs.Write(de.m_buf.GetBuffer(), 0, (int)de.m_buf.GetLength());
}
// write out each table unless a shared version has been written
for (ushort i = 0; i < numTables; i++)
{
DirectoryEntry de = (DirectoryEntry)otArr[iFont].DirectoryEntries[i];
if (fs.Position == de.offset)
{
OTTable table = fonts[iFont].GetTable(de.tag);
if ((string)table.m_tag == "head")
{
table = arrHeadTables[iFont];
}
fs.Write(table.m_bufTable.GetBuffer(), 0, (int)table.GetBuffer().GetPaddedLength());
}
}
}
return(bRet);
}
/// <summary>Write a single OTF to a disk file, with tables in
/// proper order, checksums set, etc.
/// </summary>
public static bool WriteSfntFile(FileStream fs, OTFont font)
{
bool bRet = true;
OTFixed sfntVersion = new OTFixed(1, 0);
ushort numTables = font.GetNumTables();
OffsetTable ot = new OffsetTable(sfntVersion, numTables);
// order tables in fastfont order
string [] arrOrderedNames = null;
string [] ttNames =
{
"head", "hhea", "maxp", "OS/2", "hmtx", "LTSH", "VDMX", "hdmx", "cmap", "fpgm",
"prep", "cvt ", "loca", "glyf", "kern", "name", "post", "gasp", "PCLT"
};
string [] psNames =
{
"head", "hhea", "maxp", "OS/2", "name", "cmap", "post", "CFF "
};
if (font.ContainsTrueTypeOutlines())
{
arrOrderedNames = ttNames;
}
else if (font.ContainsPostScriptOutlines())
{
arrOrderedNames = psNames;
}
OTTable[] OrderedTables = new OTTable[numTables];
for (ushort i = 0; i < numTables; i++)
{
OrderedTables[i] = font.GetTable(i);
}
if (arrOrderedNames != null)
{
ushort curpos = 0;
for (int iName = 0; iName < arrOrderedNames.Length; iName++)
{
for (ushort i = curpos; i < numTables; i++)
{
if (arrOrderedNames[iName] == (string)OrderedTables[i].m_tag)
{
OTTable temp = OrderedTables[curpos];
OrderedTables[curpos] = OrderedTables[i];
OrderedTables[i] = temp;
curpos++;
break;
}
}
}
}
// update the modified date in the head table
for (int i = 0; i < OrderedTables.Length; i++)
{
if ((string)OrderedTables[i].m_tag == "head")
{
// get the cache
Table_head headTable = (Table_head)OrderedTables[i];
Table_head.head_cache headCache = (Table_head.head_cache)headTable.GetCache();
// set the 'modified' field to the current date and time
DateTime dt = DateTime.Now;
headCache.modified = headTable.DateTimeToSecondsSince1904(dt);
// generate a new table and replace the head table in the list of ordered tables
Table_head newHead = (Table_head)headCache.GenerateTable();
OrderedTables[i] = newHead;
break;
}
}
// build a list of directory entries
long TableFilePos = 12 + numTables * 16;
for (ushort i = 0; i < numTables; i++)
{
OTTable table = OrderedTables[i];
OTTag tag = table.m_tag;
// build a new directory entry
DirectoryEntry de = new DirectoryEntry();
de.tag = new OTTag(tag.GetBytes());
de.checkSum = table.CalcChecksum();
de.offset = (uint)TableFilePos;
de.length = table.GetLength();
ot.DirectoryEntries.Add(de);
TableFilePos += table.GetBuffer().GetPaddedLength();
}
// sort the directory entries
if (numTables > 1)
{
for (int i = 0; i < numTables - 1; i++)
{
for (int j = i + 1; j < numTables; j++)
{
if (((DirectoryEntry)(ot.DirectoryEntries[i])).tag > ((DirectoryEntry)(ot.DirectoryEntries[j])).tag)
{
DirectoryEntry temp = (DirectoryEntry)ot.DirectoryEntries[i];
ot.DirectoryEntries[i] = (DirectoryEntry)ot.DirectoryEntries[j];
ot.DirectoryEntries[j] = temp;
}
}
}
}
// update the font checksum in the head table
for (int i = 0; i < OrderedTables.Length; i++)
{
if ((string)OrderedTables[i].m_tag == "head")
{
// calculate the checksum
uint sum = 0;
sum += ot.CalcOffsetTableChecksum();
sum += ot.CalcDirectoryEntriesChecksum();
for (int j = 0; j < OrderedTables.Length; j++)
{
sum += OrderedTables[j].CalcChecksum();
}
// get the cache
Table_head headTable = (Table_head)OrderedTables[i];
Table_head.head_cache headCache = (Table_head.head_cache)headTable.GetCache();
// set the checkSumAdujustment field
headCache.checkSumAdjustment = 0xb1b0afba - sum;
// generate a new table and replace the head table in the list of ordered tables
Table_head newHead = (Table_head)headCache.GenerateTable();
OrderedTables[i] = newHead;
break;
}
}
// write the offset table
fs.Write(ot.m_buf.GetBuffer(), 0, (int)ot.m_buf.GetLength());
// write the directory entries
for (int i = 0; i < numTables; i++)
{
DirectoryEntry de = (DirectoryEntry)ot.DirectoryEntries[i];
fs.Write(de.m_buf.GetBuffer(), 0, (int)de.m_buf.GetLength());
}
// write the tables
for (ushort i = 0; i < numTables; i++)
{
OTTable table = OrderedTables[i];
fs.Write(table.m_bufTable.GetBuffer(), 0, (int)table.GetBuffer().GetPaddedLength());
}
return(bRet);
}
// generate a new table from the cached data
public override OTTable GenerateTable()
{
// create a Motorola Byte Order buffer for the new table
MBOBuffer newbuf = new MBOBuffer(54);
// populate the buffer
newbuf.SetFixed (m_TableVersion, (uint)Table_head.FieldOffsets.TableVersionNumber);
newbuf.SetFixed (m_fontRevision, (uint)Table_head.FieldOffsets.fontRevision);
newbuf.SetUint (m_checkSumAdjustment, (uint)Table_head.FieldOffsets.checkSumAdjustment);
newbuf.SetUint (m_magicNumber, (uint)Table_head.FieldOffsets.magicNumber);
newbuf.SetUshort(m_flags, (uint)Table_head.FieldOffsets.flags);
newbuf.SetUshort(m_unitsPerEm, (uint)Table_head.FieldOffsets.unitsPerEm);
newbuf.SetLong (m_created, (uint)Table_head.FieldOffsets.created);
newbuf.SetLong (m_modified, (uint)Table_head.FieldOffsets.modified);
newbuf.SetShort (m_xMin, (uint)Table_head.FieldOffsets.xMin);
newbuf.SetShort (m_yMin, (uint)Table_head.FieldOffsets.yMin);
newbuf.SetShort (m_xMax, (uint)Table_head.FieldOffsets.xMax);
newbuf.SetShort (m_yMax, (uint)Table_head.FieldOffsets.yMax);
newbuf.SetUshort(m_macStyle, (uint)Table_head.FieldOffsets.macStyle);
newbuf.SetUshort(m_lowestRecPPEM, (uint)Table_head.FieldOffsets.lowestRecPPEM);
newbuf.SetShort (m_fontDirectionHint, (uint)Table_head.FieldOffsets.fontDirectionHint);
newbuf.SetShort (m_indexToLocFormat, (uint)Table_head.FieldOffsets.indexToLocFormat);
newbuf.SetShort (m_glyphDataFormat, (uint)Table_head.FieldOffsets.glyphDataFormat);
// put the buffer into a Table_head object and return it
Table_head headTable = new Table_head("head", newbuf);
return headTable;
}
// constructor
public head_cache(Table_head OwnerTable)
{
// copy the data from the owner table's MBOBuffer
// and store it in the cache variables
m_TableVersion = OwnerTable.TableVersionNumber;
m_fontRevision = OwnerTable.fontRevision;
m_checkSumAdjustment = OwnerTable.checkSumAdjustment;
m_magicNumber = OwnerTable.magicNumber;
m_flags = OwnerTable.flags;
m_unitsPerEm = OwnerTable.unitsPerEm;
m_created = OwnerTable.created;
m_modified = OwnerTable.modified;
m_xMin = OwnerTable.xMin;
m_yMin = OwnerTable.yMin;
m_xMax = OwnerTable.xMax;
m_yMax = OwnerTable.yMax;
m_macStyle = OwnerTable.macStyle;
m_lowestRecPPEM = OwnerTable.lowestRecPPEM;
m_fontDirectionHint = OwnerTable.fontDirectionHint;
m_indexToLocFormat = OwnerTable.indexToLocFormat;
m_glyphDataFormat = OwnerTable.glyphDataFormat;
}
/// <summary>Write a TTC (TT Collection) to a disk file.</summary>
public static bool WriteTTCFile(FileStream fs, OTFont[] fonts)
{
bool bRet = true;
// build the TTC header
OTTag TTCtag = (OTTag)"ttcf";
uint version = 0x00020000;
uint DirectoryCount = (uint)fonts.Length;
uint [] TableDirectory = new uint[fonts.Length];
uint ulDsigTag = 0;
uint ulDsigLength = 0;
uint ulDsigOffset = 0;
uint TTCHeaderLen = 12 + DirectoryCount * 4 + 12; // length of version 2.0 header
// build an array of offset tables
OffsetTable[] otArr = new OffsetTable[fonts.Length];
for (int iFont=0; iFont<fonts.Length; iFont++)
{
otArr[iFont] = new OffsetTable(new OTFixed(1,0), fonts[iFont].GetNumTables());
}
// build an array of head tables that will contain the updated modified field and font checksum
Table_head[] arrHeadTables = new Table_head[fonts.Length];
for (int i=0; i<fonts.Length; i++)
{
// get the cache
Table_head headTable = (Table_head)fonts[i].GetTable("head");
Table_head.head_cache headCache = (Table_head.head_cache)headTable.GetCache();
// set the 'modified' field to the current date
DateTime dt = DateTime.Now;
headCache.modified = headTable.DateTimeToSecondsSince1904(dt);
// generate a new table and add it to the array
Table_head newHead = (Table_head)headCache.GenerateTable();
arrHeadTables[i] = newHead;
}
// build a list of directory entries for each font
long FilePos = TTCHeaderLen;
for (int iFont = 0; iFont<fonts.Length; iFont++)
{
ushort numTables = fonts[iFont].GetNumTables();
TableDirectory[iFont] = (uint)FilePos;
FilePos += 12 + numTables*16;
uint PrevFilePos = 0;
for (ushort i=0; i<numTables; i++)
{
OTTable table = fonts[iFont].GetTable(i);
OTTag tag = table.m_tag;
if ((string)tag == "head")
{
table = arrHeadTables[iFont];
}
// check if this table is a duplicate of a table in a previous font
PrevFilePos = 0;
if (iFont > 0)
{
for (int iPrevFont=0; iPrevFont<iFont; iPrevFont++)
{
for (int iTable=0; iTable<fonts[iPrevFont].GetNumTables(); iTable++)
{
OTTable PrevTable = fonts[iPrevFont].GetTable(table.m_tag);
if (PrevTable != null)
{
if (MBOBuffer.BinaryEqual(table.m_bufTable, PrevTable.m_bufTable))
{
// get the file position for the previous table
for (int iDe=0; iDe<otArr[iPrevFont].DirectoryEntries.Count; iDe++)
{
DirectoryEntry dePrev = (DirectoryEntry)otArr[iPrevFont].DirectoryEntries[iDe];
if (dePrev.tag == table.m_tag)
{
PrevFilePos = dePrev.offset;
break;
}
}
}
}
}
}
}
// build a new directory entry
DirectoryEntry de = new DirectoryEntry();
de.tag = new OTTag(tag.GetBytes());
de.checkSum = table.CalcChecksum();
de.length = table.GetLength();
if (PrevFilePos != 0)
{
de.offset = (uint)PrevFilePos;
}
else
{
de.offset = (uint)FilePos;
FilePos += table.GetBuffer().GetPaddedLength();
}
otArr[iFont].DirectoryEntries.Add(de);
}
// sort the directory entries
if (numTables > 1)
{
for (int i=0; i<numTables-1; i++)
{
for (int j=i+1; j<numTables; j++)
{
if (((DirectoryEntry)otArr[iFont].DirectoryEntries[i]).tag > ((DirectoryEntry)otArr[iFont].DirectoryEntries[j]).tag)
{
DirectoryEntry temp = (DirectoryEntry)otArr[iFont].DirectoryEntries[i];
otArr[iFont].DirectoryEntries[i] = (DirectoryEntry)otArr[iFont].DirectoryEntries[j];
otArr[iFont].DirectoryEntries[j] = temp;
}
}
}
}
}
// update each font's checksum in the head table
for (int iFont=0; iFont<fonts.Length; iFont++)
{
ushort numTables = fonts[iFont].GetNumTables();
// calculate the checksum
uint sum = 0;
sum += otArr[iFont].CalcOffsetTableChecksum();
sum += otArr[iFont].CalcDirectoryEntriesChecksum();
for (ushort i=0; i<numTables; i++)
{
DirectoryEntry de = (DirectoryEntry)otArr[iFont].DirectoryEntries[i];
OTTable table = fonts[iFont].GetTable(de.tag);
if ((string)de.tag == "head")
{
table = arrHeadTables[iFont];
}
sum += table.CalcChecksum();
}
// get the cache
Table_head headTable = arrHeadTables[iFont];
Table_head.head_cache headCache = (Table_head.head_cache)headTable.GetCache();
// set the checkSumAdujustment field
headCache.checkSumAdjustment = 0xb1b0afba - sum;
// generate a new table and replace the head table in the array of head tables
Table_head newHead = (Table_head)headCache.GenerateTable();
arrHeadTables[iFont] = newHead;
}
// write the TTC header
WriteUint32MBO(fs, (uint)TTCtag);
WriteUint32MBO(fs, version);
WriteUint32MBO(fs, DirectoryCount);
for (int i=0; i<fonts.Length; i++)
{
WriteUint32MBO(fs, TableDirectory[i]);
}
WriteUint32MBO(fs, ulDsigTag);
WriteUint32MBO(fs, ulDsigLength);
WriteUint32MBO(fs, ulDsigOffset);
// write out each font
for (int iFont=0; iFont<fonts.Length; iFont++)
{
ushort numTables = fonts[iFont].GetNumTables();
// write the offset table
fs.Write(otArr[iFont].m_buf.GetBuffer(), 0, (int)otArr[iFont].m_buf.GetLength());
// write the directory entries
for (int i=0; i<numTables; i++)
{
DirectoryEntry de = (DirectoryEntry)otArr[iFont].DirectoryEntries[i];
fs.Write(de.m_buf.GetBuffer(), 0, (int)de.m_buf.GetLength());
}
// write out each table unless a shared version has been written
for (ushort i=0; i<numTables; i++)
{
DirectoryEntry de = (DirectoryEntry)otArr[iFont].DirectoryEntries[i];
if (fs.Position == de.offset)
{
OTTable table = fonts[iFont].GetTable(de.tag);
if ((string)table.m_tag == "head")
{
table = arrHeadTables[iFont];
}
fs.Write(table.m_bufTable.GetBuffer(), 0, (int)table.GetBuffer().GetPaddedLength());
}
}
}
return bRet;
}
