static fpos_t spSeekStreamRPos(const ZStreamRPos& iStreamRPos, fpos_t iPos, int iWhence)
{
switch (iWhence)
{
case SEEK_SET:
{
iStreamRPos.SetPosition(iPos);
return iStreamRPos.GetPosition();
}
case SEEK_CUR:
{
size_t newPos = iStreamRPos.GetPosition() + iPos;
iStreamRPos.SetPosition(newPos);
return newPos;
}
case SEEK_END:
{
size_t newPos = iStreamRPos.GetSize() + iPos;
iStreamRPos.SetPosition(newPos);
return newPos;
}
}
ZUnimplemented();
return -1;
}
static ZRef<NPaintDataRep> sRead_NPaintDataRep(const ZStreamRPos& iStreamRPos, string& oFormat)
{
iStreamRPos.SetPosition(0);
if (ZRef<NPaintDataRep> theRep = sTryRead_BMP(iStreamRPos))
{
oFormat = "bmp";
return theRep;
}
iStreamRPos.SetPosition(0);
if (ZRef<NPaintDataRep> theRep = sTryRead_GIF(iStreamRPos))
{
oFormat = "gif";
return theRep;
}
iStreamRPos.SetPosition(0);
if (ZRef<NPaintDataRep> theRep = sTryRead_JPEG(iStreamRPos))
{
oFormat = "jpg";
return theRep;
}
iStreamRPos.SetPosition(0);
if (ZRef<NPaintDataRep> theRep = sTryRead_PNG(iStreamRPos))
{
oFormat = "png";
return theRep;
}
iStreamRPos.SetPosition(0);
ZRef<NPaintDataRep> theRep = new NPaintDataRep;
theRep->FromStream(iStreamRPos);
if (theRep->HasData())
{
oFormat = "kf";
return theRep;
}
return new NPaintDataRep(ZPoint(320, 240));
}