Scumm 8 data format

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