mlib_ImageConstDivShift(3MmediaLib Library Functmlib_ImageConstDivShift(3MLIB)NAMEmlib_ImageConstDivShift - division into a constant, with shifting
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>
mlib_status mlib_ImageConstDivShift(mlib_image *dst, const mlib_image *src,
const mlib_s32 *c, mlib_s32 shift);
DESCRIPTION
The mlib_ImageConstDivShift() function divides each pixel in an image
into a constant value on a pixel-by-pixel basis. It scales the result
by a left shift and writes the result to the destination image on a
pixel-by-pixel basis.
It uses the following equation:
dst[x][y][i] = c[i] / src[x][y][i] * 2**shift
In the case of src[x][y][i] = 0,
dst[x][y][i] = 0 if c[i] = 0
dst[x][y][i] = DATA_TYPE_MAX if c[i] > 0
dst[x][y][i] = DATA_TYPE_MIN if c[i] < 0
where DATA_TYPE is MLIB_U8, MLIB_S16, MLIB_U16, or MLIB_S32 for an
image of type MLIB_BYTE, MLIB_SHORT, MLIB_USHORT, or MLIB_INT, respec‐
tively.
PARAMETERS
The function takes the following arguments:
dst Pointer to destination image.
src Pointer to source image.
c Constant into which each pixel is divided. c[i] contains the
constant for channel i.
shift Left shifting factor. 0 ≤ shift ≤ 31.
RETURN VALUES
The function returns MLIB_SUCCESS if successful. Otherwise it returns
MLIB_FAILURE.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Committed │
├─────────────────────────────┼─────────────────────────────┤
│MT-Level │MT-Safe │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOmlib_ImageConstDiv(3MLIB), mlib_ImageConstDiv_Fp(3MLIB), mlib_ImageCon‐
stDiv_Fp_Inp(3MLIB), mlib_ImageConstDiv_Inp(3MLIB), mlib_ImageConstDi‐
vShift_Inp(3MLIB), attributes(5)SunOS 5.10 2 Mar 2007 mlib_ImageConstDivShift(3MLIB)
