An abstract Geometry base class that produces fillable vertices representing the stroked outline from any |PathSource| provided by the subclass. More...

#include <stroke_path_geometry.h>

Inheritance diagram for impeller::StrokePathSourceGeometry:

Protected Member Functions
	StrokePathSourceGeometry (const StrokeParameters &parameters)

virtual const PathSource &	GetSource () const =0

std::optional< Rect >	GetCoverage (const Matrix &transform) const override

void	Dispatch (PathAndArcSegmentReceiver &receiver, Tessellator &tessellator, Scalar scale) const override

Protected Member Functions inherited from impeller::StrokeSegmentsGeometry
	StrokeSegmentsGeometry (const StrokeParameters &parameters)

std::optional< Rect >	GetStrokeCoverage (const Matrix &transform, const Rect &segment_bounds) const

Additional Inherited Members
Public Member Functions inherited from impeller::StrokeSegmentsGeometry
	~StrokeSegmentsGeometry () override

Scalar	GetStrokeWidth () const

Scalar	GetMiterLimit () const

Cap	GetStrokeCap () const

Join	GetStrokeJoin () const

Scalar	ComputeAlphaCoverage (const Matrix &transform) const override

Public Member Functions inherited from impeller::Geometry
virtual	~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`.

virtual bool	IsAxisAlignedRect () const

virtual bool	CanApplyMaskFilter () const

Static Public Member Functions inherited from impeller::Geometry
static std::unique_ptr< Geometry >	MakeFillPath (const flutter::DlPath &path, std::optional< Rect > inner_rect=std::nullopt)

static std::unique_ptr< Geometry >	MakeStrokePath (const flutter::DlPath &path, const StrokeParameters &stroke={})

static std::unique_ptr< Geometry >	MakeCover ()

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

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

static std::unique_ptr< Geometry >	MakeLine (const Point &p0, const Point &p1, const StrokeParameters &stroke)

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

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

static std::unique_ptr< Geometry >	MakeFilledArc (const Rect &oval_bounds, Degrees start, Degrees sweep, bool include_center)

static std::unique_ptr< Geometry >	MakeStrokedArc (const Rect &oval_bounds, Degrees start, Degrees sweep, const StrokeParameters &stroke)

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

static std::unique_ptr< Geometry >	MakeRoundSuperellipse (const Rect &rect, Scalar corner_radius)

static Scalar	ComputeStrokeAlphaCoverage (const Matrix &entity, Scalar stroke_width)
	Compute an alpha value to simulate lower coverage of fractional pixel strokes.

static GeometryResult	ComputePositionGeometry (const ContentContext &renderer, const Tessellator::VertexGenerator &generator, const Entity &entity, RenderPass &pass)

Detailed Description

An abstract Geometry base class that produces fillable vertices representing the stroked outline from any |PathSource| provided by the subclass.

Definition at line 94 of file stroke_path_geometry.h.

Constructor & Destructor Documentation

◆ StrokePathSourceGeometry()

impeller::StrokePathSourceGeometry::StrokePathSourceGeometry ( const StrokeParameters & parameters )

explicitprotected

Definition at line 839 of file stroke_path_geometry.cc.

841 : StrokeSegmentsGeometry(parameters) {}

impeller::StrokeSegmentsGeometry::StrokeSegmentsGeometry

StrokeSegmentsGeometry(const StrokeParameters &parameters)

Definition stroke_path_geometry.cc:714

Member Function Documentation

◆ Dispatch()

void impeller::StrokePathSourceGeometry::Dispatch	(	PathAndArcSegmentReceiver &	receiver,
		Tessellator &	tessellator,
		Scalar	scale
	)		const

overrideprotectedvirtual

Dispatch the path segments to the StrokePathSegmentReceiver for the provided transform scale.

Implements impeller::StrokeSegmentsGeometry.

Definition at line 848 of file stroke_path_geometry.cc.

                                                            {
  PathTessellator::PathToStrokedSegments(GetSource(), receiver);
}

References GetSource(), and impeller::PathTessellator::PathToStrokedSegments().

◆ GetCoverage()

std::optional< Rect > impeller::StrokePathSourceGeometry::GetCoverage ( const Matrix & transform ) const

overrideprotectedvirtual

Implements impeller::Geometry.

Definition at line 843 of file stroke_path_geometry.cc.

                                   {
  return GetStrokeCoverage(transform, GetSource().GetBounds());
}

References GetSource(), impeller::StrokeSegmentsGeometry::GetStrokeCoverage(), and transform.

◆ GetSource()

virtual const PathSource & impeller::StrokePathSourceGeometry::GetSource ( ) const

protectedpure virtual

The PathSource object that will be iterated to produce the raw vertices to be stroked.

Implemented in impeller::StrokeEllipseGeometry, impeller::StrokeRoundRectGeometry, impeller::StrokeRoundSuperellipseGeometry, impeller::StrokePathGeometry, impeller::StrokeDiffRoundRectGeometry, and impeller::StrokeDashedLineGeometry.

Referenced by Dispatch(), and GetCoverage().

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

impeller/entity/geometry/stroke_path_geometry.h
impeller/entity/geometry/stroke_path_geometry.cc

Protected Member Functions