avir::CLancIR::CResizeScanline Class Reference

#include <lancir.h>

Public Member Functions
void	reset ()
void	update (const double k, const double o0, const int ElCount, const int SrcLen, const int DstLen, CResizeFilters &rf)

Public Attributes
int	padl
int	padr
CResizePos *	pos
float *	sp

Protected Attributes
int	poslen
int	PrevDstLen
int	PrevElCount
double	Prevk
double	Prevo
int	PrevSrcLen
int	splen

Detailed Description

Class contains resizing positioning and a temporary scanline buffer, prepares source scanline positions for resize filtering.

Member Function Documentation

void avir::CLancIR::CResizeScanline::reset

(

)

Function "resets" *this object so that the next update() call fully updates the position buffer. Reset is necessary if the filter object was updated.

void avir::CLancIR::CResizeScanline::update	(	const double	k,
		const double	o0,
		const int	ElCount,
		const int	SrcLen,
		const int	DstLen,
		CResizeFilters &	rf
	)

Function updates resizing positions, updates "padl", "padr" and "pos" buffer.

Parameters

k	Resizing step.
o0	Initial source image offset.
SrcLen	Source image scanline length, used to create a scanline buffer without length pre-calculation.
DstLen	Destination image scanline length.
rf	Resizing filters object.

Member Data Documentation

int avir::CLancIR::CResizeScanline::padl

Left-padding (in pixels) required for source scanline. Available after the update() function call.

int avir::CLancIR::CResizeScanline::padr

Right-padding (in pixels) required for source scanline. Available after the update() function call.

CResizePos* avir::CLancIR::CResizeScanline::pos

Source scanline pointers (point to "sp") and filters for each destination pixel position. Available after the update() function call.

int avir::CLancIR::CResizeScanline::poslen

protected

Allocated "pos" buffer length.

int avir::CLancIR::CResizeScanline::PrevDstLen

protected

Previous DstLen.

int avir::CLancIR::CResizeScanline::PrevElCount

protected

Previous pixel element count.

double avir::CLancIR::CResizeScanline::Prevk

protected

Previous "k".

double avir::CLancIR::CResizeScanline::Prevo

protected

Previous "o".

int avir::CLancIR::CResizeScanline::PrevSrcLen

protected

Previous SrcLen.

float* avir::CLancIR::CResizeScanline::sp

Source scanline buffer, with "padl" and "padr" padding.

int avir::CLancIR::CResizeScanline::splen

protected

Allocated "sp" buffer length.