int SkOpEdgeBuilder::preFetch() {
if (!fPath->isFinite()) {
fUnparseable = true;
return 0;
}
SkAutoConicToQuads quadder;
const SkScalar quadderTol = SK_Scalar1 / 16;
SkPath::RawIter iter(*fPath);
SkPoint curveStart;
SkPoint curve[4];
SkPoint pts[4];
SkPath::Verb verb;
bool lastCurve = false;
do {
verb = iter.next(pts);
switch (verb) {
case SkPath::kMove_Verb:
if (!fAllowOpenContours && lastCurve) {
closeContour(curve[0], curveStart);
}
fPathVerbs.push_back(verb);
force_small_to_zero(&pts[0]);
fPathPts.push_back(pts[0]);
curveStart = curve[0] = pts[0];
lastCurve = false;
continue;
case SkPath::kLine_Verb:
force_small_to_zero(&pts[1]);
if (SkDPoint::ApproximatelyEqual(curve[0], pts[1])) {
uint8_t lastVerb = fPathVerbs.back();
if (lastVerb != SkPath::kLine_Verb && lastVerb != SkPath::kMove_Verb) {
fPathPts.back() = pts[1];
}
continue; // skip degenerate points
}
break;
case SkPath::kQuad_Verb:
force_small_to_zero(&pts[1]);
force_small_to_zero(&pts[2]);
curve[1] = pts[1];
curve[2] = pts[2];
verb = SkReduceOrder::Quad(curve, pts);
if (verb == SkPath::kMove_Verb) {
continue; // skip degenerate points
}
break;
case SkPath::kConic_Verb: {
const SkPoint* quadPts = quadder.computeQuads(pts, iter.conicWeight(),
quadderTol);
const int nQuads = quadder.countQuads();
for (int i = 0; i < nQuads; ++i) {
fPathVerbs.push_back(SkPath::kQuad_Verb);
}
fPathPts.push_back_n(nQuads * 2, &quadPts[1]);
curve[0] = pts[2];
lastCurve = true;
}
continue;
case SkPath::kCubic_Verb:
force_small_to_zero(&pts[1]);
force_small_to_zero(&pts[2]);
force_small_to_zero(&pts[3]);
curve[1] = pts[1];
curve[2] = pts[2];
curve[3] = pts[3];
verb = SkReduceOrder::Cubic(curve, pts);
if (verb == SkPath::kMove_Verb) {
continue; // skip degenerate points
}
break;
case SkPath::kClose_Verb:
closeContour(curve[0], curveStart);
lastCurve = false;
continue;
case SkPath::kDone_Verb:
continue;
}
fPathVerbs.push_back(verb);
int ptCount = SkPathOpsVerbToPoints(verb);
fPathPts.push_back_n(ptCount, &pts[1]);
curve[0] = pts[ptCount];
lastCurve = true;
} while (verb != SkPath::kDone_Verb);
if (!fAllowOpenContours && lastCurve) {
closeContour(curve[0], curveStart);
}
fPathVerbs.push_back(SkPath::kDone_Verb);
return fPathVerbs.count() - 1;
}
int SkOpEdgeBuilder::preFetch() {
if (!fPath->isFinite()) {
fUnparseable = true;
return 0;
}
SkPath::RawIter iter(*fPath);
SkPoint curveStart;
SkPoint curve[4];
SkPoint pts[4];
SkPath::Verb verb;
bool lastCurve = false;
do {
verb = iter.next(pts);
switch (verb) {
case SkPath::kMove_Verb:
if (!fAllowOpenContours && lastCurve) {
closeContour(curve[0], curveStart);
}
*fPathVerbs.append() = verb;
force_small_to_zero(&pts[0]);
*fPathPts.append() = pts[0];
curveStart = curve[0] = pts[0];
lastCurve = false;
continue;
case SkPath::kLine_Verb:
force_small_to_zero(&pts[1]);
if (SkDPoint::ApproximatelyEqual(curve[0], pts[1])) {
uint8_t lastVerb = fPathVerbs.top();
if (lastVerb != SkPath::kLine_Verb && lastVerb != SkPath::kMove_Verb) {
fPathPts.top() = pts[1];
}
continue; // skip degenerate points
}
break;
case SkPath::kQuad_Verb:
force_small_to_zero(&pts[1]);
force_small_to_zero(&pts[2]);
curve[1] = pts[1];
curve[2] = pts[2];
verb = SkReduceOrder::Quad(curve, pts);
if (verb == SkPath::kMove_Verb) {
continue; // skip degenerate points
}
break;
case SkPath::kConic_Verb:
force_small_to_zero(&pts[1]);
force_small_to_zero(&pts[2]);
curve[1] = pts[1];
curve[2] = pts[2];
verb = SkReduceOrder::Quad(curve, pts);
if (SkPath::kQuad_Verb == verb && 1 != iter.conicWeight()) {
verb = SkPath::kConic_Verb;
} else if (verb == SkPath::kMove_Verb) {
continue; // skip degenerate points
}
break;
case SkPath::kCubic_Verb:
force_small_to_zero(&pts[1]);
force_small_to_zero(&pts[2]);
force_small_to_zero(&pts[3]);
curve[1] = pts[1];
curve[2] = pts[2];
curve[3] = pts[3];
verb = SkReduceOrder::Cubic(curve, pts);
if (verb == SkPath::kMove_Verb) {
continue; // skip degenerate points
}
break;
case SkPath::kClose_Verb:
closeContour(curve[0], curveStart);
lastCurve = false;
continue;
case SkPath::kDone_Verb:
continue;
}
*fPathVerbs.append() = verb;
int ptCount = SkPathOpsVerbToPoints(verb);
fPathPts.append(ptCount, &pts[1]);
if (verb == SkPath::kConic_Verb) {
*fWeights.append() = iter.conicWeight();
}
curve[0] = pts[ptCount];
lastCurve = true;
} while (verb != SkPath::kDone_Verb);
if (!fAllowOpenContours && lastCurve) {
closeContour(curve[0], curveStart);
}
*fPathVerbs.append() = SkPath::kDone_Verb;
return fPathVerbs.count() - 1;
}
