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