libvips/libsrc/inplace/im_insertplace.c

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/* @(#) Insert an image into another. Like im_insert, but an `in-place'
* @(#) operation. small must fit entirely inside big - no clipping is
* @(#) performed.
* @(#)
* @(#) int
* @(#) im_insertplace( big, small, x, y )
* @(#) IMAGE *big, *small;
* @(#) int x, y;
* @(#)
*
* Copyright: J. Cupitt
* Written: 15/06/1992
* 22/7/93 JC
* - im_incheck() added
* 16/8/94 JC
* - im_incheck() changed to im_makerw()
* 1/9/04 JC
* - checks bands/types/etc match (thanks Matt)
* - smarter pixel size calculations
* 5/12/06
* - im_invalidate() after paint
*/
/*
This file is part of VIPS.
VIPS is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <vips/intl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <vips/vips.h>
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif /*WITH_DMALLOC*/
/* Like im_insert, but perform an in-place insertion.
*/
int
im_insertplace( IMAGE *big, IMAGE *small, int x, int y )
{
Rect br, sr;
PEL *p, *q;
int z;
/* Check IO.
*/
if( im_rwcheck( big ) || im_incheck( small ) )
return( -1 );
/* Check compatibility.
*/
if( big->BandFmt != small->BandFmt || big->Bands != small->Bands ||
big->Coding != small->Coding ) {
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im_error( "im_insertplace",
"%s", _( "inputs differ in format" ) );
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return( -1 );
}
if( big->Coding != IM_CODING_NONE && big->Coding != IM_CODING_LABQ ) {
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im_error( "im_insertplace", "%s",
_( "input should be uncoded or IM_CODING_LABQ" ) );
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return( -1 );
}
/* Make rects for big and small.
*/
br.left = 0;
br.top = 0;
br.width = big->Xsize;
br.height = big->Ysize;
sr.left = x;
sr.top = y;
sr.width = small->Xsize;
sr.height = small->Ysize;
/* Small fits inside big?
*/
if( !im_rect_includesrect( &br, &sr ) ) {
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im_error( "im_insertplace",
"%s", _( "small not inside big" ) );
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return( -1 );
}
/* Loop, memcpying small to big.
*/
p = (PEL *) IM_IMAGE_ADDR( small, 0, 0 );
q = (PEL *) IM_IMAGE_ADDR( big, x, y );
for( z = 0; z < small->Ysize; z++ ) {
memcpy( (char *) q, (char *) p, IM_IMAGE_SIZEOF_LINE( small ) );
p += IM_IMAGE_SIZEOF_LINE( small );
q += IM_IMAGE_SIZEOF_LINE( big );
}
im_invalidate( big );
return( 0 );
}