This version (2017/04/15 15:45) was approved by stohrendorf.The Previously approved version (2017/01/25 12:42) is available.

PAK file format (TR4-TR5)

Overview

TR4 and TR5 use a file format with the extension PAK for certain files (mostly pictures). This file format is actually a container for raw binary content, compressed using zlib.

Layout

struct pak_file
{
    uint32_t UncompressedSize; // Uncompressed size of data (4 bytes)
    uint8_t CompressedData[]; // zlib-compressed data (read until EOF)
}

The UncompressedSize field is used by the game to allocate the buffer for uncompressed data. Do not put a wrong value here, or it’ll result in unexpected and wrong behaviour.

trs/pak.txt · Last modified: 2017/02/02 19:56 by stohrendorf

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Table of Contents

PAK file format (TR4-TR5)

Overview

Layout