/* @(#) Multiply two images
* @(#) Images must have the same no of bands and can be of any type
* @(#) No check for overflow is carried out.
* @(#)
* @(#) int
* @(#) im_multiply(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 JC
* - now works for partial images
* 1/7/93 JC
* - adapted for partial v2
* - ANSIfied
* 19/10/93 JC
* - coredump-inducing bug in complex*complex fixed
* 13/12/93
* - char*short bug fixed
* 12/6/95 JC
* - new im_add adapted to make new im_multiply
* 27/9/04
* - updated for 1 band $op n band image -> n band image case
* 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*/
/* Swap two IMAGE pointers.
*/
#define SWAP(A,B) { \
IMAGE *t; \
t = (A); (A) = (B); (B) = t; \
}
/* Complex multiply.
*/
#define cloop(TYPE) \
{\
TYPE *p1 = (TYPE *) in[0];\
TYPE *p2 = (TYPE *) in[1];\
TYPE *q = (TYPE *) out;\
\
for( x = 0; x < sz; x++ ) {\
double x1 = p1[0];\
double y1 = p1[1];\
double x2 = p2[0];\
double y2 = p2[1];\
\
p1 += 2;\
p2 += 2;\
\
q[0] = x1 * x2 - y1 * y2;\
q[1] = x1 * y2 + x2 * y1;\
\
q += 2;\
}\
}
/* Real multiply.
*/
#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
multiply_buffer( PEL **in, PEL *out, int width, IMAGE *im )
{
int x;
int sz = width * im->Bands;
/* Multiply 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_multiply_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 }
};
int
im_multiply( IMAGE *in1, IMAGE *in2, IMAGE *out )
{
/* Basic checks.
*/
if( im_piocheck( in1, out ) || im_pincheck( in2 ) )
return( -1 );
if( in1->Xsize != in2->Xsize || in1->Ysize != in2->Ysize ) {
im_error( "im_multiply", _( "not same size" ) );
return( -1 );
}
if( in1->Bands != in2->Bands &&
(in1->Bands != 1 && in2->Bands != 1) ) {
im_error( "im_multiply", _( "not same number of bands" ) );
return( -1 );
}
if( in1->Coding != IM_CODING_NONE || in2->Coding != IM_CODING_NONE ) {
im_error( "im_multiply", _( "not uncoded" ) );
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 );
/* Swap arguments to get the largest on the left.
*/
if( in1->Bbits < in2->Bbits )
SWAP( in1, in2 );
/* What output type will we write? int, float or complex.
*/
if( im_iscomplex( in1 ) || im_iscomplex( in2 ) ) {
/* Make sure we have complex on the left.
*/
if( !im_iscomplex( in1 ) )
SWAP( in1, in2 );
/* What kind of complex?
*/
if( in1->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 ) ) {
/* Make sure we have float on the left.
*/
if( !im_isfloat( in1 ) )
SWAP( in1, in2 );
/* What kind of float?
*/
if( in1->BandFmt == IM_BANDFMT_DOUBLE )
out->BandFmt = IM_BANDFMT_DOUBLE;
else
out->BandFmt = IM_BANDFMT_FLOAT;
}
else
/* Must be int+int = int.
*/
out->BandFmt = iformat[in2->BandFmt][in1->BandFmt];
/* And process!
*/
if( im__cast_and_call( in1, in2, out,
(im_wrapmany_fn) multiply_buffer, NULL ) )
return( -1 );
/* Success!
*/
return( 0 );
}