GrYUVtoRGBEffect Class Reference

#include <GrYUVtoRGBEffect.h>

Inheritance diagram for GrYUVtoRGBEffect:

Public Member Functions
std::unique_ptr< GrFragmentProcessor >	clone () const override
const char *	name () const override
Public Member Functions inherited from GrFragmentProcessor
virtual std::unique_ptr< GrFragmentProcessor >	clone () const =0
const GrFragmentProcessor *	parent () const
std::unique_ptr< ProgramImpl >	makeProgramImpl () const
void	addToKey (const GrShaderCaps &caps, skgpu::KeyBuilder *b) const
int	numChildProcessors () const
int	numNonNullChildProcessors () const
GrFragmentProcessor *	childProcessor (int index)
const GrFragmentProcessor *	childProcessor (int index) const
	SkDEBUGCODE (bool isInstantiated() const ;) bool willReadDstColor() const
bool	isBlendFunction () const
bool	usesSampleCoordsDirectly () const
bool	usesSampleCoords () const
const SkSL::SampleUsage &	sampleUsage () const
bool	compatibleWithCoverageAsAlpha () const
bool	preservesOpaqueInput () const
bool	hasConstantOutputForConstantInput (SkPMColor4f inputColor, SkPMColor4f *outputColor) const
bool	hasConstantOutputForConstantInput () const
void	clearConstantOutputForConstantInputFlag ()
bool	isEqual (const GrFragmentProcessor &that) const
void	visitProxies (const GrVisitProxyFunc &) const
void	visitTextureEffects (const std::function< void(const GrTextureEffect &)> &) const
void	visitWithImpls (const std::function< void(const GrFragmentProcessor &, ProgramImpl &)> &, ProgramImpl &) const
GrTextureEffect *	asTextureEffect ()
const GrTextureEffect *	asTextureEffect () const
Public Member Functions inherited from GrProcessor
virtual	~GrProcessor ()=default
virtual const char *	name () const =0
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 std::unique_ptr< GrFragmentProcessor >	Make (const GrYUVATextureProxies &yuvaProxies, GrSamplerState samplerState, const GrCaps &, const SkMatrix &localMatrix=SkMatrix::I(), const SkRect *subset=nullptr, const SkRect *domain=nullptr)
Static Public Member Functions inherited from GrFragmentProcessor
static std::unique_ptr< GrFragmentProcessor >	MakeColor (SkPMColor4f color)
static std::unique_ptr< GrFragmentProcessor >	MulInputByChildAlpha (std::unique_ptr< GrFragmentProcessor > child)
static std::unique_ptr< GrFragmentProcessor >	ApplyPaintAlpha (std::unique_ptr< GrFragmentProcessor > child)
static std::unique_ptr< GrFragmentProcessor >	ModulateRGBA (std::unique_ptr< GrFragmentProcessor > child, const SkPMColor4f &color)
static std::unique_ptr< GrFragmentProcessor >	OverrideInput (std::unique_ptr< GrFragmentProcessor >, const SkPMColor4f &)
static std::unique_ptr< GrFragmentProcessor >	DisableCoverageAsAlpha (std::unique_ptr< GrFragmentProcessor >)
static std::unique_ptr< GrFragmentProcessor >	DestColor ()
static std::unique_ptr< GrFragmentProcessor >	SwizzleOutput (std::unique_ptr< GrFragmentProcessor >, const skgpu::Swizzle &)
static std::unique_ptr< GrFragmentProcessor >	ClampOutput (std::unique_ptr< GrFragmentProcessor >)
static std::unique_ptr< GrFragmentProcessor >	Compose (std::unique_ptr< GrFragmentProcessor > f, std::unique_ptr< GrFragmentProcessor > g)
static std::unique_ptr< GrFragmentProcessor >	ColorMatrix (std::unique_ptr< GrFragmentProcessor > child, const float matrix[20], bool unpremulInput, bool clampRGBOutput, bool premulOutput)
static std::unique_ptr< GrFragmentProcessor >	SurfaceColor ()
static std::unique_ptr< GrFragmentProcessor >	DeviceSpace (std::unique_ptr< GrFragmentProcessor >)
static std::unique_ptr< GrFragmentProcessor >	Rect (std::unique_ptr< GrFragmentProcessor >, GrClipEdgeType, SkRect)
static GrFPResult	Circle (std::unique_ptr< GrFragmentProcessor >, GrClipEdgeType, SkPoint center, float radius)
static GrFPResult	Ellipse (std::unique_ptr< GrFragmentProcessor >, GrClipEdgeType, SkPoint center, SkPoint radii, const GrShaderCaps &)
static std::unique_ptr< GrFragmentProcessor >	HighPrecision (std::unique_ptr< GrFragmentProcessor >)

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 Types inherited from GrFragmentProcessor
enum	OptimizationFlags : uint32_t {   kNone_OptimizationFlags , kCompatibleWithCoverageAsAlpha_OptimizationFlag = 0x1 , kPreservesOpaqueInput_OptimizationFlag = 0x2 , kConstantOutputForConstantInput_OptimizationFlag = 0x4 ,   kAll_OptimizationFlags }
Protected Member Functions inherited from GrFragmentProcessor
	GrFragmentProcessor (ClassID classID, OptimizationFlags optimizationFlags)
	GrFragmentProcessor (const GrFragmentProcessor &src)
OptimizationFlags	optimizationFlags () const
void	registerChild (std::unique_ptr< GrFragmentProcessor > child, SkSL::SampleUsage sampleUsage=SkSL::SampleUsage::PassThrough())
void	cloneAndRegisterAllChildProcessors (const GrFragmentProcessor &src)
void	setUsesSampleCoordsDirectly ()
void	setWillReadDstColor ()
void	setIsBlendFunction ()
void	mergeOptimizationFlags (OptimizationFlags flags)
Protected Member Functions inherited from GrProcessor
	GrProcessor (ClassID classID)
	GrProcessor (const GrProcessor &)=delete
GrProcessor &	operator= (const GrProcessor &)=delete
Static Protected Member Functions inherited from GrFragmentProcessor
static OptimizationFlags	ModulateForSamplerOptFlags (SkAlphaType alphaType, bool samplingDecal)
static OptimizationFlags	ModulateForClampedSamplerOptFlags (SkAlphaType alphaType)
static OptimizationFlags	ProcessorOptimizationFlags (const GrFragmentProcessor *fp)
static SkPMColor4f	ConstantOutputForConstantInput (const GrFragmentProcessor *fp, const SkPMColor4f &input)
Protected Attributes inherited from GrProcessor
const ClassID	fClassID

Detailed Description

Definition at line 28 of file GrYUVtoRGBEffect.h.

Member Function Documentation

clone()

std::unique_ptr< GrFragmentProcessor > GrYUVtoRGBEffect::clone ( ) const

overridevirtual

Makes a copy of this fragment processor that draws equivalently to the original. If the processor has child processors they are cloned as well.

Implements GrFragmentProcessor.

Definition at line 403 of file GrYUVtoRGBEffect.cpp.

                                                                 {
    return std::unique_ptr<GrFragmentProcessor>(new GrYUVtoRGBEffect(*this));
}

Make()

std::unique_ptr< GrFragmentProcessor > GrYUVtoRGBEffect::Make ( const GrYUVATextureProxies &  yuvaProxies, GrSamplerState  samplerState, const GrCaps &  caps, const SkMatrix &  localMatrix = SkMatrix::I(), const SkRect *  subset = nullptr, const SkRect *  domain = nullptr  )

static

Definition at line 53 of file GrYUVtoRGBEffect.cpp.

                                                                                  {
    SkASSERT(!subset || SkRect::Make(yuvaProxies.yuvaInfo().dimensions()).contains(*subset));
 
    int numPlanes = yuvaProxies.yuvaInfo().numPlanes();
    if (!yuvaProxies.isValid()) {
        return nullptr;
    }
 
    bool usesBorder = samplerState.wrapModeX() == GrSamplerState::WrapMode::kClampToBorder ||
                      samplerState.wrapModeY() == GrSamplerState::WrapMode::kClampToBorder;
    float planeBorders[4][4] = {};
    if (usesBorder) {
        border_colors(yuvaProxies, planeBorders);
    }
 
    bool snap[2] = {false, false};
    std::unique_ptr<GrFragmentProcessor> planeFPs[SkYUVAInfo::kMaxPlanes];
    for (int i = 0; i < numPlanes; ++i) {
        bool useSubset = SkToBool(subset);
        GrSurfaceProxyView view = yuvaProxies.makeView(i);
        SkMatrix planeMatrix = yuvaProxies.yuvaInfo().originMatrix();
        // The returned matrix is a view matrix but we need a local matrix.
        SkAssertResult(planeMatrix.invert(&planeMatrix));
        SkRect planeSubset;
        SkRect planeDomain;
        bool makeLinearWithSnap = false;
        auto [ssx, ssy] = yuvaProxies.yuvaInfo().planeSubsamplingFactors(i);
        SkASSERT(ssx > 0 && ssx <= 4);
        SkASSERT(ssy > 0 && ssy <= 2);
        float scaleX = 1.f;
        float scaleY = 1.f;
        if (ssx > 1 || ssy > 1) {
            scaleX = 1.f/ssx;
            scaleY = 1.f/ssy;
            // We would want to add a translation to this matrix to handle other sitings.
            SkASSERT(yuvaProxies.yuvaInfo().sitingX() == SkYUVAInfo::Siting::kCentered);
            SkASSERT(yuvaProxies.yuvaInfo().sitingY() == SkYUVAInfo::Siting::kCentered);
            planeMatrix.postConcat(SkMatrix::Scale(scaleX, scaleY));
            if (subset) {
                planeSubset = {subset->fLeft  *scaleX,
                               subset->fTop   *scaleY,
                               subset->fRight *scaleX,
                               subset->fBottom*scaleY};
            } else {
                planeSubset = SkRect::Make(view.dimensions());
            }
            if (domain) {
                planeDomain = {domain->fLeft  *scaleX,
                               domain->fTop   *scaleY,
                               domain->fRight *scaleX,
                               domain->fBottom*scaleY};
            }
            // If the image is not a multiple of the subsampling then the subsampled plane needs to
            // be tiled at less than its full width/height. This only matters when the mode is not
            // clamp.
            if (samplerState.wrapModeX() != GrSamplerState::WrapMode::kClamp) {
                int dx = (ssx*view.width() - yuvaProxies.yuvaInfo().width());
                float maxRight = view.width() - dx*scaleX;
                if (planeSubset.fRight > maxRight) {
                    planeSubset.fRight = maxRight;
                    useSubset = true;
                }
            }
            if (samplerState.wrapModeY() != GrSamplerState::WrapMode::kClamp) {
                int dy = (ssy*view.height() - yuvaProxies.yuvaInfo().height());
                float maxBottom = view.height() - dy*scaleY;
                if (planeSubset.fBottom > maxBottom) {
                    planeSubset.fBottom = maxBottom;
                    useSubset = true;
                }
            }
            // This promotion of nearest to linear filtering for UV planes exists to mimic
            // libjpeg[-turbo]'s do_fancy_upsampling option. We will filter the subsampled plane,
            // however we want to filter at a fixed point for each logical image pixel to simulate
            // nearest neighbor.
            if (samplerState.filter() == GrSamplerState::Filter::kNearest) {
                bool snapX = (ssx != 1),
                     snapY = (ssy != 1);
                makeLinearWithSnap = snapX || snapY;
                snap[0] |= snapX;
                snap[1] |= snapY;
                if (domain) {
                    // The outer YUVToRGB effect will ensure sampling happens at pixel centers
                    // within this plane.
                    planeDomain = {std::floor(planeDomain.fLeft)   + 0.5f,
                                   std::floor(planeDomain.fTop)    + 0.5f,
                                   std::floor(planeDomain.fRight)  + 0.5f,
                                   std::floor(planeDomain.fBottom) + 0.5f};
                }
            }
        } else {
            if (subset) {
                planeSubset = *subset;
            }
            if (domain) {
                planeDomain = *domain;
            }
        }
        if (useSubset) {
            if (makeLinearWithSnap) {
                // The plane is subsampled and we have an overall subset on the image. We're
                // emulating do_fancy_upsampling using linear filtering but snapping look ups to the
                // y-plane pixel centers. Consider a logical image pixel at the edge of the subset.
                // When computing the logical pixel color value we should use a 50/50 blend of two
                // values from the subsampled plane. Depending on where the subset edge falls in
                // actual subsampled plane, one of those values may come from outside the subset.
                // Hence, we use this custom inset factory which applies the wrap mode to
                // planeSubset but allows linear filtering to read pixels from the plane that are
                // just outside planeSubset.
                SkRect* domainRect = domain ? &planeDomain : nullptr;
                planeFPs[i] = GrTextureEffect::MakeCustomLinearFilterInset(std::move(view),
                                                                           kUnknown_SkAlphaType,
                                                                           planeMatrix,
                                                                           samplerState.wrapModeX(),
                                                                           samplerState.wrapModeY(),
                                                                           planeSubset,
                                                                           domainRect,
                                                                           {scaleX/2.f, scaleY/2.f},
                                                                           caps,
                                                                           planeBorders[i]);
            } else if (domain) {
                planeFPs[i] = GrTextureEffect::MakeSubset(std::move(view),
                                                          kUnknown_SkAlphaType,
                                                          planeMatrix,
                                                          samplerState,
                                                          planeSubset,
                                                          planeDomain,
                                                          caps,
                                                          planeBorders[i]);
            } else {
                planeFPs[i] = GrTextureEffect::MakeSubset(std::move(view),
                                                          kUnknown_SkAlphaType,
                                                          planeMatrix,
                                                          samplerState,
                                                          planeSubset,
                                                          caps,
                                                          planeBorders[i]);
            }
        } else {
            GrSamplerState planeSampler = samplerState;
            if (makeLinearWithSnap) {
                planeSampler = GrSamplerState(samplerState.wrapModeX(),
                                              samplerState.wrapModeY(),
                                              GrSamplerState::Filter::kLinear,
                                              samplerState.mipmapMode());
            }
            planeFPs[i] = GrTextureEffect::Make(std::move(view),
                                                kUnknown_SkAlphaType,
                                                planeMatrix,
                                                planeSampler,
                                                caps,
                                                planeBorders[i]);
        }
    }
    std::unique_ptr<GrFragmentProcessor> fp(
            new GrYUVtoRGBEffect(planeFPs,
                                 numPlanes,
                                 yuvaProxies.yuvaLocations(),
                                 snap,
                                 yuvaProxies.yuvaInfo().yuvColorSpace()));
    return GrMatrixEffect::Make(localMatrix, std::move(fp));
}

name()

const char * GrYUVtoRGBEffect::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 38 of file GrYUVtoRGBEffect.h.

{ return "YUVtoRGBEffect"; }

---

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

• third_party/skia/src/gpu/ganesh/effects/GrYUVtoRGBEffect.h
• third_party/skia/src/gpu/ganesh/effects/GrYUVtoRGBEffect.cpp