mlib_ImageScale_Fp(3MLIB) mediaLib Library Functions mlib_ImageScale_Fp(3MLIB)NAMEmlib_ImageScale_Fp - linear scaling
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>
mlib_status mlib_ImageScale_Fp(mlib_image *dst, const mlib_image *src,
const mlib_d64 *alpha, const mlib_d64 *beta);
DESCRIPTION
The mlib_ImageScale_Fp() function performs a floating-point 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:
dst[x][y][i] = src[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.
See the following table for available variations of this linear scaling
function.
Type [*] BYTE SHORT USHORT INT FLOAT DOUBLE
────────────────────────────────────────────────────────────────────────────────────────
MLIB_FLOAT Y Y Y Y Y Y
────────────────────────────────────────────────────────────────────────────────────────
MLIB_DOUBLE Y Y Y Y Y Y
[*] Each row represents a source data type. Each column represents a
destination data type.
PARAMETERS
The function takes the following arguments:
dst Pointer to destination image.
src Pointer to source image.
alpha Scaling factor. alpha[i] contains the scaling factor for chan‐
nel i.
beta Offset value. beta[i] contains the offset for channel i.
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_ImageScale(3MLIB), mlib_ImageScale_Fp_Inp(3MLIB),
mlib_ImageScale_Inp(3MLIB), mlib_ImageScale2(3MLIB),
mlib_ImageScale2_Inp(3MLIB), attributes(5)SunOS 5.10 2 Mar 2007 mlib_ImageScale_Fp(3MLIB)
