Pillow/src/libImaging/Copy.c

/*
 * The Python Imaging Library
 * $Id$
 *
 * copy image
 *
 * history:
 * 95-11-26 fl   Moved from Imaging.c
 * 97-05-12 fl   Added ImagingCopy2
 * 97-08-28 fl   Allow imOut == NULL in ImagingCopy2
 *
 * Copyright (c) Fredrik Lundh 1995-97.
 * Copyright (c) Secret Labs AB 1997.
 *
 * See the README file for details on usage and redistribution.
 */

#include "Imaging.h"

static Imaging
_copy(Imaging imOut, Imaging imIn) {
    ImagingSectionCookie cookie;
    int y;

    if (!imIn) {
        return (Imaging)ImagingError_ValueError(NULL);
    }

    imOut = ImagingNew2Dirty(imIn->mode, imOut, imIn);
    if (!imOut) {
        return NULL;
    }

    ImagingCopyPalette(imOut, imIn);

    ImagingSectionEnter(&cookie);
    if (imIn->block != NULL && imOut->block != NULL) {
        memcpy(imOut->block, imIn->block, imIn->ysize * imIn->linesize);
    } else {
        for (y = 0; y < imIn->ysize; y++) {
            memcpy(imOut->image[y], imIn->image[y], imIn->linesize);
        }
    }
    ImagingSectionLeave(&cookie);

    return imOut;
}

Imaging
ImagingCopy(Imaging imIn) {
    return _copy(NULL, imIn);
}

Imaging
ImagingCopy2(Imaging imOut, Imaging imIn) {
    return _copy(imOut, imIn);
}