TtfReader
Big-endian binary reader for SFNT / TrueType / OpenType tables.
All multi-byte fields in those formats are big-endian (network order), so we deliberately avoid the platform's NIO ByteBuffer (which is little-endian by default on x86 and not common-source available anyway).
Methods read at the current position and advance. Seeking is supported so the parser can jump to a table by offset.