Manual Pages for UNIX Operating System command usage for man mlib_ImageColorOrderedDitherMxN

mediaLib Library Functions
                           mlib_ImageColorOrderedDitherMxN(3MLIB)



NAME
     mlib_ImageColorOrderedDitherMxN  -  true-color  to  indexed-
     color  or grayscale to black-white conversion, using ordered
     dithering

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

     mlib_status mlib_ImageColorOrderedDitherMxN(mlib_image *dst,
          const mlib_image *src, const mlib_s32 **dmask, mlib_s32 m,
          mlib_s32 n, mlib_s32 scale, const void *colormap);


DESCRIPTION
     The mlib_ImageColorOrderedDitherMxN()  function  converts  a
     3-channel  image to a 1-channel indexed image, or converts a
     1-channel grayscale image to  a  1-channel  MLIB_BIT  image,
     with the method of ordered dithering.


     The src can be an MLIB_BYTE image with 1 or 3 channels.  The
     dst must be a 1-channel MLIB_BIT or MLIB_BYTE image.


     The colormap must be created by mlib_ImageColorDitherInit(),
     and it must have a colorcube included.


     The dither masks are required to  have  the  following  pro-
     perty:

       0 < dmask[i][j] < 2**scale; scale > 0


PARAMETERS
     The function takes the following arguments:

     dst         Pointer to destination image.


     src         Pointer to source image.


     dmask       Pointer to the dither masks, one per channel, in
                 row major order.


     m           Mask width. m > 1.





SunOS 5.11           Last change: 2 Mar 2007                    1






mediaLib Library Functions
                           mlib_ImageColorOrderedDitherMxN(3MLIB)



     n           Mask height. n > 1.


     scale       Scaling factor for dmask to  convert  the  input
                 integer coefficients into floating-point coeffi-
                 cients:

                   floating-point coefficient = integer coefficient * \
                   2**(-scale)



     colormap    Internal data structure for image dithering.


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_ImageColorDitherInit(3MLIB),
     mlib_ImageColorDitherFree(3MLIB),
     mlib_ImageColorErrorDiffusion3x3(3MLIB),
     mlib_ImageColorErrorDiffusionMxN(3MLIB),
     mlib_ImageColorOrderedDither8x8(3MLIB), attributes(5)














SunOS 5.11           Last change: 2 Mar 2007                    2






mediaLib Library Functions
                           mlib_ImageColorOrderedDitherMxN(3MLIB)






















































SunOS 5.11           Last change: 2 Mar 2007                    3