34 lines
937 B
Groff
34 lines
937 B
Groff
.TH IM_CIRCLE 3 "10 May 1991"
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.SH NAME
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im_circle \- draws a circle within an image file
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.SH SYNOPSIS
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.B #include <vips/vips.h>
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.B int im_circle(im, cx, cy, radius, intensity)
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.br
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.B IMAGE *im;
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.br
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.B int cx, cy;
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.br
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.B int radius, intensity;
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.SH DESCRIPTION
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.B im_circle()
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draws a circle on top of an image pointed by the image descriptor im.
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Input im should be one band unsigned char image.
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It must be stressed that a call to this function overwrites the content
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of the original image at the points corresponding to the drawn circle.
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The centre of the circle is at point (cx, cy) and has radius radius and
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the intensity of the produced circle is given by the int intensity (between
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0 and 255). If the circle does not fit in the original image, an error code
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is returned.
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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_line(3).
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.SH COPYRIGHT
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.br
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N. Dessipris
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.SH AUTHOR
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N. Dessipris \- 10/05/1991
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