mlib_ImageBlend2_Inp(3MLIB)				    mediaLib Library Functions				       mlib_ImageBlend2_Inp(3MLIB)

NAME

       mlib_ImageBlend2_Inp - blend with an alpha image, in place

SYNOPSIS

       cc [ flag... ] file... -lmlib [ library... ]
       #include <mlib.h>

       mlib_status mlib_ImageBlend2_Inp(mlib_image *src2dst, const mlib_image *src1, const mlib_image *alpha);

DESCRIPTION

       The  mlib_ImageBlend2_Inp()  function  blends  two images together, in place, 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:

       src2dst[x][y][i] = a[x][y][0]*src1[x][y][i] +
			  (1 - a[x][y][0])*src2dst[x][y][i]

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

       src2dst[x][y][i] = a[x][y][i]*src1[x][y][i] +
			  (1 - a[x][y][i])*src2dst[x][y][i]

PARAMETERS

       The function takes the following arguments:

       src2dst	       Pointer to second source and destination image.

       src1	       Pointer to first source image.

       alpha	       Alpha  image  used  to  control blending.  The a value equals (alpha * 2**(-8)) for MLIB_BYTE image, (alpha * 2**(-15)) for
		       MLIB_SHORT image, (alpha * 2**(-16)) for MLIB_USHORT image, and (alpha * 2**(-31)) for MLIB_INT image.

RETURN VALUES

       The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       mlib_ImageBlend(3MLIB),	   mlib_ImageBlend_Fp(3MLIB),	  mlib_ImageBlend1_Fp_Inp(3MLIB),     mlib_ImageBlend1_Inp(3MLIB),     mlib_Image-
       Blend2_Fp_Inp(3MLIB), attributes(5)

SunOS 5.10							    10 Nov 2004 				       mlib_ImageBlend2_Inp(3MLIB)