int SkIntersections::intersect(const SkDCubic& cubic1, const SkDCubic& cubic2) {
SkTSect<SkDCubic, SkDCubic> sect1(cubic1
SkDEBUGPARAMS(globalState()) PATH_OPS_DEBUG_T_SECT_PARAMS(1));
SkTSect<SkDCubic, SkDCubic> sect2(cubic2
SkDEBUGPARAMS(globalState()) PATH_OPS_DEBUG_T_SECT_PARAMS(2));
SkTSect<SkDCubic, SkDCubic>::BinarySearch(§1, §2, this);
return used();
}
int SkIntersections::intersect(const SkDQuad& quad1, const SkDQuad& quad2) {
SkTSect<SkDQuad, SkDQuad> sect1(quad1
SkDEBUGPARAMS(globalState()) PATH_OPS_DEBUG_T_SECT_PARAMS(1));
SkTSect<SkDQuad, SkDQuad> sect2(quad2
SkDEBUGPARAMS(globalState()) PATH_OPS_DEBUG_T_SECT_PARAMS(2));
SkTSect<SkDQuad, SkDQuad>::BinarySearch(§1, §2, this);
return used();
}
bool ScriptArguments::getFirstArgumentAsString(String& result)
{
if (!argumentCount())
return false;
if (!globalState()) {
ASSERT_NOT_REACHED();
return false;
}
result = argumentAt(0).toString(globalState());
return true;
}
bool TightBounds(const SkPath& path, SkRect* result) {
SkChunkAlloc allocator(4096); // FIXME: constant-ize, tune
SkOpContour contour;
SkOpContourHead* contourList = static_cast<SkOpContourHead*>(&contour);
SkOpGlobalState globalState(contourList, &allocator SkDEBUGPARAMS(false)
SkDEBUGPARAMS(nullptr));
// turn path into list of segments
SkScalar scaleFactor = ScaleFactor(path);
SkPath scaledPath;
const SkPath* workingPath;
if (scaleFactor > SK_Scalar1) {
ScalePath(path, 1.f / scaleFactor, &scaledPath);
workingPath = &scaledPath;
} else {
workingPath = &path;
}
SkOpEdgeBuilder builder(*workingPath, &contour, &globalState);
if (!builder.finish()) {
return false;
}
if (!SortContourList(&contourList, false, false)) {
result->setEmpty();
return true;
}
SkOpContour* current = contourList;
SkPathOpsBounds bounds = current->bounds();
while ((current = current->next())) {
bounds.add(current->bounds());
}
*result = bounds;
return true;
}
void FixWinding(SkPath* path) {
SkPath::FillType fillType = path->getFillType();
if (fillType == SkPath::kInverseEvenOdd_FillType) {
fillType = SkPath::kInverseWinding_FillType;
} else if (fillType == SkPath::kEvenOdd_FillType) {
fillType = SkPath::kWinding_FillType;
}
SkPathPriv::FirstDirection dir;
if (one_contour(*path) && SkPathPriv::CheapComputeFirstDirection(*path, &dir)) {
if (dir != SkPathPriv::kCCW_FirstDirection) {
SkPath temp;
temp.reverseAddPath(*path);
*path = temp;
}
path->setFillType(fillType);
return;
}
SkChunkAlloc allocator(4096);
SkOpContourHead contourHead;
SkOpGlobalState globalState(nullptr, &contourHead SkDEBUGPARAMS(nullptr));
SkOpEdgeBuilder builder(*path, &contourHead, &allocator, &globalState);
builder.finish(&allocator);
SkASSERT(contourHead.next());
contourHead.resetReverse();
bool writePath = false;
SkOpSpan* topSpan;
globalState.setPhase(SkOpGlobalState::kFixWinding);
while ((topSpan = FindSortableTop(&contourHead))) {
SkOpSegment* topSegment = topSpan->segment();
SkOpContour* topContour = topSegment->contour();
SkASSERT(topContour->isCcw() >= 0);
#if DEBUG_WINDING
SkDebugf("%s id=%d nested=%d ccw=%d\n", __FUNCTION__,
topSegment->debugID(), globalState.nested(), topContour->isCcw());
#endif
if ((globalState.nested() & 1) != SkToBool(topContour->isCcw())) {
topContour->setReverse();
writePath = true;
}
topContour->markDone();
globalState.clearNested();
}
if (!writePath) {
path->setFillType(fillType);
return;
}
SkPath empty;
SkPathWriter woundPath(empty);
SkOpContour* test = &contourHead;
do {
if (test->reversed()) {
test->toReversePath(&woundPath);
} else {
test->toPath(&woundPath);
}
} while ((test = test->next()));
*path = *woundPath.nativePath();
path->setFillType(fillType);
}
bool ScriptArguments::getFirstArgumentAsString(String& result, bool checkForNullOrUndefined)
{
if (!argumentCount())
return false;
const ScriptValue& value = argumentAt(0);
if (checkForNullOrUndefined && (value.isNull() || value.isUndefined()))
return false;
if (!globalState()) {
ASSERT_NOT_REACHED();
return false;
}
result = value.toString(globalState());
return true;
}
void SkOpSpanBase::initBase(SkOpSegment* segment, SkOpSpan* prev, double t, const SkPoint& pt) {
fSegment = segment;
fPtT.init(this, t, pt, false);
fCoinEnd = this;
fFromAngle = nullptr;
fPrev = prev;
fSpanAdds = 0;
fAligned = true;
fChased = false;
SkDEBUGCODE(fCount = 1);
SkDEBUGCODE(fID = globalState()->nextSpanID());
SkDEBUGCODE(fDebugDeleted = false);
}
bool ScriptArguments::isEqual(ScriptArguments* other) const
{
if (!other)
return false;
if (m_arguments.size() != other->m_arguments.size())
return false;
if (!globalState() && m_arguments.size())
return false;
for (size_t i = 0; i < m_arguments.size(); ++i) {
if (!m_arguments[i].isEqual(other->globalState(), other->m_arguments[i]))
return false;
}
return true;
}
bool TightBounds(const SkPath& path, SkRect* result) {
SkChunkAlloc allocator(4096); // FIXME: constant-ize, tune
SkOpContour contour;
SkOpContourHead* contourList = static_cast<SkOpContourHead*>(&contour);
SkOpGlobalState globalState(nullptr, contourList SkDEBUGPARAMS(nullptr));
// turn path into list of segments
SkOpEdgeBuilder builder(path, &contour, &allocator, &globalState);
if (!builder.finish(&allocator)) {
return false;
}
if (!SortContourList(&contourList, false, false)) {
result->setEmpty();
return true;
}
SkOpContour* current = contourList;
SkPathOpsBounds bounds = current->bounds();
while ((current = current->next())) {
bounds.add(current->bounds());
}
*result = bounds;
return true;
}
/*
check start and end of each contour
if not the same, record them
match them up
connect closest
reassemble contour pieces into new path
*/
void Assemble(const SkPathWriter& path, SkPathWriter* simple) {
SkChunkAlloc allocator(4096); // FIXME: constant-ize, tune
SkOpContourHead contour;
SkOpGlobalState globalState(nullptr, &contour SkDEBUGPARAMS(nullptr));
#if DEBUG_SHOW_TEST_NAME
SkDebugf("</div>\n");
#endif
#if DEBUG_PATH_CONSTRUCTION
SkDebugf("%s\n", __FUNCTION__);
#endif
SkOpEdgeBuilder builder(path, &contour, &allocator, &globalState);
builder.finish(&allocator);
SkTDArray<const SkOpContour* > runs; // indices of partial contours
const SkOpContour* eContour = builder.head();
do {
if (!eContour->count()) {
continue;
}
const SkPoint& eStart = eContour->start();
const SkPoint& eEnd = eContour->end();
#if DEBUG_ASSEMBLE
SkDebugf("%s contour", __FUNCTION__);
if (!SkDPoint::ApproximatelyEqual(eStart, eEnd)) {
SkDebugf("[%d]", runs.count());
} else {
SkDebugf(" ");
}
SkDebugf(" start=(%1.9g,%1.9g) end=(%1.9g,%1.9g)\n",
eStart.fX, eStart.fY, eEnd.fX, eEnd.fY);
#endif
if (SkDPoint::ApproximatelyEqual(eStart, eEnd)) {
eContour->toPath(simple);
continue;
}
*runs.append() = eContour;
} while ((eContour = eContour->next()));
int count = runs.count();
if (count == 0) {
return;
}
SkTDArray<int> sLink, eLink;
sLink.append(count);
eLink.append(count);
int rIndex, iIndex;
for (rIndex = 0; rIndex < count; ++rIndex) {
sLink[rIndex] = eLink[rIndex] = SK_MaxS32;
}
const int ends = count * 2; // all starts and ends
const int entries = (ends - 1) * count; // folded triangle : n * (n - 1) / 2
SkTDArray<double> distances;
distances.append(entries);
for (rIndex = 0; rIndex < ends - 1; ++rIndex) {
const SkOpContour* oContour = runs[rIndex >> 1];
const SkPoint& oPt = rIndex & 1 ? oContour->end() : oContour->start();
const int row = rIndex < count - 1 ? rIndex * ends : (ends - rIndex - 2)
* ends - rIndex - 1;
for (iIndex = rIndex + 1; iIndex < ends; ++iIndex) {
const SkOpContour* iContour = runs[iIndex >> 1];
const SkPoint& iPt = iIndex & 1 ? iContour->end() : iContour->start();
double dx = iPt.fX - oPt.fX;
double dy = iPt.fY - oPt.fY;
double dist = dx * dx + dy * dy;
distances[row + iIndex] = dist; // oStart distance from iStart
}
}
SkTDArray<int> sortedDist;
sortedDist.append(entries);
for (rIndex = 0; rIndex < entries; ++rIndex) {
sortedDist[rIndex] = rIndex;
}
SkTQSort<int>(sortedDist.begin(), sortedDist.end() - 1, DistanceLessThan(distances.begin()));
int remaining = count; // number of start/end pairs
for (rIndex = 0; rIndex < entries; ++rIndex) {
int pair = sortedDist[rIndex];
int row = pair / ends;
int col = pair - row * ends;
int thingOne = row < col ? row : ends - row - 2;
int ndxOne = thingOne >> 1;
bool endOne = thingOne & 1;
int* linkOne = endOne ? eLink.begin() : sLink.begin();
if (linkOne[ndxOne] != SK_MaxS32) {
continue;
}
int thingTwo = row < col ? col : ends - row + col - 1;
int ndxTwo = thingTwo >> 1;
bool endTwo = thingTwo & 1;
int* linkTwo = endTwo ? eLink.begin() : sLink.begin();
if (linkTwo[ndxTwo] != SK_MaxS32) {
continue;
}
SkASSERT(&linkOne[ndxOne] != &linkTwo[ndxTwo]);
bool flip = endOne == endTwo;
linkOne[ndxOne] = flip ? ~ndxTwo : ndxTwo;
linkTwo[ndxTwo] = flip ? ~ndxOne : ndxOne;
if (!--remaining) {
break;
}
}
SkASSERT(!remaining);
#if DEBUG_ASSEMBLE
for (rIndex = 0; rIndex < count; ++rIndex) {
int s = sLink[rIndex];
int e = eLink[rIndex];
SkDebugf("%s %c%d <- s%d - e%d -> %c%d\n", __FUNCTION__, s < 0 ? 's' : 'e',
s < 0 ? ~s : s, rIndex, rIndex, e < 0 ? 'e' : 's', e < 0 ? ~e : e);
}
#endif
rIndex = 0;
do {
bool forward = true;
bool first = true;
int sIndex = sLink[rIndex];
SkASSERT(sIndex != SK_MaxS32);
sLink[rIndex] = SK_MaxS32;
int eIndex;
if (sIndex < 0) {
eIndex = sLink[~sIndex];
sLink[~sIndex] = SK_MaxS32;
} else {
eIndex = eLink[sIndex];
eLink[sIndex] = SK_MaxS32;
}
SkASSERT(eIndex != SK_MaxS32);
#if DEBUG_ASSEMBLE
SkDebugf("%s sIndex=%c%d eIndex=%c%d\n", __FUNCTION__, sIndex < 0 ? 's' : 'e',
sIndex < 0 ? ~sIndex : sIndex, eIndex < 0 ? 's' : 'e',
eIndex < 0 ? ~eIndex : eIndex);
#endif
do {
const SkOpContour* contour = runs[rIndex];
if (first) {
first = false;
const SkPoint* startPtr = &contour->start();
simple->deferredMove(startPtr[0]);
}
if (forward) {
contour->toPartialForward(simple);
} else {
contour->toPartialBackward(simple);
}
#if DEBUG_ASSEMBLE
SkDebugf("%s rIndex=%d eIndex=%s%d close=%d\n", __FUNCTION__, rIndex,
eIndex < 0 ? "~" : "", eIndex < 0 ? ~eIndex : eIndex,
sIndex == ((rIndex != eIndex) ^ forward ? eIndex : ~eIndex));
#endif
if (sIndex == ((rIndex != eIndex) ^ forward ? eIndex : ~eIndex)) {
simple->close();
break;
}
if (forward) {
eIndex = eLink[rIndex];
SkASSERT(eIndex != SK_MaxS32);
eLink[rIndex] = SK_MaxS32;
if (eIndex >= 0) {
SkASSERT(sLink[eIndex] == rIndex);
sLink[eIndex] = SK_MaxS32;
} else {
SkASSERT(eLink[~eIndex] == ~rIndex);
eLink[~eIndex] = SK_MaxS32;
}
} else {
eIndex = sLink[rIndex];
SkASSERT(eIndex != SK_MaxS32);
sLink[rIndex] = SK_MaxS32;
if (eIndex >= 0) {
SkASSERT(eLink[eIndex] == rIndex);
eLink[eIndex] = SK_MaxS32;
} else {
SkASSERT(sLink[~eIndex] == ~rIndex);
sLink[~eIndex] = SK_MaxS32;
}
}
rIndex = eIndex;
if (rIndex < 0) {
forward ^= 1;
rIndex = ~rIndex;
}
} while (true);
for (rIndex = 0; rIndex < count; ++rIndex) {
if (sLink[rIndex] != SK_MaxS32) {
break;
}
}
} while (rIndex < count);
#if DEBUG_ASSEMBLE
for (rIndex = 0; rIndex < count; ++rIndex) {
SkASSERT(sLink[rIndex] == SK_MaxS32);
SkASSERT(eLink[rIndex] == SK_MaxS32);
}
#endif
}
