int SkDConic::FindExtrema(const double src[], SkScalar w, double t[1]) {
double coeff[3];
conic_deriv_coeff(src, w, coeff);
double tValues[2];
int roots = SkDQuad::RootsValidT(coeff[0], coeff[1], coeff[2], tValues);
SkASSERT(0 == roots || 1 == roots);
if (1 == roots) {
t[0] = tValues[0];
return 1;
}
return 0;
}
int SkDConic::FindExtrema(const double src[], SkScalar w, double t[1]) {
double coeff[3];
conic_deriv_coeff(src, w, coeff);
double tValues[2];
int roots = SkDQuad::RootsValidT(coeff[0], coeff[1], coeff[2], tValues);
// In extreme cases, the number of roots returned can be 2. Pathops
// will fail later on, so there's no advantage to plumbing in an error
// return here.
// SkASSERT(0 == roots || 1 == roots);
if (1 == roots) {
t[0] = tValues[0];
return 1;
}
return 0;
}
static double conic_eval_tan(const double coord[], SkScalar w, double t) {
double coeff[3];
conic_deriv_coeff(coord, w, coeff);
return t * (t * coeff[0] + coeff[1]) + coeff[2];
}
