Save games created by earlier versions of ScummVM are prone to
having subtle graphics problems or other corruption caused by
incomplete save/load code.
The original interpreter created subdirectories for each in-game
profile, but copying this behaviour would add a lot of
superfluous complexity to the save game system in ScummVM, and
may not be portable to all supported platforms. Instead, when the
game tries to save its files to a subdirectory, the backslash in
the file name is replaced with an underscore so it can be created
successfully on filesystems where backslash is an illegal file
name character.
This has a side-effect of causing all save games to be displayed
under all profiles, instead of just the ones "belonging" to a
particular profile, but this seems like a reasonable trade-off
given that there is no reason to play this game with more than one
profile.
In SSCI, all files opened through kFileIO are writable. Most of
the time this does not matter and the engine can get away with
using read-only streams, but when chase.dat is opened by Phant1
from the retry dialogue during the chase, it needs to be writable
because game code puts a '98' marker in the chase data. If this
write does not occur, the game gets stuck in a loop looking for
the marker.
Memory references and integers in SSCI are both 16-bit numbers,
so game scripts frequently (incorrectly) use an IntArray instead
of an IDArray for holding references. Since references in ScummVM
are 32-bit reg_ts, IntArray entries must be large enough to hold
reg_ts in order to be compatible with game scripts that store
references in integer arrays.
The alternative solution is to find and patch all incorrect use of
IntArray across all games. This is possible, but a bit risky from
a save game stability perspective, since incorrect IntArray usage
is sometimes not apparent until well after the array is
instantiated (like GK1's global interview array).
This change invalidates existing SCI32 save games.
1. Shift save numbers up/down for game scripts that rely on save
game numbers starting from 0 to work correctly
2. Add fake file operations to support KQ7 save games
3. Hide autosave games from native save/load list to match SSCI.
This change invalidates earlier SCI32 save games, which separated
arrays and strings in an incompatible manner. Old save games
contain invalid references to a string segment which no longer
exists, and contain incompatible array structures that lack
critical type information.
Torin has two sets of saves: autosave.### and torinsg.###, both with
their own slots and .cat file. The autosave system uses autosave.000
and autosave.001. It also checks the presence of autosave.cat to
determine if it should show the chapter selection menu on startup.
At least Phantasmagoria and PQ:SWAT require this.
This adds a ReadStream/WriteStream to support this. It replaces
the previous VirtualIndexFile which required reimplementation of
most read/write functions.
Script patch to change the fixed slot 999 to fixed slot 99 in the
game scripts and additional code for kSaveGame, that checks for
Cascade Quest + slot 99 and will then use ScummVM slot 0, which
is our auto-save slot.
Fixes bug #7007
Also added the game name to the other fan-made script patch.
Game checks for file CDAUDIO. Currently the kFileIO(Exists)
code is working pretty slowly on at least Windows. Needs to get
fixed properly by enhancing SaveFileManager().
This is primarily for branch 1.8.0.
+ Mother Goose SCI1.1
Fixes graphic issues when restoring from GMM
Also make the fix ups for Mixed Up Mother Goose, Jones + PQ2
get applied all the time (debugger command not included)
Auto-saving is not used by SCI, but slot 0 is ScummVM "standard"
for auto-saving, that's why it's not available for saving anymore.
Jones still uses slot 0 for saving/restoring (because it's
hardcoded and changing it would break it somewhat)
Deleting + restoring is still possible of couse.
The old code expected sciAudio FOpen calls to fail, because they
contained a directory name. On AmigaOS those calls succeeded.
Because of that at least on AmigaOS, sciAudio support didn't
work at all.
We now detect sciAudio FOpen calls and return a proper virtual file
handle. This should fix it on all platforms.
Also moved the SCI32 virtual save file handle from 200 to 32100.
This uses the same hack as the one used to reset the menus in Jones.
I've tested some more SCI games, and they don't disable menu entries
when loading a game. Hopefully, Jones and PQ2 are the only ones
The code path that is supposed to enable these never gets called when
restoring from the main menu, or from the ScummVM launcher. Since the
logic on when and what to enable is quite complex, the easiest thing
to do is enable these entries manually after a game is loaded.
Colin Snover
Willem Jan Palenstijn
D G Turner
Filippos Karapetis
Martin Kiewitz
Johannes Schickel
Strangerke