#include <line_geometry.h>

Inheritance diagram for impeller::LineGeometry:

Public Member Functions
	LineGeometry (Point p0, Point p1, Scalar width, Cap cap)

	~LineGeometry ()=default

bool	CoversArea (const Matrix &transform, const Rect &rect) const override
	Determines if this geometry, transformed by the given `transform`, will completely cover all surface area of the given `rect`. More...

bool	IsAxisAlignedRect () const override

Public Member Functions inherited from impeller::Geometry
virtual GeometryResult::Mode	GetResultMode () const

virtual bool	CanApplyMaskFilter () const

virtual Scalar	ComputeAlphaCoverage (const Entity &entitys) const

Static Public Member Functions
static Scalar	ComputePixelHalfWidth (const Matrix &transform, Scalar width)

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)

Additional Inherited Members
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

Definition at line 13 of file line_geometry.h.

Constructor & Destructor Documentation

◆ LineGeometry()

impeller::LineGeometry::LineGeometry	(	Point	p0,
		Point	p1,
		Scalar	width,
		Cap	cap
	)

explicit

Definition at line 9 of file line_geometry.cc.

     : p0_(p0), p1_(p1), width_(width), cap_(cap) {
   FML_DCHECK(width >= 0);
 }

◆ ~LineGeometry()

impeller::LineGeometry::~LineGeometry ( )

default

Member Function Documentation

◆ ComputePixelHalfWidth()

Scalar impeller::LineGeometry::ComputePixelHalfWidth	(	const Matrix &	transform,
		Scalar	width
	)

static

Definition at line 14 of file line_geometry.cc.

                                                          {
   auto determinant = transform.GetDeterminant();
   if (determinant == 0) {
     return 0.0f;
   }
  
   Scalar min_size = 1.0f / sqrt(std::abs(determinant));
   return std::max(width, min_size) * 0.5f;
 }

References transform.

◆ CoversArea()

bool impeller::LineGeometry::CoversArea	(	const Matrix &	transform,
		const Rect &	rect
	)		const

overridevirtual

Determines if this geometry, transformed by the given transform, will completely cover all surface area of the given rect.

This is a conservative estimate useful for certain optimizations.

Returns: true if the transformed geometry is guaranteed to cover the given rect. May return false in many undetected cases where the transformed geometry does in fact cover the rect.

Reimplemented from impeller::Geometry.

Definition at line 123 of file line_geometry.cc.

                                                                              {
   if (!transform.IsTranslationScaleOnly() || !IsAxisAlignedRect()) {
     return false;
   }
   auto coverage = GetCoverage(transform);
   return coverage.has_value() ? coverage->Contains(rect) : false;
 }

References IsAxisAlignedRect(), and transform.

◆ IsAxisAlignedRect()

bool impeller::LineGeometry::IsAxisAlignedRect ( ) const

overridevirtual

Reimplemented from impeller::Geometry.

Definition at line 131 of file line_geometry.cc.

                                            {
   return cap_ != Cap::kRound && (p0_.x == p1_.x || p0_.y == p1_.y);
 }

References impeller::kRound, impeller::TPoint< T >::x, and impeller::TPoint< T >::y.

Referenced by CoversArea().

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

impeller/entity/geometry/line_geometry.h
impeller/entity/geometry/line_geometry.cc

Public Member Functions

Static Public Member Functions

Additional Inherited Members