Serialziing IPicture by Memory Stream

尽管很久没有用Serialize了，但是接手的工程的数据接口就是CArchive，……所以不得不写了一个IPicture数据到CArchive的接口

一个下午增加了一个功能……
[pre]
class CPicture:public CObject
{
DECLARE_SERIAL(CPicture);
virtual void Serialize(CArchive &ar);
CPictureHolder m_ph;
static DWORD m_dwTag;
};
IMPLEMENT_SERIAL(CPicture,CObject,0);
DWORD CPicture::m_dwTag=0x70696331;
void CPicture::Serialize(CArchive &ar)
{
CObject::Serialize(ar);
if (ar.IsStoring())
{
// TODO: add storing code here
ar<
COleStreamFile osf;
LONG lSize=0;
if(osf.CreateMemoryStream()&&m_ph.m_pPict){
m_ph.m_pPict->SaveAsFile(osf.GetStream(),TRUE,&lSize);
}
osf.Flush();
osf.SeekToBegin();
CByteArray baBuf;
baBuf.SetSize(lSize);
osf.Read(baBuf.GetData(),lSize);
baBuf.Serialize(ar);
}
else
{
// TODO: add loading code here
DWORD dwTest;
ar>>dwTest;
if(dwTest!=m_dwTag)
AfxThrowArchiveException(CArchiveException::badClass,NULL);
CByteArray baBuf;
baBuf.Serialize(ar);
COleStreamFile osf;
if(osf.CreateMemoryStream()){
osf.Write(baBuf.GetData(),baBuf.GetSize());
osf.Flush();
osf.SeekToBegin();
if(m_ph.m_pPict){
m_ph.m_pPict->Release();
m_ph.m_pPict=NULL;
}
OleLoadPicture(osf.GetStream(),baBuf.GetSize(),FALSE,IID_IPicture,(LPVOID*)&m_ph.m_pPict);
}
}
}
[/pre]