public uint GetNumPadBytesAfterTable(OTTable t)
{
long TableFilePos = t.GetBuffer().GetFilePos();
if (TableFilePos == -1)
{
// the table's file position is initialized to -1 if the table was not read from a file
throw new ApplicationException("invalid file position");
}
uint TableLength = t.GetBuffer().GetLength();
long PadFilePos = TableFilePos + TableLength;
long NextTablePos = m_fs.Length;
// possible DSIG in TTC after all the tables
if (IsCollection() && m_ttch.DsigTag != null && (string)m_ttch.DsigTag == "DSIG" && m_ttch.DsigOffset > 0 && m_ttch.DsigOffset < NextTablePos && (string)t.m_tag != "DSIG")
{
NextTablePos = m_ttch.DsigOffset;
}
for (uint iFont = 0; iFont < m_nFonts; iFont++)
{
if (IsCollection())
{
uint offset = (uint)m_ttch.DirectoryOffsets[(int)iFont];
if (offset >= PadFilePos && offset < NextTablePos)
{
NextTablePos = offset;
}
}
OTFont f = GetFont(iFont);
for (ushort iTable = 0; iTable < f.GetNumTables(); iTable++)
{
DirectoryEntry de = f.GetDirectoryEntry(iTable);
if (de.offset >= PadFilePos && de.offset < NextTablePos)
{
NextTablePos = de.offset;
}
}
}
return((uint)(NextTablePos - PadFilePos));
}
/// <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);
}
/// <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;
}