/*
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* Copyright 2012 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkIntersectionHelper_DEFINED
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#define SkIntersectionHelper_DEFINED
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#include "SkOpContour.h"
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#include "SkOpSegment.h"
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#include "SkPath.h"
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#ifdef SK_DEBUG
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#include "SkPathOpsPoint.h"
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#endif
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class SkIntersectionHelper {
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public:
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enum SegmentType {
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kHorizontalLine_Segment = -1,
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kVerticalLine_Segment = 0,
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kLine_Segment = SkPath::kLine_Verb,
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kQuad_Segment = SkPath::kQuad_Verb,
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kConic_Segment = SkPath::kConic_Verb,
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kCubic_Segment = SkPath::kCubic_Verb,
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};
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bool advance() {
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fSegment = fSegment->next();
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return fSegment != nullptr;
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}
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SkScalar bottom() const {
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return bounds().fBottom;
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}
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const SkPathOpsBounds& bounds() const {
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return fSegment->bounds();
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}
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SkOpContour* contour() const {
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return fSegment->contour();
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}
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void init(SkOpContour* contour) {
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fSegment = contour->first();
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}
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SkScalar left() const {
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return bounds().fLeft;
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}
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const SkPoint* pts() const {
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return fSegment->pts();
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}
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SkScalar right() const {
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return bounds().fRight;
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}
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SkOpSegment* segment() const {
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return fSegment;
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}
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SegmentType segmentType() const {
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SegmentType type = (SegmentType) fSegment->verb();
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if (type != kLine_Segment) {
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return type;
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}
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if (fSegment->isHorizontal()) {
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return kHorizontalLine_Segment;
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}
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if (fSegment->isVertical()) {
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return kVerticalLine_Segment;
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}
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return kLine_Segment;
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}
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bool startAfter(const SkIntersectionHelper& after) {
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fSegment = after.fSegment->next();
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return fSegment != nullptr;
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}
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SkScalar top() const {
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return bounds().fTop;
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}
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SkScalar weight() const {
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return fSegment->weight();
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}
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SkScalar x() const {
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return bounds().fLeft;
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}
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bool xFlipped() const {
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return x() != pts()[0].fX;
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}
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SkScalar y() const {
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return bounds().fTop;
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}
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bool yFlipped() const {
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return y() != pts()[0].fY;
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}
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private:
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SkOpSegment* fSegment;
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};
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#endif
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