38 lines
1.1 KiB
Groff
38 lines
1.1 KiB
Groff
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.TH IM_WRITELINE 3 "22 April 1991"
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.SH NAME
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im_writeline \- writes a line of data in the image descriptor
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.SH SYNOPSIS
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.B #include <vips/vips.h>
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.B int im_writeline(ypos, image, buffer)
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.br
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.B int ypos;
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.br
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.B IMAGE *image;
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.br
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.B char *buffer;
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.SH DESCRIPTION
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.B im_writeline(3)
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writes the ypos line of an image held in buffer to either the output
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buffer image (previously set by im_setbuf(3)) or to an output file
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(previously set by im_openput(3)). The function provides uniform treatment of
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output irrespectively whether it is a file or a buffer image.
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You should be careful that the buffer does indeed contain enough data for a
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complete line of pels --- see lsize(3).
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Any evaluation callbacks which have been added to image are triggered --- see
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im_generate(3) and im_add_eval_callback(3).
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.SH BUGS
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This function changed in VIPS6:
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programs written previously must be modified by removing the last argument
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of the old im_writeline(3).
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.SH RETURN VALUE
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The function returns 0 on success and -1 on error.
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.SH SEE ALSO
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im_setbuf(3), im_openout(3), im_add_eval_callback(3).
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.SH COPYRIGHT
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N. Dessipris
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.SH AUTHOR
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N. Dessipris 23/04/1991
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