bool SkEdgeClipper::clipCubic(const SkPoint srcPts[4], const SkRect& clip) {
fCurrPoint = fPoints;
fCurrVerb = fVerbs;
SkRect bounds;
bounds.set(srcPts, 4);
if (!quick_reject(bounds, clip)) {
SkPoint monoY[10];
int countY = SkChopCubicAtYExtrema(srcPts, monoY);
for (int y = 0; y <= countY; y++) {
// sk_assert_monotonic_y(&monoY[y * 3], 4);
SkPoint monoX[10];
int countX = SkChopCubicAtXExtrema(&monoY[y * 3], monoX);
for (int x = 0; x <= countX; x++) {
// sk_assert_monotonic_y(&monoX[x * 3], 4);
// sk_assert_monotonic_x(&monoX[x * 3], 4);
this->clipMonoCubic(&monoX[x * 3], clip);
SkASSERT(fCurrVerb - fVerbs < kMaxVerbs);
SkASSERT(fCurrPoint - fPoints <= kMaxPoints);
}
}
}
*fCurrVerb = SkPath::kDone_Verb;
fCurrPoint = fPoints;
fCurrVerb = fVerbs;
return SkPath::kDone_Verb != fVerbs[0];
}
int SkNumXRayCrossingsForCubic(const SkXRay& pt, const SkPoint cubic[4]) {
int num_crossings = 0;
SkPoint monotonic_cubics[10];
int num_monotonic_cubics = SkChopCubicAtYExtrema(cubic, monotonic_cubics);
if (SkXRayCrossesMonotonicCubic(pt, &monotonic_cubics[0]))
++num_crossings;
if (num_monotonic_cubics > 0)
if (SkXRayCrossesMonotonicCubic(pt, &monotonic_cubics[3]))
++num_crossings;
if (num_monotonic_cubics > 1)
if (SkXRayCrossesMonotonicCubic(pt, &monotonic_cubics[6]))
++num_crossings;
return num_crossings;
}