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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkDashPathPriv_DEFINED
#define SkDashPathPriv_DEFINED
#include "SkPathEffect.h"
namespace SkDashPath {
/**
* Calculates the initialDashLength, initialDashIndex, and intervalLength based on the
* inputed phase and intervals. If adjustedPhase is passed in, then the phase will be
* adjusted to be between 0 and intervalLength. The result will be stored in adjustedPhase.
* If adjustedPhase is nullptr then it is assumed phase is already between 0 and intervalLength
*
* Caller should have already used ValidDashPath to exclude invalid data.
*/
void CalcDashParameters(SkScalar phase, const SkScalar intervals[], int32_t count,
SkScalar* initialDashLength, int32_t* initialDashIndex,
SkScalar* intervalLength, SkScalar* adjustedPhase = nullptr);
bool FilterDashPath(SkPath* dst, const SkPath& src, SkStrokeRec*, const SkRect*,
const SkPathEffect::DashInfo& info);
const SkScalar kMaxDashCount = 1000000;
/** See comments for InternalFilter */
enum class StrokeRecApplication {
kDisallow,
kAllow,
};
/**
* Caller should have already used ValidDashPath to exclude invalid data. Typically, this leaves
* the strokeRec unmodified. However, for some simple shapes (e.g. a line) it may directly
* evaluate the dash and stroke to produce a stroked output path with a fill strokeRec. Passing
* true for disallowStrokeRecApplication turns this behavior off.
*/
bool InternalFilter(SkPath* dst, const SkPath& src, SkStrokeRec* rec,
const SkRect* cullRect, const SkScalar aIntervals[],
int32_t count, SkScalar initialDashLength, int32_t initialDashIndex,
SkScalar intervalLength,
StrokeRecApplication = StrokeRecApplication::kAllow);
bool ValidDashPath(SkScalar phase, const SkScalar intervals[], int32_t count);
}
#endif
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