SkBlurEngine Class Reference

#include <SkBlurEngine.h>

Classes
class	Algorithm

Public Member Functions
virtual	~SkBlurEngine ()=default
virtual const Algorithm *	findAlgorithm (SkSize sigma, SkColorType colorType) const =0

Detailed Description

SkBlurEngine is a backend-agnostic provider of blur algorithms. Each Skia backend defines a blur engine with a set of supported algorithms and/or implementations. A given implementation may be optimized for a particular color type, sigma range, or available hardware. Each engine and its algorithms are assumed to operate only on SkImages corresponding to its Skia backend, and will produce output SkImages of the same type.

Algorithms are allowed to specify a maximum supported sigma. If the desired sigma is higher than this, the input image and output region must be downscaled by the caller before invoking the algorithm. This is to provide the most flexibility for input representation (e.g. directly rasterize at half resolution or apply deferred filter effects during the first downsample pass).

skif::FilterResult::Builder::blur() is a convenient wrapper around the blur engine and automatically handles resizing.

Definition at line 34 of file SkBlurEngine.h.

Constructor & Destructor Documentation

~SkBlurEngine()

virtual SkBlurEngine::~SkBlurEngine ( )

virtualdefault

Member Function Documentation

findAlgorithm()

virtual const Algorithm * SkBlurEngine::findAlgorithm ( SkSize  sigma, SkColorType  colorType  ) const

pure virtual

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

• third_party/skia/src/core/SkBlurEngine.h