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*/
// A simple example of changing an image size by different interpolation
// methods with antialiasing technique using Intel(R) Integrated Primitives (Intel(R) IPP) functions:
// ippiResizeGetSize_8u
// ippiResizeAntialiasingLinearInit
// ippiResizeGetBufferSize_8u
// ippiResizeAntialiasing_8u_C3R
#include <stdio.h>
#include "ipp.h"
#define SRC_WIDTH 128 /* source image width */
#define SRC_HEIGHT 64 /* source image height */
#define DST_WIDTH 64 /* source image width */
#define DST_HEIGHT 128 /* source image height */
/* Next two defines are created to simplify code reading and understanding */
#define EXIT_MAIN exitLine: /* Label for Exit */
#define check_sts(st) if((st) != ippStsNoErr) goto exitLine; /* Go to Exit if Intel(R) IPP function returned status different from ippStsNoErr */
/* Results of ippMalloc() are not validated because Intel(R) IPP functions perform bad arguments check and will return an appropriate status */
int main(void)
{
IppStatus status = ippStsNoErr;
Ipp8u* pSrc = NULL, *pDst = NULL; /* Pointers to source/destination images */
int srcStep = 0, dstStep = 0; /* Steps, in bytes through the source/destination images */
IppiSize srcSize = { SRC_WIDTH, SRC_HEIGHT }; /* Size of source ROI in pixels */
IppiSize dstSize = { DST_WIDTH, DST_HEIGHT }; /* Size of destination ROI in pixels */
Ipp8u *pBuffer = NULL; /* Pointer to the work buffer */
IppiResizeSpec_32f *pSpec = NULL;
Ipp8u *pInit = NULL;
int specSize = 0, initSize = 0, bufSize = 0;
IppiPoint dstOffset = { 0, 0 };
IppiInterpolationType interpolation = ippLinear;
IppiBorderType borderType = ippBorderRepl;
pSrc = ippiMalloc_8u_C3(srcSize.width, srcSize.height, &srcStep);
pDst = ippiMalloc_8u_C3(dstSize.width, dstSize.height, &dstStep);
/* Calculation of work buffer size */
check_sts( status = ippiResizeGetSize_8u(srcSize, dstSize, interpolation, 1, &specSize, &initSize) )
/* Memory allocation */
pSpec = (IppiResizeSpec_32f*)ippsMalloc_8u(specSize + initSize);
pInit = (Ipp8u*)pSpec + initSize;
/* Filter initialization */
check_sts( status = ippiResizeAntialiasingLinearInit(srcSize, dstSize, pSpec, pInit) )
check_sts( status = ippiResizeGetBufferSize_8u(pSpec, dstSize, 3, &bufSize) )
pBuffer = ippsMalloc_8u(bufSize);
/* Function call */
check_sts( status = ippiResizeAntialiasing_8u_C3R(pSrc, srcStep, pDst, dstStep, dstOffset, dstSize, borderType, 0, pSpec, pBuffer) )
EXIT_MAIN
ippiFree(pSrc);
ippiFree(pDst);
ippsFree(pSpec);
ippsFree(pBuffer);
printf("Exit status %d (%s)\n", (int)status, ippGetStatusString(status));
return (int)status;
}