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