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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 SkOpSpan_DEFINED
#define SkOpSpan_DEFINED
#include "SkPoint.h"
class SkOpSegment;
struct SkOpSpan {
enum PointMatch {
SkOpSegment* fOther;
SkPoint fPt; // computed when the curves are intersected
double fT;
double fOtherT; // value at fOther[fOtherIndex].fT
int fOtherIndex; // can't be used during intersection
int fWindSum; // accumulated from contours surrounding this one.
int fOppSum; // for binary operators: the opposite winding sum
int fWindValue; // 0 == canceled; 1 == normal; >1 == coincident
int fOppValue; // normally 0 -- when binary coincident edges combine, opp value goes here
bool fDone; // if set, this span to next higher T has been processed
bool fUnsortableStart; // set when start is part of an unsortable pair
bool fUnsortableEnd; // set when end is part of an unsortable pair
bool fSmall; // if set, consecutive points are almost equal
bool fTiny; // if set, span may still be considered once for edge following
bool fLoop; // set when a cubic loops back to this point
bool fNear; // set if point is near segment end point
#ifdef SK_DEBUG
void dump() const;