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GFCP is a container for compression.

File Format[edit]


Offset Size Type Description
0x00 4 char[4] Magic Word 'GFCP'
0x04 4 uint32 Always 1
0x08 4 uint32 Compression type/algorithm which was used to compress the data
0x0C 4 uint32 Raw/Uncompressed data size
0x10 4 uint32 Compressed data size

The remaining data is the compressed data. It should have the same size as stated in the Compressed data size field of the header.


ID Algorithm
1 byte pair encoding
2 LZ77
3 LZ77 Version 0x10 but without header