Manual Pages for UNIX Operating System command usage for man mlib_ImageBlendColor

mediaLib Library Functions            mlib_ImageBlendColor(3MLIB)



NAME
     mlib_ImageBlendColor - blend an image and a color

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

     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  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_BYTE images, the alpha coefficients are in Q8  for-
     mat.  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  posi-
     tive.


     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.






SunOS 5.11           Last change: 2 Mar 2007                    1






mediaLib Library Functions            mlib_ImageBlendColor(3MLIB)



     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  attri-
     butes:



     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Interface Stability         | Committed                   |
    |_____________________________|_____________________________|
    | MT-Level                    | MT-Safe                     |
    |_____________________________|_____________________________|


SEE ALSO
     mlib_ImageBlendColor_Inp(3MLIB),
     mlib_ImageBlendColor_Fp(3MLIB),
     mlib_ImageBlendColor_Fp_Inp(3MLIB), attributes(5)























SunOS 5.11           Last change: 2 Mar 2007                    2