/************************
* public methods
*/
public OTTable GetTable(OTFont fontOwner, DirectoryEntry de)
{
// first try getting it from the table cache
OTTable table = GetTableFromCache(de);
if (table == null)
{
if ( de.length != 0
&& de.offset != 0
&& de.offset < m_file.GetFileLength()
&& de.offset + de.length <= m_file.GetFileLength())
{
// read the table from the file
MBOBuffer buf = m_file.ReadPaddedBuffer(de.offset, de.length);
if (buf != null)
{
// put the buffer into a table object
table = CreateTableObject(de.tag, buf);
// add the table to the cache
CachedTables.Add(table);
}
}
}
return table;
}
/// <summary>Return <c>true</c> iff <c>de</c> is for a
/// <c>DirectoryEntry</c> for a table equal to this one in
/// tag, checksum, file offset and length.
/// </summary>
public bool MatchDirectoryEntry(DirectoryEntry de)
{
bool bRet = true;
if (de.tag != m_tag)
{
bRet = false;
}
if (de.checkSum != CalcChecksum())
{
bRet = false;
}
if (!MatchFileOffsetLength(de.offset, de.length))
{
bRet = false;
}
return bRet;
}
/************************
* protected methods
*/
protected OTTable GetTableFromCache(DirectoryEntry de)
{
OTTable ot = null;
for (int i=0; i<CachedTables.Count; i++)
{
OTTable temp = (OTTable)CachedTables[i];
if (temp.MatchFileOffsetLength(de.offset, de.length))
{
ot = temp;
break;
}
}
return ot;
}
/// <summary>Notify observer of TableBegin and TableEnd events</summary>
public void OnTableValidationEvent(DirectoryEntry de, bool bBegin)
{
if (m_OnValidateEvent != null)
{
if (bBegin)
{
m_OnValidateEvent(EventTypes.TableBegin, de);
}
else
{
m_OnValidateEvent(EventTypes.TableEnd, de);
}
}
}
public void OnBeginTableTest(DirectoryEntry de)
{
StdOut("Table Test: " + (string)de.tag);
}
/// <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;
}
/******************
* protected methods
*/
protected static OffsetTable ReadOffsetTable(OTFile file, uint filepos)
{
// read the Offset Table from the file
const int SIZEOF_OFFSETTABLE = 12;
OffsetTable ot = null;
// read the offset table
MBOBuffer buf = file.ReadPaddedBuffer(filepos, SIZEOF_OFFSETTABLE);
if (buf != null)
{
if (OTFile.IsValidSfntVersion(buf.GetUint(0)))
{
ot = new OffsetTable(buf);
}
}
// now read the directory entries
if (ot != null)
{
const int SIZEOF_DIRECTORYENTRY = 16;
for (int i=0; i<ot.numTables; i++)
{
uint dirFilePos = (uint)(filepos+SIZEOF_OFFSETTABLE+i*SIZEOF_DIRECTORYENTRY);
MBOBuffer DirEntBuf = file.ReadPaddedBuffer(dirFilePos, SIZEOF_DIRECTORYENTRY);
if (DirEntBuf != null)
{
DirectoryEntry de = new DirectoryEntry(DirEntBuf);
ot.DirectoryEntries.Add(de);
}
else
{
Debug.Assert(false);
break;
}
}
}
return ot;
}
static byte[] get_TTF_digest( OTFile f )
{
OTFont fn = f.GetFont(0);
Table_DSIG tDSIG = (Table_DSIG) fn.GetTable("DSIG");
DirectoryEntry deDSIG = null;
// sort table by offset
Dictionary<uint, int> offsetlookup = new Dictionary<uint, int>();
var list = new List<uint>();
for (ushort i=0; i<fn.GetNumTables(); i++) {
DirectoryEntry de = fn.GetDirectoryEntry(i);
offsetlookup.Add(de.offset, i);
list.Add( de.offset );
if ((string) de.tag == "DSIG" )
deDSIG = de;
}
list.Sort();
// New offset table
var old_ot = fn.GetOffsetTable();
OffsetTable ot = new OffsetTable (old_ot.sfntVersion, (ushort) ( old_ot.numTables - 1) );
for (ushort i=0; i<fn.GetNumTables(); i++) {
DirectoryEntry oldde = fn.GetDirectoryEntry(i);
if ( (string) oldde.tag != "DSIG" )
{
DirectoryEntry de = new DirectoryEntry(oldde);
de.offset -=16; // one less entry
if ( de.offset > deDSIG.offset )
de.offset -= tDSIG.GetBuffer().GetPaddedLength();
ot.DirectoryEntries.Add(de);
}
}
hash.TransformBlock (ot.m_buf.GetBuffer(), 0, (int)ot.m_buf.GetLength(), ot.m_buf.GetBuffer(), 0);
for (int i=0; i< ot.DirectoryEntries.Count ; i++)
{
DirectoryEntry de = (DirectoryEntry)ot.DirectoryEntries[i];
hash.TransformBlock (de.m_buf.GetBuffer(), 0, (int)de.m_buf.GetLength(), de.m_buf.GetBuffer(), 0);
}
Table_head headTable = (Table_head) fn.GetTable("head");
// calculate the checksum
uint sum = 0;
sum += ot.CalcOffsetTableChecksum();
sum += ot.CalcDirectoryEntriesChecksum();
foreach (var key in list) {
OTTable table = fn.GetTable((ushort)offsetlookup[key]);
if ( (string) table.GetTag() != "DSIG")
sum += table.CalcChecksum();
}
Table_head.head_cache headCache = (Table_head.head_cache)headTable.GetCache();
// set the checkSumAdujustment field
headCache.checkSumAdjustment = 0xb1b0afba - sum;
Table_head newHead = (Table_head)headCache.GenerateTable();
foreach (var key in list) {
OTTable table = fn.GetTable((ushort)offsetlookup[key]);
if ( (string) table.GetTag() == "head" )
table = newHead;
if ( (string) table.GetTag() != "DSIG" ) {
hash.TransformBlock (table.m_bufTable.GetBuffer(), 0, (int)table.GetBuffer().GetPaddedLength(),
table.m_bufTable.GetBuffer(), 0);
}
}
byte[] usFlag = {0, 1};
hash.TransformFinalBlock(usFlag, 0,2);
return hash.Hash;
}
public void OnBeginTableTest( DirectoryEntry de )
{
string name = ( string )de.tag;
if (m_verbose == true && m_vp.IsTestingTable(name))
StdOut( "Table Test: " + name );
}
public DirectoryEntry(DirectoryEntry obj)
{
if (m_buf == null)
m_buf = new MBOBuffer(16);
tag = new OTTag(obj.tag.GetBytes());
checkSum = obj.checkSum;
offset = obj.offset;
length = obj.length;
}
private void OnBeginTable( DirectoryEntry de )
{
m_xmlWriter.WriteStartElement("TableEntry");
m_xmlWriter.WriteAttributeString("Tag", de.tag);
m_xmlWriter.WriteAttributeString("Offset",
"0x"+de.offset.ToString("x8"));
m_xmlWriter.WriteAttributeString("Length",
"0x"+de.length.ToString("x8"));
m_xmlWriter.WriteAttributeString("Checksum",
"0x"+de.checkSum.ToString("x8"));
m_xmlWriter.WriteAttributeString("CodeFriendlyTag",
MakeCodeFriendlyTag(de.tag));
m_xmlWriter.WriteWhitespace("\r\n");
m_callbacks.OnBeginTableTest( de );
}
/*****************
* protected methods
*/
/*****************
* public methods
*/
//meant to avoid code repetition (is called from OTFontVal too)
public bool ValidateTable(OTTable table, Validator v, DirectoryEntry de, OTFontVal fontOwner)
{
String tname = GetTableManager().GetUnaliasedTableName(de.tag);
bool bRet = true;
// verify the checksum value from the directory entry matches the checksum for the table
if (!(tname == "DSIG" && IsCollection()))
{
uint calcChecksum = 0;
if (table != null)
{
calcChecksum = table.CalcChecksum();
}
if (de.checkSum != calcChecksum)
{
string s = "table '" + de.tag + "', calc: 0x" + calcChecksum.ToString("x8") + ", font: 0x" + de.checkSum.ToString("x8");
v.Error(T.T_NULL, E._DE_E_ChecksumError, de.tag, s);
bRet = false;
}
}
// verify that table has pad bytes set to zero
if (table != null)
{
uint nBytes = GetNumPadBytesAfterTable(table);
bool bPadBytesZero = true;
if (nBytes != 0)
{
long PadFilePos = table.GetBuffer().GetFilePos() + table.GetBuffer().GetLength();
byte[] padbuf = ReadBytes(PadFilePos, nBytes);
for (int iByte = 0; iByte < padbuf.Length; iByte++)
{
if (padbuf[iByte] != 0)
{
bPadBytesZero = false;
break;
}
}
}
if (bPadBytesZero == false)
{
v.Warning(T.T_NULL, W._DE_W_PadBytesNotZero, de.tag, "after " + de.tag + " table");
}
}
// ask the table object to validate its data
if (!(tname == "DSIG" && IsCollection())) v.OnTableValidationEvent(de, true);
if (table != null)
{
if (v.TestTable(de.tag)) // don't test deselected tables
{
try
{
ITableValidate valtable = (ITableValidate)table;
bRet &= valtable.Validate(v, fontOwner);
}
catch (InvalidCastException e)
{
v.ApplicationError(T.T_NULL, E._Table_E_Exception, table.m_tag, e.ToString());
bRet = false;
}
}
else
{
v.Info(I._Table_I_NotSelected, de.tag);
}
}
else
{
if (de.length == 0)
{
// check if it's a known OT table type since zero length private tables seem allowable
if (TableManager.IsKnownOTTableType(de.tag))
{
v.Error(T.T_NULL, E._Table_E_Invalid, de.tag, "The directory entry length is zero");
bRet = false;
}
}
else if (de.offset == 0)
{
v.Error(T.T_NULL, E._Table_E_Invalid, de.tag, "The directory entry offset is zero");
bRet = false;
}
else if (de.offset > GetFileLength())
{
v.Error(T.T_NULL, E._Table_E_Invalid, de.tag, "The table offset points past end of file");
bRet = false;
}
else if (de.offset + de.length > GetFileLength())
{
v.Error(T.T_NULL, E._Table_E_Invalid, de.tag, "The table extends past end of file");
bRet = false;
}
else
{
v.Error(E._Table_E_Invalid, de.tag);
bRet = false;
}
}
if (!(tname == "DSIG" && IsCollection())) v.OnTableValidationEvent(de, false);
return bRet;
}
public bool Validate()
{
long StartTicks = DateTime.Now.Ticks;
bool bRet = true;
m_Validator.OnFileValidationEvent(this, true);
for (uint i=0; i<m_nFonts; i++)
{
// check to see if user canceled validation
if (m_Validator.CancelFlag)
{
bRet = false;
break;
}
m_Validator.OnFontValidationEvent(i, true);
OTFontVal f = GetFont(i);
if (f != null)
{
m_Validator.OnFontParsedEvent(f);
if(!f.Validate()) bRet = false;
}
m_Validator.OnFontValidationEvent(i, false);
}
// build the elapsed time string
int nSeconds = (int)((DateTime.Now.Ticks-StartTicks)/(double)10000000);
int nHours = nSeconds / 3600;
nSeconds = nSeconds - nHours*3600;
int nMins = nSeconds / 60;
nSeconds = nSeconds - nMins*60;
string sTime = nHours.ToString() + ":" + nMins.ToString("d2") + ":" + nSeconds.ToString("d2");
m_Validator.Info(T.T_NULL, I._GEN_I_TotalValTime, null, sTime);
//Let's try to validate the DSIG table in a TTC, if it exists
if (IsCollection())
{
if (m_ttch.version >= 0x00020000 && GetTableManager().GetUnaliasedTableName(m_ttch.DsigTag) == "DSIG")
{
MBOBuffer buf = this.ReadPaddedBuffer(m_ttch.DsigOffset, m_ttch.DsigLength);
OTTable table = GetTableManager().CreateTableObject(m_ttch.DsigTag, buf);
DirectoryEntry de = new DirectoryEntry();
de.tag = m_ttch.DsigTag;
de.offset = m_ttch.DsigOffset;
de.length = m_ttch.DsigLength;
OTFontVal fontOwner = new OTFontVal(this);
bRet &= ValidateTable(table, m_Validator, de, fontOwner);
}
else
{
m_Validator.Warning(T.T_NULL, W._FONT_W_MissingRecommendedTable, null, "DSIG");
}
}
m_Validator.OnFileValidationEvent(this, false);
if (m_Validator.CancelFlag)
{
m_Validator.ApplicationError(T.T_NULL, E._GEN_E_UserCanceled, null, "");
bRet = false;
}
return bRet;
}
public void OnBeginTableTest( DirectoryEntry de ){
}
/******************
* protected methods
*/
protected static OffsetTable ReadOffsetTable(OTFileVal file, uint filepos)
{
// read the Offset Table from the file
Validator v = file.GetValidator();
const int SIZEOF_OFFSETTABLE = 12;
OffsetTable ot = null;
// read the offset table
MBOBuffer buf = file.ReadPaddedBuffer(filepos, SIZEOF_OFFSETTABLE);
if (buf != null)
{
if (OTFile.IsValidSfntVersion(buf.GetUint(0)))
{
ot = new OffsetTable(buf);
}
else
{
v.Error(T.T_NULL, E._OFFSET_E_InvalidSFNT, null, "0x"+buf.GetUint(0).ToString("x8"));
}
}
// now read the directory entries
if (ot != null)
{
const int SIZEOF_DIRECTORYENTRY = 16;
for (int i=0; i<ot.numTables; i++)
{
uint dirFilePos = (uint)(filepos+SIZEOF_OFFSETTABLE+i*SIZEOF_DIRECTORYENTRY);
MBOBuffer DirEntBuf = file.ReadPaddedBuffer(dirFilePos, SIZEOF_DIRECTORYENTRY);
if (DirEntBuf != null)
{
DirectoryEntry de = new DirectoryEntry();
de.tag = new OTTag(DirEntBuf.GetBuffer());
de.checkSum = DirEntBuf.GetUint(4);
de.offset = DirEntBuf.GetUint(8);
de.length = DirEntBuf.GetUint(12);
ot.DirectoryEntries.Add(de);
if (de.offset > file.GetFileLength())
{
v.Error(T.T_NULL, E._DE_E_OffsetPastEOF, de.tag, "0x"+de.offset.ToString("x8"));
}
}
else
{
break;
}
}
}
return ot;
}
static byte[] get_TTC_digest( OTFile f )
{
TTCHeader ttc = f.GetTTCHeader();
uint back_shift = 12;
//if ( ttc.version == 0x00020000 )
back_shift = 0;
TTCHBuffer ttcb = new TTCHBuffer ( 12 + ttc.DirectoryCount * 4 + 12 - back_shift );
// write the TTC header
ttcb.FillUint32MBO((uint) ttc.TTCTag);
ttcb.FillUint32MBO(ttc.version);
ttcb.FillUint32MBO(ttc.DirectoryCount);
for (int i=0; i< f.GetNumFonts() ; i++)
{
ttcb.FillUint32MBO( (uint) ttc.DirectoryOffsets[i] - back_shift);
}
//if ( ttc.version == 0x00020000 )
{
ttcb.FillUint32MBO( 0 );
ttcb.FillUint32MBO( 0 );
ttcb.FillUint32MBO( 0 );
}
hash.TransformBlock ( ttcb.buffer, 0, ttcb.buffer.Length, ttcb.buffer, 0 );
// build an array of offset tables
OffsetTable[] otArr = new OffsetTable[f.GetNumFonts()];
for (uint iFont=0; iFont<f.GetNumFonts(); iFont++)
{
otArr[iFont] = new OffsetTable(new OTFixed(1,0), f.GetFont(iFont).GetNumTables());
for (ushort i=0; i<f.GetFont(iFont).GetNumTables(); i++) {
DirectoryEntry old = f.GetFont(iFont).GetDirectoryEntry(i);
DirectoryEntry de = new DirectoryEntry(old);
de.offset -= back_shift;
otArr[iFont].DirectoryEntries.Add(de);
}
}
if ( (uint) ttc.DirectoryOffsets[(int)f.GetNumFonts()-1] < f.GetFont(0).GetDirectoryEntry(0).offset )
{
// assume directory-contiguous
for (uint iFont=0; iFont<f.GetNumFonts(); iFont++)
{
// write the offset table
hash.TransformBlock (otArr[iFont].m_buf.GetBuffer(), 0, (int)otArr[iFont].m_buf.GetLength(),
otArr[iFont].m_buf.GetBuffer(), 0);
// write the directory entries
for (int i=0; i<f.GetFont(iFont).GetNumTables(); i++)
{
DirectoryEntry de = (DirectoryEntry)otArr[iFont].DirectoryEntries[i];
hash.TransformBlock (de.m_buf.GetBuffer(), 0, (int)de.m_buf.GetLength(),
de.m_buf.GetBuffer(), 0 );
}
}
}
// write out each font
uint PrevPos = 0;
for (uint iFont=0; iFont<f.GetNumFonts(); iFont++)
{
ushort numTables = f.GetFont(iFont).GetNumTables();
if ( (uint) ttc.DirectoryOffsets[(int)f.GetNumFonts()-1] > f.GetFont(0).GetDirectoryEntry(0).offset )
{
// assume font-contiguous
// write the offset table
hash.TransformBlock (otArr[iFont].m_buf.GetBuffer(), 0, (int)otArr[iFont].m_buf.GetLength(),
otArr[iFont].m_buf.GetBuffer(), 0 );
// write the directory entries
for (int i=0; i<numTables; i++)
{
DirectoryEntry de = (DirectoryEntry)otArr[iFont].DirectoryEntries[i];
hash.TransformBlock (de.m_buf.GetBuffer(), 0, (int)de.m_buf.GetLength(),
de.m_buf.GetBuffer(), 0 );
}
}
// 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 (PrevPos < de.offset) //crude
{
OTTable table = f.GetFont(iFont).GetTable(de.tag);
hash.TransformBlock (table.m_bufTable.GetBuffer(), 0, (int)table.GetBuffer().GetPaddedLength(),
table.m_bufTable.GetBuffer(), 0 );
PrevPos = de.offset;
}
}
}
byte[] usFlag = {0, 1};
hash.TransformFinalBlock(usFlag, 0,2);
return hash.Hash;
}
public void OnBeginTableTest( DirectoryEntry de )
{
UpdateLabelText( labelTestname, "" + de.tag );
UpdateLabelText( labelTestProgress, "" );
UpdateLabelVisible( labelTestProgress, false );
}
/// <summary>Add a new table to an non-file based table. Table cannot
/// already exist in the font.
/// </summary>
public void AddTable(OTTable t)
{
if (m_File != null)
{
throw new ApplicationException("attempted to add a table to a file-based OTFont object");
}
if (GetDirectoryEntry(t.m_tag) != null)
{
throw new ArgumentException("the specified table already exists in the font");
}
// build a new directory entry
DirectoryEntry de = new DirectoryEntry();
de.tag = new OTTag(t.m_tag.GetBytes());
de.checkSum = t.CalcChecksum();
de.offset = 0; // this value won't get fixed up until the font is written
de.length = t.GetLength();
// add the directory entry
m_OffsetTable.DirectoryEntries.Add(de);
m_OffsetTable.numTables++;
// add the table to the list of tables in memory
MemBasedTables.Add(t);
// special handling for certain tables
string sTable = (string)t.m_tag;
if (sTable == "CFF ")
{
m_OutlineType = OutlineType.OUTLINE_POSTSCRIPT;
}
else if (sTable == "glyf")
{
m_OutlineType = OutlineType.OUTLINE_TRUETYPE;
}
}
public DirectoryEntry(DirectoryEntry obj)
{
tag = new OTTag(obj.tag.GetBytes());
checkSum = obj.checkSum;
offset = obj.offset;
length = obj.length;
}
protected OTTable GetTable(DirectoryEntry de)
{
OTTable table = null;
if (m_File != null)
{
// get the table from OTFile's table manager
table = m_File.GetTableManager().GetTable(this, de);
}
else
{
// get the table from the list in memory
for (int i=0; i<MemBasedTables.Count; i++)
{
OTTable t = (OTTable)MemBasedTables[i];
if (de.tag == t.m_tag)
{
table = t;
break;
}
}
}
return table;
}
/// <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;
}
