diff options
Diffstat (limited to 'engines/tsage/resources.cpp')
| -rw-r--r-- | engines/tsage/resources.cpp | 156 |
1 files changed, 94 insertions, 62 deletions
diff --git a/engines/tsage/resources.cpp b/engines/tsage/resources.cpp index f6f870be20..5987d78067 100644 --- a/engines/tsage/resources.cpp +++ b/engines/tsage/resources.cpp @@ -166,37 +166,7 @@ void TLib::loadSection(uint32 fileOffset) { _file.seek(fileOffset); _sections.fileOffset = fileOffset; - loadSection(_file, _resources); -} - -/** - * Inner logic for decoding a section index into a passed resource list object - */ -void TLib::loadSection(Common::File &f, ResourceList &resources) { - if (f.readUint32BE() != 0x544D492D) - error("Data block is not valid Rlb data"); - - /*uint8 unknown1 = */f.readByte(); - uint16 numEntries = f.readByte(); - - for (uint i = 0; i < numEntries; ++i) { - uint16 id = f.readUint16LE(); - uint16 size = f.readUint16LE(); - uint16 uncSize = f.readUint16LE(); - uint8 sizeHi = f.readByte(); - uint8 type = f.readByte() >> 5; - assert(type <= 1); - uint32 offset = f.readUint32LE(); - - ResourceEntry re; - re.id = id; - re.fileOffset = offset; - re.isCompressed = type != 0; - re.size = ((sizeHi & 0xF) << 16) | size; - re.uncompressedSize = ((sizeHi & 0xF0) << 12) | uncSize; - - resources.push_back(re); - } + ResourceManager::loadSection(_file, _resources); } struct DecodeReference { @@ -342,6 +312,40 @@ byte *TLib::getResource(ResourceType resType, uint16 resNum, uint16 rlbNum, bool return getResource(rlbNum, suppressErrors); } +/** + * Gets the offset of the start of a resource in the resource file + */ +uint32 TLib::getResourceStart(ResourceType resType, uint16 resNum, uint16 rlbNum, ResourceEntry &entry) { + // Find the correct section + SectionList::iterator i = _sections.begin(); + while ((i != _sections.end()) && ((*i).resType != resType || (*i).resNum != resNum)) + ++i; + if (i == _sections.end()) { + error("Unknown resource type %d num %d", resType, resNum); + } + + // Load in the section index + loadSection((*i).fileOffset); + + // Scan for an entry for the given Id + ResourceEntry *re = NULL; + ResourceList::iterator iter; + for (iter = _resources.begin(); iter != _resources.end(); ++iter) { + if ((*iter).id == rlbNum) { + re = &(*iter); + break; + } + } + + // Throw an error if no resource was found, or the resource is compressed + if (!re || re->isCompressed) + error("Invalid resource Id #%d", rlbNum); + + // Return the resource entry as well as the file offset + entry = *re; + return _sections.fileOffset + entry.fileOffset; +} + void TLib::loadIndex() { uint16 resNum, configId, fileOffset; @@ -437,7 +441,7 @@ bool TLib::getMessage(int resNum, int lineNum, Common::String &result, bool supp while (lineNum-- > 0) { srcP += strlen(srcP) + 1; - + if (srcP >= endP) { if (suppressErrors) return false; @@ -453,36 +457,6 @@ bool TLib::getMessage(int resNum, int lineNum, Common::String &result, bool supp /*--------------------------------------------------------------------------*/ -/** - * Open up the main resource file and get an entry from the root section - */ -bool TLib::getSectionEntry(Common::File &f, ResourceType resType, int rlbNum, int resNum, - ResourceEntry &resEntry) { - // Try and open the resource file - if (!f.open(_filename)) - return false; - - // Load the root section index - ResourceList resList; - loadSection(f, resList); - - // Loop through the index for the desired entry - ResourceList::iterator iter; - for (iter = _resources.begin(); iter != _resources.end(); ++iter) { - ResourceEntry &re = *iter; - if (re.id == resNum) { - // Found it, so exit - resEntry = re; - return true; - } - } - - // No matching entry found - return false; -} - -/*--------------------------------------------------------------------------*/ - ResourceManager::~ResourceManager() { for (uint idx = 0; idx < _libList.size(); ++idx) delete _libList[idx]; @@ -557,4 +531,62 @@ Common::String ResourceManager::getMessage(int resNum, int lineNum, bool suppres return Common::String(); } +/*--------------------------------------------------------------------------*/ + +/** + * Open up the given resource file using a passed file object. If the desired entry is found + * in the index, return the index entry for it, and move the file to the start of the resource + */ +bool ResourceManager::scanIndex(Common::File &f, ResourceType resType, int rlbNum, int resNum, + ResourceEntry &resEntry) { + // Load the root section index + ResourceList resList; + loadSection(f, resList); + + // Loop through the index for the desired entry + ResourceList::iterator iter; + for (iter = resList.begin(); iter != resList.end(); ++iter) { + ResourceEntry &re = *iter; + if (re.id == resNum) { + // Found it, so exit + resEntry = re; + f.seek(re.fileOffset); + return true; + } + } + + // No matching entry found + return false; +} + +/** + * Inner logic for decoding a section index into a passed resource list object + */ +void ResourceManager::loadSection(Common::File &f, ResourceList &resources) { + if (f.readUint32BE() != 0x544D492D) + error("Data block is not valid Rlb data"); + + /*uint8 unknown1 = */f.readByte(); + uint16 numEntries = f.readByte(); + + for (uint i = 0; i < numEntries; ++i) { + uint16 id = f.readUint16LE(); + uint16 size = f.readUint16LE(); + uint16 uncSize = f.readUint16LE(); + uint8 sizeHi = f.readByte(); + uint8 type = f.readByte() >> 5; + assert(type <= 1); + uint32 offset = f.readUint32LE(); + + ResourceEntry re; + re.id = id; + re.fileOffset = offset; + re.isCompressed = type != 0; + re.size = ((sizeHi & 0xF) << 16) | size; + re.uncompressedSize = ((sizeHi & 0xF0) << 12) | uncSize; + + resources.push_back(re); + } +} + } // end of namespace TsAGE |