ByteArray Inflate(ByteArray CompressedSource, int& err, uint32_t ChunkSize = 0x100000 )
{
// Create a dynamic buffer to hold compressed blocks
vector<unique_ptr<byte> > blocks;
z_stream strm = {};
strm.data_type = Z_BINARY;
strm.total_in = strm.avail_in = (uInt)CompressedSource->size();
strm.next_in = CompressedSource->data();
err = inflateInit2(&strm, (15 + 32)); //15 window bits, and the +32 tells zlib to to detect if using gzip or zlib
while (err == Z_OK || err == Z_BUF_ERROR)
{
strm.avail_out = ChunkSize;
strm.next_out = (byte*)malloc(ChunkSize);
blocks.emplace_back(strm.next_out);
err = inflate(&strm, Z_NO_FLUSH);
}
if (err != Z_STREAM_END)
{
inflateEnd(&strm);
return NullFile;
}
ASSERT(strm.total_out > 0, "Nothing to decompress");
Utility::ByteArray byteArray = make_shared<vector<byte> >( strm.total_out );
// Allocate actual memory for this.
// copy the bits into that RAM.
// Free everything else up!!
void* curDest = byteArray->data();
size_t remaining = byteArray->size();
for (size_t i = 0; i < blocks.size(); ++i)
{
ASSERT(remaining > 0);
size_t CopySize = min(remaining, (size_t)ChunkSize);
memcpy(curDest, blocks[i].get(), CopySize);
curDest = (byte*)curDest + CopySize;
remaining -= CopySize;
}
inflateEnd(&strm);
return byteArray;
}
bool Load( const wstring& fileName )
{
Utility::ByteArray ba = Utility::ReadFileSync( fileName );
if (ba->size() == 0)
{
ERROR( "Cannot open file %ls", fileName.c_str() );
return false;
}
LoadFromBinary( fileName.c_str(), ba->data(), ba->size() );
return true;
}
const ManagedTexture* TextureManager::LoadDDSFromFile( const std::wstring& fileName, bool sRGB )
{
auto ManagedTex = FindOrLoadTexture(fileName);
ManagedTexture* ManTex = ManagedTex.first;
const bool RequestsLoad = ManagedTex.second;
if (!RequestsLoad)
{
ManTex->WaitForLoad();
return ManTex;
}
Utility::ByteArray ba = Utility::ReadFileSync( s_RootPath + fileName );
if (ba->size() == 0 || !ManTex->CreateDDSFromMemory( ba->data(), ba->size(), sRGB ))
ManTex->SetToInvalidTexture();
return ManTex;
}
ByteArray ReadFileHelper(const wstring& fileName)
{
struct _stat64 fileStat;
int fileExists = _wstat64(fileName.c_str(), &fileStat);
if (fileExists == -1)
return NullFile;
ifstream& file = ifstream( fileName, ios::in | ios::binary );
if (!file)
return NullFile;
Utility::ByteArray byteArray = make_shared<vector<byte> >( file.seekg(0, ios::end).tellg() );
file.seekg(0, ios::beg).read( (char*)byteArray->data(), byteArray->size() );
file.close();
ASSERT(byteArray->size() == fileStat.st_size);
return byteArray;
}