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/*
* The Python Imaging Library
* $Id$
*
* cut region from image
*
* history:
* 95-11-27 fl Created
* 98-07-10 fl Fixed "null result" error
* 99-02-05 fl Rewritten to use Paste primitive
*
* Copyright (c) Secret Labs AB 1997-99.
* Copyright (c) Fredrik Lundh 1995.
*
* See the README file for information on usage and redistribution.
*/
#include "Imaging.h"
Imaging
ImagingCrop(Imaging imIn, int sx0, int sy0, int sx1, int sy1) {
Imaging imOut;
int xsize, ysize;
int dx0, dy0, dx1, dy1;
INT32 zero = 0;
if (!imIn) {
return (Imaging)ImagingError_ModeError();
}
xsize = sx1 - sx0;
if (xsize < 0) {
xsize = 0;
}
ysize = sy1 - sy0;
if (ysize < 0) {
ysize = 0;
}
imOut = ImagingNewDirty(imIn->mode, xsize, ysize);
if (!imOut) {
return NULL;
}
ImagingCopyPalette(imOut, imIn);
if (sx0 < 0 || sy0 < 0 || sx1 > imIn->xsize || sy1 > imIn->ysize) {
(void)ImagingFill(imOut, &zero);
}
dx0 = -sx0;
dy0 = -sy0;
dx1 = imIn->xsize - sx0;
dy1 = imIn->ysize - sy0;
/* paste the source image on top of the output image!!! */
if (ImagingPaste(imOut, imIn, NULL, dx0, dy0, dx1, dy1) < 0) {
ImagingDelete(imOut);
return NULL;
}
return imOut;
}
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