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;
}
void CSmokeTrailPainter::OnReadFromStream (SLoadCtx &Ctx)
// OnReadFromStream
//
// Load from stream
{
m_Particles.ReadFromStream(Ctx);
Ctx.pStream->Read((char *)&m_iLastDirection, sizeof(DWORD));
Ctx.pStream->Read((char *)&m_iEmitLifetime, sizeof(DWORD));
Ctx.pStream->Read((char *)&m_iTick, sizeof(DWORD));
if (m_pParticlePainter)
m_pParticlePainter->Delete();
m_pParticlePainter = CEffectCreator::CreatePainterFromStreamAndCreator(Ctx, m_pCreator->GetParticleEffect());
}
void CEffectEntry::GetImage (const CCompositeImageSelector &Selector, CObjectImageArray *retImage)
// GetImage
//
// Fills in the image
{
// Short circuit
if (m_pEffect.IsEmpty())
{
*retImage = EMPTY_IMAGE;
return;
}
// Create a painter
CCreatePainterCtx Ctx;
IEffectPainter *pPainter = m_pEffect->CreatePainter(Ctx);
if (pPainter == NULL)
{
*retImage = EMPTY_IMAGE;
return;
}
// Get the painter bounds
RECT rcBounds;
pPainter->GetBounds(&rcBounds);
int cxWidth = RectWidth(rcBounds);
int cyHeight = RectHeight(rcBounds);
// Manual compositing
bool bCanComposite = pPainter->CanPaintComposite();
// Create a resulting image
CG32bitImage *pDest = new CG32bitImage;
pDest->Create(cxWidth, cyHeight, CG32bitImage::alpha8, (bCanComposite ? CG32bitPixel::Null() : CG32bitPixel(0)));
// Set up paint context
SViewportPaintCtx PaintCtx;
// Since we don't have an object, we use the viewport center to indicate
// the center of the object.
PaintCtx.xCenter = -rcBounds.left;
PaintCtx.yCenter = -rcBounds.top;
// Paint
pPainter->PaintComposite(*pDest, (cxWidth / 2), (cyHeight / 2), PaintCtx);
// Initialize an image
RECT rcFinalRect;
rcFinalRect.left = 0;
rcFinalRect.top = 0;
rcFinalRect.right = cxWidth;
rcFinalRect.bottom = cyHeight;
CObjectImageArray Comp;
Comp.Init(pDest, rcFinalRect, 0, 0, true);
// Done
retImage->TakeHandoff(Comp);
pPainter->Delete();
}