mlib_ImageBlendMulti_Fp(3MmediaLib Library Functmlib_ImageBlendMulti_Fp(3MLIB)NAMEmlib_ImageBlendMulti_Fp - blend multiple images
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>
mlib_status mlib_ImageBlendMulti_Fp(mlib_image *dst,
const mlib_image **srcs, const mlib_image **alphas, const mlib_d64 *c,
mlib_s32 n);
DESCRIPTION
The mlib_ImageBlendMulti_Fp() function blends multiple source images,
using multiple alpha images, into a single destination image.
All images involved should have the same data type and same size and
the source and destination images should have the same number of chan‐
nels. The alpha images should have either 1 channel or the same number
of channels as the sources and destination. A single-channel alpha
image would be applied to all channels of the corresponding source
image. Single and multi-channel alpha images can be mixed in the same
invocation.
It uses the following equation:
n-1
SUM {alphas[k][x][y][j] * srcs[k][x][y][i]}
k=0
dst[x][y][i] = ---------------------------------------------
n-1
SUM {alphas[k][x][y][j]}
k=0
or
n-1
dst[x][y][i] = c[i] if SUM {alphas[k][x][y][j]} = 0
k=0
where j = i for multi-channel alpha images; j = 0 for signle-channel
alpha images.
PARAMETERS
The function takes the following arguments:
dst Pointer to destination image.
srcs Pointer to an array of source images.
alphas Pointer to an array of alpha images.
c Background color.
n Number of source images to be blended.
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_ImageBlendMulti(3MLIB), mlib_ImageBlend(3MLIB), mlib_Image‐
Blend_Fp(3MLIB), attributes(5)SunOS 5.10 2 Mar 2007 mlib_ImageBlendMulti_Fp(3MLIB)
