nsresult
SVGViewBoxSMILType::Interpolate(const nsSMILValue& aStartVal,
const nsSMILValue& aEndVal,
double aUnitDistance,
nsSMILValue& aResult) const
{
NS_PRECONDITION(aStartVal.mType == aEndVal.mType,
"Trying to interpolate different types");
NS_PRECONDITION(aStartVal.mType == this,
"Unexpected types for interpolation");
NS_PRECONDITION(aResult.mType == this, "Unexpected result type");
const nsSVGViewBoxRect* start = static_cast<const nsSVGViewBoxRect*>(aStartVal.mU.mPtr);
const nsSVGViewBoxRect* end = static_cast<const nsSVGViewBoxRect*>(aEndVal.mU.mPtr);
nsSVGViewBoxRect* current = static_cast<nsSVGViewBoxRect*>(aResult.mU.mPtr);
float x = (start->x + (end->x - start->x) * aUnitDistance);
float y = (start->y + (end->y - start->y) * aUnitDistance);
float width = (start->width + (end->width - start->width) * aUnitDistance);
float height = (start->height + (end->height - start->height) * aUnitDistance);
*current = nsSVGViewBoxRect(x, y, width, height);
return NS_OK;
}
nsSVGViewBoxRect
SVGMarkerElement::GetViewBoxRect()
{
if (mViewBox.HasRect()) {
return mViewBox.GetAnimValue();
}
return nsSVGViewBoxRect(
0, 0,
mLengthAttributes[MARKERWIDTH].GetAnimValue(mCoordCtx),
mLengthAttributes[MARKERHEIGHT].GetAnimValue(mCoordCtx));
}