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42 lines
762 B
C
42 lines
762 B
C
/*
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* The Python Imaging Library
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* $Id: Negative.c 2134 2004-10-06 08:55:20Z fredrik $
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*
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* negate image
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*
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* to do:
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* FIXME: Maybe this should be implemented using ImagingPoint()
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*
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* history:
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* 95-11-27 fl: Created
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*
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* Copyright (c) Fredrik Lundh 1995.
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* Copyright (c) Secret Labs AB 1997.
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*
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* See the README file for information on usage and redistribution.
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*/
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#include "Imaging.h"
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Imaging
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ImagingNegative(Imaging im)
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{
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Imaging imOut;
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int x, y;
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if (!im)
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return (Imaging) ImagingError_ModeError();
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imOut = ImagingNew(im->mode, im->xsize, im->ysize);
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if (!imOut)
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return NULL;
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for (y = 0; y < im->ysize; y++)
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for (x = 0; x < im->linesize; x++)
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imOut->image[y][x] = ~im->image[y][x];
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return imOut;
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}
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