A geometry that is created from a stroked path object. More...

#include <stroke_path_geometry.h>

Inheritance diagram for impeller::StrokePathGeometry:

Public Member Functions
	StrokePathGeometry (const Path &path, Scalar stroke_width, Scalar miter_limit, Cap stroke_cap, Join stroke_join)

	~StrokePathGeometry ()

Scalar	GetStrokeWidth () const

Scalar	GetMiterLimit () const

Cap	GetStrokeCap () const

Join	GetStrokeJoin () const

Scalar	ComputeAlphaCoverage (const Entity &entity) const override

Public Member Functions inherited from impeller::Geometry
virtual bool	CoversArea (const Matrix &transform, const Rect &rect) const
	Determines if this geometry, transformed by the given `transform`, will completely cover all surface area of the given `rect`. More...

virtual bool	IsAxisAlignedRect () const

virtual bool	CanApplyMaskFilter () const

Friends
class	ImpellerBenchmarkAccessor

class	ImpellerEntityUnitTestAccessor

Additional Inherited Members
Static Public Member Functions inherited from impeller::Geometry
static std::shared_ptr< Geometry >	MakeFillPath (const Path &path, std::optional< Rect > inner_rect=std::nullopt)

static std::shared_ptr< Geometry >	MakeStrokePath (const Path &path, Scalar stroke_width=0.0, Scalar miter_limit=4.0, Cap stroke_cap=Cap::kButt, Join stroke_join=Join::kMiter)

static std::shared_ptr< Geometry >	MakeCover ()

static std::shared_ptr< Geometry >	MakeRect (const Rect &rect)

static std::shared_ptr< Geometry >	MakeOval (const Rect &rect)

static std::shared_ptr< Geometry >	MakeLine (const Point &p0, const Point &p1, Scalar width, Cap cap)

static std::shared_ptr< Geometry >	MakeCircle (const Point &center, Scalar radius)

static std::shared_ptr< Geometry >	MakeStrokedCircle (const Point &center, Scalar radius, Scalar stroke_width)

static std::shared_ptr< Geometry >	MakeRoundRect (const Rect &rect, const Size &radii)

static std::shared_ptr< Geometry >	MakePointField (std::vector< Point > points, Scalar radius, bool round)

Static Protected Member Functions inherited from impeller::Geometry
static GeometryResult	ComputePositionGeometry (const ContentContext &renderer, const Tessellator::VertexGenerator &generator, const Entity &entity, RenderPass &pass)

Detailed Description

A geometry that is created from a stroked path object.

Definition at line 13 of file stroke_path_geometry.h.

Constructor & Destructor Documentation

◆ StrokePathGeometry()

impeller::StrokePathGeometry::StrokePathGeometry	(	const Path &	path,
		Scalar	stroke_width,
		Scalar	miter_limit,
		Cap	stroke_cap,
		Join	stroke_join
	)

Definition at line 539 of file stroke_path_geometry.cc.

     : path_(path),
       stroke_width_(stroke_width),
       miter_limit_(miter_limit),
       stroke_cap_(stroke_cap),
       stroke_join_(stroke_join) {}

◆ ~StrokePathGeometry()

impeller::StrokePathGeometry::~StrokePathGeometry ( )

default

Member Function Documentation

◆ ComputeAlphaCoverage()

Scalar impeller::StrokePathGeometry::ComputeAlphaCoverage ( const Entity & entity ) const

overridevirtual

Reimplemented from impeller::Geometry.

Definition at line 568 of file stroke_path_geometry.cc.

                                                                           {
   Scalar scaled_stroke_width =
       entity.GetTransform().GetMaxBasisLengthXY() * stroke_width_;
   // If the stroke width is 0 or greater than kMinStrokeSizeMSAA, don't apply
   // any additional alpha. This is intended to match Skia behavior.
   if (scaled_stroke_width == 0.0 || scaled_stroke_width >= kMinStrokeSizeMSAA) {
     return 1.0;
   }
   // This scalling is eyeballed from Skia.
   return std::clamp(scaled_stroke_width * 20.0f, 0.f, 1.f);
 }

References impeller::Matrix::GetMaxBasisLengthXY(), and impeller::Entity::GetTransform().

◆ GetMiterLimit()

Scalar impeller::StrokePathGeometry::GetMiterLimit ( ) const

Definition at line 556 of file stroke_path_geometry.cc.

                                                {
   return miter_limit_;
 }

◆ GetStrokeCap()

Cap impeller::StrokePathGeometry::GetStrokeCap ( ) const

Definition at line 560 of file stroke_path_geometry.cc.

                                            {
   return stroke_cap_;
 }

◆ GetStrokeJoin()

Join impeller::StrokePathGeometry::GetStrokeJoin ( ) const

Definition at line 564 of file stroke_path_geometry.cc.

                                              {
   return stroke_join_;
 }

◆ GetStrokeWidth()

Scalar impeller::StrokePathGeometry::GetStrokeWidth ( ) const

Definition at line 552 of file stroke_path_geometry.cc.

                                                 {
   return stroke_width_;
 }

Friends And Related Function Documentation

◆ ImpellerBenchmarkAccessor

friend class ImpellerBenchmarkAccessor

friend

Definition at line 54 of file stroke_path_geometry.h.

◆ ImpellerEntityUnitTestAccessor

friend class ImpellerEntityUnitTestAccessor