PDLCDXferProcessor Class Reference

Inheritance diagram for PDLCDXferProcessor:

Public Member Functions
const char *	name () const override
std::unique_ptr< ProgramImpl >	makeProgramImpl () const override
Public Member Functions inherited from GrXferProcessor
void	addToKey (const GrShaderCaps &, skgpu::KeyBuilder *, const GrSurfaceOrigin *originIfDstTexture, bool usesInputAttachmentForDstRead) const
virtual GrXferBarrierType	xferBarrierType (const GrCaps &caps) const
skgpu::BlendInfo	getBlendInfo () const
bool	willReadDstColor () const
bool	hasSecondaryOutput () const
bool	isLCD () const
bool	isEqual (const GrXferProcessor &that) const
Public Member Functions inherited from GrProcessor
virtual	~GrProcessor ()=default
void *	operator new (size_t size)
void *	operator new (size_t object_size, size_t footer_size)
void	operator delete (void *target)
void *	operator new (size_t size, void *placement)
void	operator delete (void *target, void *placement)
template<typename T >
const T &	cast () const
ClassID	classID () const
Public Member Functions inherited from GrNonAtomicRef< GrXferProcessor >
	GrNonAtomicRef ()
bool	unique () const
int	refCnt () const
void	ref () const
void	unref () const
Public Member Functions inherited from SkNoncopyable
	SkNoncopyable ()=default
	SkNoncopyable (SkNoncopyable &&)=default
SkNoncopyable &	operator= (SkNoncopyable &&)=default

Static Public Member Functions
static sk_sp< const GrXferProcessor >	Make (SkBlendMode mode, const GrProcessorAnalysisColor &inputColor)

Private Member Functions
void	onAddToKey (const GrShaderCaps &, skgpu::KeyBuilder *) const override
void	onGetBlendInfo (skgpu::BlendInfo *blendInfo) const override
bool	onIsEqual (const GrXferProcessor &xpBase) const override

Additional Inherited Members
Public Types inherited from GrProcessor
enum	ClassID {   kNull_ClassID , kAttributeTestProcessor_ClassID , kBigKeyProcessor_ClassID , kBlendFragmentProcessor_ClassID ,   kBlockInputFragmentProcessor_ClassID , kButtCapStrokedCircleGeometryProcessor_ClassID , kCircleGeometryProcessor_ClassID , kCircularRRectEffect_ClassID ,   kClockwiseTestProcessor_ClassID , kColorTableEffect_ClassID , kCoverageSetOpXP_ClassID , kCustomXP_ClassID ,   kDashingCircleEffect_ClassID , kDashingLineEffect_ClassID , kDefaultGeoProc_ClassID , kDeviceSpace_ClassID ,   kDIEllipseGeometryProcessor_ClassID , kDisableColorXP_ClassID , kDrawAtlasPathShader_ClassID , kEllipseGeometryProcessor_ClassID ,   kEllipticalRRectEffect_ClassID , kFwidthSquircleTestProcessor_ClassID , kGP_ClassID , kGrBicubicEffect_ClassID ,   kGrBitmapTextGeoProc_ClassID , kGrColorSpaceXformEffect_ClassID , kGrConicEffect_ClassID , kGrConvexPolyEffect_ClassID ,   kGrDiffuseLightingEffect_ClassID , kGrDisplacementMapEffect_ClassID , kGrDistanceFieldA8TextGeoProc_ClassID , kGrDistanceFieldLCDTextGeoProc_ClassID ,   kGrDistanceFieldPathGeoProc_ClassID , kGrFillRRectOp_Processor_ClassID , kGrGaussianConvolutionFragmentProcessor_ClassID , kGrMatrixConvolutionEffect_ClassID ,   kGrMatrixEffect_ClassID , kGrMeshTestProcessor_ClassID , kGrMorphologyEffect_ClassID , kGrPerlinNoise2Effect_ClassID ,   kGrPipelineDynamicStateTestProcessor_ClassID , kGrQuadEffect_ClassID , kGrRRectShadowGeoProc_ClassID , kGrSkSLFP_ClassID ,   kGrSpecularLightingEffect_ClassID , kGrTextureEffect_ClassID , kGrUnrolledBinaryGradientColorizer_ClassID , kGrYUVtoRGBEffect_ClassID ,   kHighPrecisionFragmentProcessor_ClassID , kLatticeGP_ClassID , kPDLCDXferProcessor_ClassID , kPorterDuffXferProcessor_ClassID ,   kPremulFragmentProcessor_ClassID , kQuadEdgeEffect_ClassID , kQuadPerEdgeAAGeometryProcessor_ClassID , kSeriesFragmentProcessor_ClassID ,   kShaderPDXferProcessor_ClassID , kSurfaceColorProcessor_ClassID , kSwizzleFragmentProcessor_ClassID , kTessellate_BoundingBoxShader_ClassID ,   kTessellate_GrModulateAtlasCoverageEffect_ClassID , kTessellate_GrStrokeTessellationShader_ClassID , kTessellate_HullShader_ClassID , kTessellate_MiddleOutShader_ClassID ,   kTessellate_SimpleTriangleShader_ClassID , kTessellationTestTriShader_ClassID , kTestFP_ClassID , kTestRectOp_ClassID ,   kVertexColorSpaceBenchGP_ClassID , kVerticesGP_ClassID }
Protected Member Functions inherited from GrXferProcessor
	GrXferProcessor (ClassID classID)
	GrXferProcessor (ClassID classID, bool willReadDstColor, GrProcessorAnalysisCoverage)
Protected Member Functions inherited from GrProcessor
	GrProcessor (ClassID classID)
	GrProcessor (const GrProcessor &)=delete
GrProcessor &	operator= (const GrProcessor &)=delete
Protected Attributes inherited from GrProcessor
const ClassID	fClassID

Detailed Description

Definition at line 212 of file GrPorterDuffXferProcessor.cpp.

Member Function Documentation

Make()

sk_sp< const GrXferProcessor > PDLCDXferProcessor::Make ( SkBlendMode  mode, const GrProcessorAnalysisColor &  inputColor  )

static

Definition at line 253 of file GrPorterDuffXferProcessor.cpp.

                                                                                             {
    if (SkBlendMode::kSrcOver != mode) {
        return nullptr;
    }
    SkPMColor4f blendConstantPM;
    if (!color.isConstant(&blendConstantPM)) {
        return nullptr;
    }
    SkColor4f blendConstantUPM = blendConstantPM.unpremul();
    float alpha = blendConstantUPM.fA;
    blendConstantPM = { blendConstantUPM.fR, blendConstantUPM.fG, blendConstantUPM.fB, 1 };
    return sk_sp<GrXferProcessor>(new PDLCDXferProcessor(blendConstantPM, alpha));
}

makeProgramImpl()

std::unique_ptr< GrXferProcessor::ProgramImpl > PDLCDXferProcessor::makeProgramImpl ( ) const

overridevirtual

Returns a new instance of the appropriate GL implementation class for the given GrXferProcessor; caller is responsible for deleting the object.

Implements GrXferProcessor.

Definition at line 268 of file GrPorterDuffXferProcessor.cpp.

                                                                                    {
    class Impl : public ProgramImpl {
    private:
        void emitOutputsForBlendState(const EmitArgs& args) override {
            const char* alpha;
            fAlphaUniform = args.fUniformHandler->addUniform(nullptr,
                                                             kFragment_GrShaderFlag,
                                                             SkSLType::kHalf,
                                                             "alpha",
                                                             &alpha);
            GrGLSLXPFragmentBuilder* fragBuilder = args.fXPFragBuilder;
            // We want to force our primary output to be alpha * Coverage, where alpha is the alpha
            // value of the src color. We know that there are no color stages (or we wouldn't have
            // created this xp) and the r,g, and b channels of the op's input color are baked into
            // the blend constant.
            SkASSERT(args.fInputCoverage);
            fragBuilder->codeAppendf("%s = %s * %s;",
                                     args.fOutputPrimary,
                                     alpha, args.fInputCoverage);
        }
 
        void onSetData(const GrGLSLProgramDataManager& pdm, const GrXferProcessor& xp) override {
            float alpha = xp.cast<PDLCDXferProcessor>().fAlpha;
            if (fLastAlpha != alpha) {
                pdm.set1f(fAlphaUniform, alpha);
                fLastAlpha = alpha;
            }
        }
 
        GrGLSLUniformHandler::UniformHandle fAlphaUniform;
        float fLastAlpha = SK_FloatNaN;
    };
 
    return std::make_unique<Impl>();
}

name()

const char * PDLCDXferProcessor::name ( ) const

inlineoverridevirtual

Human-meaningful string to identify this processor; may be embedded in generated shader code and must be a legal SkSL identifier prefix.

Implements GrProcessor.

Definition at line 217 of file GrPorterDuffXferProcessor.cpp.

{ return "Porter Duff LCD"; }

onAddToKey()

void PDLCDXferProcessor::onAddToKey ( const GrShaderCaps &  , skgpu::KeyBuilder *    ) const

inlineoverrideprivatevirtual

Adds a key on the skgpu::KeyBuilder that reflects any variety in the code that may be emitted by the xfer processor subclass.

Implements GrXferProcessor.

Definition at line 224 of file GrPorterDuffXferProcessor.cpp.

{}

onGetBlendInfo()

void PDLCDXferProcessor::onGetBlendInfo ( skgpu::BlendInfo *  ) const

inlineoverrideprivatevirtual

If we are not performing a dst read, retrieves the fixed-function blend state required by the subclass. When using dst reads, the base class controls the fixed-function blend state and this method will not be called. The BlendInfo struct comes initialized to "no blending".

Reimplemented from GrXferProcessor.

Definition at line 226 of file GrPorterDuffXferProcessor.cpp.

                                                                  {
        blendInfo->fSrcBlend = skgpu::BlendCoeff::kConstC;
        blendInfo->fDstBlend = skgpu::BlendCoeff::kISC;
        blendInfo->fBlendConstant = fBlendConstant;
    }

onIsEqual()

bool PDLCDXferProcessor::onIsEqual ( const GrXferProcessor &  xpBase ) const

inlineoverrideprivatevirtual

Implements GrXferProcessor.

Definition at line 232 of file GrPorterDuffXferProcessor.cpp.

                                                                 {
        const PDLCDXferProcessor& xp = xpBase.cast<PDLCDXferProcessor>();
        if (fBlendConstant != xp.fBlendConstant || fAlpha != xp.fAlpha) {
            return false;
        }
        return true;
    }

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

• third_party/skia/src/gpu/ganesh/effects/GrPorterDuffXferProcessor.cpp