From 2ddff9388694263c7be9347de7eb768cd0847997 Mon Sep 17 00:00:00 2001 From: "caryclark@google.com" Date: Tue, 7 Aug 2012 21:25:27 +0000 Subject: shape ops work in progress milestone: all rect tests (639706) work git-svn-id: http://skia.googlecode.com/svn/trunk@4996 2bbb7eff-a529-9590-31e7-b0007b416f81 --- experimental/Intersection/Simplify.cpp | 246 +++++++++++++++++++-------------- 1 file changed, 144 insertions(+), 102 deletions(-) (limited to 'experimental/Intersection/Simplify.cpp') diff --git a/experimental/Intersection/Simplify.cpp b/experimental/Intersection/Simplify.cpp index ac6b20dd61..0b8eccfb2a 100644 --- a/experimental/Intersection/Simplify.cpp +++ b/experimental/Intersection/Simplify.cpp @@ -27,7 +27,7 @@ int gDebugMaxWindValue = SK_MaxS32; #define DEBUG_UNUSED 0 // set to expose unused functions -#if 0 // set to 1 for multiple thread -- no debugging +#if 01 // set to 1 for multiple thread -- no debugging const bool gRunTestsInOneThread = false; @@ -491,11 +491,6 @@ public: return fEnd; } - bool firstBump(int sumWinding) const { - SkDebugf("%s sign=%d sumWinding=%d\n", __FUNCTION__, sign(), sumWinding); - return sign() * sumWinding > 0; - } - bool isHorizontal() const { return fDy == 0 && fDDy == 0 && fDDDy == 0; } @@ -659,6 +654,20 @@ struct Bounds : public SkRect { } }; +static bool useInnerWinding(int outerWinding, int innerWinding) { + SkASSERT(outerWinding != innerWinding); + int absOut = abs(outerWinding); + int absIn = abs(innerWinding); + bool result = absOut == absIn ? outerWinding < 0 : absOut < absIn; + if (outerWinding * innerWinding < 0) { +#if DEBUG_WINDING + SkDebugf("%s *** outer=%d inner=%d result=%s\n", __FUNCTION__, + outerWinding, innerWinding, result ? "true" : "false"); +#endif + } + return result; +} + struct Span { Segment* fOther; mutable SkPoint fPt; // lazily computed as needed @@ -668,6 +677,7 @@ struct Span { int fWindSum; // accumulated from contours surrounding this one int fWindValue; // 0 == canceled; 1 == normal; >1 == coincident bool fDone; // if set, this span to next higher T has been processed + bool fOutside; // if set, sum is outside, sum + sign * value computes inside }; class Segment { @@ -760,14 +770,12 @@ public: angle->set(edge, fVerb, this, start, end); } - void addCancelOutsides(const SkTDArray& outsideTs, Segment& other, + void addCancelOutsides(double tStart, double oStart, Segment& other, double oEnd) { int tIndex = -1; int tCount = fTs.count(); int oIndex = -1; int oCount = other.fTs.count(); - double tStart = outsideTs[0]; - double oStart = outsideTs[1]; do { ++tIndex; } while (tStart - fTs[tIndex].fT >= FLT_EPSILON && tIndex < tCount); @@ -800,7 +808,7 @@ public: fTs[tIndexStart].fT, xyAtT(tIndexStart).fX, xyAtT(tIndexStart).fY); #endif - addTPair(fTs[tIndexStart].fT, other, other.fTs[oIndex].fT); + addTPair(fTs[tIndexStart].fT, other, other.fTs[oIndex].fT, false); } if (nextT < 1 && fTs[tIndex].fWindValue) { #if DEBUG_CONCIDENT @@ -809,7 +817,7 @@ public: fTs[tIndex].fT, xyAtT(tIndex).fX, xyAtT(tIndex).fY); #endif - addTPair(fTs[tIndex].fT, other, other.fTs[oIndexStart].fT); + addTPair(fTs[tIndex].fT, other, other.fTs[oIndexStart].fT, false); } } else { SkASSERT(!other.fTs[oIndexStart].fWindValue); @@ -850,7 +858,7 @@ public: ++oIndex; } while (oStart - other.fTs[oIndex].fT >= FLT_EPSILON); if (tIndex > 0 || oIndex > 0) { - addTPair(tStart, other, oStart); + addTPair(tStart, other, oStart, false); } tStart = fTs[tIndex].fT; oStart = other.fTs[oIndex].fT; @@ -867,7 +875,7 @@ public: if (tStart == 1 && oStart == 1) { break; } - addTPair(tStart, other, oStart); + addTPair(tStart, other, oStart, false); } while (tStart < 1 && oStart < 1 && oEnd - oStart >= FLT_EPSILON); } @@ -973,6 +981,7 @@ public: span->fPt.fX = SK_ScalarNaN; span->fWindSum = SK_MinS32; span->fWindValue = 1; + span->fOutside = false; if ((span->fDone = newT == 1)) { ++fDoneSpans; } @@ -985,7 +994,7 @@ public: // two span in one segment are separated by float epsilon on one span but // not the other, if one segment is very small. For this // case the counts asserted below may or may not be enough to separate the - // spans. Even if the counts work out, what if the spanw aren't correctly + // spans. Even if the counts work out, what if the spans aren't correctly // sorted? It feels better in such a case to match the span's other span // pointer since both coincident segments must contain the same spans. void addTCancel(double startT, double endT, Segment& other, @@ -1035,10 +1044,20 @@ public: SkASSERT(!oIndex || oTest->fT <= oStartT - FLT_EPSILON); // FIXME: determine if canceled edges need outside ts added if (!done() && outsideTs.count()) { - addCancelOutsides(outsideTs, other, oEndT); + double tStart = outsideTs[0]; + double oStart = outsideTs[1]; + addCancelOutsides(tStart, oStart, other, oEndT); + int count = outsideTs.count(); + if (count > 2) { + double tStart = outsideTs[count - 2]; + double oStart = outsideTs[count - 1]; + addCancelOutsides(tStart, oStart, other, oEndT); + } } if (!other.done() && oOutsideTs.count()) { - other.addCancelOutsides(oOutsideTs, *this, endT); + double tStart = oOutsideTs[0]; + double oStart = oOutsideTs[1]; + other.addCancelOutsides(tStart, oStart, *this, endT); } } @@ -1123,14 +1142,14 @@ public: // FIXME: this doesn't prevent the same span from being added twice // fix in caller, assert here? - void addTPair(double t, Segment& other, double otherT) { + void addTPair(double t, Segment& other, double otherT, bool borrowWind) { int tCount = fTs.count(); for (int tIndex = 0; tIndex < tCount; ++tIndex) { const Span& span = fTs[tIndex]; - if (span.fT > t) { + if (span.fT - t >= FLT_EPSILON) { break; } - if (span.fT == t && span.fOther == &other && span.fOtherT == otherT) { + if (span.fT - t < FLT_EPSILON && span.fOther == &other && span.fOtherT == otherT) { #if DEBUG_ADD_T_PAIR SkDebugf("%s addTPair duplicate this=%d %1.9g other=%d %1.9g\n", __FUNCTION__, fID, t, other.fID, otherT); @@ -1146,8 +1165,8 @@ public: int otherInsertedAt = other.addT(otherT, this); addOtherT(insertedAt, otherT, otherInsertedAt); other.addOtherT(otherInsertedAt, t, insertedAt); - matchWindingValue(insertedAt, t); - other.matchWindingValue(otherInsertedAt, otherT); + matchWindingValue(insertedAt, t, borrowWind); + other.matchWindingValue(otherInsertedAt, otherT, borrowWind); } void addTwoAngles(int start, int end, SkTDArray& angles) const { @@ -1239,8 +1258,14 @@ public: } } while (true); // turn winding into contourWinding - int spanWinding = base->spanSign(angle->start(), angle->end()); - if (spanWinding * winding < 0) { + int spanWinding = base->spanSign(angle); + bool inner = useInnerWinding(winding + spanWinding, winding); + #if DEBUG_WINDING + SkDebugf("%s --- spanWinding=%d winding=%d sign=%d inner=%d outside=%d result=%d\n", __FUNCTION__, + spanWinding, winding, angle->sign(), inner, base->spanOutside(angle->start(), angle->end()), + inner ? winding + spanWinding : winding); + #endif + if (inner) { winding += spanWinding; } #if DEBUG_SORT @@ -1248,7 +1273,7 @@ public: #endif int nextIndex = firstIndex + 1; int lastIndex = firstIndex != 0 ? firstIndex : angleCount; - winding -= base->windBump(angle); + winding -= base->spanSign(angle); do { if (nextIndex == angleCount) { nextIndex = 0; @@ -1256,12 +1281,13 @@ public: angle = sorted[nextIndex]; Segment* segment = angle->segment(); int maxWinding = winding; - winding -= segment->windBump(angle); + winding -= segment->spanSign(angle); if (segment->windSum(angle) == SK_MinS32) { - if (abs(maxWinding) < abs(winding) || maxWinding * winding < 0) { + bool inside = useInnerWinding(maxWinding, winding); + if (inside) { maxWinding = winding; } - segment->markAndChaseWinding(angle, maxWinding); + segment->markAndChaseWinding(angle, maxWinding, !inside); } } while (++nextIndex != lastIndex); return windSum(SkMin32(startIndex, endIndex)); @@ -1396,8 +1422,8 @@ public: SkDebugf("%s winding=%d spanWinding=%d outerWinding=%d innerWinding=%d\n", __FUNCTION__, winding, spanWinding, outerWinding, innerWinding); #endif - if (abs(outerWinding) < abs(innerWinding) - || outerWinding * innerWinding < 0) { + bool inside = useInnerWinding(outerWinding, innerWinding); + if (inside) { outerWinding = innerWinding; } SkASSERT(startIndex != endIndex); @@ -1415,7 +1441,7 @@ public: #if DEBUG_WINDING SkDebugf("%s simple\n", __FUNCTION__); #endif - markDone(SkMin32(startIndex, endIndex), outerWinding); + markDone(SkMin32(startIndex, endIndex), outerWinding, !inside); other = endSpan->fOther; nextStart = endSpan->fOtherIndex; double startT = other->fTs[nextStart].fT; @@ -1444,7 +1470,7 @@ public: #if DEBUG_WINDING SkDebugf("%s sign=%d\n", __FUNCTION__, sorted[firstIndex]->sign()); #endif - int sumWinding = winding - windBump(sorted[firstIndex]); + int sumWinding = winding - spanSign(sorted[firstIndex]); int nextIndex = firstIndex + 1; int lastIndex = firstIndex != 0 ? firstIndex : angleCount; const Angle* foundAngle = NULL; @@ -1461,7 +1487,7 @@ public: const Angle* nextAngle = sorted[nextIndex]; int maxWinding = sumWinding; nextSegment = nextAngle->segment(); - sumWinding -= nextSegment->windBump(nextAngle); + sumWinding -= nextSegment->spanSign(nextAngle); SkASSERT(abs(sumWinding) <= gDebugMaxWindSum); #if DEBUG_WINDING SkDebugf("%s maxWinding=%d sumWinding=%d sign=%d\n", __FUNCTION__, @@ -1476,9 +1502,10 @@ public: } if (!sumWinding) { if (!active) { - markDone(SkMin32(startIndex, endIndex), outerWinding); + markDone(SkMin32(startIndex, endIndex), outerWinding, !inside); + // FIXME: seems like a bug that this isn't calling userInnerWinding nextSegment->markWinding(SkMin32(nextAngle->start(), - nextAngle->end()), maxWinding); + nextAngle->end()), maxWinding, true); #if DEBUG_WINDING SkDebugf("%s inactive\n", __FUNCTION__); #endif @@ -1534,15 +1561,15 @@ public: // as done, record the winding value, and mark connected unambiguous // segments as well. if (nextSegment->windSum(nextAngle) == SK_MinS32) { - if (abs(maxWinding) < abs(sumWinding) - || maxWinding * sumWinding < 0) { + bool inside = useInnerWinding(maxWinding, sumWinding); + if (inside) { maxWinding = sumWinding; } Span* last; if (foundAngle) { - last = nextSegment->markAndChaseWinding(nextAngle, maxWinding); + last = nextSegment->markAndChaseWinding(nextAngle, maxWinding, !inside); } else { - last = nextSegment->markAndChaseDone(nextAngle, maxWinding); + last = nextSegment->markAndChaseDone(nextAngle, maxWinding, !inside); } if (last) { *chase.append() = last; @@ -1550,7 +1577,7 @@ public: } } while (++nextIndex != lastIndex); SkASSERT(sorted[firstIndex]->segment() == this); - markDone(SkMin32(startIndex, endIndex), outerWinding); + markDone(SkMin32(startIndex, endIndex), outerWinding, !inside); if (!foundAngle) { return NULL; } @@ -1755,17 +1782,6 @@ public: return leftSegment; } - bool firstBump(const Angle* angle, int sumWinding) const { - int winding = spanSign(angle->start(), angle->end()); - sumWinding -= winding; - if (sumWinding == 0) { - sumWinding = winding; - } - bool result = angle->sign() * sumWinding > 0; - SkASSERT(result == angle->firstBump(sumWinding)); - return result; - } - // FIXME: not crazy about this // when the intersections are performed, the other index is into an // incomplete array. as the array grows, the indices become incorrect @@ -1790,7 +1806,7 @@ public: } // OPTIMIZATION: uses tail recursion. Unwise? - Span* innerChaseDone(int index, int step, int winding) { + Span* innerChaseDone(int index, int step, int winding, bool outside) { int end = nextSpan(index, step); SkASSERT(end >= 0); if (multipleSpans(end)) { @@ -1800,12 +1816,12 @@ public: Segment* other = endSpan.fOther; index = endSpan.fOtherIndex; int otherEnd = other->nextSpan(index, step); - Span* last = other->innerChaseDone(index, step, winding); - other->markDone(SkMin32(index, otherEnd), winding); + Span* last = other->innerChaseDone(index, step, winding, outside); + other->markDone(SkMin32(index, otherEnd), winding, outside); return last; } - Span* innerChaseWinding(int index, int step, int winding) { + Span* innerChaseWinding(int index, int step, int winding, bool outside) { int end = nextSpan(index, step); SkASSERT(end >= 0); if (multipleSpans(end)) { @@ -1820,8 +1836,8 @@ public: SkASSERT(other->fTs[min].fWindSum == winding); return NULL; } - Span* last = other->innerChaseWinding(index, step, winding); - other->markWinding(min, winding); + Span* last = other->innerChaseWinding(index, step, winding, outside); + other->markWinding(min, winding, outside); return last; } @@ -1898,22 +1914,22 @@ public: // this span is excluded by the winding rule -- chase the ends // as long as they are unambiguous to mark connections as done // and give them the same winding value - Span* markAndChaseDone(const Angle* angle, int winding) { + Span* markAndChaseDone(const Angle* angle, int winding, bool outside) { int index = angle->start(); int endIndex = angle->end(); int step = SkSign32(endIndex - index); - Span* last = innerChaseDone(index, step, winding); - markDone(SkMin32(index, endIndex), winding); + Span* last = innerChaseDone(index, step, winding, outside); + markDone(SkMin32(index, endIndex), winding, outside); return last; } - Span* markAndChaseWinding(const Angle* angle, int winding) { + Span* markAndChaseWinding(const Angle* angle, int winding, bool outside) { int index = angle->start(); int endIndex = angle->end(); int min = SkMin32(index, endIndex); int step = SkSign32(endIndex - index); - Span* last = innerChaseWinding(index, step, winding); - markWinding(min, winding); + Span* last = innerChaseWinding(index, step, winding, outside); + markWinding(min, winding, outside); return last; } @@ -1922,7 +1938,7 @@ public: // wastes time, it shouldn't do any more than spin through the T spans. // OPTIMIZATION: abort on first done found (assuming that this code is // always called to mark segments done). - void markDone(int index, int winding) { + void markDone(int index, int winding, bool outside) { // SkASSERT(!done()); double referenceT = fTs[index].fT; int lesser = index; @@ -1938,6 +1954,7 @@ public: SkASSERT(span.fWindSum == SK_MinS32 || span.fWindSum == winding); SkASSERT(abs(winding) <= gDebugMaxWindSum); span.fWindSum = winding; + span.fOutside = outside; fDoneSpans++; } do { @@ -1953,11 +1970,12 @@ public: SkASSERT(span.fWindSum == SK_MinS32 || span.fWindSum == winding); SkASSERT(abs(winding) <= gDebugMaxWindSum); span.fWindSum = winding; + span.fOutside = outside; fDoneSpans++; } while (++index < fTs.count() && fTs[index].fT - referenceT < FLT_EPSILON); } - void markWinding(int index, int winding) { + void markWinding(int index, int winding, bool outside) { // SkASSERT(!done()); double referenceT = fTs[index].fT; int lesser = index; @@ -1967,12 +1985,13 @@ public: continue; } // SkASSERT(span.fWindValue == 1 || winding == 0); - SkASSERT(span.fWindSum == SK_MinS32 || span.fWindSum == winding); #if DEBUG_MARK_DONE debugShowNewWinding(__FUNCTION__, span, winding); #endif + SkASSERT(span.fWindSum == SK_MinS32 || span.fWindSum == winding); SkASSERT(abs(winding) <= gDebugMaxWindSum); span.fWindSum = winding; + span.fOutside = outside; } do { Span& span = fTs[index]; @@ -1987,10 +2006,11 @@ public: #endif SkASSERT(abs(winding) <= gDebugMaxWindSum); span.fWindSum = winding; + span.fOutside = outside; } while (++index < fTs.count() && fTs[index].fT - referenceT < FLT_EPSILON); } - void matchWindingValue(int tIndex, double t) { + void matchWindingValue(int tIndex, double t, bool borrowWind) { int nextDoorWind = SK_MaxS32; if (tIndex > 0) { const Span& below = fTs[tIndex - 1]; @@ -2004,6 +2024,10 @@ public: nextDoorWind = above.fWindValue; } } + if (nextDoorWind == SK_MaxS32 && borrowWind && tIndex > 0 && t < 1) { + const Span& below = fTs[tIndex - 1]; + nextDoorWind = below.fWindValue; + } if (nextDoorWind != SK_MaxS32) { Span& newSpan = fTs[tIndex]; newSpan.fWindValue = nextDoorWind; @@ -2059,9 +2083,22 @@ public: return fTs[tIndex]; } + const bool spanOutside(int startIndex, int endIndex) const { + return fTs[SkMin32(startIndex, endIndex)].fOutside; + } + int spanSign(int startIndex, int endIndex) const { - return startIndex < endIndex ? -fTs[startIndex].fWindValue : + int result = startIndex < endIndex ? -fTs[startIndex].fWindValue : fTs[endIndex].fWindValue; +#if DEBUG_WIND_BUMP + SkDebugf("%s spanSign=%d\n", __FUNCTION__, result); +#endif + return result; + } + + int spanSign(const Angle* angle) const { + SkASSERT(angle->segment() == this); + return spanSign(angle->start(), angle->end()); } // OPTIMIZATION: mark as debugging only if used solely by tests @@ -2086,16 +2123,6 @@ public: return fVerb; } - int windBump(const Angle* angle) const { - SkASSERT(angle->segment() == this); - const Span& span = fTs[SkMin32(angle->start(), angle->end())]; - int result = angle->sign() * span.fWindValue; -#if DEBUG_WIND_BUMP - SkDebugf("%s bump=%d\n", __FUNCTION__, result); -#endif - return result; - } - int windSum(int tIndex) const { return fTs[tIndex].fWindSum; } @@ -2250,9 +2277,9 @@ public: SkASSERT(angles[first]->segment() == this); SkASSERT(angles.count() > 1); int lastSum = contourWinding; - int windSum = lastSum - windBump(angles[first]); + int windSum = lastSum - spanSign(angles[first]); SkDebugf("%s contourWinding=%d bump=%d\n", __FUNCTION__, - contourWinding, windBump(angles[first])); + contourWinding, spanSign(angles[first])); int index = first; bool firstTime = true; do { @@ -2265,15 +2292,15 @@ public: const Span& mSpan = segment.fTs[SkMin32(start, end)]; if (!firstTime) { lastSum = windSum; - windSum -= segment.windBump(&angle); + windSum -= segment.spanSign(&angle); } SkDebugf("%s [%d] id=%d start=%d (%1.9g,%,1.9g) end=%d (%1.9g,%,1.9g)" " sign=%d windValue=%d winding: %d->%d (max=%d) done=%d\n", __FUNCTION__, index, segment.fID, start, segment.xAtT(&sSpan), segment.yAtT(&sSpan), end, segment.xAtT(&eSpan), segment.yAtT(&eSpan), angle.sign(), mSpan.fWindValue, - lastSum, windSum, abs(lastSum) > abs(windSum) ? lastSum : - windSum, mSpan.fDone); + lastSum, windSum, useInnerWinding(lastSum, windSum) + ? windSum : lastSum, mSpan.fDone); ++index; if (index == angles.count()) { index = 0; @@ -2493,21 +2520,23 @@ public: SkASSERT(oEndT - oStartT >= FLT_EPSILON); if (winding > 0 || thisOne.cancels(other)) { // make sure startT and endT have t entries - if (thisOne.isMissing(startT) || other.isMissing(oEndT)) { - thisOne.addTPair(startT, other, oEndT); + if (startT > 0 || oEndT < 1 + || thisOne.isMissing(startT) || other.isMissing(oEndT)) { + thisOne.addTPair(startT, other, oEndT, true); } - if (thisOne.isMissing(endT) || other.isMissing(oStartT)) { - other.addTPair(oStartT, thisOne, endT); + if (oStartT > 0 || endT < 1 + || thisOne.isMissing(endT) || other.isMissing(oStartT)) { + other.addTPair(oStartT, thisOne, endT, true); } thisOne.addTCancel(startT, endT, other, oStartT, oEndT); } else { if (startT > 0 || oStartT > 0 || thisOne.isMissing(startT) || other.isMissing(oStartT)) { - thisOne.addTPair(startT, other, oStartT); + thisOne.addTPair(startT, other, oStartT, true); } if (endT < 1 || oEndT < 1 || thisOne.isMissing(endT) || other.isMissing(oEndT)) { - other.addTPair(oEndT, thisOne, endT); + other.addTPair(oEndT, thisOne, endT, true); } thisOne.addTCoincident(startT, endT, other, oStartT, oEndT); } @@ -3277,12 +3306,8 @@ static int innerContourCheck(SkTDArray& contourList, #if DEBUG_WINDING SkDebugf("%s dx=%1.9g\n", __FUNCTION__, dx); #endif - if (dx == 0) { - SkASSERT(angle); - if (test->firstBump(angle, winding)) { - winding -= test->windBump(angle); - } - } else if (winding * dx > 0) { // if same signs, result is negative + SkASSERT(dx != 0); + if (winding * dx > 0) { // if same signs, result is negative winding += dx > 0 ? -windValue : windValue; #if DEBUG_WINDING SkDebugf("%s final winding=%d\n", __FUNCTION__, winding); @@ -3379,7 +3404,7 @@ static Segment* findChase(SkTDArray& chase, int& tIndex, int& endIndex, int angleCount = sorted.count(); int lastIndex = firstIndex != 0 ? firstIndex : angleCount; angle = sorted[firstIndex]; - winding -= angle->segment()->windBump(angle); + winding -= angle->segment()->spanSign(angle); do { SkASSERT(nextIndex != firstIndex); if (nextIndex == angleCount) { @@ -3388,10 +3413,10 @@ static Segment* findChase(SkTDArray& chase, int& tIndex, int& endIndex, angle = sorted[nextIndex]; segment = angle->segment(); int maxWinding = winding; - winding -= segment->windBump(angle); + winding -= segment->spanSign(angle); #if DEBUG_SORT - SkDebugf("%s id=%d maxWinding=%d winding=%d\n", __FUNCTION__, - segment->debugID(), maxWinding, winding); + SkDebugf("%s id=%d maxWinding=%d winding=%d sign=%d\n", __FUNCTION__, + segment->debugID(), maxWinding, winding, angle->sign()); #endif tIndex = angle->start(); endIndex = angle->end(); @@ -3402,10 +3427,11 @@ static Segment* findChase(SkTDArray& chase, int& tIndex, int& endIndex, // FIXME: this be wrong. assign startWinding if edge is in // same direction. If the direction is opposite, winding to // assign is flipped sign or +/- 1? - if (abs(maxWinding) < abs(winding)) { + bool inside = useInnerWinding(maxWinding, winding); + if (inside) { maxWinding = winding; } - segment->markWinding(lesser, maxWinding); + segment->markWinding(lesser, maxWinding, !inside); #endif break; } @@ -3464,9 +3490,15 @@ static void bridge(SkTDArray& contourList, SkPath& simple) { } else { contourWinding = sumWinding; int spanWinding = current->spanSign(index, endIndex); - if (spanWinding * sumWinding > 0) { + bool inner = useInnerWinding(sumWinding - spanWinding, sumWinding); + if (inner) { contourWinding -= spanWinding; } +#if DEBUG_WINDING + SkDebugf("%s --- sumWinding=%d spanWinding=%d sign=%d inner=%d outside=%d result=%d\n", __FUNCTION__, + sumWinding, spanWinding, SkSign32(index - endIndex), + inner, current->spanOutside(index, endIndex), contourWinding); +#endif } #if DEBUG_WINDING // SkASSERT(current->debugVerifyWinding(index, endIndex, contourWinding)); @@ -3526,7 +3558,17 @@ static void bridge(SkTDArray& contourList, SkPath& simple) { int lesser = SkMin32(index, endIndex); spanWinding = current->spanSign(index, endIndex); winding = current->windSum(lesser); - if (spanWinding * winding > 0) { + bool inner = useInnerWinding(winding - spanWinding, winding); + #if DEBUG_WINDING + SkDebugf("%s --- id=%d t=%1.9g spanWinding=%d winding=%d sign=%d" + " inner=%d outside=%d result=%d\n", + __FUNCTION__, current->debugID(), current->t(lesser), + spanWinding, winding, SkSign32(index - endIndex), + useInnerWinding(winding - spanWinding, winding), + current->spanOutside(index, endIndex), + inner ? winding - spanWinding : winding); + #endif + if (inner) { winding -= spanWinding; } active = windingIsActive(winding, spanWinding); -- cgit v1.2.3