#include <SkBlenderBase.h>

Inheritance diagram for SkBlenderBase:

Public Types
enum class	BlenderType { M }

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 &)

Public Member Functions
virtual std::optional< SkBlendMode >	asBlendMode () const

bool	affectsTransparentBlack () const

bool	appendStages (const SkStageRec &rec) const

virtual bool	onAppendStages (const SkStageRec &rec) const =0

virtual SkRuntimeEffect *	asRuntimeEffect () const

SkFlattenable::Type	getFlattenableType () const override

virtual BlenderType	type () const =0

Public Member Functions inherited from SkFlattenable
	SkFlattenable ()

virtual Factory	getFactory () const =0

virtual const char *	getTypeName () const =0

virtual void	flatten (SkWriteBuffer &) const

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 SkFlattenable::Type	GetFlattenableType ()

Static Public Member Functions inherited from SkBlender
static sk_sp< SkBlender >	Mode (SkBlendMode mode)

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

Encapsulates a blend function, including non-public APIs. Blends combine a source color (the result of our paint) and destination color (from the canvas) into a final color.

Definition at line 39 of file SkBlenderBase.h.

Member Enumeration Documentation

◆ BlenderType

enum class SkBlenderBase::BlenderType

strong

Enumerator
M

Definition at line 60 of file SkBlenderBase.h.

                           {
    #define M(type) k ## type,
        SK_ALL_BLENDERS(M)
    #undef M
    };

Member Function Documentation

◆ affectsTransparentBlack()

bool SkBlenderBase::affectsTransparentBlack ( ) const

Definition at line 79 of file SkBlendModeBlender.cpp.

                                                  {
    if (auto blendMode = this->asBlendMode()) {
        SkBlendModeCoeff src, dst;
        if (SkBlendMode_AsCoeff(*blendMode, &src, &dst)) {
            // If the source is (0,0,0,0), then dst is preserved as long as its coefficient
            // evaluates to 1.0. This is true for kOne, kISA, and kISC. Anything else means the
            // blend mode affects transparent black.
            return dst != SkBlendModeCoeff::kOne &&
                   dst != SkBlendModeCoeff::kISA &&
                   dst != SkBlendModeCoeff::kISC;
        } else {
            // An advanced blend mode, which do not affect transparent black
            return false;
        }
    } else {
        // Blenders that aren't blend modes are assumed to modify transparent black.
       return true;
    }
}

◆ appendStages()

bool SkBlenderBase::appendStages ( const SkStageRec & rec ) const

inline

Definition at line 49 of file SkBlenderBase.h.

                                                                 {
        return this->onAppendStages(rec);
    }

◆ asBlendMode()

virtual std::optional< SkBlendMode > SkBlenderBase::asBlendMode ( ) const

inlinevirtual

Returns true if this SkBlender represents any SkBlendMode, and returns the blender's SkBlendMode in mode. Returns false for other types of blends.

Reimplemented in SkBlendModeBlender.

Definition at line 45 of file SkBlenderBase.h.

45{ return {}; }

◆ asRuntimeEffect()

virtual SkRuntimeEffect * SkBlenderBase::asRuntimeEffect ( ) const

inlinevirtual

Reimplemented in SkRuntimeBlender.

Definition at line 55 of file SkBlenderBase.h.

55{ return nullptr; }

◆ GetFlattenableType()

static SkFlattenable::Type SkBlenderBase::GetFlattenableType ( )

inlinestatic

Definition at line 57 of file SkBlenderBase.h.

57{ return kSkBlender_Type; }

SkFlattenable::kSkBlender_Type

@ kSkBlender_Type

Definition SkFlattenable.h:32

◆ getFlattenableType()

SkFlattenable::Type SkBlenderBase::getFlattenableType ( ) const

inlineoverridevirtual

Implements SkFlattenable.

Definition at line 58 of file SkBlenderBase.h.

58{ return GetFlattenableType(); }

SkBlenderBase::GetFlattenableType

static SkFlattenable::Type GetFlattenableType()

Definition SkBlenderBase.h:57

◆ onAppendStages()

virtual bool SkBlenderBase::onAppendStages ( const SkStageRec & rec ) const

pure virtual

Implemented in SkBlendModeBlender, and SkRuntimeBlender.

◆ type()

virtual BlenderType SkBlenderBase::type ( ) const