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

#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
	Scanline's length in pixels.

int	LenE
	= LenE * ElCount.

double	PkOut0
	Peak output value allowed.

fptype *	ResScanlineDith
	Error propagation buffer pointer which skips the first ElCount elements.

CBuffer< fptype >	ResScanlineDith0
	Error propagation buffer for dithering, first pixel unused.

double	TrMul0
	Bit-depth truncation multiplier.

const CImageResizerVars *	Vars
	Image resizing-related variables.

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.