Content-type: text/html Man page of mlib_ImageBlendColor_Fp

mlib_ImageBlendColor_Fp

Section: mediaLib Library Functions (3MLIB)
Updated: 2 Mar 2007
Index Return to Main Contents
 

NAME

mlib_ImageBlendColor_Fp - blend an image and a color  

SYNOPSIS

cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>

mlib_status mlib_ImageBlendColor_Fp(mlib_image *dst, const mlib_image *src,
    const mlib_d64 *color, mlib_s32 cmask);

 

DESCRIPTION

The mlib_ImageBlendColor_Fp() 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 destination 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_FLOAT and MLIB_DOUBLE images, the alpha coefficients are assumed to be in the range of [0.0, 1.0].

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 TYPEATTRIBUTE VALUE

Interface StabilityCommitted

MT-Level

 

SEE ALSO

mlib_ImageBlendColor_Fp_Inp(3MLIB), mlib_ImageBlendColor(3MLIB), mlib_ImageBlendColor_Inp(3MLIB), attributes(5)


 

Index

NAME
SYNOPSIS
DESCRIPTION
PARAMETERS
RETURN VALUES
ATTRIBUTES
SEE ALSO

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Time: 02:38:08 GMT, October 02, 2010