mlib_ImageColorOrderedDithmediaLibLLibramlib_ImageColorOrderedDitherMxN(3MLIB)NAMEmlib_ImageColorOrderedDitherMxN - true-color to indexed-color or
grayscale to black-white conversion, using ordered dithering
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>
mlib_status mlib_ImageColorOrderedDitherMxN(mlib_image *dst,
const mlib_image *src, const mlib_s32 **dmask, mlib_s32 m,
mlib_s32 n, mlib_s32 scale, const void *colormap);
DESCRIPTION
The mlib_ImageColorOrderedDitherMxN() function converts a 3-channel
image to a 1-channel indexed image, or converts a 1-channel grayscale
image to a 1-channel MLIB_BIT image, with the method of ordered dither‐
ing.
The src can be an MLIB_BYTE image with 1 or 3 channels. The dst must be
a 1-channel MLIB_BIT or MLIB_BYTE image.
The colormap must be created by mlib_ImageColorDitherInit(), and it
must have a colorcube included.
The dither masks are required to have the following property:
0 ≤ dmask[i][j] < 2**scale; scale > 0
PARAMETERS
The function takes the following arguments:
dst Pointer to destination image.
src Pointer to source image.
dmask Pointer to the dither masks, one per channel, in row major
order.
m Mask width. m > 1.
n Mask height. n > 1.
scale Scaling factor for dmask to convert the input integer coef‐
ficients into floating-point coefficients:
floating-point coefficient = integer coefficient * \
2**(-scale)
colormap Internal data structure for image dithering.
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_ImageColorDitherInit(3MLIB), mlib_ImageColorDitherFree(3MLIB),
mlib_ImageColorErrorDiffusion3x3(3MLIB), mlib_ImageColorErrorDiffusion‐
MxN(3MLIB), mlib_ImageColorOrderedDither8x8(3MLIB), attributes(5)SunOS 5.10 2 Mar mlib_ImageColorOrderedDitherMxN(3MLIB)
