mlib_ImageColorDitherFree(3MLIB) mediaLib Library Functions mlib_ImageColorDitherFree(3MLIB)NAME
mlib_ImageColorDitherFree - release the internal data structure for image dithering
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>
void mlib_ImageColorDitherFree(void *colormap);
DESCRIPTION
The mlib_ImageColorDitherFree() function releases an internal data structure, colormap, which was created by mlib_ImageColorDitherInit()
and was used by one of the following functions for image dithering:
mlib_ImageColorErrorDiffusion3x3
mlib_ImageColorErrorDiffusionMxN
mlib_ImageColorOrderedDither8x8
mlib_ImageColorOrderedDitherMxN
PARAMETERS
The function takes the following arguments:
colormap Internal data structure for image dithering.
RETURN VALUES
None.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Evolving |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO mlib_ImageColorDitherInit(3MLIB), mlib_ImageColorErrorDiffusion3x3(3MLIB), mlib_ImageColorErrorDiffusionMxN(3MLIB), mlib_ImageColorOrdered-
Dither8x8(3MLIB), mlib_ImageColorOrderedDitherMxN(3MLIB), attributes(5)SunOS 5.10 10 Nov 2004 mlib_ImageColorDitherFree(3MLIB)
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mlib_ImageColorOrderedDitherMxN(3MLIB) mediaLib Library Functions mlib_ImageColorOrderedDitherMxN(3MLIB)NAME
mlib_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 dithering.
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 coefficients 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 |Evolving |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO mlib_ImageColorDitherInit(3MLIB), mlib_ImageColorDitherFree(3MLIB), mlib_ImageColorErrorDiffusion3x3(3MLIB), mlib_ImageColorErrorDiffusion-
MxN(3MLIB), mlib_ImageColorOrderedDither8x8(3MLIB), attributes(5)SunOS 5.10 10 Nov 2004 mlib_ImageColorOrderedDitherMxN(3MLIB)