libvips/libsrc/arithmetic/im_add.c

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/* @(#) Add two vasari images
* @(#) Function im_add() assumes that the both input files
* @(#) are either memory mapped or in a buffer.
* @(#) Images must have the same no of bands and can be of any type
* @(#) No check for overflow is carried out.
* @(#)
* @(#) int
* @(#) im_add(in1, in2, out)
* @(#) IMAGE *in1, *in2, *out;
* @(#)
* @(#) Returns 0 on success and -1 on error
* @(#)
*
* Copyright: 1990, N. Dessipris.
*
* Author: Nicos Dessipris
* Written on: 02/05/1990
* Modified on:
* 29/4/93 J.Cupitt
* - now works for partial images
* 1/7/93 JC
* - adapted for partial v2
* 9/5/95 JC
* - simplified: now just handles 10 cases (instead of 50), using
* im_clip2*() to help
* - now uses im_wrapmany() rather than im_generate()
* 31/5/96 JC
* - SWAP() removed, *p++ removed
* 27/9/04
* - im__cast_and_call() now matches bands as well
* - ... so 1 band + 4 band image -> 4 band image
* 8/12/06
* - add liboil support
*/
/*
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 <math.h>
#include <assert.h>
#include <vips/vips.h>
#include <vips/internal.h>
#ifdef HAVE_LIBOIL
#include <liboil/liboil.h>
#endif /*HAVE_LIBOIL*/
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif /*WITH_DMALLOC*/
/* Complex add.
*/
#define cloop(TYPE) \
{\
TYPE *p1 = (TYPE *) in[0];\
TYPE *p2 = (TYPE *) in[1];\
TYPE *q = (TYPE *) out;\
\
for( x = 0; x < sz; x++ ) {\
double rp1 = p1[0];\
double ip1 = p1[1];\
\
double rp2 = p2[0];\
double ip2 = p2[1];\
\
p1 += 2;\
p2 += 2;\
\
q[0] = rp1 + rp2;\
q[1] = ip1 + ip2;\
\
q += 2;\
}\
}
/* Real add.
*/
#define rloop(TYPE) \
{\
TYPE *p1 = (TYPE *) in[0];\
TYPE *p2 = (TYPE *) in[1];\
TYPE *q = (TYPE *) out;\
\
for( x = 0; x < sz; x++ )\
q[x] = p1[x] + p2[x];\
}
static void
add_buffer( PEL **in, PEL *out, int width, IMAGE *im )
{
int x;
int sz = width * im->Bands;
/* Add all input types.
*/
switch( im->BandFmt ) {
case IM_BANDFMT_CHAR: rloop( signed char ); break;
case IM_BANDFMT_UCHAR: rloop( unsigned char ); break;
case IM_BANDFMT_SHORT: rloop( signed short ); break;
case IM_BANDFMT_USHORT: rloop( unsigned short ); break;
case IM_BANDFMT_INT: rloop( signed int ); break;
case IM_BANDFMT_UINT: rloop( unsigned int ); break;
case IM_BANDFMT_FLOAT:
#ifdef HAVE_LIBOIL
oil_add_f32( (float *) out,
(float *) in[0], (float *) in[1], sz );
#else /*!HAVE_LIBOIL*/
rloop( float );
#endif /*HAVE_LIBOIL*/
break;
case IM_BANDFMT_DOUBLE: rloop( double ); break;
case IM_BANDFMT_COMPLEX: cloop( float ); break;
case IM_BANDFMT_DPCOMPLEX: cloop( double ); break;
default:
assert( 0 );
}
}
/* Save a bit of typing.
*/
#define UC IM_BANDFMT_UCHAR
#define C IM_BANDFMT_CHAR
#define US IM_BANDFMT_USHORT
#define S IM_BANDFMT_SHORT
#define UI IM_BANDFMT_UINT
#define I IM_BANDFMT_INT
#define F IM_BANDFMT_FLOAT
#define M IM_BANDFMT_COMPLEX
#define D IM_BANDFMT_DOUBLE
#define DM IM_BANDFMT_DPCOMPLEX
/* Type conversions for two integer inputs. Rules for float and complex
* encoded with ifs. We are sign and value preserving.
*/
static int iformat[6][6] = {
/* UC C US S UI I */
/* UC */ { US, S, UI, I, UI, I },
/* C */ { S, S, I, I, I, I },
/* US */ { UI, I, UI, I, UI, I },
/* S */ { I, I, I, I, I, I },
/* UI */ { UI, I, UI, I, UI, I },
/* I */ { I, I, I, I, I, I }
};
/* Make an n-band image. Input 1 or n bands.
*/
static int
im__bandup( IMAGE *in, IMAGE *out, int n )
{
IMAGE *bands[256];
int i;
if( in->Bands == n )
return( im_copy( in, out ) );
if( in->Bands != 1 ) {
im_error( "im__bandup", _( "not one band or %d bands" ), n );
return( -1 );
}
if( n > 256 || n < 1 ) {
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im_error( "im__bandup", "%s", _( "bad bands" ) );
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return( -1 );
}
for( i = 0; i < n; i++ )
bands[i] = in;
return( im_gbandjoin( bands, out, n ) );
}
/* Convert in1 and in2 to the bands and type of out, and call the function.
* Also used by subtract, multiply, divide, etc.
*/
int
im__cast_and_call( IMAGE *in1, IMAGE *in2, IMAGE *out,
im_wrapmany_fn fn, void *a )
{
IMAGE *t[5];
if( im_open_local_array( out, t, 4, "type cast:1", "p" ) )
return( -1 );
/* Make sure bbits is set correctly.
*/
out->Bbits = im_bits_of_fmt( out->BandFmt );
/* Cast our input images up to the same type as the output.
*/
if( im_clip2fmt( in1, t[0], out->BandFmt ) ||
im_clip2fmt( in2, t[1], out->BandFmt ) )
return( -1 );
/* Force bands up to the same as out.
*/
if( im__bandup( t[0], t[2], out->Bands ) ||
im__bandup( t[1], t[3], out->Bands ) )
return( -1 );
/* And add!
*/
t[4] = NULL;
if( im_wrapmany( t + 2, out, fn, out, a ) )
return( -1 );
return( 0 );
}
int
im_add( IMAGE *in1, IMAGE *in2, IMAGE *out )
{
/* Basic checks.
*/
if( im_piocheck( in1, out ) || im_pincheck( in2 ) )
return( -1 );
if( in1->Bands != in2->Bands &&
(in1->Bands != 1 && in2->Bands != 1) ) {
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im_error( "im_add", "%s", _( "not same number of bands" ) );
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return( -1 );
}
if( in1->Coding != IM_CODING_NONE || in2->Coding != IM_CODING_NONE ) {
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im_error( "im_add", "%s", _( "not uncoded" ) );
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return( -1 );
}
if( im_cp_descv( out, in1, in2, NULL ) )
return( -1 );
/* What number of bands will we write?
*/
out->Bands = IM_MAX( in1->Bands, in2->Bands );
/* What output type will we write? int, float or complex.
*/
if( im_iscomplex( in1 ) || im_iscomplex( in2 ) ) {
/* What kind of complex?
*/
if( in1->BandFmt == IM_BANDFMT_DPCOMPLEX ||
in2->BandFmt == IM_BANDFMT_DPCOMPLEX )
/* Output will be DPCOMPLEX.
*/
out->BandFmt = IM_BANDFMT_DPCOMPLEX;
else
out->BandFmt = IM_BANDFMT_COMPLEX;
}
else if( im_isfloat( in1 ) || im_isfloat( in2 ) ) {
/* What kind of float?
*/
if( in1->BandFmt == IM_BANDFMT_DOUBLE ||
in2->BandFmt == IM_BANDFMT_DOUBLE )
out->BandFmt = IM_BANDFMT_DOUBLE;
else
out->BandFmt = IM_BANDFMT_FLOAT;
}
else
/* Must be int+int -> int.
*/
out->BandFmt = iformat[in1->BandFmt][in2->BandFmt];
/* And process!
*/
if( im__cast_and_call( in1, in2, out,
(im_wrapmany_fn) add_buffer, NULL ) )
return( -1 );
/* Success!
*/
return( 0 );
}