#include <avir.h>

Inheritance diagram for avir::CImageResizerDithererDefINL< fptype >:

Public Member Functions
void	dither (fptype *const ResScanline) const

void	init (const int aLen, const CImageResizerVars &aVars, const double aTrMul, const double aPkOut)

Static Public Member Functions
static bool	isRecursive ()

Protected Attributes
int	Len

int	LenE

double	PkOut0

double	TrMul0

const CImageResizerVars *	Vars

Detailed Description

template<class fptype>
class avir::CImageResizerDithererDefINL< fptype >

Image resizer's default dithering class.

This class defines an object that performs rounding, clipping and dithering operations over horizontal scanline pixels before scanline is stored in the output buffer.

The ditherer should expect the same storage order of the pixels in a scanline as used in the "filtering step" class. So, a separate ditherer class should be defined for each scanline pixel storage style. The default ditherer implements a simple rounding without dithering: it can be used for an efficient dithering method which can be multi-threaded.

Template Parameters

fptype Floating point type to use for storing pixel data. SIMD types can be used.

Member Function Documentation

template<class fptype >

void avir::CImageResizerDithererDefINL< fptype >::dither ( fptype *const ResScanline ) const

Function performs rounding and clipping operations.

Parameters

ResScanline The buffer containing the final scanline.

template<class fptype >

void avir::CImageResizerDithererDefINL< fptype >::init	(	const int	aLen,
		const CImageResizerVars &	aVars,
		const double	aTrMul,
		const double	aPkOut
	)

Function initializes the ditherer object.

Parameters

aLen	Scanline length in pixels to process.
aVars	Image resizing-related variables.
aTrMul	Bit-depth truncation multiplier. 1 - no additional truncation.
aPkOut	Peak output value allowed.