mlib_ImageScale_Fp_Inp - linear scaling, in place
cc [ flag... ] file... –lmlib [ library... ]
#include <mlib.h>
mlib_status mlib_ImageScale_Fp_Inp(mlib_image *srcdst,
const mlib_d64 *alpha, const mlib_d64 *beta);
The mlib_ImageScale_Fp_Inp() function performs a floating-point, in-place linear scaling on the pixels of the source image by multiplying the data by a scale factor, shifting, and then adding an offset.
The following equation is used:
srcdst[x][y][i] = srcdst[x][y][i] * alpha[i] + beta[i]
If the result of the operation underflows/overflows the minimum/maximum value supported by the destination image, then it will be clamped to the minimum/maximum value respectively.
The image can be of type MLIB_FLOAT or MLIB_DOUBLE.
The function takes the following arguments:
Pointer to source and destination image.
Scaling factor. alpha[i] contains the scaling factor for channel i.
Offset value. beta[i] contains the offset for channel i.
The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE.
See attributes(5) for descriptions of the following attributes:
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mlib_ImageScale(3MLIB), mlib_ImageScale_Fp(3MLIB), mlib_ImageScale_Inp(3MLIB), mlib_ImageScale2(3MLIB), mlib_ImageScale2_Inp(3MLIB), attributes(5)