skgpu::BlendFormula Class Reference

#include <BlendFormula.h>

Public Types
enum	OutputType {   kNone_OutputType , kCoverage_OutputType , kModulate_OutputType , kSAModulate_OutputType ,   kISAModulate_OutputType , kISCModulate_OutputType , kLast_OutputType = kISCModulate_OutputType }

Public Member Functions
constexpr	BlendFormula (OutputType primaryOut, OutputType secondaryOut, skgpu::BlendEquation equation, skgpu::BlendCoeff srcCoeff, skgpu::BlendCoeff dstCoeff)
	BlendFormula (const BlendFormula &)=default
BlendFormula &	operator= (const BlendFormula &)=default
bool	operator== (const BlendFormula &that) const
bool	hasSecondaryOutput () const
bool	modifiesDst () const
bool	unaffectedByDst () const
bool	unaffectedByDstIfOpaque () const
bool	usesInputColor () const
bool	canTweakAlphaForCoverage () const
skgpu::BlendEquation	equation () const
skgpu::BlendCoeff	srcCoeff () const
skgpu::BlendCoeff	dstCoeff () const
OutputType	primaryOutput () const
OutputType	secondaryOutput () const

Detailed Description

Wraps the shader outputs and HW blend state that comprise a Porter Duff blend mode with coverage.

Definition at line 25 of file BlendFormula.h.

Member Enumeration Documentation

OutputType

enum skgpu::BlendFormula::OutputType

Values the shader can write to primary and secondary outputs. These are all modulated by coverage. We will ignore the multiplies when not using coverage.

Enumerator
kNone_OutputType
kCoverage_OutputType
kModulate_OutputType
kSAModulate_OutputType
kISAModulate_OutputType
kISCModulate_OutputType
kLast_OutputType

Definition at line 31 of file BlendFormula.h.

                    {
        kNone_OutputType,        //<! 0
        kCoverage_OutputType,    //<! inputCoverage
        kModulate_OutputType,    //<! inputColor * inputCoverage
        kSAModulate_OutputType,  //<! inputColor.a * inputCoverage
        kISAModulate_OutputType, //<! (1 - inputColor.a) * inputCoverage
        kISCModulate_OutputType, //<! (1 - inputColor) * inputCoverage
 
        kLast_OutputType = kISCModulate_OutputType
    };

Constructor & Destructor Documentation

BlendFormula() [1/2]

constexpr skgpu::BlendFormula::BlendFormula ( OutputType  primaryOut, OutputType  secondaryOut, skgpu::BlendEquation  equation, skgpu::BlendCoeff  srcCoeff, skgpu::BlendCoeff  dstCoeff  )

inlineconstexpr

Definition at line 42 of file BlendFormula.h.

            : fPrimaryOutputType(primaryOut)
            , fSecondaryOutputType(secondaryOut)
            , fBlendEquation(SkTo<uint8_t>(equation))
            , fSrcCoeff(SkTo<uint8_t>(srcCoeff))
            , fDstCoeff(SkTo<uint8_t>(dstCoeff))
            , fProps(GetProperties(primaryOut, secondaryOut, equation, srcCoeff, dstCoeff)) {}

BlendFormula() [2/2]

skgpu::BlendFormula::BlendFormula ( const BlendFormula &  )

default

Member Function Documentation

canTweakAlphaForCoverage()

bool skgpu::BlendFormula::canTweakAlphaForCoverage ( ) const

inline

Definition at line 83 of file BlendFormula.h.

                                          {
        return SkToBool(fProps & kCanTweakAlphaForCoverage_Property);
    }

dstCoeff()

skgpu::BlendCoeff skgpu::BlendFormula::dstCoeff ( ) const

inline

Definition at line 95 of file BlendFormula.h.

                                     {
        return static_cast<skgpu::BlendCoeff>(fDstCoeff);
    }

equation()

skgpu::BlendEquation skgpu::BlendFormula::equation ( ) const

inline

Definition at line 87 of file BlendFormula.h.

                                        {
        return static_cast<skgpu::BlendEquation>(fBlendEquation);
    }

hasSecondaryOutput()

bool skgpu::BlendFormula::hasSecondaryOutput ( ) const

inline

Definition at line 66 of file BlendFormula.h.

                                    {
        return kNone_OutputType != fSecondaryOutputType;
    }

modifiesDst()

bool skgpu::BlendFormula::modifiesDst ( ) const

inline

Definition at line 69 of file BlendFormula.h.

                             {
        return SkToBool(fProps & kModifiesDst_Property);
    }

operator=()

BlendFormula & skgpu::BlendFormula::operator= ( const BlendFormula &  )

default

operator==()

bool skgpu::BlendFormula::operator== ( const BlendFormula &  that ) const

inline

Definition at line 57 of file BlendFormula.h.

                                                    {
        return fPrimaryOutputType == that.fPrimaryOutputType &&
               fSecondaryOutputType == that. fSecondaryOutputType &&
               fBlendEquation == that.fBlendEquation &&
               fSrcCoeff == that.fSrcCoeff &&
               fDstCoeff == that.fDstCoeff &&
               fProps == that.fProps;
    }

primaryOutput()

OutputType skgpu::BlendFormula::primaryOutput ( ) const

inline

Definition at line 99 of file BlendFormula.h.

                                     {
        return fPrimaryOutputType;
    }

secondaryOutput()

OutputType skgpu::BlendFormula::secondaryOutput ( ) const

inline

Definition at line 103 of file BlendFormula.h.

                                       {
        return fSecondaryOutputType;
    }

srcCoeff()

skgpu::BlendCoeff skgpu::BlendFormula::srcCoeff ( ) const

inline

Definition at line 91 of file BlendFormula.h.

                                     {
        return static_cast<skgpu::BlendCoeff>(fSrcCoeff);
    }

unaffectedByDst()

bool skgpu::BlendFormula::unaffectedByDst ( ) const

inline

Definition at line 72 of file BlendFormula.h.

                                 {
        return SkToBool(fProps & kUnaffectedByDst_Property);
    }

unaffectedByDstIfOpaque()

bool skgpu::BlendFormula::unaffectedByDstIfOpaque ( ) const

inline

Definition at line 77 of file BlendFormula.h.

                                         {
        return SkToBool(fProps & kUnaffectedByDstIfOpaque_Property);
    }

usesInputColor()

bool skgpu::BlendFormula::usesInputColor ( ) const

inline

Definition at line 80 of file BlendFormula.h.

                                {
        return SkToBool(fProps & kUsesInputColor_Property);
    }

Member Data Documentation

fBlendEquation

uint32_t skgpu::BlendFormula::fBlendEquation

Definition at line 165 of file BlendFormula.h.

fDstCoeff

uint32_t skgpu::BlendFormula::fDstCoeff

Definition at line 167 of file BlendFormula.h.

fPrimaryOutputType

OutputType skgpu::BlendFormula::fPrimaryOutputType

Definition at line 163 of file BlendFormula.h.

fProps

Properties skgpu::BlendFormula::fProps

Definition at line 168 of file BlendFormula.h.

fSecondaryOutputType

OutputType skgpu::BlendFormula::fSecondaryOutputType

Definition at line 164 of file BlendFormula.h.

fSrcCoeff

uint32_t skgpu::BlendFormula::fSrcCoeff

Definition at line 166 of file BlendFormula.h.

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

• third_party/skia/src/gpu/BlendFormula.h