libvips/libsrc/arithmetic/im_gfadd.c

352 lines
9.9 KiB
C

/* @(#) Generalised addition of two vasari images. Result (double or float)
* @(#)depends on inputs
* @(#) Function im_gfadd() 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. If in doubt use im_clip2...
* @(#) Result at eachpoint is a*in1 + b*in2 + c
* @(#)
* @(#) int im_gfadd(a, in1, b, in2, c, out)
* @(#) double a, b, c;
* @(#) 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:
* 15/6/93 J.Cupitt
* - externs removed
* - casts added to please ANSI C
* - includes rationalised
*/
/*
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 <vips/vips.h>
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif /*WITH_DMALLOC*/
/* uchar char ushort short uint int float double */
static int array[8][8] = {
/* uchar */ { 0, 0, 0, 0, 0, 0, 0, 1 },
/* char */ { 0, 0, 0, 0, 0, 0, 0, 1 },
/* ushort */ { 0, 0, 0, 0, 0, 0, 0, 1 },
/* short */ { 0, 0, 0, 0, 0, 0, 0, 1 },
/* uint */ { 0, 0, 0, 0, 0, 0, 0, 1 },
/* int */ { 0, 0, 0, 0, 0, 0, 0, 1 },
/* float */ { 0, 0, 0, 0, 0, 0, 0, 1 },
/* double */ { 1, 1, 1, 1, 1, 1, 1, 1 }
};
#define select_outdouble(IN2, OUT)\
switch(tmp1->BandFmt) {\
case IM_BANDFMT_DOUBLE: loop(double, IN2, OUT); break;\
default: im_error("im_gfadd","Wrong tmp1 format(d)");\
free( line); return( -1 );\
}
#define outfloat_2uchar(IN2, OUT)\
case IM_BANDFMT_UCHAR: loop(unsigned char, IN2, OUT); break;\
case IM_BANDFMT_CHAR: loop(signed char, IN2, OUT); break;\
case IM_BANDFMT_USHORT: loop(unsigned short, IN2, OUT); break;\
case IM_BANDFMT_SHORT: loop(signed short, IN2, OUT); break;\
case IM_BANDFMT_UINT: loop(unsigned int, IN2, OUT); break;\
case IM_BANDFMT_INT: loop(signed int, IN2, OUT); break;\
case IM_BANDFMT_FLOAT: loop(float, IN2, OUT); break;
#define outfloat_2char(IN2, OUT)\
case IM_BANDFMT_CHAR: loop(signed char, IN2, OUT); break;\
case IM_BANDFMT_USHORT: loop(unsigned short, IN2, OUT); break;\
case IM_BANDFMT_SHORT: loop(signed short, IN2, OUT); break;\
case IM_BANDFMT_UINT: loop(unsigned int, IN2, OUT); break;\
case IM_BANDFMT_INT: loop(signed int, IN2, OUT); break;\
case IM_BANDFMT_FLOAT: loop(float, IN2, OUT); break;
#define outfloat_2ushort(IN2, OUT)\
case IM_BANDFMT_USHORT: loop(unsigned short, IN2, OUT); break;\
case IM_BANDFMT_SHORT: loop(signed short, IN2, OUT); break;\
case IM_BANDFMT_UINT: loop(unsigned int, IN2, OUT); break;\
case IM_BANDFMT_INT: loop(signed int, IN2, OUT); break;\
case IM_BANDFMT_FLOAT: loop(float, IN2, OUT); break;
#define outfloat_2short(IN2, OUT)\
case IM_BANDFMT_SHORT: loop(signed short, IN2, OUT); break;\
case IM_BANDFMT_UINT: loop(unsigned int, IN2, OUT); break;\
case IM_BANDFMT_INT: loop(signed int, IN2, OUT); break;\
case IM_BANDFMT_FLOAT: loop(float, IN2, OUT); break;
#define outfloat_2uint(IN2, OUT)\
case IM_BANDFMT_UINT: loop(unsigned int, IN2, OUT); break;\
case IM_BANDFMT_INT: loop(signed int, IN2, OUT); break;\
case IM_BANDFMT_FLOAT: loop(float, IN2, OUT); break;
#define outfloat_2int(IN2, OUT)\
case IM_BANDFMT_INT: loop(signed int, IN2, OUT); break;\
case IM_BANDFMT_FLOAT: loop(float, IN2, OUT); break;
#define outfloat_2float(IN2, OUT)\
case IM_BANDFMT_FLOAT: loop(float, IN2, OUT); break;
int im_gfadd(a, in1, b, in2, c, out)
double a, b, c;
IMAGE *in1, *in2, *out;
{
static int bb[] = { IM_BBITS_FLOAT, IM_BBITS_DOUBLE };
static int fmt[] = { IM_BANDFMT_FLOAT, IM_BANDFMT_DOUBLE };
int y, x;
int first, second, result;
IMAGE *tmp1, *tmp2;
PEL *line;
int os; /* size of a line of output image */
/* fd, data filename must have been set before the function is called
* Check whether they are set properly */
if ((im_iocheck(in1, out) == -1) || (im_iocheck(in2, out) == -1))
{ im_error("im_gfadd"," im_iocheck failed"); return( -1 ); }
/* Checks the arguments entered in in and prepares out */
if ( (in1->Xsize != in2->Xsize) || (in1->Ysize != in2->Ysize) ||
(in1->Bands != in2->Bands) || (in1->Coding != in2->Coding) )
{ im_error("im_gfadd"," Input images differ"); return( -1 );}
if (in1->Coding != IM_CODING_NONE)
{ im_error("im_gfadd"," images are coded"); return( -1 ); }
switch(in1->BandFmt) {
case IM_BANDFMT_UCHAR: first = 0; break;
case IM_BANDFMT_CHAR: first = 1; break;
case IM_BANDFMT_USHORT: first = 2; break;
case IM_BANDFMT_SHORT: first = 3; break;
case IM_BANDFMT_UINT: first = 4; break;
case IM_BANDFMT_INT: first = 5; break;
case IM_BANDFMT_FLOAT: first = 6; break;
case IM_BANDFMT_DOUBLE: first = 7; break;
default: im_error("im_gfadd"," unable to accept image1");
return( -1 );
}
switch(in2->BandFmt) {
case IM_BANDFMT_UCHAR: second = 0; break;
case IM_BANDFMT_CHAR: second = 1; break;
case IM_BANDFMT_USHORT: second = 2; break;
case IM_BANDFMT_SHORT: second = 3; break;
case IM_BANDFMT_UINT: second = 4; break;
case IM_BANDFMT_INT: second = 5; break;
case IM_BANDFMT_FLOAT: second = 6; break;
case IM_BANDFMT_DOUBLE: second = 7; break;
default: im_error("im_gfadd"," unable to accept image2");
return( -1 );
}
/* Define the output */
result = array[first][second];
/* Prepare output */
if ( im_cp_desc(out, in1) == -1)
{ im_error("im_gfadd"," im_cp_desc failed"); return( -1 ); }
out->Bbits = bb[result];
out->BandFmt = fmt[result];
if( im_setupout(out) == -1)
{ im_error("im_gfadd"," im_setupout failed"); return( -1 ); }
/* Order in1 and in2 */
if ( first >= second )
{ tmp1 = in1; tmp2 = in2; }
else
{ tmp1 = in2; tmp2 = in1; }
/* Define what we do for each band element type. */
#define loop(IN1, IN2, OUT)\
{ IN1 *input1 = (IN1 *) tmp1->data;\
IN2 *input2 = (IN2 *) tmp2->data;\
\
for (y=0; y <out->Ysize; y++) {\
OUT *cpline = (OUT*)line;\
for (x=0; x<os; x++)\
*cpline++ = (a*((OUT)*input1++) + \
b*((OUT)*input2++) + c);\
if (im_writeline(y, out, line) ) {\
im_error("im_gfadd"," im_writeline failed");\
free( line);\
return( -1 );\
}\
}\
}
os = out->Xsize * out->Bands;
line = (PEL *) calloc ( (unsigned)os, sizeof(double) );
if (line == NULL)
{ im_error("im_gfadd"," unable to calloc"); return( -1 ); }
switch (out->BandFmt) {
case IM_BANDFMT_DOUBLE:
switch (tmp2->BandFmt) {
case IM_BANDFMT_UCHAR:
select_outdouble(unsigned char, double);
break;
case IM_BANDFMT_CHAR:
select_outdouble(signed char, double);
break;
case IM_BANDFMT_USHORT:
select_outdouble(unsigned short, double);
break;
case IM_BANDFMT_SHORT:
select_outdouble(signed short, double);
break;
case IM_BANDFMT_UINT:
select_outdouble(unsigned int, double);
break;
case IM_BANDFMT_INT:
select_outdouble(signed int, double);
break;
case IM_BANDFMT_FLOAT:
select_outdouble(float, double);
break;
case IM_BANDFMT_DOUBLE:
select_outdouble(double, double);
break;
default:
im_error("im_gfadd","Wrong tmp2 format(d)");
free( line );
return( -1 );
}
break;
case IM_BANDFMT_FLOAT :
switch (tmp2->BandFmt) {
case IM_BANDFMT_UCHAR:
switch (tmp1->BandFmt) {
outfloat_2uchar(unsigned char, float);
default:
im_error("im_gfadd"," Error (a)");
free( line );
return( -1 );
}
break;
case IM_BANDFMT_CHAR:
switch (tmp1->BandFmt) {
outfloat_2char(signed char, float);
default:
im_error("im_gfadd"," Error (b)");
free( line); return( -1 );
}
break;
case IM_BANDFMT_USHORT:
switch (tmp1->BandFmt) {
outfloat_2ushort(unsigned short, float);
default:
im_error("im_gfadd"," Error (c)");
free( line); return( -1 );
}
break;
case IM_BANDFMT_SHORT:
switch (tmp1->BandFmt) {
outfloat_2short(signed short, float);
default:
im_error("im_gfadd"," Error (d)");
free( line); return( -1 );
}
break;
case IM_BANDFMT_UINT:
switch (tmp1->BandFmt) {
outfloat_2uint(unsigned int, float);
default:
im_error("im_gfadd"," Error (e)");
free( line); return( -1 );
}
break;
case IM_BANDFMT_INT:
switch (tmp1->BandFmt) {
outfloat_2int(signed int, float);
default:
im_error("im_gfadd"," Error (f)");
free( line );
return( -1 );
}
break;
case IM_BANDFMT_FLOAT:
switch (tmp1->BandFmt) {
outfloat_2float(float, float);
default:
im_error("im_gfadd"," Error (g)");
free( line );
return( -1 );
}
break;
default:
im_error("im_gfadd"," Wrong tmp2 format(f)");
free( line );
return( -1 );
}
break;
default:
im_error("im_gfadd"," Impossible output state");
free( line );
return( -1 );
}
free( line );
return( 0 );
}