mirror of
https://github.com/python-pillow/Pillow.git
synced 2024-12-30 20:06:17 +03:00
62 lines
1.2 KiB
C
62 lines
1.2 KiB
C
/*
|
|
* 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;
|
|
|
|
ImagingCopyInfo(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;
|
|
}
|