mlib_imagecolortrue2indexinit(3mlib) [opensolaris man page]

mlib_ImageColorTrue2IndexInit(3MLIB)			    mediaLib Library Functions			      mlib_ImageColorTrue2IndexInit(3MLIB)

NAME

       mlib_ImageColorTrue2IndexInit - initialization for true color to indexed color conversion

SYNOPSIS

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

       mlib_status mlib_ImageColorTrue2IndexInit(void **colormap, mlib_s32 bits,
	    mlib_type intype, mlib_type outtype, mlib_s32 channels,
	    mlib_s32 entries, mlib_s32 offset, const void **table);

DESCRIPTION

       The  mlib_ImageColorTrue2IndexInit()  function creates and initializes an internal data structure based on the input lookup table and other
       parameters for inverse color mapping.

       The lookup table can have either three or four channels. The number of channels of the lookup table should match that of the  source  image
       provided to the function that will use the colormap structure created by this function.

       The type of the lookup table can be one of the following:

	 MLIB_BYTE in, MLIB_BYTE out (i.e., BYTE-to-BYTE)
	 MLIB_SHORT in, MLIB_SHORT out (i.e., SHORT-to-SHORT)
	 MLIB_SHORT in, MLIB_BYTE out (i.e., SHORT-to-BYTE)

       The  input  type  of  the lookup table should match the type of the destination image; the output type of the lookup table should match the
       source image type. The source and destination images are the images provided to the function that is going to use  the  colormap  structure
       created by mlib_ImageColorTrue2IndexInit() to do inverse color mapping.

PARAMETERS

       The function takes the following arguments:

       colormap    Internal data structure for inverse color mapping.

       bits	   Number of bits per color component used in the colorcube of the colormap structure. (If bits = 0, then no colorcube is created.
		   But the inverse color mapping might be done by using the original lookup table.)

       intype	   Data type of the source image and lookup table.

       outtype	   Data type of the destination indexed image.

       channels    Number of channels of the lookup table.

       entries	   Number of entries of the lookup table.

       offset	   The first entry offset of the lookup table.

       table	   The lookup table (LUT).

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_ImageColorErrorDiffusion3x3(3MLIB),    mlib_ImageColorOrderedDither8x8(3MLIB),    mlib_ImageColorTrue2Index(3MLIB),     mlib_ImageCol-
       orTrue2IndexFree(3MLIB), attributes(5)

SunOS 5.11							    2 Mar 2007				      mlib_ImageColorTrue2IndexInit(3MLIB)

Check Out this Related Man Page

mlib_ImageColorOrderedDither8x8(3MLIB)			    mediaLib Library Functions			    mlib_ImageColorOrderedDither8x8(3MLIB)

NAME

       mlib_ImageColorOrderedDither8x8 - true color to indexed color conversion using ordered dithering

SYNOPSIS

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

       mlib_status (mlib_image *dst, const mlib_image *src, const mlib_s32 *dmask, mlib_s32 scale, const void *colormap);

DESCRIPTION

       The  mlib_ImageColorOrderedDither8x8()  function  converts a true color image to a pseudo color image with the method of ordered dithering.
       The source image can be an MLIB_BYTE or MLIB_SHORT image with three or four channels. The destination must be a single-channel MLIB_BYTE or
       MLIB_SHORT image.

       This  function works only with a colorcube, rather than a general lookup table. The last parameter, colormap, is an internal data structure
       (which may include a colorcube) for inverse color mapping.  Create it by calling the mlib_ImageColorTrue2IndexInit() function.

PARAMETERS

       The function takes the following arguments:

       dst	       Pointer to destination or destination image.

       src	       Pointer to source or source image.

       dmask	       Pointer to the 8x8 dither mask, in row major order. The dither mask is transposed differently  for  different  channels	to
		       reduce artifacts.

       scale	       Scaling factor for dmask to convert the input integer coefficients into floating-point coefficients:

		       floating-point coefficient = integer coefficient * 2**(-scale)

       colormap        Internal data structure for inverse color mapping.

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_ImageColorErrorDiffusion3x3(3MLIB), mlib_ImageColorTrue2Index(3MLIB), mlib_ImageColorTrue2IndexFree(3MLIB), mlib_ImageColorTrue2Index-
       Init(3MLIB), attributes(5)

SunOS 5.10							    10 Nov 2004 			    mlib_ImageColorOrderedDither8x8(3MLIB)

Linux and UNIX Man Pages

mlib_imagecolortrue2indexinit(3mlib) [opensolaris man page]

Check Out this Related Man Page