MMACH (lmmach) functions
LIBRARY ROUTINE
lvneg - Do the inversion of an image pixel by pixel, with an operation gating mask.
LIBRARY CALL
int
lvinv(xvimage *img1, xvimage *img2, int mflg, xvimage *img3)
INPUT
none
OUTPUT
none
RETURN VALUE
TRUE (1) on success, FALSE (0) on failure
DESCRIPTION
lvinv
will do the inversion of an image pixel by pixel.
img1 is an input image; img2 is the gating image, and mflg should be set to 1 if the gating image is to be used. img3 is the output image. Note that img1 can be used for both the input and the resulting output xvimage structure, in order to save space.
A non-zero mask pixel in img2 enables the output pixel to contain
the inversion. A zero mask pixel in img2 just transfers the value
of the corresponding pixel in img1 to the output pixel.
The input, output and the optional mask images must be of the same size,
data type, and have the same number of data bands.
ADDITIONAL INFORMATION
none
EXAMPLES
none
SIDE EFFECTS
none
RESTRICTIONS
lvinv
can be defined for all data types supported by Khoros, but at the moment it has been implemented just for the bit and unsigned char types.
Due to the simultaneous processing of 32 pixels in BIT images, input images of the BIT data type must be converted to a special data structure before the library is called. This can be accomplished by using the format routine. After the library call, the unformat routine can convert the image back to the BIT data type.
MODIFICATION
General modifications made by Luiz Fernando Vieira, Adriano Nagelschmidt Rodrigues
FILES
$MMACH/objects/library/lmmach/src/lvneg.c
SEE ALSO
lmmach(3)
COPYRIGHT
Copyright (C) 1993-1997 Junior Barrera, Roberto Lotufo. All rights reserved.