// FIXME : add this as a member of SkPath
void Simplify(const SkPath& path, SkPath* result) {
#if DEBUG_SORT || DEBUG_SWAP_TOP
gDebugSortCount = gDebugSortCountDefault;
#endif
// returns 1 for evenodd, -1 for winding, regardless of inverse-ness
result->reset();
result->setFillType(SkPath::kEvenOdd_FillType);
SkPathWriter simple(*result);
// turn path into list of segments
SkTArray<SkOpContour> contours;
SkOpEdgeBuilder builder(path, contours);
builder.finish();
SkTDArray<SkOpContour*> contourList;
MakeContourList(contours, contourList, false, false);
SkOpContour** currentPtr = contourList.begin();
if (!currentPtr) {
return;
}
SkOpContour** listEnd = contourList.end();
// find all intersections between segments
do {
SkOpContour** nextPtr = currentPtr;
SkOpContour* current = *currentPtr++;
if (current->containsCubics()) {
AddSelfIntersectTs(current);
}
SkOpContour* next;
do {
next = *nextPtr++;
} while (AddIntersectTs(current, next) && nextPtr != listEnd);
} while (currentPtr != listEnd);
// eat through coincident edges
CoincidenceCheck(&contourList, 0);
FixOtherTIndex(&contourList);
SortSegments(&contourList);
#if DEBUG_ACTIVE_SPANS
DebugShowActiveSpans(contourList);
#endif
// construct closed contours
if (builder.xorMask() == kWinding_PathOpsMask ? bridgeWinding(contourList, &simple)
: !bridgeXor(contourList, &simple))
{ // if some edges could not be resolved, assemble remaining fragments
SkPath temp;
temp.setFillType(SkPath::kEvenOdd_FillType);
SkPathWriter assembled(temp);
Assemble(simple, &assembled);
*result = *assembled.nativePath();
}
}
bool Op(const SkPath& one, const SkPath& two, SkPathOp op, SkPath* result) {
#if DEBUG_SHOW_TEST_NAME
char* debugName = DEBUG_FILENAME_STRING;
if (debugName && debugName[0]) {
SkPathOpsDebug::BumpTestName(debugName);
SkPathOpsDebug::ShowPath(one, two, op, debugName);
}
#endif
op = gOpInverse[op][one.isInverseFillType()][two.isInverseFillType()];
SkPath::FillType fillType = gOutInverse[op][one.isInverseFillType()][two.isInverseFillType()]
? SkPath::kInverseEvenOdd_FillType : SkPath::kEvenOdd_FillType;
const SkPath* minuend = &one;
const SkPath* subtrahend = &two;
if (op == kReverseDifference_PathOp) {
minuend = &two;
subtrahend = &one;
op = kDifference_PathOp;
}
#if DEBUG_SORT || DEBUG_SWAP_TOP
SkPathOpsDebug::gSortCount = SkPathOpsDebug::gSortCountDefault;
#endif
// turn path into list of segments
SkTArray<SkOpContour> contours;
// FIXME: add self-intersecting cubics' T values to segment
SkOpEdgeBuilder builder(*minuend, contours);
const int xorMask = builder.xorMask();
builder.addOperand(*subtrahend);
if (!builder.finish()) {
return false;
}
result->reset();
result->setFillType(fillType);
const int xorOpMask = builder.xorMask();
SkTArray<SkOpContour*, true> contourList;
MakeContourList(contours, contourList, xorMask == kEvenOdd_PathOpsMask,
xorOpMask == kEvenOdd_PathOpsMask);
SkOpContour** currentPtr = contourList.begin();
if (!currentPtr) {
return true;
}
SkOpContour** listEnd = contourList.end();
// find all intersections between segments
do {
SkOpContour** nextPtr = currentPtr;
SkOpContour* current = *currentPtr++;
if (current->containsCubics()) {
AddSelfIntersectTs(current);
}
SkOpContour* next;
do {
next = *nextPtr++;
} while (AddIntersectTs(current, next) && nextPtr != listEnd);
} while (currentPtr != listEnd);
// eat through coincident edges
int total = 0;
int index;
for (index = 0; index < contourList.count(); ++index) {
total += contourList[index]->segments().count();
}
HandleCoincidence(&contourList, total);
// construct closed contours
SkPathWriter wrapper(*result);
bridgeOp(contourList, op, xorMask, xorOpMask, &wrapper);
{ // if some edges could not be resolved, assemble remaining fragments
SkPath temp;
temp.setFillType(fillType);
SkPathWriter assembled(temp);
Assemble(wrapper, &assembled);
*result = *assembled.nativePath();
result->setFillType(fillType);
}
return true;
}
