mediaLib Library Functions           mlibImageMulAlphaFp(3MLIB)



NAME
     mlibImageMulAlphaFp - alpha channel multiplication

SYNOPSIS
     cc [ flag... ] file... -lmlib [ library... ]
     #include 

     mlibstatus mlibImageMulAlphaFp(mlibimage *dst, const mlibimage *src,
          mlibs32 cmask);


DESCRIPTION
     The mlibImageMulAlphaFp()  function  multiplies  floating-
     point  color  channels  by  the  alpha channel on a pixel by
     pixel basis.


     It uses the following equation:

       dst[x][y][c] = src[x][y][c] * src[x][y][a]



     where c and a are the indices for the color channels and the
     alpha channel, respectively, so c != a.

PARAMETERS
     The function takes the following arguments:

     dst      Pointer to destination image.


     src      Pointer to source image.


     cmask    Channel mask to indicate the  alpha  channel.  Each
              bit  of the mask represents a channel in the image.
              The channel corresponding to the 1 bit of cmask  is
              the alpha channel.


RETURN VALUES
     The function returns MLIBSUCES if  successful.  Otherwise
     it returns MLIBFAILURE.

ATRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:







SunOS 5.11           Last change: 2 Mar 2007                    1






mediaLib Library Functions           mlibImageMulAlphaFp(3MLIB)



     
           ATRIBUTE TYPE               ATRIBUTE VALUE       
    
     Interface Stability          Committed                   
    
     MT-Level                     MT-Safe                     
    


SEE ALSO
     mlibImageMulAlpha(3MLIB),    mlibImageMulAlphaInp(3MLIB),
     mlibImageMulAlphaFpInp(3MLIB), attributes(5)











































SunOS 5.11           Last change: 2 Mar 2007                    2