avir::CImageResizerDithererErrdDIL< fptype, fptypesimd > Class Template Reference

#include <avir_dil.h>

Public Member Functions
void	dither (fptype *const ResScanline)
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
fptype *	ResScanlineDith
CBuffer< fptype >	ResScanlineDith0
double	TrMul0
const CImageResizerVars *	Vars

Detailed Description

template<class fptype, class fptypesimd>
class avir::CImageResizerDithererErrdDIL< fptype, fptypesimd >

Image resizer's error-diffusion dithering class, de-interleaved mode.

This ditherer implements error-diffusion dithering which looks good, and whose results are compressed by PNG well.

Template Parameters

fptype	Floating point type to use for storing pixel data. SIMD types cannot be used.
fptypesimd	Processing type, SIMD can be used.

Member Function Documentation

template<class fptype , class fptypesimd >

void avir::CImageResizerDithererErrdDIL< fptype, fptypesimd >::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.

Member Data Documentation

template<class fptype , class fptypesimd >

int avir::CImageResizerDithererErrdDIL< fptype, fptypesimd >::Len

protected

Scanline's length in pixels.

template<class fptype , class fptypesimd >

int avir::CImageResizerDithererErrdDIL< fptype, fptypesimd >::LenE

protected

= LenE * ElCount.

template<class fptype , class fptypesimd >

double avir::CImageResizerDithererErrdDIL< fptype, fptypesimd >::PkOut0

protected

Peak output value allowed.

template<class fptype , class fptypesimd >

fptype* avir::CImageResizerDithererErrdDIL< fptype, fptypesimd >::ResScanlineDith

protected

Error propagation buffer pointer which skips the first ElCount elements.

template<class fptype , class fptypesimd >

CBuffer< fptype > avir::CImageResizerDithererErrdDIL< fptype, fptypesimd >::ResScanlineDith0

protected

Error propagation buffer for dithering, first pixel unused.

template<class fptype , class fptypesimd >

double avir::CImageResizerDithererErrdDIL< fptype, fptypesimd >::TrMul0

protected

Bit-depth truncation multiplier.

template<class fptype , class fptypesimd >

const CImageResizerVars* avir::CImageResizerDithererErrdDIL< fptype, fptypesimd >::Vars

protected

Image resizing-related variables.