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