diff options
Diffstat (limited to 'engines/chewy/resource.cpp')
-rw-r--r-- | engines/chewy/resource.cpp | 70 |
1 files changed, 62 insertions, 8 deletions
diff --git a/engines/chewy/resource.cpp b/engines/chewy/resource.cpp index 1bd9583a72..b8fba3713c 100644 --- a/engines/chewy/resource.cpp +++ b/engines/chewy/resource.cpp @@ -30,17 +30,37 @@ namespace Chewy { Resource::Resource(Common::String filename) { + const uint32 headerGeneric = MKTAG('N', 'G', 'S', '\0'); + const uint32 headerTxtDec = MKTAG('T', 'C', 'F', '\0'); + const uint32 headerTxtEnc = MKTAG('T', 'C', 'F', '\1'); + _stream.open(filename); - uint32 magicBytes = MKTAG('N', 'G', 'S', '\0'); - if (_stream.readUint32BE() != magicBytes) + + uint32 header = _stream.readUint32BE(); + bool isText = header == headerTxtDec || header == headerTxtEnc; + + if (header != headerGeneric && !isText) error("Invalid resource - %s", filename.c_str()); - _resType = (ResourceType)_stream.readUint16LE(); + + if (isText) { + _resType = kResourceTCF; + _encrypted = (header == headerTxtEnc); + } else { + _resType = (ResourceType)_stream.readUint16LE(); + _encrypted = false; + } + _chunkCount = _stream.readUint16LE(); for (uint i = 0; i < _chunkCount; i++) { Chunk cur; cur.size = _stream.readUint32LE(); - cur.type = (ResourceType)_stream.readUint16LE(); + + if (!isText) + cur.type = (ResourceType)_stream.readUint16LE(); + else + cur.num = _stream.readUint16LE(); + cur.pos = _stream.pos(); _stream.skip(cur.size); @@ -57,11 +77,15 @@ uint32 Resource::getChunkCount() const { return _chunkList.size(); } -Chunk *Resource::getChunk(int num) { +Chunk *Resource::getChunk(uint num) { + assert(num < _chunkList.size()); + return &_chunkList[num]; } -byte *Resource::getChunkData(int num) { +byte *Resource::getChunkData(uint num) { + assert(num < _chunkList.size()); + Chunk *chunk = &_chunkList[num]; byte *data = new byte[chunk->size]; @@ -71,7 +95,9 @@ byte *Resource::getChunkData(int num) { return data; } -TBFChunk *BackgroundResource::getImage(int num) { +TBFChunk *BackgroundResource::getImage(uint num) { + assert(num < _chunkList.size()); + Chunk *chunk = &_chunkList[num]; TBFChunk *tbf = new TBFChunk(); @@ -111,7 +137,9 @@ TBFChunk *BackgroundResource::getImage(int num) { return tbf; } -SoundChunk *SoundResource::getSound(int num) { +SoundChunk *SoundResource::getSound(uint num) { + assert(num < _chunkList.size()); + Chunk *chunk = &_chunkList[num]; SoundChunk *sound = new SoundChunk(); @@ -155,4 +183,30 @@ SoundChunk *SoundResource::getSound(int num) { return sound; } +Common::String TextResource::getText(uint num) { + assert(num < _chunkList.size()); + + Chunk *chunk = &_chunkList[num]; + Common::String str; + byte *data = new byte[chunk->size]; + + _stream.seek(chunk->pos, SEEK_SET); + + _stream.read(data, chunk->size); + + if (_encrypted) { + byte *c = data; + + for (uint i = 0; i < chunk->size; i++) { + *c = -(*c); + ++c; + } + } + + str = (char *)data; + delete[] data; + + return str; +} + } // End of namespace Chewy |