Method _read

Engine/source/core/resizeStream.cpp:122–158

}

bool ResizeFilterStream::_read(const U32 in_numBytes, void* out_pBuffer)
{
   AssertFatal(m_pStream != NULL, "Error, stream not attached");
   m_lastBytesRead = 0;

   if (in_numBytes == 0)
      return true;

   AssertFatal(out_pBuffer != NULL, "Invalid output buffer");
   if (getStatus() == Closed) {
      AssertFatal(false, "Attempted read from closed stream");
      return false;
   }

   U32 savePosition = m_pStream->getPosition();
   if (m_pStream->setPosition(m_startOffset + m_currOffset) == false)
      return false;

   U32 actualSize = in_numBytes;
   U32 position   = m_startOffset + m_currOffset;
   if (in_numBytes + position > m_startOffset + m_streamLen)
      actualSize = m_streamLen - (position - m_startOffset);

   if (actualSize == 0) {
      setStatus(EOS);
      return false;
   }

   bool success = m_pStream->read(actualSize, out_pBuffer);
   m_currOffset += actualSize;
   m_lastBytesRead = actualSize;

   setStatus(m_pStream->getStatus());

   m_pStream->setPosition(savePosition);
   return success;
}