void ResourceManager::readCluIndex(uint16 fileNum, Common::File *file) {
if (_resFiles[fileNum].entryTab == NULL) {
// we didn't read from this file before, get its index table
if (file == NULL)
file = openCluFile(fileNum);
else
file->incRef();
// 1st DWORD of a cluster is an offset to the look-up table
uint32 table_offset = file->readUint32LE();
debug(6, "table offset = %d", table_offset);
uint32 tableSize = file->size() - table_offset; // the table is stored at the end of the file
file->seek(table_offset);
assert((tableSize % 8) == 0);
_resFiles[fileNum].entryTab = (uint32*)malloc(tableSize);
_resFiles[fileNum].numEntries = tableSize / 8;
file->read(_resFiles[fileNum].entryTab, tableSize);
if (file->ioFailed())
error("unable to read index table from file %s\n", _resFiles[fileNum].fileName);
#ifdef SCUMM_BIG_ENDIAN
for (int tabCnt = 0; tabCnt < _resFiles[fileNum].numEntries * 2; tabCnt++)
_resFiles[fileNum].entryTab[tabCnt] = FROM_LE_32(_resFiles[fileNum].entryTab[tabCnt]);
#endif
file->decRef();
}
}
uint32 ResourceManager::fetchLen(uint32 res) {
if (_resList[res].ptr)
return _resList[res].size;
// Does this ever happen?
warning("fetchLen: Resource %u is not loaded; reading length from file", res);
// Points to the number of the ascii filename
uint16 parent_res_file = _resConvTable[res * 2];
// relative resource within the file
uint16 actual_res = _resConvTable[(res * 2) + 1];
// first we have to find the file via the _resConvTable
// open the cluster file
if (_resFiles[parent_res_file].entryTab == NULL) {
Common::File *file = openCluFile(parent_res_file);
readCluIndex(parent_res_file, file);
delete file;
}
return _resFiles[parent_res_file].entryTab[actual_res * 2 + 1];
}
/**
* Returns the address of a resource. Loads if not in memory. Retains a count.
*/
byte *ResourceManager::openResource(uint32 res, bool dump) {
assert(res < _totalResFiles);
// FIXME: In PSX edition, not all top menu icons are present (TOP menu is not used).
// Though, at present state, the engine still ask for the resources.
if (Sword2Engine::isPsx()) { // We need to "rewire" missing icons
if (res == 342) res = 364; // Rewire RESTORE ICON to SAVE ICON
}
// Is the resource in memory already? If not, load it.
if (!_resList[res].ptr) {
// Fetch the correct file and read in the correct portion.
uint16 cluFileNum = _resConvTable[res * 2]; // points to the number of the ascii filename
assert(cluFileNum != 0xffff);
// Relative resource within the file
// First we have to find the file via the _resConvTable
uint16 actual_res = _resConvTable[(res * 2) + 1];
debug(5, "openResource %s res %d", _resFiles[cluFileNum].fileName, res);
// If we're loading a cluster that's only available from one
// of the CDs, remember which one so that we can play the
// correct speech and music.
if (Sword2Engine::isPsx()) // We have only one disk in PSX version
setCD(CD1);
else
setCD(_resFiles[cluFileNum].cd);
// Actually, as long as the file can be found we don't really
// care which CD it's on. But if we can't find it, keep asking
// for the CD until we do.
Common::File *file = openCluFile(cluFileNum);
if (_resFiles[cluFileNum].entryTab == NULL) {
// we didn't read from this file before, get its index table
readCluIndex(cluFileNum, file);
}
assert(_resFiles[cluFileNum].entryTab);
uint32 pos = _resFiles[cluFileNum].entryTab[actual_res * 2 + 0];
uint32 len = _resFiles[cluFileNum].entryTab[actual_res * 2 + 1];
file->seek(pos, SEEK_SET);
debug(6, "res len %d", len);
// Ok, we know the length so try and allocate the memory.
_resList[res].ptr = _vm->_memory->memAlloc(len, res);
_resList[res].size = len;
_resList[res].refCount = 0;
file->read(_resList[res].ptr, len);
debug(3, "Loaded resource '%s' (%d) from '%s' on CD %d (%d)", fetchName(_resList[res].ptr), res, _resFiles[cluFileNum].fileName, getCD(), _resFiles[cluFileNum].cd);
if (dump) {
char buf[256];
const char *tag;
switch (fetchType(_resList[res].ptr)) {
case ANIMATION_FILE:
tag = "anim";
break;
case SCREEN_FILE:
tag = "layer";
break;
case GAME_OBJECT:
tag = "object";
break;
case WALK_GRID_FILE:
tag = "walkgrid";
break;
case GLOBAL_VAR_FILE:
tag = "globals";
break;
case PARALLAX_FILE_null:
tag = "parallax"; // Not used!
break;
case RUN_LIST:
tag = "runlist";
break;
case TEXT_FILE:
tag = "text";
break;
case SCREEN_MANAGER:
tag = "screen";
break;
case MOUSE_FILE:
tag = "mouse";
break;
case WAV_FILE:
tag = "wav";
break;
case ICON_FILE:
tag = "icon";
break;
case PALETTE_FILE:
tag = "palette";
break;
default:
tag = "unknown";
break;
}
sprintf(buf, "dumps/%s-%d.dmp", tag, res);
if (!Common::File::exists(buf)) {
Common::DumpFile out;
if (out.open(buf))
out.write(_resList[res].ptr, len);
}
}
// close the cluster
file->close();
delete file;
_usedMem += len;
checkMemUsage();
} else if (_resList[res].refCount == 0)
removeFromCacheList(_resList + res);
_resList[res].refCount++;
return _resList[res].ptr;
}
