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; }