skgpu::ganesh::QuadPerEdgeAA::QuadPerEdgeAAGeometryProcessor Class Reference

Inheritance diagram for skgpu::ganesh::QuadPerEdgeAA::QuadPerEdgeAAGeometryProcessor:

Public Member Functions
const char *	name () const override
void	addToKey (const GrShaderCaps &, KeyBuilder *b) const override
std::unique_ptr< ProgramImpl >	makeProgramImpl (const GrShaderCaps &) const override
Public Member Functions inherited from GrGeometryProcessor
	GrGeometryProcessor (ClassID)
int	numTextureSamplers () const
const TextureSampler &	textureSampler (int index) const
int	numVertexAttributes () const
const AttributeSet &	vertexAttributes () const
int	numInstanceAttributes () const
const AttributeSet &	instanceAttributes () const
bool	hasVertexAttributes () const
bool	hasInstanceAttributes () const
size_t	vertexStride () const
size_t	instanceStride () const
void	getAttributeKey (skgpu::KeyBuilder *b) 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

Static Public Member Functions
static GrGeometryProcessor *	Make (SkArenaAlloc *arena, const VertexSpec &spec)
static GrGeometryProcessor *	Make (SkArenaAlloc *arena, const VertexSpec &vertexSpec, const GrShaderCaps &caps, const GrBackendFormat &backendFormat, GrSamplerState samplerState, const skgpu::Swizzle &swizzle, sk_sp< GrColorSpaceXform > textureColorSpaceXform, Saturate saturate)
Static Public Member Functions inherited from GrGeometryProcessor
static uint32_t	ComputeCoordTransformsKey (const GrFragmentProcessor &fp)

Private Member Functions
const TextureSampler &	onTextureSampler (int) 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 }
Static Public Attributes inherited from GrGeometryProcessor
static constexpr int	kCoordTransformKeyBits = 4
Protected Member Functions inherited from GrGeometryProcessor
void	setVertexAttributes (const Attribute *attrs, int attrCount, size_t stride)
void	setInstanceAttributes (const Attribute *attrs, int attrCount, size_t stride)
void	setVertexAttributesWithImplicitOffsets (const Attribute *attrs, int attrCount)
void	setInstanceAttributesWithImplicitOffsets (const Attribute *attrs, int attrCount)
void	setTextureSamplerCnt (int cnt)
Protected Member Functions inherited from GrProcessor
	GrProcessor (ClassID classID)
	GrProcessor (const GrProcessor &)=delete
GrProcessor &	operator= (const GrProcessor &)=delete
Static Protected Member Functions inherited from GrGeometryProcessor
static Attribute	MakeColorAttribute (const char *name, bool wideColor)
Protected Attributes inherited from GrProcessor
const ClassID	fClassID

Detailed Description

Definition at line 599 of file QuadPerEdgeAA.cpp.

Member Function Documentation

addToKey()

void skgpu::ganesh::QuadPerEdgeAA::QuadPerEdgeAAGeometryProcessor::addToKey ( const GrShaderCaps &  , KeyBuilder *    ) const

inlineoverridevirtual

Adds a key on the skgpu::KeyBuilder that reflects any variety in the code that the geometry processor subclass can emit.

Implements GrGeometryProcessor.

Definition at line 624 of file QuadPerEdgeAA.cpp.

                                                                     {
        // texturing, device-dimensions are single bit flags
        b->addBool(fTexSubset.isInitialized(),    "subset");
        b->addBool(fSampler.isInitialized(),      "textured");
        b->addBool(fNeedsPerspective,             "perspective");
        b->addBool((fSaturate == Saturate::kYes), "saturate");
 
        b->addBool(fLocalCoord.isInitialized(),   "hasLocalCoords");
        if (fLocalCoord.isInitialized()) {
            // 2D (0) or 3D (1)
            b->addBits(1, (kFloat3_GrVertexAttribType == fLocalCoord.cpuType()), "localCoordsType");
        }
        b->addBool(fColor.isInitialized(),        "hasColor");
        if (fColor.isInitialized()) {
            // bytes (0) or floats (1)
            b->addBits(1, (kFloat4_GrVertexAttribType == fColor.cpuType()), "colorType");
        }
        // and coverage mode, 00 for none, 01 for withposition, 10 for withcolor, 11 for
        // position+geomsubset
        uint32_t coverageKey = 0;
        SkASSERT(!fGeomSubset.isInitialized() || fCoverageMode == CoverageMode::kWithPosition);
        if (fCoverageMode != CoverageMode::kNone) {
            coverageKey = fGeomSubset.isInitialized()
                                  ? 0x3
                                  : (CoverageMode::kWithPosition == fCoverageMode ? 0x1 : 0x2);
        }
        b->addBits(2, coverageKey, "coverageMode");
 
        b->add32(GrColorSpaceXform::XformKey(fTextureColorSpaceXform.get()), "colorSpaceXform");
    }

Make() [1/2]

static GrGeometryProcessor * skgpu::ganesh::QuadPerEdgeAA::QuadPerEdgeAAGeometryProcessor::Make ( SkArenaAlloc *  arena, const VertexSpec &  spec  )

inlinestatic

Definition at line 601 of file QuadPerEdgeAA.cpp.

                                                                                  {
        return arena->make([&](void* ptr) {
            return new (ptr) QuadPerEdgeAAGeometryProcessor(spec);
        });
    }

Make() [2/2]

static GrGeometryProcessor * skgpu::ganesh::QuadPerEdgeAA::QuadPerEdgeAAGeometryProcessor::Make ( SkArenaAlloc *  arena, const VertexSpec &  vertexSpec, const GrShaderCaps &  caps, const GrBackendFormat &  backendFormat, GrSamplerState  samplerState, const skgpu::Swizzle &  swizzle, sk_sp< GrColorSpaceXform >  textureColorSpaceXform, Saturate  saturate  )

inlinestatic

Definition at line 607 of file QuadPerEdgeAA.cpp.

                                                        {
        return arena->make([&](void* ptr) {
            return new (ptr) QuadPerEdgeAAGeometryProcessor(
                    vertexSpec, caps, backendFormat, samplerState, swizzle,
                    std::move(textureColorSpaceXform), saturate);
        });
    }

makeProgramImpl()

std::unique_ptr< ProgramImpl > skgpu::ganesh::QuadPerEdgeAA::QuadPerEdgeAAGeometryProcessor::makeProgramImpl ( const GrShaderCaps &  ) const

inlineoverridevirtual

Returns a new instance of the appropriate implementation class for the given GrGeometryProcessor.

Implements GrGeometryProcessor.

Definition at line 655 of file QuadPerEdgeAA.cpp.

                                                                                   {
        class Impl : public ProgramImpl {
        public:
            void setData(const GrGLSLProgramDataManager& pdman,
                         const GrShaderCaps&,
                         const GrGeometryProcessor& geomProc) override {
                const auto& gp = geomProc.cast<QuadPerEdgeAAGeometryProcessor>();
                fTextureColorSpaceXformHelper.setData(pdman, gp.fTextureColorSpaceXform.get());
            }
 
        private:
            void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override {
                using Interpolation = GrGLSLVaryingHandler::Interpolation;
 
                const auto& gp = args.fGeomProc.cast<QuadPerEdgeAAGeometryProcessor>();
                fTextureColorSpaceXformHelper.emitCode(args.fUniformHandler,
                                                       gp.fTextureColorSpaceXform.get());
 
                args.fVaryingHandler->emitAttributes(gp);
 
                if (gp.fCoverageMode == CoverageMode::kWithPosition) {
                    // Strip last channel from the vertex attribute to remove coverage and get the
                    // actual position
                    if (gp.fNeedsPerspective) {
                        args.fVertBuilder->codeAppendf("float3 position = %s.xyz;",
                                                       gp.fPosition.name());
                    } else {
                        args.fVertBuilder->codeAppendf("float2 position = %s.xy;",
                                                       gp.fPosition.name());
                    }
                    gpArgs->fPositionVar = {"position",
                                            gp.fNeedsPerspective ? SkSLType::kFloat3
                                                                 : SkSLType::kFloat2,
                                            GrShaderVar::TypeModifier::None};
                } else {
                    // No coverage to eliminate
                    gpArgs->fPositionVar = gp.fPosition.asShaderVar();
                }
 
                // This attribute will be uninitialized if earlier FP analysis determined no
                // local coordinates are needed (and this will not include the inline texture
                // fetch this GP does before invoking FPs).
                gpArgs->fLocalCoordVar = gp.fLocalCoord.asShaderVar();
 
                // Solid color before any texturing gets modulated in
                const char* blendDst;
                if (gp.fColor.isInitialized()) {
                    SkASSERT(gp.fCoverageMode != CoverageMode::kWithColor || !gp.fNeedsPerspective);
                    // The color cannot be flat if the varying coverage has been modulated into it
                    args.fFragBuilder->codeAppendf("half4 %s;", args.fOutputColor);
                    args.fVaryingHandler->addPassThroughAttribute(
                            gp.fColor.asShaderVar(),
                            args.fOutputColor,
                            gp.fCoverageMode == CoverageMode::kWithColor
                                    ? Interpolation::kInterpolated
                                    : Interpolation::kCanBeFlat);
                    blendDst = args.fOutputColor;
                } else {
                    // Output color must be initialized to something
                    args.fFragBuilder->codeAppendf("half4 %s = half4(1);", args.fOutputColor);
                    blendDst = nullptr;
                }
 
                // If there is a texture, must also handle texture coordinates and reading from
                // the texture in the fragment shader before continuing to fragment processors.
                if (gp.fSampler.isInitialized()) {
                    // Texture coordinates clamped by the subset on the fragment shader; if the GP
                    // has a texture, it's guaranteed to have local coordinates
                    args.fFragBuilder->codeAppend("float2 texCoord;");
                    if (gp.fLocalCoord.cpuType() == kFloat3_GrVertexAttribType) {
                        // Can't do a pass through since we need to perform perspective division
                        GrGLSLVarying v(gp.fLocalCoord.gpuType());
                        args.fVaryingHandler->addVarying(gp.fLocalCoord.name(), &v);
                        args.fVertBuilder->codeAppendf("%s = %s;",
                                                       v.vsOut(), gp.fLocalCoord.name());
                        args.fFragBuilder->codeAppendf("texCoord = %s.xy / %s.z;",
                                                       v.fsIn(), v.fsIn());
                    } else {
                        args.fVaryingHandler->addPassThroughAttribute(gp.fLocalCoord.asShaderVar(),
                                                                      "texCoord");
                    }
 
                    // Clamp the now 2D localCoordName variable by the subset if it is provided
                    if (gp.fTexSubset.isInitialized()) {
                        args.fFragBuilder->codeAppend("float4 subset;");
                        args.fVaryingHandler->addPassThroughAttribute(gp.fTexSubset.asShaderVar(),
                                                                      "subset",
                                                                      Interpolation::kCanBeFlat);
                        args.fFragBuilder->codeAppend(
                                "texCoord = clamp(texCoord, subset.LT, subset.RB);");
                    }
 
                    // Now modulate the starting output color by the texture lookup
                    args.fFragBuilder->codeAppendf(
                            "%s = %s(",
                            args.fOutputColor,
                            (gp.fSaturate == Saturate::kYes) ? "saturate" : "");
                    args.fFragBuilder->appendTextureLookupAndBlend(
                            blendDst, SkBlendMode::kModulate, args.fTexSamplers[0],
                            "texCoord", &fTextureColorSpaceXformHelper);
                    args.fFragBuilder->codeAppend(");");
                } else {
                    // Saturate is only intended for use with a proxy to account for the fact
                    // that TextureOp skips SkPaint conversion, which normally handles this.
                    SkASSERT(gp.fSaturate == Saturate::kNo);
                }
 
                // And lastly, output the coverage calculation code
                if (gp.fCoverageMode == CoverageMode::kWithPosition) {
                    GrGLSLVarying coverage(SkSLType::kFloat);
                    args.fVaryingHandler->addVarying("coverage", &coverage);
                    if (gp.fNeedsPerspective) {
                        // Multiply by "W" in the vertex shader, then by 1/w (sk_FragCoord.w) in
                        // the fragment shader to get screen-space linear coverage.
                        args.fVertBuilder->codeAppendf("%s = %s.w * %s.z;",
                                                       coverage.vsOut(), gp.fPosition.name(),
                                                       gp.fPosition.name());
                        args.fFragBuilder->codeAppendf("float coverage = %s * sk_FragCoord.w;",
                                                        coverage.fsIn());
                    } else {
                        args.fVertBuilder->codeAppendf("%s = %s;",
                                                       coverage.vsOut(), gp.fCoverage.name());
                        args.fFragBuilder->codeAppendf("float coverage = %s;", coverage.fsIn());
                    }
 
                    if (gp.fGeomSubset.isInitialized()) {
                        // Calculate distance from sk_FragCoord to the 4 edges of the subset
                        // and clamp them to (0, 1). Use the minimum of these and the original
                        // coverage. This only has to be done in the exterior triangles, the
                        // interior of the quad geometry can never be clipped by the subset box.
                        args.fFragBuilder->codeAppend("float4 geoSubset;");
                        args.fVaryingHandler->addPassThroughAttribute(gp.fGeomSubset.asShaderVar(),
                                                                      "geoSubset",
                                                                      Interpolation::kCanBeFlat);
                        args.fFragBuilder->codeAppend(
                                // This is lifted from GrFragmentProcessor::Rect.
                                "float4 dists4 = saturate(float4(1, 1, -1, -1) * "
                                                         "(sk_FragCoord.xyxy - geoSubset));"
                                "float2 dists2 = dists4.xy + dists4.zw - 1;"
                                "coverage = min(coverage, dists2.x * dists2.y);");
                    }
 
                    args.fFragBuilder->codeAppendf("half4 %s = half4(coverage);",
                                                   args.fOutputCoverage);
                } else {
                    // Set coverage to 1, since it's either non-AA or the coverage was already
                    // folded into the output color
                    SkASSERT(!gp.fGeomSubset.isInitialized());
                    args.fFragBuilder->codeAppendf("const half4 %s = half4(1);",
                                                   args.fOutputCoverage);
                }
            }
 
            GrGLSLColorSpaceXformHelper fTextureColorSpaceXformHelper;
        };
 
        return std::make_unique<Impl>();
    }

name()

const char * skgpu::ganesh::QuadPerEdgeAA::QuadPerEdgeAAGeometryProcessor::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 622 of file QuadPerEdgeAA.cpp.

{ return "QuadPerEdgeAAGeometryProcessor"; }

onTextureSampler()

const TextureSampler & skgpu::ganesh::QuadPerEdgeAA::QuadPerEdgeAAGeometryProcessor::onTextureSampler ( int  ) const

inlineoverrideprivatevirtual

Reimplemented from GrGeometryProcessor.

Definition at line 885 of file QuadPerEdgeAA.cpp.

{ return fSampler; }

---

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

• third_party/skia/src/gpu/ganesh/ops/QuadPerEdgeAA.cpp