public static byte[] ReadProgram(BinaryReader reader, TableRecord[] tables, FourCC tag)
{
var index = FindTable(tables, tag);
if (index == -1)
{
return(null);
}
reader.Seek(tables[index].Offset);
return(reader.ReadBytes((int)tables[index].Length));
}
public static int FindTable(TableRecord[] tables, FourCC tag)
{
var index = -1;
for (int i = 0; i < tables.Length; i++)
{
if (tables[i].Tag == tag)
{
index = i;
break;
}
}
return(index);
}
public static bool SeekToTable(BinaryReader reader, TableRecord[] tables, FourCC tag, bool required = false)
{
// check if we have the desired table and that it's not empty
var index = FindTable(tables, tag);
if (index == -1 || tables[index].Length == 0)
{
if (required)
{
throw new InvalidFontException($"Missing or empty '{tag}' table.");
}
return(false);
}
// seek to the appropriate offset
reader.Seek(tables[index].Offset);
return(true);
}