1 /* 2 * Copyright 2013 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 #include "SkOpContour.h" 8 #include "SkOpTAllocator.h" 9 #include "SkPathWriter.h" 10 #include "SkReduceOrder.h" 11 #include "SkTSort.h" 12 13 SkOpSegment* SkOpContour::addCurve(SkPath::Verb verb, const SkPoint pts[4], 14 SkChunkAlloc* allocator) { 15 switch (verb) { 16 case SkPath::kLine_Verb: { 17 SkPoint* ptStorage = SkOpTAllocator<SkPoint>::AllocateArray(allocator, 2); 18 memcpy(ptStorage, pts, sizeof(SkPoint) * 2); 19 return appendSegment(allocator).addLine(ptStorage, this); 20 } break; 21 case SkPath::kQuad_Verb: { 22 SkPoint* ptStorage = SkOpTAllocator<SkPoint>::AllocateArray(allocator, 3); 23 memcpy(ptStorage, pts, sizeof(SkPoint) * 3); 24 return appendSegment(allocator).addQuad(ptStorage, this); 25 } break; 26 case SkPath::kConic_Verb: { 27 SkASSERT(0); // the original curve is a cubic, which will never reduce to a conic 28 } break; 29 case SkPath::kCubic_Verb: { 30 SkPoint* ptStorage = SkOpTAllocator<SkPoint>::AllocateArray(allocator, 4); 31 memcpy(ptStorage, pts, sizeof(SkPoint) * 4); 32 return appendSegment(allocator).addCubic(ptStorage, this); 33 } break; 34 default: 35 SkASSERT(0); 36 } 37 return NULL; 38 } 39 40 void SkOpContour::toPath(SkPathWriter* path) const { 41 const SkPoint& pt = fHead.pts()[0]; 42 path->deferredMove(pt); 43 const SkOpSegment* segment = &fHead; 44 do { 45 segment->addCurveTo(segment->head(), segment->tail(), path, true); 46 } while ((segment = segment->next())); 47 path->close(); 48 } 49 50 SkOpSegment* SkOpContour::undoneSegment(SkOpSpanBase** startPtr, SkOpSpanBase** endPtr) { 51 SkOpSegment* segment = &fHead; 52 do { 53 if (segment->done()) { 54 continue; 55 } 56 segment->undoneSpan(startPtr, endPtr); 57 return segment; 58 } while ((segment = segment->next())); 59 return NULL; 60 } 61
