impeller::EllipsePathSource Class Reference

A PathSource object that provides path iteration for any ellipse inscribed within a Rect bounds. More...

#include <path_source.h>

Inheritance diagram for impeller::EllipsePathSource:

Public Member Functions
	EllipsePathSource (const Rect &bounds)
	~EllipsePathSource ()
FillType	GetFillType () const override
Rect	GetBounds () const override
bool	IsConvex () const override
void	Dispatch (PathReceiver &receiver) const override
Public Member Functions inherited from impeller::PathSource
virtual	~PathSource ()=default

Detailed Description

A PathSource object that provides path iteration for any ellipse inscribed within a Rect bounds.

Definition at line 90 of file path_source.h.

Constructor & Destructor Documentation

EllipsePathSource()

impeller::EllipsePathSource::EllipsePathSource ( const Rect &  bounds )

explicit

Definition at line 32 of file path_source.cc.

: bounds_(bounds) {}

~EllipsePathSource()

impeller::EllipsePathSource::~EllipsePathSource ( )

default

Member Function Documentation

Dispatch()

void impeller::EllipsePathSource::Dispatch ( PathReceiver &  receiver ) const

overridevirtual

Implements impeller::PathSource.

Definition at line 48 of file path_source.cc.

                                                             {
  Scalar left = bounds_.GetLeft();
  Scalar right = bounds_.GetRight();
  Scalar top = bounds_.GetTop();
  Scalar bottom = bounds_.GetBottom();
  Point center = bounds_.GetCenter();
 
  receiver.MoveTo(Point(left, center.y), true);
  receiver.ConicTo(Point(left, top), Point(center.x, top), kSqrt2Over2);
  receiver.ConicTo(Point(right, top), Point(right, center.y), kSqrt2Over2);
  receiver.ConicTo(Point(right, bottom), Point(center.x, bottom), kSqrt2Over2);
  receiver.ConicTo(Point(left, bottom), Point(left, center.y), kSqrt2Over2);
 
  receiver.Close();
}

References impeller::PathReceiver::Close(), impeller::PathReceiver::ConicTo(), impeller::TRect< T >::GetBottom(), impeller::TRect< T >::GetCenter(), impeller::TRect< T >::GetLeft(), impeller::TRect< T >::GetRight(), impeller::TRect< T >::GetTop(), impeller::kSqrt2Over2, impeller::PathReceiver::MoveTo(), impeller::TPoint< T >::x, and impeller::TPoint< T >::y.

Referenced by impeller::testing::TEST().

GetBounds()

Rect impeller::EllipsePathSource::GetBounds ( ) const

overridevirtual

Implements impeller::PathSource.

Definition at line 40 of file path_source.cc.

                                        {
  return bounds_;
}

Referenced by impeller::testing::TEST().

GetFillType()

FillType impeller::EllipsePathSource::GetFillType ( ) const

overridevirtual

Implements impeller::PathSource.

Definition at line 36 of file path_source.cc.

                                              {
  return FillType::kNonZero;
}

References impeller::kNonZero.

Referenced by impeller::testing::TEST().

IsConvex()

bool impeller::EllipsePathSource::IsConvex ( ) const

overridevirtual

Implements impeller::PathSource.

Definition at line 44 of file path_source.cc.

                                       {
  return true;
}

Referenced by impeller::testing::TEST().

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

• impeller/geometry/path_source.h
• impeller/geometry/path_source.cc