SCI0: SCI0 Interpreter with added PKWare DCL Implode compression (comp_method=3)

[robbo007]

Hi guys,
On my quest to save hard disk space for my project after many hours of pulling my hair out I've managed to get a working version of the SCI0 Interpreter with added PKWare DCL Implode compression (comp_method=3) and only using a 6kb of memory footprint. Maybe someone else could do this better using less memory?

### Memory footprint (decompressor in SCIV.EXE)

4096-byte dictionary window : 4096 bytes
Fixed decode tables         : ~1800 bytes (compile-time constants)
State overhead              :  ~200 bytes
TOTAL                       : ~6096 bytes (~6KB)

I've also written a makevols.exe that compresses each resource with DCL Implode. Both are attached if anyone wants to test them.

[lskovlun]

How much of this memory footprint is in heap, and how much is in hunk?

[Kawa]

How much of this memory footprint is in heap, and how much is in hunk?

I don't think I understand the question. The decompressor is not itself a resource, and once uncompressed for use the resources are as big as always. Right?

[lskovlun]

How much of this memory footprint is in heap, and how much is in hunk?

I don't think I understand the question. The decompressor is not itself a resource, and once uncompressed for use the resources are as big as always. Right?

The buffers can be allocated near (= in the data segment, preventing that space from being used for the heap) or far (= hunk).

[robbo007]

Hi guys,
The patch costs the game zero heap and about 6KB of hunk, which matches how Sierra's own SCI16 engine handles this (it keeps the whole DCL work buffer in a far hunk Handle with zero near-heap use).
Hope that helps.