| /* |
| * Copyright 2013 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| #include "src/pathops/SkOpContour.h" |
| |
| #include "src/pathops/SkPathWriter.h" |
| |
| #include <cstring> |
| |
| void SkOpContour::toPath(SkPathWriter* path) const { |
| if (!this->count()) { |
| return; |
| } |
| const SkOpSegment* segment = &fHead; |
| do { |
| SkAssertResult(segment->addCurveTo(segment->head(), segment->tail(), path)); |
| } while ((segment = segment->next())); |
| path->finishContour(); |
| path->assemble(); |
| } |
| |
| void SkOpContour::toReversePath(SkPathWriter* path) const { |
| const SkOpSegment* segment = fTail; |
| do { |
| SkAssertResult(segment->addCurveTo(segment->tail(), segment->head(), path)); |
| } while ((segment = segment->prev())); |
| path->finishContour(); |
| path->assemble(); |
| } |
| |
| SkOpSpan* SkOpContour::undoneSpan() { |
| SkOpSegment* testSegment = &fHead; |
| do { |
| if (testSegment->done()) { |
| continue; |
| } |
| return testSegment->undoneSpan(); |
| } while ((testSegment = testSegment->next())); |
| fDone = true; |
| return nullptr; |
| } |
| |
| void SkOpContourBuilder::addConic(SkPoint pts[3], SkScalar weight) { |
| this->flush(); |
| fContour->addConic(pts, weight); |
| } |
| |
| void SkOpContourBuilder::addCubic(SkPoint pts[4]) { |
| this->flush(); |
| fContour->addCubic(pts); |
| } |
| |
| void SkOpContourBuilder::addCurve(SkPath::Verb verb, const SkPoint pts[4], SkScalar weight) { |
| if (SkPath::kLine_Verb == verb) { |
| this->addLine(pts); |
| return; |
| } |
| SkArenaAlloc* allocator = fContour->globalState()->allocator(); |
| switch (verb) { |
| case SkPath::kQuad_Verb: { |
| SkPoint* ptStorage = allocator->makeArrayDefault<SkPoint>(3); |
| memcpy(ptStorage, pts, sizeof(SkPoint) * 3); |
| this->addQuad(ptStorage); |
| } break; |
| case SkPath::kConic_Verb: { |
| SkPoint* ptStorage = allocator->makeArrayDefault<SkPoint>(3); |
| memcpy(ptStorage, pts, sizeof(SkPoint) * 3); |
| this->addConic(ptStorage, weight); |
| } break; |
| case SkPath::kCubic_Verb: { |
| SkPoint* ptStorage = allocator->makeArrayDefault<SkPoint>(4); |
| memcpy(ptStorage, pts, sizeof(SkPoint) * 4); |
| this->addCubic(ptStorage); |
| } break; |
| default: |
| SkASSERT(0); |
| } |
| } |
| |
| void SkOpContourBuilder::addLine(const SkPoint pts[2]) { |
| // if the previous line added is the exact opposite, eliminate both |
| if (fLastIsLine) { |
| if (fLastLine[0] == pts[1] && fLastLine[1] == pts[0]) { |
| fLastIsLine = false; |
| return; |
| } else { |
| flush(); |
| } |
| } |
| memcpy(fLastLine, pts, sizeof(fLastLine)); |
| fLastIsLine = true; |
| } |
| |
| void SkOpContourBuilder::addQuad(SkPoint pts[3]) { |
| this->flush(); |
| fContour->addQuad(pts); |
| } |
| |
| void SkOpContourBuilder::flush() { |
| if (!fLastIsLine) |
| return; |
| SkArenaAlloc* allocator = fContour->globalState()->allocator(); |
| SkPoint* ptStorage = allocator->makeArrayDefault<SkPoint>(2); |
| memcpy(ptStorage, fLastLine, sizeof(fLastLine)); |
| (void) fContour->addLine(ptStorage); |
| fLastIsLine = false; |
| } |