ResizeGetBufSize

Computes the size of the external buffer for image resizing.

Syntax

IppStatus ippiResizeGetBufSize(IppiRect srcRoi, IppiRect dstRoi, int nChannel, int interpolation, int* pBufferSize);

IppStatus ippiResizeGetBufSize_64f(IppiRect srcRoi, IppiRect dstRoi, int nChannel, int interpolation, int* pBufferSize);

Parameters

srcRoi	Region of interest in the source image (of the IppiRect type).
dstRoi	Region of interest in the destination image (of the IppiRect type).
nChannel	Number of channels or planes, possible values are 1, 3, 4.
interpolation	Specifies the interpolation mode. Use one of the following values:
	IPPI_INTER_NN - nearest neighbor interpolation
	IPPI_INTER_LINEAR - linear interpolation
	IPPI_INTER_CUBIC - cubic interpolation
	IPPI_INTER_LANCZOS - interpolation with Lanczos window
	IPPI_INTER_CUBIC2P_BSPLINE - B-spline
	IPPI_INTER_CUBIC2P_CATMULLROM - Catmull-Rom spline
	IPPI_INTER_CUBIC2P_B05C03 - special two-parameters cubic filter
	IPPI_INTER_SUPER - supersampling interpolation
	IPPI_SMOOTH_EDGE, or IPPI_SUBPIXEL_EDGE - edge smoothing in addition to one of the above modes
	IPPI_ANTIALIASING - antialiasing method in addition to the linear, cubic, or Lanczos modes.
pBuffer	Pointer to the external buffer.

Description

The function ippiResizeGetBufSize is declared in the ippi.h file. This function computes the size (in bytes) of the external buffer that is required for the function ippiResizeSqrPixel.

Return Values

ippStsNoErr	Indicates no error. Any other value indicates an error or a warning.
ippStsNullPtrErr	Indicates an error condition if pBufferSize pointer is NULL.
ippStsSizeErr	Indicates an error condition if width or height of the srcRoi or dstRoi is less than or equal to 0.
ippStsNumChannelErr	Indicates an error condition if nChannel has an illegal value.
ippStsInterpolationErr	Indicates an error condition if interpolation has an illegal value.
ippStsNoAntialiasing	Indicates a warning if the selected interpolation mode does not support antialiasing.