Name | Synopsis | Description | Parameters | Return Values | Attributes | See Also
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);
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, respectively.
The function takes the following arguments:
Pointer to destination image.
Pointer to source image.
Constant into which each pixel is divided. c[i] contains the constant for channel i.
Left shifting factor. 0 ≤ shift ≤ 31.
The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE.
See attributes(5) for descriptions of the following attributes:
ATTRIBUTE TYPE |
ATTRIBUTE VALUE |
---|---|
Interface Stability |
Committed |
MT-Level |
MT-Safe |
mlib_ImageConstDiv(3MLIB), mlib_ImageConstDiv_Fp(3MLIB), mlib_ImageConstDiv_Fp_Inp(3MLIB), mlib_ImageConstDiv_Inp(3MLIB), mlib_ImageConstDivShift_Inp(3MLIB), attributes(5)
Name | Synopsis | Description | Parameters | Return Values | Attributes | See Also