mlib_ImageBlendColor(3MLIBmediaLib Library Functionmlib_ImageBlendColor(3MLIB)NAMEmlib_ImageBlendColor - blend an image and a color
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>
mlib_status mlib_ImageBlendColor(mlib_image *dst, const mlib_image *src,
const mlib_s32 *color, mlib_s32 cmask);
DESCRIPTION
The mlib_ImageBlendColor() function blends an image and a color with
the alpha channel.
It uses the following equation:
Cd = Cs*As + Cc*(1 - As)
Ad = 1.0
where, Cs and Cd are the RGB color components of the source and desti‐
nation images, respectively. As and Ad are the alpha components of the
source and destination images, respectively. Cc is the color component
of the constant color.
For MLIB_BYTE images, the alpha coefficients are in Q8 format. For
MLIB_SHORT images, the alpha coefficients are in Q15 format and must be
positive. For MLIB_USHORT images, the alpha coefficients are in Q16
format. For MLIB_INT images, the alpha coefficients are in Q31 format
and must be positive.
The images can have two to four channels. The length of color array
must not be less than the number of channels in the images.
PARAMETERS
The function takes the following arguments:
dst Pointer to destination image.
src Pointer to source image.
color Array of constant color components.
cmask Channel mask to indicate the alpha channel. Each bit of cmask
represents a channel in the image. The channel corresponding
to the highest bit with value 1 is the alpha channel.
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_ImageBlendColor_Inp(3MLIB), mlib_ImageBlendColor_Fp(3MLIB),
mlib_ImageBlendColor_Fp_Inp(3MLIB), attributes(5)SunOS 5.10 2 Mar 2007 mlib_ImageBlendColor(3MLIB)
