libvips/libsrc/arithmetic/im_gaddim.c

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2007-08-29 18:23:50 +02:00
/* @(#) Generalised addition of two vasari images.
* @(#)Inputs, outputs are neither float nor double
* @(#) Result at each point is a*in1 + b*in2 + c
* @(#) Result depends on inputs, rounding is carried out;
* @(#) Function im_gaddim() assumes that the both input files
* @(#) are either memory mapped or in a buffer.
* @(#) Images must have the same no of bands and must not be complex
* @(#) No check for overflow is done;
* @(#)
* @(#) int im_gaddim(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:
*/
/*
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*/
/* This function works on either mmaped files or on images in buffer
*/
/* uchar char ushort short uint int */
static int array[6][6] = {
/* uchar */ { 2, 3, 2, 3, 4, 5 },
/* char */ { 3, 3, 3, 3, 5, 5 },
/* ushort */ { 2, 3, 2, 3, 4, 5 },
/* short */ { 3, 3, 3, 3, 5, 5 },
/* uint */ { 4, 5, 4, 5, 4, 5 },
/* int */ { 5, 5, 5, 5, 5, 5 }
};
#define select_tmp2_for_out_int(OUT) \
case IM_BANDFMT_UCHAR: select_tmp1_for_out_int(unsigned char, OUT); break; \
case IM_BANDFMT_CHAR: select_tmp1_for_out_int(signed char, OUT); break; \
case IM_BANDFMT_USHORT: select_tmp1_for_out_int(unsigned short, OUT); break; \
case IM_BANDFMT_SHORT: select_tmp1_for_out_int(signed short, OUT); break; \
case IM_BANDFMT_UINT: select_tmp1_for_out_int(unsigned int, OUT); break; \
case IM_BANDFMT_INT: select_tmp1_for_out_int(signed int, OUT); break; \
\
default: \
im_error("im_gaddim","Wrong tmp2 format(1)"); \
free( line); \
return(-1);
#define select_tmp1_for_out_int(IN2, OUT) \
switch(tmp1->BandFmt) { \
case IM_BANDFMT_UINT: loop(unsigned int, IN2, OUT); break; \
case IM_BANDFMT_INT: loop(int, IN2, OUT); break; \
default: im_error("im_gaddim","Wrong tmp2 format(2)");\
free( line);\
return(-1); \
}
#define select_tmp2_for_out_short(OUT) \
case IM_BANDFMT_UCHAR: select_tmp1_for_out_short(unsigned char, OUT); break; \
case IM_BANDFMT_CHAR: select_tmp1_for_out_short(signed char, OUT); break; \
case IM_BANDFMT_USHORT: select_tmp1_for_out_short(unsigned short, OUT); break; \
case IM_BANDFMT_SHORT: select_tmp1_for_out_short(signed short, OUT); break;
#define select_tmp1_for_out_short(IN2, OUT) \
switch(tmp1->BandFmt) { \
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; \
default: im_error("im_gaddim","Wrong image1 format(4)");\
free( line);\
return(-1); \
}
int im_gaddim(a, in1, b, in2, c, out)
IMAGE *in1, *in2, *out;
double a, b, c;
{
static int bb[] = { IM_BBITS_BYTE, IM_BBITS_BYTE, IM_BBITS_SHORT,
IM_BBITS_SHORT, IM_BBITS_INT, IM_BBITS_INT };
static int fmt[] = { IM_BANDFMT_UCHAR, IM_BANDFMT_CHAR,
IM_BANDFMT_USHORT, IM_BANDFMT_SHORT,
IM_BANDFMT_UINT, IM_BANDFMT_INT };
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))
{
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_gaddim"," Input images differ"); return(-1); }
if (in1->Coding != IM_CODING_NONE)
{ im_error("im_gaddim"," images must be uncoded"); 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;
default: im_error("im_gaddim"," 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;
default: im_error("im_gaddim"," Unable to accept image2");
return(-1);
}
/* Define the output */
result = array[first][second];
/* Prepare the output header */
if ( im_cp_desc(out, in1) == -1)
{ im_error("im_gaddim"," im_cp_desc failed"); return(-1); }
out->Bbits = bb[result];
out->BandFmt = fmt[result];
if( im_setupout(out) == -1)
{ im_error("im_gaddim"," 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++ = (OUT) \
(a*(*input1++)+b*(*input2++)+c +0.5);\
if (im_writeline(y, out, line) == -1) {\
free( line);\
return ( -1 );\
}\
}\
}
os = out->Xsize * out->Bands;
line = (PEL *) calloc ( (unsigned)os, sizeof(double) );
if (line == NULL)
{
im_error("im_gaddim"," Unable to calloc");
return(-1);
}
switch (out->BandFmt) {
case IM_BANDFMT_INT:
switch (tmp2->BandFmt) {
select_tmp2_for_out_int(int);
}
break;
case IM_BANDFMT_UINT:
switch (tmp2->BandFmt) {
select_tmp2_for_out_int(unsigned int);
}
break;
case IM_BANDFMT_SHORT:
switch (tmp2->BandFmt) {
select_tmp2_for_out_short(short);
}
break;
case IM_BANDFMT_USHORT:
switch (tmp2->BandFmt) {
select_tmp2_for_out_short(unsigned short);
}
break;
default:
im_error("im_gaddim"," Impossible output state");
free( line);
return(-1);
}
free( line);
return(0);
}