mlib_ImageInvert_Inp(3MLIB) mediaLib Library Functions 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_ImageIn-
vert_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 |Evolving |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO mlib_ImageInvert(3MLIB), mlib_ImageInvert_Fp(3MLIB), mlib_ImageInvert_Fp_Inp(3MLIB), attributes(5)SunOS 5.10 10 Nov 2004 mlib_ImageInvert_Inp(3MLIB)
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mlib_ImageDivAlpha_Inp(3MLIB) mediaLib Library Functions mlib_ImageDivAlpha_Inp(3MLIB)NAME
mlib_ImageDivAlpha_Inp - alpha channel division, in place
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>
mlib_status mlib_ImageDivAlpha_Inp(mlib_image *srcdst, mlib_s32 cmask);
DESCRIPTION
The mlib_ImageDivAlpha_Inp() function divides color channels by the alpha channel on a pixel-by-pixel basis, in place.
For the MLIB_BYTE image, it uses the following equation:
srcdst[x][y][c] = srcdst[x][y][c] / (srcdst[x][y][a] * 2**(-8))
For the MLIB_SHORT image, it uses the following equation:
srcdst[x][y][c] = srcdst[x][y][c] / (srcdst[x][y][a] * 2**(-15))
For the MLIB_USHORT image, it uses the following equation:
srcdst[x][y][c] = srcdst[x][y][c] / (srcdst[x][y][a] * 2**(-16))
For the MLIB_INT image, it uses the following equation:
srcdst[x][y][c] = srcdst[x][y][c] / (srcdst[x][y][a] * 2**(-31))
where c and a are the indices for the color channels and the alpha channel, respectively, so c != a.
In the case of srcdst[x][y][a] = 0,
srcdst[x][y][c] = 0 if srcdst[x][y][c] = 0
srcdst[x][y][c] = DATA_TYPE_MAX if srcdst[x][y][c] > 0
srcdst[x][y][c] = DATA_TYPE_MIN if srcdst[x][y][c] < 0
where DATA_TYPE is MLIB_U8, MLIB_S16, MLIB_U16, or MLIB_S32 for an image of type MLIB_BYTE, MLIB_SHORT, MLIB_USHORT, or MLIB_INT, respec-
tively.
PARAMETERS
The function takes the following arguments:
srcdst Pointer to source and destination image.
cmask Channel mask to indicate the alpha channel. Each bit of the mask represents a channel in the image. The channel corresponding to
the 1 bit of cmask is the alpha channel.
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_ImageDivAlpha(3MLIB), mlib_ImageDivAlpha_Fp(3MLIB), mlib_ImageDivAlpha_Fp_Inp(3MLIB), attributes(5)SunOS 5.11 2 Mar 2007 mlib_ImageDivAlpha_Inp(3MLIB)