Inheritance diagram for SkDiscretePathEffectImpl:

Public Member Functions
	SkDiscretePathEffectImpl (SkScalar segLength, SkScalar deviation, uint32_t seedAssist)

bool	onFilterPath (SkPath dst, const SkPath &src, SkStrokeRec rec, const SkRect *, const SkMatrix &) const override

bool	computeFastBounds (SkRect *bounds) const override

void	flatten (SkWriteBuffer &buffer) const override

Factory	getFactory () const override

const char *	getTypeName () const override

Public Member Functions inherited from SkPathEffectBase
	SkPathEffectBase ()

bool	asPoints (PointData results, const SkPath &src, const SkStrokeRec &, const SkMatrix &, const SkRect cullR) const

SkFlattenable::Type	getFlattenableType () const override

virtual bool	onFilterPath (SkPath , const SkPath &, SkStrokeRec , const SkRect *, const SkMatrix &) const =0

virtual bool	onNeedsCTM () const

virtual bool	onAsPoints (PointData , const SkPath &, const SkStrokeRec &, const SkMatrix &, const SkRect ) const

virtual DashType	onAsADash (DashInfo *) const

virtual bool	computeFastBounds (SkRect *bounds) const =0

Public Member Functions inherited from SkPathEffect
DashType	asADash (DashInfo *info) const

bool	filterPath (SkPath dst, const SkPath &src, SkStrokeRec , const SkRect *cullR) const

bool	filterPath (SkPath dst, const SkPath &src, SkStrokeRec , const SkRect *cullR, const SkMatrix &ctm) const

bool	needsCTM () const

Public Member Functions inherited from SkFlattenable
	SkFlattenable ()

virtual Factory	getFactory () const =0

virtual const char *	getTypeName () const =0

virtual void	flatten (SkWriteBuffer &) const

virtual Type	getFlattenableType () const =0

sk_sp< SkData >	serialize (const SkSerialProcs *=nullptr) const

size_t	serialize (void memory, size_t memory_size, const SkSerialProcs =nullptr) const

Public Member Functions inherited from SkRefCntBase
	SkRefCntBase ()

virtual	~SkRefCntBase ()

bool	unique () const

void	ref () const

void	unref () const

Static Public Member Functions
static sk_sp< SkFlattenable >	CreateProc (SkReadBuffer &buffer)

Static Public Member Functions inherited from SkPathEffectBase
static sk_sp< SkPathEffect >	Deserialize (const void data, size_t size, const SkDeserialProcs procs=nullptr)

static void	RegisterFlattenables ()

Static Public Member Functions inherited from SkPathEffect
static sk_sp< SkPathEffect >	MakeSum (sk_sp< SkPathEffect > first, sk_sp< SkPathEffect > second)

static sk_sp< SkPathEffect >	MakeCompose (sk_sp< SkPathEffect > outer, sk_sp< SkPathEffect > inner)

static SkFlattenable::Type	GetFlattenableType ()

static sk_sp< SkPathEffect >	Deserialize (const void data, size_t size, const SkDeserialProcs procs=nullptr)

Static Public Member Functions inherited from SkFlattenable
static Factory	NameToFactory (const char name[])

static const char *	FactoryToName (Factory)

static void	Register (const char name[], Factory)

static sk_sp< SkFlattenable >	Deserialize (Type, const void data, size_t length, const SkDeserialProcs procs=nullptr)

Additional Inherited Members
Public Types inherited from SkPathEffect
enum	DashType { kNone_DashType , kDash_DashType }

Public Types inherited from SkFlattenable
enum	Type { kSkColorFilter_Type , kSkBlender_Type , kSkDrawable_Type , kSkDrawLooper_Type , kSkImageFilter_Type , kSkMaskFilter_Type , kSkPathEffect_Type , kSkShader_Type }

typedef sk_sp< SkFlattenable >(*	Factory) (SkReadBuffer &)

Detailed Description

Definition at line 79 of file SkDiscretePathEffect.cpp.

Constructor & Destructor Documentation

◆ SkDiscretePathEffectImpl()

SkDiscretePathEffectImpl::SkDiscretePathEffectImpl	(	SkScalar	segLength,
		SkScalar	deviation,
		uint32_t	seedAssist
	)

inline

Definition at line 81 of file SkDiscretePathEffect.cpp.

        : fSegLength(segLength), fPerterb(deviation), fSeedAssist(seedAssist)
    {
        SkASSERT(SkIsFinite(segLength));
        SkASSERT(SkIsFinite(deviation));
        SkASSERT(segLength > SK_ScalarNearlyZero);
    }

Member Function Documentation

◆ computeFastBounds()

bool SkDiscretePathEffectImpl::computeFastBounds ( SkRect * bounds ) const

inlineoverridevirtual

Implements SkPathEffectBase.

Definition at line 144 of file SkDiscretePathEffect.cpp.

                                                          {
        if (bounds) {
            SkScalar maxOutset = SkScalarAbs(fPerterb);
            bounds->outset(maxOutset, maxOutset);
        }
        return true;
    }

◆ CreateProc()

static sk_sp< SkFlattenable > SkDiscretePathEffectImpl::CreateProc ( SkReadBuffer & buffer )

inlinestatic

Definition at line 152 of file SkDiscretePathEffect.cpp.

                                                                 {
        SkScalar segLength = buffer.readScalar();
        SkScalar perterb = buffer.readScalar();
        uint32_t seed = buffer.readUInt();
        return SkDiscretePathEffect::Make(segLength, perterb, seed);
    }

◆ flatten()

void SkDiscretePathEffectImpl::flatten ( SkWriteBuffer & ) const

inlineoverridevirtual

Override this if your subclass needs to record data that it will need to recreate itself from its CreateProc (returned by getFactory()).

DEPRECATED public : will move to protected ... use serialize() instead

Reimplemented from SkFlattenable.

Definition at line 159 of file SkDiscretePathEffect.cpp.

                                                       {
        buffer.writeScalar(fSegLength);
        buffer.writeScalar(fPerterb);
        buffer.writeUInt(fSeedAssist);
    }

◆ getFactory()

Factory SkDiscretePathEffectImpl::getFactory ( ) const

inlineoverridevirtual

Implement this to return a factory function pointer that can be called to recreate your class given a buffer (previously written to by your override of flatten().

Implements SkFlattenable.

Definition at line 165 of file SkDiscretePathEffect.cpp.

165{ return CreateProc; }

SkDiscretePathEffectImpl::CreateProc

static sk_sp< SkFlattenable > CreateProc(SkReadBuffer &buffer)

Definition: SkDiscretePathEffect.cpp:152

◆ getTypeName()

const char * SkDiscretePathEffectImpl::getTypeName ( ) const

inlineoverridevirtual

Returns the name of the object's class.

Implements SkFlattenable.

Definition at line 166 of file SkDiscretePathEffect.cpp.

166{ return "SkDiscretePathEffect"; }

◆ onFilterPath()

bool SkDiscretePathEffectImpl::onFilterPath	(	SkPath *	,
		const SkPath &	,
		SkStrokeRec *	,
		const SkRect *	,
		const SkMatrix &
	)		const

inlineoverridevirtual

Filter the input path.

The CTM parameter is provided for path effects that can use the information. The output of path effects must always be in the original (input) coordinate system, regardless of whether the path effect uses the CTM or not.

Implements SkPathEffectBase.

Definition at line 89 of file SkDiscretePathEffect.cpp.

                                                                     {
        bool doFill = rec->isFillStyle();
 
        SkPathMeasure   meas(src, doFill);
 
        /* Caller may supply their own seed assist, which by default is 0 */
        uint32_t seed = fSeedAssist ^ SkScalarRoundToInt(meas.getLength());
 
        LCGRandom   rand(seed ^ ((seed << 16) | (seed >> 16)));
        SkScalar    scale = fPerterb;
        SkPoint     p;
        SkVector    v;
 
        do {
            SkScalar    length = meas.getLength();
    #if defined(SK_BUILD_FOR_FUZZER)
            if (length > 1000) {
                return false;
            }
    #endif
 
            if (fSegLength * (2 + doFill) > length) {
                meas.getSegment(0, length, dst, true);  // to short for us to mangle
            } else {
                int         n = SkScalarRoundToInt(length / fSegLength);
                constexpr int kMaxReasonableIterations = 100000;
                n = std::min(n, kMaxReasonableIterations);
                SkScalar    delta = length / n;
                SkScalar    distance = 0;
 
                if (meas.isClosed()) {
                    n -= 1;
                    distance += delta/2;
                }
 
                if (meas.getPosTan(distance, &p, &v)) {
                    Perterb(&p, v, rand.nextSScalar1() * scale);
                    dst->moveTo(p);
                }
                while (--n >= 0) {
                    distance += delta;
                    if (meas.getPosTan(distance, &p, &v)) {
                        Perterb(&p, v, rand.nextSScalar1() * scale);
                        dst->lineTo(p);
                    }
                }
                if (meas.isClosed()) {
                    dst->close();
                }
            }
        } while (meas.nextContour());
        return true;
    }

The documentation for this class was generated from the following file:

third_party/skia/src/effects/SkDiscretePathEffect.cpp

Public Member Functions

Static Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ SkDiscretePathEffectImpl()

Member Function Documentation

◆ computeFastBounds()

◆ CreateProc()

◆ flatten()

◆ getFactory()

◆ getTypeName()

◆ onFilterPath()