Difference between revisions of "Advanced Detector"

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Advanced Detector (view source)

Revision as of 09:19, 10 December 2020

762 bytes removed ,  09:19, 10 December 2020
Update id info
(Replace AdvancedMetaEngine with AdvancedMetaEngineDetection)
(Update id info)
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description=Monkey Island 2: LeChuck's Revenge (DOS/English)
description=Monkey Island 2: LeChuck's Revenge (DOS/English)
path=/Users/sev/games/scumm/monkey2
path=/Users/sev/games/scumm/monkey2
engindid=scumm
gameid=monkey2
gameid=monkey2
language=en
language=en
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Name of each game is what we are calling '''target'''. Target, which is in the sample above specified as ''monkey2-vga'' is user-editable identifier unique to the specific user, and could be used for launching the game from command line.
Name of each game is what we are calling '''target'''. Target, which is in the sample above specified as ''monkey2-vga'' is user-editable identifier unique to the specific user, and could be used for launching the game from command line.


Then each entry has '''description''' which is also user-editable, '''path''' to the game, and '''gameid'''. '''gameid''' is a service name which identifies the game within whole ScummVM. There should be no clashes, and each engine knows which gameids it does support. First engine which finds a match for a given gameid will be used to run the game. This is why it is important to keep this ID unique, since there is no guarantee in sequence of engines which ScummVM probes when launching a game.
Then each entry has '''description''' which is also user-editable, '''path''' to the game, '''engineid''' and '''gameid'''. '''engineid''' is a service name which identifies the engine within whole ScummVM. There should be no clashes, and each engine knows which gameids it does support, so '''gameid''' is only unique to each engine.


Keys '''platform''' and '''language''' are used for narrowing down the possible game candidate but are fully optional.
Keys '''platform''' and '''language''' are used for narrowing down the possible game candidate but are fully optional.
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AD_ENTRY1("part01", "61d003202d301c29dd399acfb1354310"),
AD_ENTRY1("part01", "61d003202d301c29dd399acfb1354310"),
Common::EN_ANY,
Common::EN_ANY,
Common::kPlatformPC,
Common::kPlatformDOS,
ADGF_NO_FLAGS,
ADGF_NO_FLAGS,
GUIO0()
GUIO0()
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         {"simon1acorn", "simon1", Common::kPlatformAcorn},
         {"simon1acorn", "simon1", Common::kPlatformAcorn},
         {"simon1amiga", "simon1", Common::kPlatformAmiga},
         {"simon1amiga", "simon1", Common::kPlatformAmiga},
         {"simon2talkie", "simon2", Common::kPlatformPC},
         {"simon2talkie", "simon2", Common::kPlatformDOS},
         {"simon2mac", "simon2", Common::kPlatformMacintosh},
         {"simon2mac", "simon2", Common::kPlatformMacintosh},
         {"simon2win", "simon2", Common::kPlatformWindows},
         {"simon2win", "simon2", Common::kPlatformWindows},
Line 220: Line 221:


<syntaxhighlight lang="cpp">
<syntaxhighlight lang="cpp">
AdvancedMetaEngineDetection(const void *descs, uint descItemSize, const PlainGameDescriptor *gameids);
AdvancedMetaEngineDetection(const void *descs, uint descItemSize, const PlainGameDescriptor *gameIds);
</syntaxhighlight>
</syntaxhighlight>


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'''descItemSize''' is sizeof of the '''descs''' element used for iterating over it.
'''descItemSize''' is sizeof of the '''descs''' element used for iterating over it.


'''gameids''' must point to a list of ''PlainGameDescriptor'' structures defining supported gameids.
'''gameIds''' must point to a list of ''PlainGameDescriptor'' structures defining supported gameids.


== Additional Advanced MetaEngine parameters ==
== Additional Advanced MetaEngine parameters ==


'''_md5bytes''' -- number of bytes used to compute md5. If set to 0 then whole file will be used. Beware of doing this if your detection might encounter large files, since that can dramatically slow down the detection. Typically a sane value is 5000 bytes (the default), but often experimentation is required for many game variants with subtle differences.
'''_md5Bytes''' -- number of bytes used to compute md5. If set to 0 then whole file will be used. Beware of doing this if your detection might encounter large files, since that can dramatically slow down the detection. Typically a sane value is 5000 bytes (the default), but often experimentation is required for many game variants with subtle differences.
 
'''_singleid''' -- Used to override gameid. A recommended setting to prevent global gameid pollution. With this option set, the gameid effectively turns into engineid.
 
In the past we started to have clashes in game names, thus the option was introduced. Also it was mentioned that in the ideal world it should be enough to point just the game directory and ScummVM correctly detects and runs the game. This is a step towards this direction, however there are several cases when it is not possible to identify the game to run, particularly in those cases when there are more than single game stored in a directory.


'''_flags''' -- same as individual game flags but user for engine-wide settings. For instance, we know for sure that all games in the engine are unstable, so instead of modifying every game entry, we specify it here.
'''_flags''' -- same as individual game flags but user for engine-wide settings. For instance, we know for sure that all games in the engine are unstable, so instead of modifying every game entry, we specify it here.


'''_guioptions''' -- same as individual GUI options, but applied engine-wide. For example, when none of the games have speech, we may specify it in this spot.
'''_guiOptions''' -- same as individual GUI options, but applied engine-wide. For example, when none of the games have speech, we may specify it in this spot.


'''_maxScanDepth''' -- Maximum traversal depth for directories. Default is 1, that is do not go inside of subdirectories for detection.
'''_maxScanDepth''' -- Maximum traversal depth for directories. Default is 1, that is do not go inside of subdirectories for detection.
SupSuper
84

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