/// <summary>
/// Creates <see cref="TtfFileInfo"/> from <see cref="System.IO.Stream"/>.
/// </summary>
/// <param name="stream">Stream to create the structure. Stream will be disposed after use.</param>
/// <returns><see cref="TtfFileInfo"/> if successful, otherwise null.</returns>
public static TtfFileInfo FromStream(Stream stream)
{
try
{
using (var reader = new BigEndianReader(stream))
{
var ttfFile = new TtfFileInfo()
{
Version = reader.ReadInt32()
};
if (ttfFile.Version != 0x74727565 && ttfFile.Version != 0x00010000) return null;
ttfFile.TableCount = reader.ReadInt16();
reader.BaseStream.Seek(6, SeekOrigin.Current);
for (var tableIndex = 0; tableIndex < ttfFile.TableCount; tableIndex++)
{
var tag = reader.ReadInt32();
reader.BaseStream.Seek(4, SeekOrigin.Current);
var offset = reader.ReadInt32();
var length = reader.ReadInt32();
if (tag != 0x6E616D65) continue;
reader.BaseStream.Seek(offset, SeekOrigin.Begin);
var table = reader.ReadBytes(length);
var count = GetInt16(table, 2);
var stringOffset = GetInt16(table, 4);
for (var record = 0; record < count; record++)
{
var nameidOffset = record*12 + 6;
var platformId = GetInt16(table, nameidOffset);
var nameidValue = GetInt16(table, nameidOffset + 6);
if (nameidValue != 4 || platformId != 1) continue;
var nameLength = GetInt16(table, nameidOffset + 8);
var nameOffset = stringOffset + GetInt16(table, nameidOffset + 10);
if (nameOffset < 0 || nameOffset + nameLength >= table.Length) continue;
ttfFile.FontName = Encoding.UTF8.GetString(table, nameOffset, nameLength);
return ttfFile;
}
}
}
}
catch
{
return null;
}
return null;
}
/// <summary>
/// Creates <see cref="TtfFileInfo"/> from <see cref="System.IO.Stream"/>.
/// </summary>
/// <param name="stream">Stream to create the structure. Stream will be disposed after use.</param>
/// <returns><see cref="TtfFileInfo"/> if successful, otherwise null.</returns>
public static TtfFileInfo FromStream(Stream stream)
{
try
{
using (var reader = new BigEndianReader(stream))
{
var ttfFile = new TtfFileInfo()
{
Version = reader.ReadInt32()
};
if (ttfFile.Version != 0x74727565 && ttfFile.Version != 0x00010000)
{
return(null);
}
ttfFile.TableCount = reader.ReadInt16();
reader.BaseStream.Seek(6, SeekOrigin.Current);
for (var tableIndex = 0; tableIndex < ttfFile.TableCount; tableIndex++)
{
var tag = reader.ReadInt32();
reader.BaseStream.Seek(4, SeekOrigin.Current);
var offset = reader.ReadInt32();
var length = reader.ReadInt32();
if (tag != 0x6E616D65)
{
continue;
}
reader.BaseStream.Seek(offset, SeekOrigin.Begin);
var table = reader.ReadBytes(length);
var count = GetInt16(table, 2);
var stringOffset = GetInt16(table, 4);
for (var record = 0; record < count; record++)
{
var nameidOffset = record * 12 + 6;
var platformId = GetInt16(table, nameidOffset);
var nameidValue = GetInt16(table, nameidOffset + 6);
if (nameidValue != 4 || platformId != 1)
{
continue;
}
var nameLength = GetInt16(table, nameidOffset + 8);
var nameOffset = stringOffset + GetInt16(table, nameidOffset + 10);
if (nameOffset < 0 || nameOffset + nameLength >= table.Length)
{
continue;
}
ttfFile.FontName = Encoding.UTF8.GetString(table, nameOffset, nameLength);
return(ttfFile);
}
}
}
}
catch
{
return(null);
}
return(null);
}
