2010-07-31 06:52:47 +04:00
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/*
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* The Python Imaging Library
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* $Id$
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*
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* cut region from image
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*
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* history:
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* 95-11-27 fl Created
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* 98-07-10 fl Fixed "null result" error
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* 99-02-05 fl Rewritten to use Paste primitive
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*
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* Copyright (c) Secret Labs AB 1997-99.
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* Copyright (c) Fredrik Lundh 1995.
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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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ImagingCrop(Imaging imIn, int sx0, int sy0, int sx1, int sy1)
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{
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Imaging imOut;
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int xsize, ysize;
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int dx0, dy0, dx1, dy1;
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INT32 zero = 0;
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2013-07-01 02:42:19 +04:00
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2010-07-31 06:52:47 +04:00
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if (!imIn)
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return (Imaging) ImagingError_ModeError();
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xsize = sx1 - sx0;
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if (xsize < 0)
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xsize = 0;
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ysize = sy1 - sy0;
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if (ysize < 0)
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ysize = 0;
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imOut = ImagingNew(imIn->mode, xsize, ysize);
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if (!imOut)
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return NULL;
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ImagingCopyInfo(imOut, imIn);
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if (sx0 < 0 || sy0 < 0 || sx1 > imIn->xsize || sy1 > imIn->ysize)
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(void) ImagingFill(imOut, &zero);
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dx0 = -sx0;
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dy0 = -sy0;
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dx1 = imIn->xsize - sx0;
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dy1 = imIn->ysize - sy0;
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/* paste the source image on top of the output image!!! */
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if (ImagingPaste(imOut, imIn, NULL, dx0, dy0, dx1, dy1) < 0) {
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ImagingDelete(imOut);
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return NULL;
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}
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return imOut;
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}
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