mediaLib Library Functions        mlibImageBlendColorInp(3MLIB)



NAME
     mlibImageBlendColorInp - blend an image and  a  color,  in
     place

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

     mlibstatus mlibImageBlendColorInp(mlibimage *srcdst,
          const mlibs32 *color, mlibs32 cmask);


DESCRIPTION
     The mlibImageBlendColorInp() 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 MLIBYTE images, the alpha coefficients are in Q8  for-
     mat.  For  MLIBSHORT  images, the alpha coefficients are in
     Q15 format and must be positive.   For  MLIBUSHORT  images,
     the  alpha  coefficients  are  in  Q16 format.  For MLIBINT
     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:

     srcdst    Pointer to the source and destination image.


     color     Array of constant color components.





SunOS 5.11           Last change: 2 Mar 2007                    1






mediaLib Library Functions        mlibImageBlendColorInp(3MLIB)



     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 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
     mlibImageBlendColor(3MLIB), mlibImageBlendColorFp(3MLIB),
     mlibImageBlendColorFpInp(3MLIB), attributes(5)



























SunOS 5.11           Last change: 2 Mar 2007                    2