BoxBlur Class Reference

Applies a box blur of fixed radius 2. Correspond to uniformly averaging values over a 5x5 square window. More...

#include <BoxBlur.hpp>

Public Member Functions
	BoxBlur (bool approximate, const std::string &name)
void	process (const Texture &src, Texture &dst)

Private Member Functions
void	resize (uint width, uint height)

Private Attributes
Program *	_blur2D
	Box blur program.
Program *	_blurArray
	Box blur program.
Program *	_blurCube
	Box blur program.
Program *	_blurCubeArray
	Box blur program.
Texture	_intermediate
	Intermediate texture.

Detailed Description

Applies a box blur of fixed radius 2. Correspond to uniformly averaging values over a 5x5 square window.

An approximate (checkboard pattern) version doing half as many fetches is available. his blur can be applied to 2D, cubemap, 2D arrays and cubemap arrays textures.

Constructor & Destructor Documentation

BoxBlur()

BoxBlur::BoxBlur	(	bool	approximate,
		const std::string &	name
	)

Constructor. Can use either an exhaustive 5x5 box blur (25 samples) or an approximate version with a checkerboard pattern (13 samples).

Parameters

approximate	toggles the approximate box blur
name	debug name for internal buffers

Member Function Documentation

process()

void BoxBlur::process	(	const Texture &	src,
		Texture &	dst
	)

Apply the blurring process to a given texture. 2D, cubemap and their array versions are supported.

Note

It is possible to use the same texture as input and output.

Parameters

src	the ID of the texture to process
dst	the destination texture

resize()

void BoxBlur::resize ( uint  width, uint  height  )

private

Handle screen resizing if needed.

Parameters

width	the new width to use
height	the new height to use

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

• src/engine/processing/BoxBlur.hpp
• src/engine/processing/BoxBlur.cpp