Scumm 8 data format - RalfGuder/scummc GitHub Wiki

1. Introduction

I'm continuing my work by exploring the version 8 of scumm. It's the last version of scumm. For later games lucasart moved to a lua based engine. The format is quiet similar to v6, just cleaner :)

2. Index file

We'll see that later.

3. Main data file

3.1 Structure

Currently this is under contruction so most stuff is copied from v6, it may vary more than expected.

  • LECF main container
    • LOFF room offset table
    • LFLF disk block
      • ROOM room block
        • RMHD room header
        • CYCL color cycle (vlc stop on 0x00)
        • PALS palette data
          • WRAP dummy container
            • OFFS palette index
            • APAL ??? entries rgb palette (include the others blocks size)
        • IMAG image block
          • WRAP
            • OFFS offset block
            • SMAP image data
              • BSTR
                • WRAP
                  • OFFS
                  • DATA ????
              • ZPLN
                • OFFS
                • DATA ????
            • BOMP image data, alternative to SMAP
        • OBIM object image
          • IMHD object image header
          • IMAG
        • BOXD box data
        • BOXM box matrix
        • SCAL scale data
      • RMSC room scripts
        • ENCD entry script
        • EXCD exit script
        • LSCR local script
        • OBCD object code
          • CDHD code header
          • OBNA object default name
          • VERB verb scripts
      • SCRP script
      • SOUN sound
        • iMUS
          • MAP
            • FRMT
            • REGN
            • STOP
          • DATA
      • AKOS costume
        • AKHD
        • AKPL
        • RGBS
        • AKSQ
        • AKCH
        • AKOF
        • AKCI
        • AKCD

3.2 Blocks content

3.2.1 LOFF

Same as in v6.

3.2.2 RMHD

  version  : 32le
  width    : 32le
  height   : 32le
  num objs : 32le
  num zbuf : 32le
  unk      : 32

3.2.3 CYCL

3.2.4 OFFS

3.2.5 APAL

Most probably like in v6.

3.2.6 SMAP

These seems different from v6.

3.2.7 BOMP

A new image format to be investigated, see Scumm image formats for more informations.

3.2.8 IMHD

  name        : 0x40 bytes
  version     : 32le
  num image   : 32le
  x pos       : 32le
  y pos       : 32le
  width       : 32le
  height      : 32le
  unk         : 32le*2
  hotspots    : ??? as many as plane
    hotspot x : s32le
    hotspot y : s32le

3.2.9 BOXD

  num box : 32le
    ulx   : s32le
    uly   : s32le
    urx   : s32le
    ury   : s32le
    lrx   : s32le
    lry   : s32le
    llx   : s32le
    lly   : s32le
    unk   : 32le*5

3.2.10 BOXM

Probably like in v6.

3.2.11 SCAL

Nothing know.

3.2.12 CDHD

  unk1 : 32le
  unk2 : 32le