In filters that use Gaussian distributions, "sigma" is a size of one standard deviation in terms of the local space pixel grid of the filter input. In other words, this determines how wide the distribution stretches. More...

#include <sigma.h>

Public Member Functions
constexpr	Sigma ()=default

constexpr	Sigma (Scalar p_sigma)

	operator Radius () const

Public Attributes
Scalar	sigma = 0.0

Detailed Description

In filters that use Gaussian distributions, "sigma" is a size of one standard deviation in terms of the local space pixel grid of the filter input. In other words, this determines how wide the distribution stretches.

Definition at line 32 of file sigma.h.

Constructor & Destructor Documentation

◆ Sigma() [1/2]

constexpr impeller::Sigma::Sigma ( )

constexprdefault

◆ Sigma() [2/2]

constexpr impeller::Sigma::Sigma ( Scalar p_sigma )

inlineexplicitconstexpr

Definition at line 37 of file sigma.h.

37 : sigma(p_sigma) {}

impeller::Sigma::sigma

Scalar sigma

Definition: sigma.h:33

Member Function Documentation

◆ operator Radius()

impeller::Sigma::operator Radius ( ) const

Definition at line 11 of file sigma.cc.

                              {
   return Radius{sigma > 0.5f ? (sigma - 0.5f) * kKernelRadiusPerSigma : 0.0f};
 }

References impeller::kKernelRadiusPerSigma.

Member Data Documentation

◆ sigma

Scalar impeller::Sigma::sigma = 0.0

Definition at line 33 of file sigma.h.

Referenced by impeller::SolidRRectLikeBlurContents::GetCoverage(), impeller::FilterContents::MakeGaussianBlur(), impeller::SolidRRectLikeBlurContents::Render(), and impeller::testing::TEST_P().

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

impeller/geometry/sigma.h
impeller/geometry/sigma.cc

Public Member Functions

Public Attributes