DisableColorXP Class Reference

Inheritance diagram for DisableColorXP:

Public Member Functions
	DisableColorXP ()
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

Private Member Functions
const char *	name () const override
bool	onIsEqual (const GrXferProcessor &xpBase) const override
void	onAddToKey (const GrShaderCaps &, skgpu::KeyBuilder *) const override
void	onGetBlendInfo (skgpu::BlendInfo *blendInfo) const override
std::unique_ptr< ProgramImpl >	makeProgramImpl () 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

This xfer processor disables color writing. Thus color and coverage and ignored and no blending occurs. This XP is usful for things like stenciling.

Definition at line 26 of file GrDisableColorXP.cpp.

Constructor & Destructor Documentation

DisableColorXP()

DisableColorXP::DisableColorXP ( )

inline

Definition at line 28 of file GrDisableColorXP.cpp.

: INHERITED(kDisableColorXP_ClassID) {}

Member Function Documentation

makeProgramImpl()

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

overrideprivatevirtual

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 42 of file GrDisableColorXP.cpp.

                                                                                {
    class Impl : public ProgramImpl {
    private:
        void emitOutputsForBlendState(const EmitArgs& args) override {
            if (args.fShaderCaps->fMustWriteToFragColor) {
                // This emit code should be empty. However, on the nexus 6 there is a driver bug
                // where if you do not give gl_FragColor a value, the gl context is lost and we end
                // up drawing nothing. So this fix just sets the gl_FragColor arbitrarily to 0.
                // https://bugs.chromium.org/p/chromium/issues/detail?id=445377
                GrGLSLXPFragmentBuilder* fragBuilder = args.fXPFragBuilder;
                fragBuilder->codeAppendf("%s = half4(0);", args.fOutputPrimary);
            }
        }
 
        void emitWriteSwizzle(GrGLSLXPFragmentBuilder*,
                              const skgpu::Swizzle&,
                              const char*,
                              const char*) const override {
            // Don't write any swizzling. This makes sure the final shader does not output a color.
        }
    };
 
    return std::make_unique<Impl>();
}

name()

const char * DisableColorXP::name ( ) const

inlineoverrideprivatevirtual

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 31 of file GrDisableColorXP.cpp.

{ return "Disable Color"; }

onAddToKey()

void DisableColorXP::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 33 of file GrDisableColorXP.cpp.

{}

onGetBlendInfo()

void DisableColorXP::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 34 of file GrDisableColorXP.cpp.

                                                                  {
        blendInfo->fWritesColor = false;
    }

onIsEqual()

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

inlineoverrideprivatevirtual

Implements GrXferProcessor.

Definition at line 32 of file GrDisableColorXP.cpp.

{ return true; }

---

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

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