private int DecompressTable(MemoryStream output, BigEndianReader reader, WoffTableEntry table, uint length)
{
int pos = (int)output.Position;
using (var streamIn = new MemoryStream(reader.Read((int)table.CompressedLength)))
{
#if NET6_0
using (var compress = new System.IO.Compression.ZLibStream(streamIn, System.IO.Compression.CompressionMode.Decompress))
{
compress.CopyTo(output);
}
#else
using (InflaterInputStream decompressor = new InflaterInputStream(streamIn))
{
decompressor.CopyTo(output);
}
#endif
}
int len = (int)(output.Position - pos);
if (len != length)
{
return(-1);
}
else
{
return(len);
}
}
private static void Method_1(BigEndianReader param1, BigEndianReader param2)
{
int _loc3_ = param1.ReadInt32();
byte[] _loc4_ = new byte[_loc3_];
param1.Read(_loc4_, 0, _loc3_);
var _loc5_ = new Class_5(param2);
_loc5_.Method_5(_loc4_);
var reader = new BinaryReader(new MemoryStream(_loc4_));
byte[] readbytes = new byte[_loc4_.Length];
reader.Read(readbytes, 0, _loc4_.Length);
var_6.Add(Encoding.UTF8.GetString(readbytes));
}
protected override TrueTypeFontTable ReadTable(string tag, uint length, TrueTypeTableEntryList list, BigEndianReader reader)
{
var table = list[tag] as WoffTableEntry;
if (table.CompressedLength == table.Length)
{
//just copy the data
var pos = reader.Position;
var data = reader.Read((int)length);
table.SetDecompressedData(data);
//and return to the original
reader.Position = pos;
return(base.ReadTable(tag, length, list, reader));
}
if (table.DecompressedData == null)
{
using (var ms = new System.IO.MemoryStream())
{
DecompressTable(ms, reader, table, length);
table.SetDecompressedData(ms.ToArray());
ms.Position = 0;
using (var newReader = new BigEndianReader(ms))
{
var read = base.ReadTable(tag, length, list, newReader);
table.SetTable(read);
}
}
}
else
{
using (var ms = new System.IO.MemoryStream(table.DecompressedData))
{
using (var newReader = new BigEndianReader(ms))
{
var read = base.ReadTable(tag, length, list, newReader);
table.SetTable(read);
}
}
}
return(table.Table);
}
public static byte[] ExtractTTFfromTTC(System.IO.Stream ttc, int ttfHeadOffset)
{
using (System.IO.MemoryStream ttf = new System.IO.MemoryStream())
{
BigEndianReader reader = new BigEndianReader(ttc);
reader.Position = ttfHeadOffset;
TrueTypeHeader header;
if (TrueTypeHeader.TryReadHeader(reader, out header) == false)
{
throw new NotSupportedException("The current stream is not a supported OpenType or TrueType font file");
}
List <TrueTypeTableEntry> dirs;
try
{
dirs = new List <TrueTypeTableEntry>();
for (int i = 0; i < header.NumberOfTables; i++)
{
TrueTypeTableEntry dir = new TrueTypeTableEntry();
dir.Read(reader);
dirs.Add(dir);
}
}
catch (TypefaceReadException) { throw; }
catch (Exception ex) { throw new TypefaceReadException("Could not read the TTF File", ex); }
BigEndianWriter writer = new BigEndianWriter(ttf);
writer.Write(header.Version.HeaderData);
writer.WriteUInt16((ushort)header.NumberOfTables);
writer.WriteUInt16((ushort)header.SearchRange);
writer.WriteUInt16((ushort)header.EntrySelector);
writer.WriteUInt16((ushort)header.RangeShift);
long[] dirOffsets = new long[dirs.Count]; //Set to the byte position of the Offset32 in the header to point to the table
long[] tableOffsets = new long[dirs.Count]; //Set to the byte position of the table in the file
for (var i = 0; i < dirs.Count; i++)
{
var dir = dirs[i];
writer.WriteASCIIChars(dir.Tag);
writer.WriteUInt32(dir.CheckSum);
//Write zero as the offset initially and then we will come back and update
dirOffsets[i] = writer.Position;
writer.WriteUInt32(0);
writer.WriteUInt32(dir.Length);
}
for (var i = 0; i < dirs.Count; i++)
{
var dir = dirs[i];
while (writer.Position % 4 != 0)
{
writer.WriteByte(Zero);
}
//Remember the start position of the table
tableOffsets[i] = writer.Position;
reader.Position = dir.Offset;
//we can improve this
var data = reader.Read((int)dir.Length);
writer.Write(data);
}
for (int i = 0; i < dirs.Count; i++)
{
writer.Position = dirOffsets[i];
writer.WriteUInt32((uint)tableOffsets[i]);
}
writer.Position = 0;
var fileData = ttf.ToArray();
return(fileData);
}
}
private TrueTypeFontTable ReadOS2Table(uint length, TrueTypeTableEntryList list, BigEndianReader reader)
{
OS2Table os2 = new OS2Table(reader.Position);
os2.Version = (OS2TableVersion)reader.ReadUInt16();
os2.XAverageCharWidth = reader.ReadInt16();
os2.WeightClass = (WeightClass)reader.ReadUInt16();
os2.WidthClass = (WidthClass)reader.ReadUInt16();
os2.FSType = (FontRestrictions)reader.ReadUInt16();
os2.SubscriptXSize = reader.ReadInt16();
os2.SubscriptYSize = reader.ReadInt16();
os2.SubscriptXOffset = reader.ReadInt16();
os2.SubscriptYOffset = reader.ReadInt16();
os2.SuperScriptXSize = reader.ReadInt16();
os2.SuperScriptYSize = reader.ReadInt16();
os2.SuperscriptXOffset = reader.ReadInt16();
os2.SuperscriptYOffset = reader.ReadInt16();
os2.StrikeoutSize = reader.ReadInt16();
os2.StrikeoutPosition = reader.ReadInt16();
byte hi = reader.ReadByte();
byte lo = reader.ReadByte();
os2.FamilyClass = new IBMFontClass(hi, lo);
byte[] data = reader.Read(10);
os2.Panose = new PanoseArray(data);
uint zero = reader.ReadUInt32();
uint one = reader.ReadUInt32();
uint two = reader.ReadUInt32();
uint three = reader.ReadUInt32();
os2.UnicodeRanges = new UnicodeRanges(zero, one, two, three);
os2.VendorID = reader.ReadString(4);
os2.Selection = (FontSelection)reader.ReadUInt16();
os2.FirstCharIndex = reader.ReadUInt16();
os2.LastCharIndex = reader.ReadUInt16();
os2.TypoAscender = reader.ReadInt16();
os2.TypoDescender = reader.ReadInt16();
os2.TypoLineGap = reader.ReadInt16();
os2.WinAscent = reader.ReadUInt16();
os2.WinDescent = reader.ReadUInt16();
if (os2.Version >= OS2TableVersion.TrueType166)
{
zero = reader.ReadUInt32();
one = reader.ReadUInt32();
os2.CodePageRanges = new CodePageRange(zero, one);
if (os2.Version >= OS2TableVersion.OpenType12)
{
os2.Height = reader.ReadInt16();
os2.CapHeight = reader.ReadInt16();
os2.DefaultChar = reader.ReadUInt16();
os2.BreakChar = reader.ReadUInt16();
os2.MaxContext = reader.ReadUInt16();
}
}
return(os2);
}
public void Transform(BigEndianReader reader)
{
//the glyf table is split into several substreams, to group like data together.
//The transformed table consists of a number of fields specifying the size of each of the substreams,
//followed by the substreams in sequence.
//During the decoding process the reverse transformation takes place,
//where data from various separate substreams are recombined to create a complete glyph record
//for each entry of the original glyf table.
//Transformed glyf Table
//Data-Type Semantic Description and value type(if applicable)
//Fixed version = 0x00000000
//UInt16 numGlyphs Number of glyphs
//UInt16 indexFormatOffset format for loca table,
// should be consistent with indexToLocFormat of
// the original head table(see[OFF] specification)
//UInt32 nContourStreamSize Size of nContour stream in bytes
//UInt32 nPointsStreamSize Size of nPoints stream in bytes
//UInt32 flagStreamSize Size of flag stream in bytes
//UInt32 glyphStreamSize Size of glyph stream in bytes(a stream of variable-length encoded values, see description below)
//UInt32 compositeStreamSize Size of composite stream in bytes(a stream of variable-length encoded values, see description below)
//UInt32 bboxStreamSize Size of bbox data in bytes representing combined length of bboxBitmap(a packed bit array) and bboxStream(a stream of Int16 values)
//UInt32 instructionStreamSize Size of instruction stream(a stream of UInt8 values)
//Int16 nContourStream[] Stream of Int16 values representing number of contours for each glyph record
//255UInt16 nPointsStream[] Stream of values representing number of outline points for each contour in glyph records
//UInt8 flagStream[] Stream of UInt8 values representing flag values for each outline point.
//Vary glyphStream[] Stream of bytes representing point coordinate values using variable length encoding format(defined in subclause 5.2)
//Vary compositeStream[] Stream of bytes representing component flag values and associated composite glyph data
//UInt8 bboxBitmap[] Bitmap(a numGlyphs-long bit array) indicating explicit bounding boxes
//Int16 bboxStream[] Stream of Int16 values representing glyph bounding box data
//UInt8 instructionStream[] Stream of UInt8 values representing a set of instructions for each corresponding glyph
uint version = reader.ReadUInt32();
ushort numGlyphs = reader.ReadUInt16();
ushort indexFormatOffset = reader.ReadUInt16();
uint nContourStreamSize = reader.ReadUInt32(); //in bytes
uint nPointsStreamSize = reader.ReadUInt32(); //in bytes
uint flagStreamSize = reader.ReadUInt32(); //in bytes
uint glyphStreamSize = reader.ReadUInt32(); //in bytes
uint compositeStreamSize = reader.ReadUInt32(); //in bytes
uint bboxStreamSize = reader.ReadUInt32(); //in bytes
uint instructionStreamSize = reader.ReadUInt32(); //in bytes
long expected_nCountStartAt = reader.BaseStream.Position;
long expected_nPointStartAt = expected_nCountStartAt + nContourStreamSize;
long expected_FlagStreamStartAt = expected_nPointStartAt + nPointsStreamSize;
long expected_GlyphStreamStartAt = expected_FlagStreamStartAt + flagStreamSize;
long expected_CompositeStreamStartAt = expected_GlyphStreamStartAt + glyphStreamSize;
long expected_BboxStreamStartAt = expected_CompositeStreamStartAt + compositeStreamSize;
long expected_InstructionStreamStartAt = expected_BboxStreamStartAt + bboxStreamSize;
long expected_EndAt = expected_InstructionStreamStartAt + instructionStreamSize;
Glyph[] glyphs = new Glyph[numGlyphs];
TempGlyph[] allGlyphs = new TempGlyph[numGlyphs];
List <ushort> compositeGlyphs = new List <ushort>();
int contourCount = 0;
for (ushort i = 0; i < numGlyphs; ++i)
{
short numContour = reader.ReadInt16();
allGlyphs[i] = new TempGlyph(i, numContour);
if (numContour > 0)
{
contourCount += numContour;
//>0 => simple glyph
//-1 = compound
//0 = empty glyph
}
else if (numContour < 0)
{
//composite glyph, resolve later
compositeGlyphs.Add(i);
}
else
{
}
}
ushort[] pntPerContours = new ushort[contourCount];
for (int i = 0; i < contourCount; ++i)
{
// Each of these is the number of points of that contour.
pntPerContours[i] = reader.Read255UInt16();
}
byte[] flagStream = reader.Read((int)flagStreamSize);
//TODO: Read more from line 296 in OpenFoint.Woff2Reader
using (var composites = new MemoryStream())
{
reader.Position = expected_CompositeStreamStartAt;
var compositeData = reader.Read((int)compositeStreamSize);
composites.Write(compositeData, 0, (int)compositeStreamSize);
int compositeGlyphCount = compositeGlyphs.Count;
using (var compositeReader = new BigEndianReader(composites))
{
for (int i = 0; i < compositeGlyphCount; i++)
{
ushort compositeGlyphIndex = compositeGlyphs[i];
bool hasInstructions = CompositeHasInstructions(compositeReader, compositeGlyphIndex);
if (hasInstructions)
{
break;
}
allGlyphs[compositeGlyphIndex].compositeHasInstructions = hasInstructions;
}
}
}
}
private Woff2CacheData ReadCachableDataAfterVersion(BigEndianReader reader, string source)
{
Woff2CacheData cache = null;
Woff2Header header = Woff2Header.ReadHeader(this, reader);
Woff2TableEntryList list = new Woff2TableEntryList();
uint startAt = (uint)reader.Position;
uint offset = 0;
bool hasOs2 = false;
bool hasFHead = false;
bool hasName = false;
for (var i = 0; i < header.NumberOfTables; i++)
{
Woff2TableEntry entry = new Woff2TableEntry(offset);
entry.Read(reader);
if (entry.Tag == TrueTypeTableNames.WindowsMetrics)
{
hasOs2 = true;
}
else if (entry.Tag == TrueTypeTableNames.FontHeader)
{
hasFHead = true;
}
else if (entry.Tag == TrueTypeTableNames.NamingTable)
{
hasName = true;
}
// If the table data has been transformed,
// then that will be the offset of the next table
if (entry.HasTransformation)
{
offset += entry.TransformedLength;
}
else
{
offset += entry.Length;
}
list.Add(entry);
}
if (!(hasOs2 || hasName))
{
return(null);// new Utility.UnknownTypefaceInfo(source, "Not all the required tables (head with OS/2 or name) were found in the font file");
}
if (!hasFHead)
{
return(null);// new Utility.UnknownTypefaceInfo(source, "Not all the required tables (head with OS/2 or name) were found in the font file");
}
//After the table entries, the entire table data is compressed using the Brotli alogorythm
offset = (uint)reader.Position;
var compressedData = reader.Read((int)header.TotalCompressedSize);
var decompressedData = Woff2Brotli.DecompressData(compressedData);
using (var uncompressed = new MemoryStream(decompressedData))
{
#if RANGE_CHECK
if (uncompressed.Length + offset != header.TotalFontSize)
{
throw new ArgumentOutOfRangeException("The header uncompressed size is not the same");
}
#endif
using (var newReader = new BigEndianReader(uncompressed))
{
var info = ReadInfoFromTables(list, newReader, source, hasOs2);
if (null != info && info.FontCount > 0)
{
cache = new Woff2CacheData()
{
Entries = list,
Header = header,
Info = info,
Source = source,
UncompressedData = decompressedData
};
}
}
}
return(cache);
}
