opensolaris man page for mlib_imageconv4x4index

mlib_ImageConv4x4Index(3MLIB)				    mediaLib Library Functions				     mlib_ImageConv4x4Index(3MLIB)

NAME
       mlib_ImageConv4x4Index - 4x4 convolution on a color indexed image

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

       mlib_status mlib_ImageConv4x4Index(mlib_image *dst, const mlib_image *src,
	    const mlib_s32 *kernel, mlib_s32 scale, mlib_edge edge,
	    const void *colormap);

DESCRIPTION
       The mlib_ImageConv4x4Index() function performs a 4x4 convolution on the color indexed source image by using the user-supplied kernel.

       The input and output images must have the same image type and size.

       For this convolution, the key element of the convolution kernel is located at (1, 1) of the kernel matrix.

       This  function  performs  the  convolution  on color indexed image. The input image and the output image must be single channel images. The
       image type must be MLIB_BYTE or MLIB_SHORT.

       It uses the following equation:

			m-1-dm n-1-dn
	 dst[x][y][i] =  SUM	SUM  src[x+p][y+q][i]*k[p][q]*2**(-scale)
			p=-dm  q=-dn

       where m = 4, n = 4, dm = (m - 1)/2 = 1, dn = (n - 1)/2 = 1.

PARAMETERS
       The function takes the following arguments:

       dst	   Pointer to destination image.

       src	   Pointer to source image.

       kernel	   Pointer to the convolution kernel, in row major order.

       scale	   Scaling factor.

       edge	   Type of edge condition. It can be one of the following:

		     MLIB_EDGE_DST_NO_WRITE
		     MLIB_EDGE_DST_FILL_ZERO
		     MLIB_EDGE_DST_COPY_SRC
		     MLIB_EDGE_SRC_EXTEND

       colormap    Internal data structure for inverse color mapping. This data structure  is  generated  by  the  mlib_ImageColorTrue2IndexInit()
		   function.

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_ImageConv2x2(3MLIB),     mlib_ImageConv2x2_Fp(3MLIB),     mlib_ImageConv2x2Index(3MLIB),	 mlib_ImageConv3x3(3MLIB),     mlib_Image-
       Conv3x3_Fp(3MLIB),   mlib_ImageConv3x3Index(3MLIB),   mlib_ImageConv4x4(3MLIB),	 mlib_ImageConv4x4_Fp(3MLIB),	 mlib_ImageConv5x5(3MLIB),
       mlib_ImageConv5x5_Fp(3MLIB),	mlib_ImageConv5x5Index(3MLIB),	  mlib_ImageConv7x7(3MLIB),    mlib_ImageConv7x7_Fp(3MLIB),    mlib_Image-
       Conv7x7Index(3MLIB),  mlib_ImageConvKernelConvert(3MLIB),   mlib_ImageConvMxN(3MLIB),   mlib_ImageConvMxN_Fp(3MLIB),   mlib_ImageConvMxNIn-
       dex(3MLIB),   mlib_ImageConvolveMxN(3MLIB),   mlib_ImageConvolveMxN_Fp(3MLIB),	mlib_ImageSConv3x3(3MLIB),   mlib_ImageSConv3x3_Fp(3MLIB),
       mlib_ImageSConv5x5(3MLIB), mlib_ImageSConv5x5_Fp(3MLIB), mlib_ImageSConv7x7(3MLIB), mlib_ImageSConv7x7_Fp(3MLIB), mlib_ImageSConvKernelCon-
       vert(3MLIB), attributes(5)

SunOS 5.11							    2 Mar 2007					     mlib_ImageConv4x4Index(3MLIB)