mediaLib Library Functions              mlibImageBlendFp(3MLIB)



NAME
     mlibImageBlendFp - blend with an alpha image

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

     mlibstatus mlibImageBlendFp(mlibimage *dst, const mlibimage *src1,
          const mlibimage *src2, const mlibimage *alpha);


DESCRIPTION
     The mlibImageBlendFp() function blends two images together
     on  a  pixel-by-pixel basis using an alpha image, when alpha
     is also on a pixel basis. The alpha image can be  a  single-
     channel  image  or  have  the same number of channels as the
     source and destination images.


     It uses the following equation when the  alpha  image  is  a
     single-channel image:

       dst[x][y][i] = alpha[x][y][0]*src1[x][y][i] ]
                      (1 - alpha[x][y][0])*src2[x][y][i]



     It uses the following equation when the alpha image has  the
     same  number  of  channels  as  the  source  and destination
     images:

       dst[x][y][i] = alpha[x][y][i]*src1[x][y][i] ]
                      (1 - alpha[x][y][i])*src2[x][y][i]


PARAMETERS
     The function takes the following arguments:

     dst      Pointer to destination image.


     src1     Pointer to first source image.


     src2     Pointer to second source image.


     alpha    Alpha image used to control blending. The pixels in
              this image should have values in the range of [0.0,
              1.0].





SunOS 5.11           Last change: 2 Mar 2007                    1






mediaLib Library Functions              mlibImageBlendFp(3MLIB)



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

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



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


SEE ALSO
     mlibImageBlend(3MLIB),      mlibImageBlend1FpInp(3MLIB),
     mlibImageBlend1Inp(3MLIB), mlibImageBlend2FpInp(3MLIB),
     mlibImageBlend2Inp(3MLIB), attributes(5)
































SunOS 5.11           Last change: 2 Mar 2007                    2