IEffectPainter *CEffectCreator::CreatePainterFromStreamAndCreator (SLoadCtx &Ctx, CEffectCreator *pCreator)
// CreatePainterFromStreamAndCreator
//
// Load a painter from a stream given a creator
{
// Older versions did not save UNID or class if there was no creator
if (Ctx.dwVersion < 43 && pCreator == NULL)
return NULL;
// The UNID is ignored (because it is the UNID of the creator)
IEffectPainter::ReadUNID(Ctx);
// Validate the class
if (IEffectPainter::ValidateClass(Ctx, pCreator ? pCreator->GetTag() : NULL_STR) != NOERROR)
return NULL;
// Load it
if (pCreator == NULL)
return NULL;
IEffectPainter *pPainter = pCreator->CreatePainter();
pPainter->ReadFromStream(Ctx);
// Done
return pPainter;
}
ALERROR IEffectPainter::ValidateClass (SLoadCtx &Ctx, const CString &sOriginalClass)
// ValidateClass
//
// Reads the class string. If the class does not match the current painter,
// we read the old data and return ERR_FAIL.
{
if (Ctx.dwVersion >= 40)
{
CString sClass;
sClass.ReadFromStream(Ctx.pStream);
// If the original class doesn't match the current one, then it means
// that the design changed. In that case, we load the painter using the
// old class.
if (!strEquals(sClass, sOriginalClass))
{
// If sClass is blank, then it means that the original did not have
// an effect painter (but the current design does)
if (!sClass.IsBlank())
{
// Get the original creator
CEffectCreator *pOriginalCreator;
if (CEffectCreator::CreateFromTag(sClass, &pOriginalCreator) != NOERROR)
{
kernelDebugLogMessage("Unable to find original effect creator: %s", sClass.GetASCIIZPointer());
return ERR_FAIL;
}
// Load the original painter
IEffectPainter *pOriginalPainter = pOriginalCreator->CreatePainter();
pOriginalPainter->ReadFromStream(Ctx);
// Discard
pOriginalPainter->Delete();
delete pOriginalCreator;
}
// Done
return ERR_FAIL;
}
}
return NOERROR;
}
IEffectPainter *CEffectCreator::CreatePainterFromStream (SLoadCtx &Ctx, bool bNullCreator)
// CreatePainterFromStream
//
// Load a painter from a stream
{
CEffectCreator *pCreator;
// For previous versions, we only stored UNID if we had a creator
if (Ctx.dwVersion < 43 && bNullCreator)
return NULL;
// At version 15 we started saving versions as string UNIDs. We need to do this
// because sometimes the effect creator is inside a weapon fire desc
// structure (also identified by string UNIDs).
if (Ctx.dwVersion >= 15)
{
CString sUNID;
sUNID.ReadFromStream(Ctx.pStream);
pCreator = (sUNID.IsBlank() ? NULL : CEffectCreator::FindEffectCreator(sUNID));
// Load the creator class that saved the painter
if (IEffectPainter::ValidateClass(Ctx, (pCreator ? pCreator->GetTag() : NULL_STR)) != NOERROR)
return NULL;
// Error
if (pCreator == NULL)
{
if (!sUNID.IsBlank())
kernelDebugLogMessage("Invalid painter creator: %s", sUNID.GetASCIIZPointer());
return NULL;
}
}
// Old style uses DWORD UNIDs
else
{
// The first DWORD is the UNID of the creator
DWORD dwUNID;
Ctx.pStream->Read((char *)&dwUNID, sizeof(DWORD));
if (dwUNID == 0)
return NULL;
pCreator = g_pUniverse->FindEffectType(dwUNID);
// Error
if (pCreator == NULL)
{
kernelDebugLogMessage("Invalid painter creator: %x", dwUNID);
return NULL;
}
}
// Let the creator create the object
IEffectPainter *pPainter = pCreator->CreatePainter();
// Load it
pPainter->ReadFromStream(Ctx);
// Done
return pPainter;
}
