thirdparty/scummvm
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GRIM: Add support for parsing MI4 lab files

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Matthew Hoops 2011-03-24 22:57:35 +08:00 • committed by Pawel Kolodziejski
parent 4e2781c41e
commit d00bbceb34
4 changed files with 56 additions and 17 deletions
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2
engines/grim/detection.cpp
View file

@ -126,7 +126,7 @@ static const GrimGameDescription gameDescriptions[] = {
GUIO_NONE GUIO_NONE
}, },
GF_DEMO, GF_DEMO,
GType_GRIM GType_MONKEY4
}, },

64
engines/grim/lab.cpp
View file

@ -26,6 +26,7 @@
#include "common/endian.h" #include "common/endian.h"
#include "common/file.h" #include "common/file.h"
#include "engines/grim/grim.h"
#include "engines/grim/lab.h" #include "engines/grim/lab.h"
#include "engines/grim/lua/lua.h" #include "engines/grim/lua/lua.h"
@ -40,28 +41,37 @@ bool Lab::open(const Common::String &filename) {
if (!_f->open(filename)) if (!_f->open(filename))
return false; return false;
char header[16]; if (_f->readUint32BE() != MKID_BE('LABN')) {
_f->read(header, sizeof(header));
if (READ_BE_UINT32(header) != MKID_BE('LABN')) {
close(); close();
return false; return false;
} }
uint32 entryCount = READ_LE_UINT32(header + 8); _f->readUint32LE(); // version
int string_table_size = READ_LE_UINT32(header + 12); if (g_grim->getGameType() == GType_GRIM)
char *string_table = new char[string_table_size]; parseGrimFileTable();
else
parseMonkey4FileTable();
return true;
}
void Lab::parseGrimFileTable() {
uint32 entryCount = _f->readUint32LE();
uint32 stringTableSize = _f->readUint32LE();
char *stringTable = new char[stringTableSize];
_f->seek(16 * (entryCount + 1)); _f->seek(16 * (entryCount + 1));
_f->read(string_table, string_table_size); _f->read(stringTable, stringTableSize);
_f->seek(16); _f->seek(16);
for (uint32 i = 0; i < entryCount; i++) { for (uint32 i = 0; i < entryCount; i++) {
int fname_offset = _f->readUint32LE(); int fnameOffset = _f->readUint32LE();
int start = _f->readUint32LE(); int start = _f->readUint32LE();
int size = _f->readUint32LE(); int size = _f->readUint32LE();
_f->readUint32LE(); _f->readUint32LE();
Common::String fname = string_table + fname_offset; Common::String fname = stringTable + fnameOffset;
LabEntry entry; LabEntry entry;
entry.offset = start; entry.offset = start;
@ -70,8 +80,40 @@ bool Lab::open(const Common::String &filename) {
_entries[fname] = entry; _entries[fname] = entry;
} }
delete[] string_table; delete[] stringTable;
return true; }
void Lab::parseMonkey4FileTable() {
uint32 entryCount = _f->readUint32LE();
uint32 stringTableSize = _f->readUint32LE();
uint32 stringTableOffset = _f->readUint32LE() - 0x13d0f;
char *stringTable = new char[stringTableSize];
_f->seek(stringTableOffset);
_f->read(stringTable, stringTableSize);
_f->seek(20);
// Decrypt the string table
for (uint32 i = 0; i < stringTableSize; i++)
if (stringTable[i] != 0)
stringTable[i] ^= 0x96;
for (uint32 i = 0; i < entryCount; i++) {
int fnameOffset = _f->readUint32LE();
int start = _f->readUint32LE();
int size = _f->readUint32LE();
_f->readUint32LE();
Common::String fname = stringTable + fnameOffset;
LabEntry entry;
entry.offset = start;
entry.len = size;
_entries[fname] = entry;
}
delete[] stringTable;
} }
bool Lab::fileExists(const Common::String &filename) const { bool Lab::fileExists(const Common::String &filename) const {

2
engines/grim/lab.h
View file

@ -72,6 +72,8 @@ public:
}; };
private: private:
void parseGrimFileTable();
void parseMonkey4FileTable();
Common::File *_f; Common::File *_f;
typedef Common::HashMap<Common::String, LabEntry, Common::IgnoreCase_Hash, Common::IgnoreCase_EqualTo> LabMap; typedef Common::HashMap<Common::String, LabEntry, Common::IgnoreCase_Hash, Common::IgnoreCase_EqualTo> LabMap;

5
engines/grim/resource.cpp
View file

@ -43,11 +43,6 @@ ResourceLoader::ResourceLoader() {
_cacheDirty = false; _cacheDirty = false;
_cacheMemorySize = 0; _cacheMemorySize = 0;
// We don't support MI4's LAB format yet
// It's been slightly modified and the strings have been XOR encrypted
if (g_grim->getGameType() == GType_MONKEY4)
return;
Lab *l; Lab *l;
Common::ArchiveMemberList files; Common::ArchiveMemberList files;