ResizeGetSrcRoi

Computes the ROI of the source image for resizing by tile processing.

Syntax

Single precision

IppStatus ippiResizeGetSrcRoi_<mod>(const IppiResizeSpec_32f* pSpec, IppiPoint dstRoiOffset, IppiSize dstRoiSize, IppiPoint* srcRoiOffset, IppiSize* srcRoiSize);

Supported values for mod:

16u

16s

32f

Double precision

IppStatus ippiResizeGetSrcRoi_64f(const IppiResizeSpec_64f* pSpec, IppiPoint dstRoiOffset, IppiSize dstRoiSize, IppiPoint* srcRoiOffset, IppiSize* srcRoiSize);

Processing images with platform-aware functions

IppStatus ippiResizeGetSrcRoi_L(const IppiResizeSpec* pSpec, IppiPointL dstRoiOffset, IppiSizeL dstRoiSize, IppiPointL* srcRoiOffset, IppiSizeL* srcRoiSize);

Include Files

ippi.h

Flavors with the _L suffix: ippi_l.h

Domain Dependencies

Headers: ippcore.h, ippvm.h, ipps.h

Libraries: ippcore.lib, ippvm.lib, ipps.lib

Parameters

pSpec	Pointer to the spec structure for the resize filter.
dstRoiOffset	Offset of the tiled destination image ROI.
dstRoiSize	Size of the tiled destination image ROI.
srcRoiOffset	Offset of the source image ROI.
srcRoiSize	Pointer to the size of the source image ROI.

Description

This function computes the ROI of the processed source image using the processed ROI of the destination image for the corresponding resize transform by tile processing. The pSpec parameter defines the resize algorithm parameters. Prior to using the ippiResizeGetSrcRoi function, you need to initialize the pSpec parameter by calling one of the following functions: ippiResizeNearestInit, ippiResizeLinearInit, ippiResizeCubicInit, ippiResizeLanczosInit, or ippiResizeSuperInit.

Note

If the destination ROI size exceeds the image origin, the source ROI will be obtained for an intersection of the destination ROI and image origin.

Return Values

ippStsNoErr	Indicates no error.
ippStsNullPtrErr	Indicates an error if one of the specified pointers is NULL.
ippStsContextMatchErr	Indicates an error if pointer to the spec structure is invalid.
ippStsOutOfRangeErr	Indicates an error if the destination image offset point is outside the destination image origin.
ippStsSizeWrn	Indicates a warning if the destination ROI exceeds the destination image origin.