#include <SkTriColorShader.h>

Inheritance diagram for SkTriColorShader:

Public Member Functions
	SkTriColorShader (bool isOpaque, bool usePersp)

ShaderType	type () const override

bool	update (const SkMatrix &ctmInv, const SkPoint pts[], const SkPMColor4f colors[], int index0, int index1, int index2)

Public Member Functions inherited from SkShaderBase
	~SkShaderBase () override

sk_sp< SkShader >	makeInvertAlpha () const

sk_sp< SkShader >	makeWithCTM (const SkMatrix &) const

virtual bool	isConstant () const

virtual ShaderType	type () const =0

virtual GradientType	asGradient (GradientInfo info=nullptr, SkMatrix localMatrix=nullptr) const

Context *	makeContext (const ContextRec &, SkArenaAlloc *) const

bool	asLuminanceColor (SkColor4f *) const

bool	appendRootStages (const SkStageRec &rec, const SkMatrix &ctm) const

virtual bool	appendStages (const SkStageRec &, const SkShaders::MatrixRec &) const =0

virtual SkImage *	onIsAImage (SkMatrix *, SkTileMode[2]) const

virtual SkRuntimeEffect *	asRuntimeEffect () const

Type	getFlattenableType () const override

virtual sk_sp< SkShader >	makeAsALocalMatrixShader (SkMatrix *localMatrix) const

Public Member Functions inherited from SkShader
virtual bool	isOpaque () const

SkImage *	isAImage (SkMatrix *localMatrix, SkTileMode xy[2]) const

bool	isAImage () const

sk_sp< SkShader >	makeWithLocalMatrix (const SkMatrix &) const

sk_sp< SkShader >	makeWithColorFilter (sk_sp< SkColorFilter >) const

sk_sp< SkShader >	makeWithWorkingColorSpace (sk_sp< SkColorSpace >) const

Public Member Functions inherited from SkFlattenable
	SkFlattenable ()

virtual Factory	getFactory () const =0

virtual const char *	getTypeName () const =0

virtual void	flatten (SkWriteBuffer &) const

virtual Type	getFlattenableType () const =0

sk_sp< SkData >	serialize (const SkSerialProcs *=nullptr) const

size_t	serialize (void memory, size_t memory_size, const SkSerialProcs =nullptr) const

Public Member Functions inherited from SkRefCntBase
	SkRefCntBase ()

virtual	~SkRefCntBase ()

bool	unique () const

void	ref () const

void	unref () const

Protected Member Functions
bool	appendStages (const SkStageRec &rec, const SkShaders::MatrixRec &) const override

Protected Member Functions inherited from SkShaderBase
	SkShaderBase ()

void	flatten (SkWriteBuffer &) const override

virtual bool	onAsLuminanceColor (SkColor4f *) const

Additional Inherited Members
Public Types inherited from SkShaderBase
enum class	ShaderType { M }

enum class	GradientType { kNone , M }

enum	Flags { kOpaqueAlpha_Flag = 1 << 0 }

Public Types inherited from SkFlattenable
enum	Type { kSkColorFilter_Type , kSkBlender_Type , kSkDrawable_Type , kSkDrawLooper_Type , kSkImageFilter_Type , kSkMaskFilter_Type , kSkPathEffect_Type , kSkShader_Type }

typedef sk_sp< SkFlattenable >(*	Factory) (SkReadBuffer &)

Static Public Member Functions inherited from SkShaderBase
static Type	GetFlattenableType ()

static sk_sp< SkShaderBase >	Deserialize (const void data, size_t size, const SkDeserialProcs procs=nullptr)

static void	RegisterFlattenables ()

static SkMatrix	ConcatLocalMatrices (const SkMatrix &parentLM, const SkMatrix &childLM)

Static Public Member Functions inherited from SkFlattenable
static Factory	NameToFactory (const char name[])

static const char *	FactoryToName (Factory)

static void	Register (const char name[], Factory)

static sk_sp< SkFlattenable >	Deserialize (Type, const void data, size_t length, const SkDeserialProcs procs=nullptr)

Detailed Description

Definition at line 18 of file SkTriColorShader.h.

Constructor & Destructor Documentation

◆ SkTriColorShader()

SkTriColorShader::SkTriColorShader	(	bool	isOpaque,
		bool	usePersp
	)

inline

Definition at line 20 of file SkTriColorShader.h.

20: fIsOpaque(isOpaque), fUsePersp(usePersp) {}

Member Function Documentation

◆ appendStages()

bool SkTriColorShader::appendStages	(	const SkStageRec &	,
		const SkShaders::MatrixRec &
	)		const

overrideprotectedvirtual

Adds stages to implement this shader. To ensure that the correct input coords are present in r,g MatrixRec::apply() must be called (unless the shader doesn't require it's input coords). The default impl creates shadercontext and calls that (not very efficient).

Implements SkShaderBase.

Definition at line 19 of file SkTriColorShader.cpp.

                                                                                          {
    rec.fPipeline->append(SkRasterPipelineOp::seed_shader);
    if (fUsePersp) {
        rec.fPipeline->append(SkRasterPipelineOp::matrix_perspective, &fM33);
    }
    rec.fPipeline->append(SkRasterPipelineOp::matrix_4x3, &fM43);
    return true;
}

◆ type()

ShaderType SkTriColorShader::type ( ) const

inlineoverridevirtual

Implements SkShaderBase.

Definition at line 22 of file SkTriColorShader.h.

22{ return ShaderType::kTriColor; }

◆ update()

bool SkTriColorShader::update	(	const SkMatrix &	ctmInv,
		const SkPoint	pts[],
		const SkPMColor4f	colors[],
		int	index0,
		int	index1,
		int	index2
	)

Definition at line 28 of file SkTriColorShader.cpp.

                                          {
    SkMatrix m, im;
    m.reset();
    m.set(0, pts[index1].fX - pts[index0].fX);
    m.set(1, pts[index2].fX - pts[index0].fX);
    m.set(2, pts[index0].fX);
    m.set(3, pts[index1].fY - pts[index0].fY);
    m.set(4, pts[index2].fY - pts[index0].fY);
    m.set(5, pts[index0].fY);
    if (!m.invert(&im)) {
        return false;
    }
 
    fM33.setConcat(im, ctmInv);
 
    auto c0 = skvx::float4::Load(colors[index0].vec()),
         c1 = skvx::float4::Load(colors[index1].vec()),
         c2 = skvx::float4::Load(colors[index2].vec());
 
    (c1 - c0).store(&fM43.fMat[0]);
    (c2 - c0).store(&fM43.fMat[4]);
    c0.store(&fM43.fMat[8]);
 
    if (!fUsePersp) {
        fM43.setConcat(fM43, fM33);
    }
    return true;
}

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

third_party/skia/src/shaders/SkTriColorShader.h
third_party/skia/src/shaders/SkTriColorShader.cpp

Public Member Functions

Protected Member Functions