Manual Pages for UNIX Operating System command usage for man mlib_ImageZoomBlend

mediaLib Library Functions             mlib_ImageZoomBlend(3MLIB)



NAME
     mlib_ImageZoomBlend - image scaling with alpha blending

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

     mlib_status mlib_ImageZoomBlend(mlib_image *dst, const mlib_image *src,
          mlib_d64 zoomx, mlib_d64 zoomy, mlib_filter filter, mlib_edge edge,
          mlib_blend blend, mlib_s32 alpha, mlib_s32 cmask);


DESCRIPTION
     The mlib_ImageZoomBlend() function will  enlarge  or  minify
     the  source  image  by the X and Y zoom factors and blend it
     with the destination image.


     This     function     is     a     special      case      of
     mlib_ImageZoomTranslateBlend() with the center of the source
     image being mapped to the center of the destination image.


     The center of the upper-left corner pixel  of  an  image  is
     considered to be located at (0.5, 0.5).


     Both src and dst must be of type MLIB_BYTE.  They  can  have
     either 3 or 4 channels.


     The src image cannot have width or height larger than 32767.

PARAMETERS
     The function takes the following arguments:

     dst       Pointer to destination image.


     src       Pointer to first source image.


     zoomx     X zoom factor. zoomx > 0.0.


     zoomy     Y zoom factor. zoomy > 0.0.


     filter    Type of resampling filter. It can be  one  of  the
               following:

                 MLIB_NEAREST



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mediaLib Library Functions             mlib_ImageZoomBlend(3MLIB)



                 MLIB_BILINEAR
                 MLIB_BICUBIC
                 MLIB_BICUBIC2



     edge      Type of edge condition. It can be one of the  fol-
               lowing:

                 MLIB_EDGE_DST_NO_WRITE
                 MLIB_EDGE_DST_FILL_ZERO
                 MLIB_EDGE_OP_NEAREST
                 MLIB_EDGE_SRC_EXTEND
                 MLIB_EDGE_SRC_EXTEND_INDEF
                 MLIB_EDGE_SRC_PADDED



     blend     Type of alpha blending. It can be one of the  fol-
               lowing:

                 MLIB_BLEND_GTK_SRC
                 MLIB_BLEND_GTK_SRC_OVER
                 MLIB_BLEND_GTK_SRC_OVER2



     alpha     Overall alpha for blending.


     cmask     Channel mask to indicate 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:















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mediaLib Library Functions             mlib_ImageZoomBlend(3MLIB)



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


SEE ALSO
     mlib_ImageZoomTranslateBlend(3MLIB),
     mlib_ImageZoomTranslateTableBlend(3MLIB), attributes(5)











































SunOS 5.11           Last change: 2 Mar 2007                    3