mlib_ImageInvert_Inp (3MLIB)

Name

mlib_ImageInvert_Inp - invert in place

Synopsis

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

mlib_status mlib_ImageInvert_Inp(mlib_image *srcdst);

Description

The mlib_ImageInvert_Inp() function performs the in-place inversion of an image such that white becomes black, light gray becomes dark gray, and so on.

It uses the following equation:

srcdst[x][y][i] = (Gwhite + Gblack) - srcdst[x][y][i]

The values of Gwhite and Gblack for different types of images are:

Image Type Gwhite Gblack Gwhite + Gblack MLIB_BYTE 255 0 255 (0xFF) MLIB_SHORT 32767 -32768 -1 (0xFFFF) MLIB_USHORT 65535 0 65535 (0xFFFF) MLIB_INT 2147483647 -2147483648 -1 (0xFFFFFFFF)

Given that integer data are in the two's complement representation, mlib_ImageInvert() is the same as mlib_ImageNot(), while mlib_ImageInvert_Inp() is the same as mlib_ImageNot_Inp().

Parameters

The function takes the following arguments:

srcdst

Pointer to source and destination image.

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_ImageInvert(3MLIB), mlib_ImageInvert_Fp(3MLIB), mlib_ImageInvert_Fp_Inp(3MLIB), attributes(5)