void BlockStream::SetSize(int64 size)
{
if(IsError() || !IsOpen()) return;
int64 pos = GetPos();
Flush();
Seek(0);
SetStreamSize(size);
streamsize = size;
Seek(pos < size ? pos : size);
}
void BlockStream::Seek(int64 apos) {
if(IsError()) return;
LLOG("Seek " << apos);
if(style & STRM_WRITE) {
SetPos(apos);
if(apos > streamsize) {
SetStreamSize(apos);
streamsize = apos;
}
}
else {
if(apos > streamsize)
apos = streamsize;
SetPos(apos);
}
}
BOOL DecodeUCI(MEMORY_STREAM *pStream)
{
UCIInfo uci;
PBYTE pbBuffer, pbRaw;
Int32 Stride;
Large_Integer NewSize;
SBitMapHeader header;
if ((*(PULONG)pStream->pbBuffer & 0xFFFFFF) != TAG3('UCI'))
return False;
if (UCIDecodeEx(pStream->lpBuffer, pStream->Size, &uci, False) < 0)
return False;
InitBitmapHeader(&header, uci.Width, uci.Height, uci.BitsPerPixel, &Stride);
NewSize.QuadPart = header.dwFileSize;
SetStreamSize(pStream, NewSize);
pbBuffer = pStream->pbBuffer;
*(SBitMapHeader *)pbBuffer = header;
pbBuffer += sizeof(header);
pbBuffer += (uci.Height - 1) * Stride;
pbRaw = uci.pbBuffer;
for (LONG h = 0; h != uci.Height; ++h)
{
CopyMemory(pbBuffer, pbRaw, uci.Stride);
pbBuffer -= Stride;
pbRaw += uci.Stride;
}
UCIFreeEx(&uci);
return True;
}
