SkEmptyShader Class Reference

#include <SkEmptyShader.h>

Inheritance diagram for SkEmptyShader:

Public Member Functions
	SkEmptyShader ()
Public Member Functions inherited from SkShaderBase
	~SkShaderBase () override
sk_sp< SkShader >	makeInvertAlpha () const
sk_sp< SkShader >	makeWithCTM (const SkMatrix &) const
virtual bool	isConstant () const
virtual GradientType	asGradient (GradientInfo *info=nullptr, SkMatrix *localMatrix=nullptr) const
Context *	makeContext (const ContextRec &, SkArenaAlloc *) const
bool	asLuminanceColor (SkColor4f *) const
bool	appendRootStages (const SkStageRec &rec, const SkMatrix &ctm) const
virtual SkImage *	onIsAImage (SkMatrix *, SkTileMode[2]) const
virtual SkRuntimeEffect *	asRuntimeEffect () const
Type	getFlattenableType () const override
virtual sk_sp< SkShader >	makeAsALocalMatrixShader (SkMatrix *localMatrix) const
Public Member Functions inherited from SkShader
virtual bool	isOpaque () const
SkImage *	isAImage (SkMatrix *localMatrix, SkTileMode xy[2]) const
bool	isAImage () const
sk_sp< SkShader >	makeWithLocalMatrix (const SkMatrix &) const
sk_sp< SkShader >	makeWithColorFilter (sk_sp< SkColorFilter >) const
sk_sp< SkShader >	makeWithWorkingColorSpace (sk_sp< SkColorSpace >) const
Public Member Functions inherited from SkFlattenable
	SkFlattenable ()
virtual Factory	getFactory () const =0
virtual const char *	getTypeName () 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

Protected Member Functions
void	flatten (SkWriteBuffer &buffer) const override
bool	appendStages (const SkStageRec &, const SkShaders::MatrixRec &) const override
ShaderType	type () const override
Protected Member Functions inherited from SkShaderBase
	SkShaderBase ()
void	flatten (SkWriteBuffer &) const override
virtual bool	onAsLuminanceColor (SkColor4f *) const

Additional Inherited Members
Public Types inherited from SkShaderBase
enum class	ShaderType { M }
enum class	GradientType { kNone , M }
enum	Flags { kOpaqueAlpha_Flag = 1 << 0 }
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 &)
Static Public Member Functions inherited from SkShaderBase
static Type	GetFlattenableType ()
static sk_sp< SkShaderBase >	Deserialize (const void *data, size_t size, const SkDeserialProcs *procs=nullptr)
static void	RegisterFlattenables ()
static SkMatrix	ConcatLocalMatrices (const SkMatrix &parentLM, const SkMatrix &childLM)
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)

Detailed Description

A Shader that always draws nothing. Its createContext always returns nullptr.

Definition at line 22 of file SkEmptyShader.h.

Constructor & Destructor Documentation

SkEmptyShader()

SkEmptyShader::SkEmptyShader ( )

inline

Definition at line 24 of file SkEmptyShader.h.

{}

Member Function Documentation

appendStages()

bool SkEmptyShader::appendStages ( const SkStageRec &  , const SkShaders::MatrixRec &    ) const

inlineoverrideprotectedvirtual

Adds stages to implement this shader. To ensure that the correct input coords are present in r,g MatrixRec::apply() must be called (unless the shader doesn't require it's input coords). The default impl creates shadercontext and calls that (not very efficient).

Implements SkShaderBase.

Definition at line 33 of file SkEmptyShader.h.

                                                                                   {
        return false;
    }

flatten()

void SkEmptyShader::flatten ( SkWriteBuffer &  ) const

inlineoverrideprotectedvirtual

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 27 of file SkEmptyShader.h.

                                                       {
        // Do nothing.
        // We just don't want to fall through to SkShader::flatten(),
        // which will write data we don't care to serialize or decode.
    }

type()

ShaderType SkEmptyShader::type ( ) const

inlineoverrideprotectedvirtual

Implements SkShaderBase.

Definition at line 37 of file SkEmptyShader.h.

{ return ShaderType::kEmpty; }

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

• third_party/skia/src/shaders/SkEmptyShader.h