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);
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.
The function takes the following arguments:
Pointer to destination or destination image.
Pointer to source or source image.
Pointer to the 8x8 dither mask, in row major order. The dither mask is transposed differently for different channels to reduce artifacts.
Scaling factor for dmask to convert the input integer coefficients into floating-point coefficients:
floating-point coefficient = integer coefficient * \ 2**(-scale)
Internal data structure for inverse color mapping.
The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE.
See attributes(5) for descriptions of the following attributes: