mlib_ImageColorTrue2IndexImediaLibBLibrarymlib_ImageColorTrue2IndexInit(3MLIB)NAMEmlib_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 pro‐
vided 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 desti‐
nation 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 ALSOmlib_ImageColorErrorDiffusion3x3(3MLIB), mlib_ImageColorOrdered‐
Dither8x8(3MLIB), mlib_ImageColorTrue2Index(3MLIB), mlib_ImageCol‐
orTrue2IndexFree(3MLIB), attributes(5)SunOS 5.10 2 Mar 20mlib_ImageColorTrue2IndexInit(3MLIB)
