SkInterpolatorBase::Result SkOperandInterpolator::timeToValues(SkMSec time, SkOperand values[]) const
{
SkScalar T;
int index;
SkBool exact;
Result result = timeToT(time, &T, &index, &exact);
if (values)
{
const SkOperand* nextSrc = &fValues[index * fElemCount];
if (exact)
memcpy(values, nextSrc, fElemCount * sizeof(SkScalar));
else
{
SkASSERT(index > 0);
const SkOperand* prevSrc = nextSrc - fElemCount;
if (fType == SkType_Float || fType == SkType_3D_Point) {
for (int i = fElemCount - 1; i >= 0; --i)
values[i].fScalar = SkScalarInterp(prevSrc[i].fScalar, nextSrc[i].fScalar, T);
} else if (fType == SkType_Int || fType == SkType_MSec) {
for (int i = fElemCount - 1; i >= 0; --i) {
int32_t a = prevSrc[i].fS32;
int32_t b = nextSrc[i].fS32;
values[i].fS32 = a + SkScalarRound((b - a) * T);
}
} else
memcpy(values, prevSrc, sizeof(SkOperand) * fElemCount);
}
}
return result;
}
SkInterpolator::Result SkInterpolator::timeToValues(SkMSec time,
SkScalar values[]) const {
SkScalar T;
int index;
SkBool exact;
Result result = timeToT(time, &T, &index, &exact);
if (values) {
const SkScalar* nextSrc = &fValues[index * fElemCount];
if (exact) {
memcpy(values, nextSrc, fElemCount * sizeof(SkScalar));
} else {
SkASSERT(index > 0);
const SkScalar* prevSrc = nextSrc - fElemCount;
for (int i = fElemCount - 1; i >= 0; --i) {
values[i] = SkScalarInterp(prevSrc[i], nextSrc[i], T);
}
}
}
return result;
}
