opensolaris man page for mlib_imageaffinetransformindex

mlib_ImageAffineTransformIndex(3MLIB)			    mediaLib Library Functions			     mlib_ImageAffineTransformIndex(3MLIB)

NAME
       mlib_ImageAffineTransformIndex - affine transformation on a color indexed image, checking the matrix first

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

       mlib_status mlib_ImageAffineTransformIndex(mlib_image *dst,
	    const mlib_image *src, const mlib_d64 *mtx, mlib_filter filter,
	    mlib_edge edge, const void *colormap);

DESCRIPTION
       The  mlib_ImageAffineTransformIndex()  function	does  affine transformation on a color indexed image, checking the matrix first and taking
       advantage of special cases.

       The following equation represents the affine transformation:

	 xd = a*xs + b*ys + tx
	 yd = c*xs + d*ys + ty

       where a point with coordinates (xs, ys) in the source image is mapped to a point with coordinates (xd, yd) in the destination image.

       The image data type must be MLIB_BYTE or MLIB_SHORT.

       The width and height of the destination image can be different from the width and height of the source image.

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

PARAMETERS
       The function takes the following arguments:

       dst	   Pointer to destination image.

       src	   Pointer to source image.

       mtx	   Transformation matrix. mtx[0] holds a; mtx[1] holds b; mtx[2] holds tx; mtx[3] holds c; mtx[4] holds d; mtx[5] holds ty.

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

		     MLIB_NEAREST
		     MLIB_BILINEAR
		     MLIB_BICUBIC
		     MLIB_BICUBIC2

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

		     MLIB_EDGE_DST_NO_WRITE
		     MLIB_EDGE_DST_FILL_ZERO
		     MLIB_EDGE_OP_NEAREST
		     MLIB_EDGE_SRC_EXTEND
		     MLIB_EDGE_SRC_PADDED

       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_ImageAffine(3MLIB), mlib_ImageAffine_Fp(3MLIB), mlib_ImageAffineIndex(3MLIB), mlib_ImageAffineTransform(3MLIB), mlib_ImageAffineTrans-
       form_Fp(3MLIB), attributes(5)

SunOS 5.11							    2 Mar 2007				     mlib_ImageAffineTransformIndex(3MLIB)