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1 /* | 1 /* |
2 * Copyright 2012 Google Inc. | 2 * Copyright 2012 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 #include "SkOpCoincidence.h" | 7 #include "SkOpCoincidence.h" |
8 #include "SkOpContour.h" | 8 #include "SkOpContour.h" |
9 #include "SkOpSegment.h" | 9 #include "SkOpSegment.h" |
10 #include "SkPathWriter.h" | 10 #include "SkPathWriter.h" |
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244 } while ((test = test->upCast()->next())); | 244 } while ((test = test->upCast()->next())); |
245 foundMatch: | 245 foundMatch: |
246 return opp && !test->contains(opp) ? nullptr : testPtT; | 246 return opp && !test->contains(opp) ? nullptr : testPtT; |
247 } | 247 } |
248 | 248 |
249 // break the span so that the coincident part does not change the angle of the r
emainder | 249 // break the span so that the coincident part does not change the angle of the r
emainder |
250 bool SkOpSegment::addExpanded(double newT, const SkOpSpanBase* test, bool* start
Over) { | 250 bool SkOpSegment::addExpanded(double newT, const SkOpSpanBase* test, bool* start
Over) { |
251 if (this->contains(newT)) { | 251 if (this->contains(newT)) { |
252 return true; | 252 return true; |
253 } | 253 } |
254 SkOpPtT* newPtT = this->addT(newT, startOver); | 254 this->globalState()->resetAllocatedOpSpan(); |
| 255 SkOpPtT* newPtT = this->addT(newT); |
| 256 *startOver |= this->globalState()->allocatedOpSpan(); |
255 if (!newPtT) { | 257 if (!newPtT) { |
256 return false; | 258 return false; |
257 } | 259 } |
258 newPtT->fPt = this->ptAtT(newT); | 260 newPtT->fPt = this->ptAtT(newT); |
259 // const cast away to change linked list; pt/t values stays unchanged | 261 // const cast away to change linked list; pt/t values stays unchanged |
260 SkOpSpanBase* writableTest = const_cast<SkOpSpanBase*>(test); | 262 SkOpPtT* oppPrev = test->ptT()->oppPrev(newPtT); |
261 if (writableTest->ptT()->addOpp(newPtT)) { | 263 if (oppPrev) { |
| 264 SkOpSpanBase* writableTest = const_cast<SkOpSpanBase*>(test); |
| 265 writableTest->ptT()->addOpp(newPtT, oppPrev); |
262 writableTest->checkForCollapsedCoincidence(); | 266 writableTest->checkForCollapsedCoincidence(); |
263 } | 267 } |
264 return true; | 268 return true; |
265 } | 269 } |
266 | 270 |
267 // Please keep this in sync with debugAddT() | 271 // Please keep this in sync with debugAddT() |
268 SkOpPtT* SkOpSegment::addT(double t, bool* allocated) { | 272 SkOpPtT* SkOpSegment::addT(double t) { |
269 debugValidate(); | 273 debugValidate(); |
270 SkPoint pt = this->ptAtT(t); | 274 SkPoint pt = this->ptAtT(t); |
271 SkOpSpanBase* span = &fHead; | 275 SkOpSpanBase* spanBase = &fHead; |
272 do { | 276 do { |
273 SkOpPtT* result = span->ptT(); | 277 SkOpPtT* result = spanBase->ptT(); |
274 SkOpPtT* loop; | 278 if (t == result->fT || this->match(result, this, t, pt)) { |
275 bool duplicatePt; | 279 spanBase->bumpSpanAdds(); |
276 if (t == result->fT) { | |
277 goto bumpSpan; | |
278 } | |
279 if (this->match(result, this, t, pt)) { | |
280 // see if any existing alias matches segment, pt, and t | |
281 loop = result->next(); | |
282 duplicatePt = false; | |
283 while (loop != result) { | |
284 bool ptMatch = loop->fPt == pt; | |
285 if (loop->segment() == this && loop->fT == t && ptMatch) { | |
286 goto bumpSpan; | |
287 } | |
288 duplicatePt |= ptMatch; | |
289 loop = loop->next(); | |
290 } | |
291 bumpSpan: | |
292 span->bumpSpanAdds(); | |
293 return result; | 280 return result; |
294 } | 281 } |
295 if (t < result->fT) { | 282 if (t < result->fT) { |
296 SkOpSpan* prev = result->span()->prev(); | 283 SkOpSpan* prev = result->span()->prev(); |
297 if (!prev) { | 284 FAIL_WITH_NULL_IF(!prev); |
298 return nullptr; | 285 // marks in global state that new op span has been allocated |
299 } | 286 SkOpSpan* span = this->insert(prev); |
300 SkOpSpan* span = insert(prev); | |
301 span->init(this, prev, t, pt); | 287 span->init(this, prev, t, pt); |
302 this->debugValidate(); | 288 this->debugValidate(); |
303 #if DEBUG_ADD_T | 289 #if DEBUG_ADD_T |
304 SkDebugf("%s insert t=%1.9g segID=%d spanID=%d\n", __FUNCTION__, t, | 290 SkDebugf("%s insert t=%1.9g segID=%d spanID=%d\n", __FUNCTION__, t, |
305 span->segment()->debugID(), span->debugID()); | 291 span->segment()->debugID(), span->debugID()); |
306 #endif | 292 #endif |
307 span->bumpSpanAdds(); | 293 span->bumpSpanAdds(); |
308 if (allocated) { | |
309 *allocated = true; | |
310 } | |
311 return span->ptT(); | 294 return span->ptT(); |
312 } | 295 } |
313 if (span == &fTail) { | 296 FAIL_WITH_NULL_IF(spanBase == &fTail); |
314 return nullptr; | 297 } while ((spanBase = spanBase->upCast()->next())); |
315 } | |
316 } while ((span = span->upCast()->next())); | |
317 SkASSERT(0); | 298 SkASSERT(0); |
318 return nullptr; | 299 return nullptr; // we never get here, but need this to satisfy compiler |
319 } | 300 } |
320 | 301 |
321 void SkOpSegment::calcAngles() { | 302 void SkOpSegment::calcAngles() { |
322 bool activePrior = !fHead.isCanceled(); | 303 bool activePrior = !fHead.isCanceled(); |
323 if (activePrior && !fHead.simple()) { | 304 if (activePrior && !fHead.simple()) { |
324 addStartSpan(); | 305 addStartSpan(); |
325 } | 306 } |
326 SkOpSpan* prior = &fHead; | 307 SkOpSpan* prior = &fHead; |
327 SkOpSpanBase* spanBase = fHead.next(); | 308 SkOpSpanBase* spanBase = fHead.next(); |
328 while (spanBase != &fTail) { | 309 while (spanBase != &fTail) { |
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1785 int absOut = SkTAbs(outerWinding); | 1766 int absOut = SkTAbs(outerWinding); |
1786 int absIn = SkTAbs(innerWinding); | 1767 int absIn = SkTAbs(innerWinding); |
1787 bool result = absOut == absIn ? outerWinding < 0 : absOut < absIn; | 1768 bool result = absOut == absIn ? outerWinding < 0 : absOut < absIn; |
1788 return result; | 1769 return result; |
1789 } | 1770 } |
1790 | 1771 |
1791 int SkOpSegment::windSum(const SkOpAngle* angle) const { | 1772 int SkOpSegment::windSum(const SkOpAngle* angle) const { |
1792 const SkOpSpan* minSpan = angle->start()->starter(angle->end()); | 1773 const SkOpSpan* minSpan = angle->start()->starter(angle->end()); |
1793 return minSpan->windSum(); | 1774 return minSpan->windSum(); |
1794 } | 1775 } |
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