mlib_imageblendmulti_fp(3mlib) [opensolaris man page]

mlib_ImageBlendMulti_Fp(3MLIB)				    mediaLib Library Functions				    mlib_ImageBlendMulti_Fp(3MLIB)

NAME

       mlib_ImageBlendMulti_Fp - blend multiple images

SYNOPSIS

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

       mlib_status mlib_ImageBlendMulti_Fp(mlib_image *dst,
	    const mlib_image **srcs, const mlib_image **alphas, const mlib_d64 *c,
	    mlib_s32 n);

DESCRIPTION

       The mlib_ImageBlendMulti_Fp() function blends multiple source images, using multiple alpha images, into a single destination image.

       All images involved should have the same data type and same size and the source and destination images should have the same number of chan-
       nels.  The alpha images should have either 1 channel or the same number of channels as the sources and destination.  A single-channel alpha
       image  would  be applied to all channels of the corresponding source image.  Single and multi-channel alpha images can be mixed in the same
       invocation.

       It uses the following equation:

			 n-1
			 SUM {alphas[k][x][y][j] * srcs[k][x][y][i]}
			 k=0
	 dst[x][y][i] = ---------------------------------------------
			 n-1
			 SUM {alphas[k][x][y][j]}
			 k=0

       or

				   n-1
	 dst[x][y][i] = c[i]	if SUM {alphas[k][x][y][j]} = 0
				   k=0

       where j = i for multi-channel alpha images; j = 0 for signle-channel alpha images.

PARAMETERS

       The function takes the following arguments:

       dst	 Pointer to destination image.

       srcs	 Pointer to an array of source images.

       alphas	 Pointer to an array of alpha images.

       c	 Background color.

       n	 Number of source images to be blended.

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	     |Committed 		   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       mlib_ImageBlendMulti(3MLIB), mlib_ImageBlend(3MLIB), mlib_ImageBlend_Fp(3MLIB), attributes(5)

SunOS 5.11							    2 Mar 2007					    mlib_ImageBlendMulti_Fp(3MLIB)

Check Out this Related Man Page

mlib_ImageBlendColor_Fp(3MLIB)				    mediaLib Library Functions				    mlib_ImageBlendColor_Fp(3MLIB)

NAME

       mlib_ImageBlendColor_Fp - blend an image and a color

SYNOPSIS

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

       mlib_status mlib_ImageBlendColor_Fp(mlib_image *dst, const mlib_image *src,
	    const mlib_d64 *color, mlib_s32 cmask);

DESCRIPTION

       The mlib_ImageBlendColor_Fp() 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_FLOAT and MLIB_DOUBLE images, the alpha coefficients are assumed to be in the range of [0.0, 1.0].

       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.

       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 attributes:

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

SEE ALSO

       mlib_ImageBlendColor_Fp_Inp(3MLIB), mlib_ImageBlendColor(3MLIB), mlib_ImageBlendColor_Inp(3MLIB), attributes(5)

SunOS 5.11							    2 Mar 2007					    mlib_ImageBlendColor_Fp(3MLIB)

Linux and UNIX Man Pages

mlib_imageblendmulti_fp(3mlib) [opensolaris man page]

Check Out this Related Man Page