777 lines
15 KiB
C
777 lines
15 KiB
C
/* @(#) Function which read a mask from a file.
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* @(#) Result is written in the structure IMASK or DMASK depending on whether
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* @(#) the input mask is integer or double. The structure of the mask is
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* @(#) given in mask.h
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* @(#) The mask coefficients can be either int (INTMASK)
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* @(#) or double (DOUBLEMASK).
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* @(#)
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* @(#) Prints a mask. Used mainly for debugging purposes
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* @(#)
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* @(#) Usage
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* @(#) void im_print_dmask( m )
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* @(#) DOUBLEMASK *m;
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* @(#)
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* @(#) Usage
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* @(#) void im_print_imask( m )
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* @(#) INTMASK *m;
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* @(#)
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*
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* Copyright: 1990, N. Dessipris.
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*
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* Author: Nicos Dessipris
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* Written on: 29/04/1991
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* Modified on: 10/8/1992, J.Cupitt
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* - Mask reading routines no longer fail if scale and offset are missing.
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* Instead, they set default values of scale=1, offset=0.
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* - Code tidied up, better error recovery.
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* - Bugs fixed in im_dup_*mask. No longer coredump.
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* - Bugs fixed in im_write_*mask. Now work for non-square matricies.
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* - im_copy_*mask_matrix, im_copy_matrix_*mask added: copy VIPS mask
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* structures into Numerical Recipies in C style matricies and vice
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* versa. Both structures should have been built before copy attempted.
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* See im_create_*mask, im_*mat_alloc. The matrix should be indexed by 0
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* to size-1.
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* 9/7/93 JC
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* - some ANSIfication and tidies
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* - im_free_*mask() now return zero, so they can be used as close
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* callbacks.
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* 7/10/94 JC
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* - new IM_NEW(), IM_ARRAY() macros added
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* 27/4/95 JC
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* - oops! forgot to init IM_ARRAY() memory to zero
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* 7/8/96 JC
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* - im_scale_dmask rewritten
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* 7/5/98 JC
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* - im_read_*mask() rewritten, now more robust
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* - im_write_*mask() rewritten
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* - new functions im_write_*mask_name()
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* 28/7/99 JC
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* - im_create_imaskv(), im_create_dmaskv() make masks and init from
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* varargs
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* - tabs allowed as column separators
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* 9/2/05
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* - "," allowed as column separator ... helps CSV read
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* 31/5/06
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* - use g_ascii_strtod() and friends
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* 2006-09-08 tcv
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* - add im_norm_dmask()
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* 1/9/09
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* - move im_print_*mask() here
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* 12/11/09
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* - reading a float mask with im_read_imask() produced an incorrect
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* error messagge
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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 <stdarg.h>
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#include <string.h>
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#include <math.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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/* Size of line buffer for reading.
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*/
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#define IM_MAX_LINE (4096)
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/* Free mask structure and any attached arrays. Return zero, so we can use
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* these functions as close callbacks.
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*/
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int
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im_free_imask( INTMASK *m )
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{
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if( ! m )
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return 0;
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if( m->coeff )
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im_free( m->coeff );
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if( m->filename )
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im_free( m->filename );
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im_free( m );
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return( 0 );
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}
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int
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im_free_dmask( DOUBLEMASK *m )
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{
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if( ! m )
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return 0;
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if( m->coeff )
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im_free( m->coeff );
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if( m->filename )
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im_free( m->filename );
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im_free( m );
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return( 0 );
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}
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/* Create structures.
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*/
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INTMASK *
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im_create_imask( const char *filename, int xs, int ys )
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{
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INTMASK *m;
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int size = xs * ys;
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/* Check args.
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*/
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if( xs <= 0 || ys <= 0 || filename == NULL ) {
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im_error( "im_create_imask", "%s", _( "bad arguments" ) );
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return( NULL );
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}
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/* Allocate and initialise structure.
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*/
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if( !(m = IM_NEW( NULL, INTMASK )) )
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return( NULL );
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m->coeff = NULL;
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m->filename = NULL;
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m->scale = 1;
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m->offset = 0;
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m->xsize = 0;
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m->ysize = 0;
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if( !(m->coeff = IM_ARRAY( NULL, size, int )) ) {
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im_free_imask( m );
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return( NULL );
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}
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(void) memset( (char *) m->coeff, 0, size * sizeof( int ) );
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if( !(m->filename = im_strdup( NULL, filename )) ) {
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im_free_imask( m );
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return( NULL );
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}
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m->xsize = xs; m->ysize = ys;
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return( m );
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}
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INTMASK *
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im_create_imaskv( const char *filename, int xs, int ys, ... )
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{
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va_list ap;
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INTMASK *m;
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int i;
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if( !(m = im_create_imask( filename, xs, ys )) )
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return( NULL );
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va_start( ap, ys );
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for( i = 0; i < xs * ys; i++ )
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m->coeff[i] = va_arg( ap, int );
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va_end( ap );
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return( m );
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}
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DOUBLEMASK *
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im_create_dmask( const char *filename, int xs, int ys )
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{
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DOUBLEMASK *m;
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int size = xs * ys;
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/* Check args.
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*/
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if( xs <= 0 || ys <= 0 || filename == NULL ) {
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im_error( "im_create_dmask", "%s", _( "bad arguments" ) );
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return( NULL );
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}
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/* Allocate and initialise structure.
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*/
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if( !(m = IM_NEW( NULL, DOUBLEMASK )) )
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return( NULL );
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m->coeff = NULL;
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m->filename = NULL;
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m->scale = 1.0;
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m->offset = 0.0;
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m->xsize = 0;
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m->ysize = 0;
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if( !(m->coeff = IM_ARRAY( NULL, size, double )) ) {
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im_free_dmask( m );
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return( NULL );
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}
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(void) memset( (char *) m->coeff, 0, size * sizeof( double ) );
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if( !(m->filename = im_strdup( NULL, filename )) ) {
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im_free_dmask( m );
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return( NULL );
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}
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m->xsize = xs; m->ysize = ys;
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return( m );
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}
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DOUBLEMASK *
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im_create_dmaskv( const char *filename, int xs, int ys, ... )
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{
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va_list ap;
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DOUBLEMASK *m;
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int i;
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if( !(m = im_create_dmask( filename, xs, ys )) )
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return( NULL );
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va_start( ap, ys );
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for( i = 0; i < xs * ys; i++ )
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m->coeff[i] = va_arg( ap, double );
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va_end( ap );
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return( m );
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}
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/* Open for read.
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*/
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static FILE *
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open_read( const char *name )
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{
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FILE *fp;
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if( !(fp = fopen( name, "r" )) ) {
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im_error( "read_mask", _( "Unable to open \"%s\" for input" ),
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name );
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return( NULL );
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}
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return( fp );
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}
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/* Read a line from a file!
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*/
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static int
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get_line( FILE *fp, char *buf )
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{
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if( !fgets( buf, IM_MAX_LINE, fp ) ) {
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im_error( "read_mask", "%s", _( "unexpected EOF" ) );
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return( -1 );
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}
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return( 0 );
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}
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/* width, height, optional scale, optional offset.
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*/
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static int
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read_header( FILE *fp, int *xs, int *ys, double *scale, double *offset )
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{
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char buf[IM_MAX_LINE];
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char *p, *q;
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double v[4];
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int i;
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/* Read the first line: should contain size and optional
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* scale + offset.
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*/
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if( get_line( fp, buf ) )
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return( -1 );
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/* Read as space separated doubles. \n is in the break list because
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* our line will (usually) have a trailing \n which we want to count
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* as whitespace.
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*/
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p = buf;
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for( i = 0, p = buf;
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i < 4 && (q = im_break_token( p, " \t\n" ));
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i++, p = q )
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v[i] = g_ascii_strtod( p, NULL );
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if( (i != 2 && i != 4) ||
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ceil( v[0] ) != v[0] ||
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ceil( v[1] ) != v[1] ||
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v[0] <= 0 ||
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v[1] <= 0 ) {
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im_error( "read_header",
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"%s", _( "error reading matrix header" ) );
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return( -1 );
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}
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if( i == 4 && v[2] == 0 ) {
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im_error( "read_header",
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"%s", _( "scale should be non-zero" ) );
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return( -1 );
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}
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*xs = v[0];
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*ys = v[1];
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if( i == 2 ) {
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*scale = 1.0;
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*offset = 0.0;
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}
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else {
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*scale = v[2];
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*offset = v[3];
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}
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return( 0 );
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}
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/* Read matrix files.
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*/
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DOUBLEMASK *
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im_read_dmask( const char *maskfile )
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{
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FILE *fp;
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double sc, off;
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int xs, ys;
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DOUBLEMASK *m;
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int x, y, i, size;
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char buf[IM_MAX_LINE];
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if( !(fp = open_read( maskfile )) )
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return( NULL );
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if( read_header( fp, &xs, &ys, &sc, &off ) ) {
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fclose( fp );
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return( NULL );
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}
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if( !(m = im_create_dmask( maskfile, xs, ys )) ) {
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fclose( fp );
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return( NULL );
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}
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m->scale = sc;
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m->offset = off;
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size = xs * ys;
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for( i = 0, y = 0; y < ys; y++ ) {
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char *p;
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if( get_line( fp, buf ) ) {
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im_free_dmask( m );
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fclose( fp );
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return( NULL );
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}
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for( p = buf, x = 0; p && x < xs;
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x++, i++, p = im_break_token( p, " \t,\";" ) )
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m->coeff[i] = g_ascii_strtod( p, NULL );
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}
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fclose( fp );
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return( m );
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}
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/* INTMASK ... read as double, check for intness.
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*/
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INTMASK *
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im_read_imask( const char *maskfile )
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{
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DOUBLEMASK *dmask;
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INTMASK *imask;
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int i;
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if( !(dmask = im_read_dmask( maskfile )) )
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return( NULL );
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if( ceil( dmask->scale ) != dmask->scale ||
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ceil( dmask->offset ) != dmask->offset ) {
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im_error( "im_read_imask",
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"%s", _( "scale and offset should be int" ) );
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im_free_dmask( dmask );
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return( NULL );
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}
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for( i = 0; i < dmask->xsize * dmask->ysize; i++ )
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if( ceil( dmask->coeff[i] ) != dmask->coeff[i] ) {
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im_error( "im_read_imask", _( "cofficient at "
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"position (%d, %d) is not int" ),
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i % dmask->xsize,
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i / dmask->xsize );
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im_free_dmask( dmask );
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return( NULL );
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}
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if( !(imask = im_create_imask( maskfile,
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dmask->xsize, dmask->ysize )) ) {
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im_free_dmask( dmask );
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return( NULL );
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}
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imask->scale = dmask->scale;
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imask->offset = dmask->offset;
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for( i = 0; i < dmask->xsize * dmask->ysize; i++ )
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imask->coeff[i] = dmask->coeff[i];
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im_free_dmask( dmask );
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return( imask );
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}
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INTMASK *
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im_scale_dmask( DOUBLEMASK *m, const char *name )
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{
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const int size = m->xsize * m->ysize;
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INTMASK *out;
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double maxval, dsum;
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int i;
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int isum;
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if( !name || m->xsize <= 0 || m->ysize <= 0 ) {
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im_error( "im_scale_dmask", "%s", _( "bad arguments" ) );
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return( NULL );
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}
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if( !(out = im_create_imask( name, m->xsize, m->ysize )) )
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return( NULL );
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/* Find mask max.
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*/
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maxval = m->coeff[0];
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for( i = 0; i < size; i++ )
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if( m->coeff[i] > maxval )
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maxval = m->coeff[i];
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/* Copy and scale, setting max to 100.
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*/
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for( i = 0; i < size; i++ )
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out->coeff[i] = IM_RINT( m->coeff[i] * 100.0 / maxval );
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out->offset = m->offset;
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/* Set the scale to match the adjustment to max.
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*/
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isum = 0;
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dsum = 0.0;
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for( i = 0; i < size; i++ ) {
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isum += out->coeff[i];
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dsum += m->coeff[i];
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}
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if( dsum == m->scale )
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out->scale = isum;
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else
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out->scale = IM_RINT( m->scale * isum / dsum );
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return( out );
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}
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void
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im_norm_dmask( DOUBLEMASK *mask )
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{
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const int n = mask->xsize * mask->ysize;
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const double scale = 1.0 / mask->scale;
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int i;
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if( 1.0 == scale && 0.0 == mask->offset )
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return;
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for( i = 0; i < n; i++ )
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mask->coeff[i] = mask->coeff[i] * scale + mask->offset;
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mask->scale = 1.0;
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mask->offset = 0.0;
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}
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INTMASK *
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im_dup_imask( INTMASK *m, const char *name )
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{
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const int xs = m->xsize;
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const int ys = m->ysize;
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const int size = xs * ys;
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INTMASK *new;
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int i;
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if( !(new = im_create_imask( name, xs, ys )) )
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return( NULL );
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new->offset = m->offset;
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new->scale = m->scale;
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for( i = 0; i < size; i++ )
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new->coeff[i] = m->coeff[i];
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return( new );
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}
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DOUBLEMASK *
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im_dup_dmask( DOUBLEMASK *m, const char *name )
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{
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DOUBLEMASK *new;
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int xs = m->xsize;
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int ys = m->ysize;
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int size = xs * ys;
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int i;
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double *pnt1, *pnt2;
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if( !(new = im_create_dmask( name, xs, ys )) )
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return( NULL );
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new->offset = m->offset;
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new->scale = m->scale;
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pnt1 = m->coeff;
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pnt2 = new->coeff;
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for( i = 0; i < size; i++ )
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*pnt2++ = *pnt1++;
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return( new );
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}
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/* Open for write.
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*/
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static FILE *
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open_write( const char *name )
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{
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FILE *fp;
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if( !(fp = fopen( name, "w" )) ) {
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im_error( "write_mask", _( "unable to open \"%s\" for output" ),
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name );
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return( NULL );
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|
}
|
|
|
|
return( fp );
|
|
}
|
|
|
|
/* Write to file.
|
|
*/
|
|
static int
|
|
write_line( FILE *fp, const char *fmt, ... )
|
|
{
|
|
va_list ap;
|
|
|
|
va_start( ap, fmt );
|
|
if( !vfprintf( fp, fmt, ap ) ) {
|
|
im_error( "write_mask", "%s", _( "write error, disc full?" ) );
|
|
return( -1 );
|
|
}
|
|
va_end( ap );
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
static int
|
|
write_double( FILE *fp, double d )
|
|
{
|
|
char buf[G_ASCII_DTOSTR_BUF_SIZE];
|
|
|
|
fprintf( fp, "%s", g_ascii_dtostr( buf, sizeof( buf ), d ) );
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
/* Write the INTMASK m into name.
|
|
*/
|
|
int
|
|
im_write_imask_name( INTMASK *m, const char *name )
|
|
{
|
|
FILE *fp;
|
|
int x, y, i;
|
|
|
|
if( !(fp = open_write( name )) )
|
|
return( -1 );
|
|
|
|
if( write_line( fp, "%d %d %d %d\n",
|
|
m->xsize, m->ysize, m->scale, m->offset ) ) {
|
|
fclose( fp );
|
|
return( -1 );
|
|
}
|
|
|
|
for( i = 0, y = 0; y < m->ysize; y++ ) {
|
|
for( x = 0; x < m->xsize; x++, i++ )
|
|
if( write_line( fp, "%d ", m->coeff[i] ) ) {
|
|
fclose( fp );
|
|
return( -1 );
|
|
}
|
|
|
|
if( write_line( fp, "\n" ) ) {
|
|
fclose( fp );
|
|
return( -1 );
|
|
}
|
|
}
|
|
fclose( fp );
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
/* Write the INTMASK m into m->filename
|
|
*/
|
|
int
|
|
im_write_imask( INTMASK *m )
|
|
{
|
|
if( !m->filename ) {
|
|
im_error( "im_write_imask", "%s", _( "filename not set" ) );
|
|
return( -1 );
|
|
}
|
|
|
|
return( im_write_imask_name( m, m->filename ) );
|
|
}
|
|
|
|
/* Write the DOUBLEMASK m into name.
|
|
*/
|
|
int
|
|
im_write_dmask_name( DOUBLEMASK *m, const char *name )
|
|
{
|
|
FILE *fp;
|
|
int x, y, i;
|
|
|
|
if( !(fp = open_write( name )) )
|
|
return( -1 );
|
|
|
|
if( write_line( fp, "%d %d ", m->xsize, m->ysize ) ||
|
|
write_double( fp, m->scale ) ||
|
|
write_line( fp, " " ) ||
|
|
write_double( fp, m->offset ) ||
|
|
write_line( fp, "\n" ) ) {
|
|
fclose( fp );
|
|
return( -1 );
|
|
}
|
|
|
|
for( i = 0, y = 0; y < m->ysize; y++ ) {
|
|
for( x = 0; x < m->xsize; x++, i++ )
|
|
if( write_double( fp, m->coeff[i] ) ||
|
|
write_line( fp, " " ) ) {
|
|
fclose( fp );
|
|
return( -1 );
|
|
}
|
|
|
|
if( write_line( fp, "\n" ) ) {
|
|
fclose( fp );
|
|
return( -1 );
|
|
}
|
|
}
|
|
fclose( fp );
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
/* Write the DOUBLEMASK m into m->filename
|
|
*/
|
|
int
|
|
im_write_dmask( DOUBLEMASK *m )
|
|
{
|
|
if( !m->filename ) {
|
|
im_error( "im_write_dmask", "%s", _( "filename not set" ) );
|
|
return( -1 );
|
|
}
|
|
|
|
return( im_write_dmask_name( m, m->filename ) );
|
|
}
|
|
|
|
/* Copy an imask into a matrix. Only used internally by matrix package for
|
|
* invert.
|
|
*/
|
|
void
|
|
im_copy_imask_matrix( INTMASK *mask, int **matrix )
|
|
{
|
|
int x, y;
|
|
int *p = mask->coeff;
|
|
|
|
for( y = 0; y < mask->ysize; y++ )
|
|
for( x = 0; x < mask->xsize; x++ )
|
|
matrix[x][y] = *p++;
|
|
}
|
|
|
|
|
|
/* Copy a matrix into an imask.
|
|
*/
|
|
void
|
|
im_copy_matrix_imask( int **matrix, INTMASK *mask )
|
|
{
|
|
int x, y;
|
|
int *p = mask->coeff;
|
|
|
|
for( y = 0; y < mask->ysize; y++ )
|
|
for( x = 0; x < mask->xsize; x++ )
|
|
*p++ = matrix[x][y];
|
|
}
|
|
|
|
/* Copy a dmask into a matrix.
|
|
*/
|
|
void
|
|
im_copy_dmask_matrix( DOUBLEMASK *mask, double **matrix )
|
|
{
|
|
int x, y;
|
|
double *p = mask->coeff;
|
|
|
|
for( y = 0; y < mask->ysize; y++ )
|
|
for( x = 0; x < mask->xsize; x++ )
|
|
matrix[x][y] = *p++;
|
|
}
|
|
|
|
/* Copy a matrix to a dmask.
|
|
*/
|
|
void
|
|
im_copy_matrix_dmask( double **matrix, DOUBLEMASK *mask )
|
|
{
|
|
int x, y;
|
|
double *p = mask->coeff;
|
|
|
|
for( y = 0; y < mask->ysize; y++ )
|
|
for( x = 0; x < mask->xsize; x++ )
|
|
*p++ = matrix[x][y];
|
|
}
|
|
|
|
void
|
|
im_print_imask( INTMASK *m )
|
|
{
|
|
int i, j, k;
|
|
int *pm = m->coeff;
|
|
|
|
printf( "%s: %d %d %d %d\n",
|
|
m->filename, m->xsize, m->ysize, m->scale, m->offset );
|
|
|
|
for( k = 0, j = 0; j < m->ysize; j++ ) {
|
|
for( i = 0; i < m->xsize; i++, k++ )
|
|
printf( "%d\t", pm[k] );
|
|
|
|
printf( "\n" );
|
|
}
|
|
}
|
|
|
|
void
|
|
im_print_dmask( DOUBLEMASK *m )
|
|
{
|
|
int i, j, k;
|
|
double *pm = m->coeff;
|
|
|
|
printf( "%s: %d %d %f %f\n",
|
|
m->filename, m->xsize, m->ysize, m->scale, m->offset );
|
|
|
|
for( k = 0, j = 0; j < m->ysize; j++ ) {
|
|
for( i = 0; i < m->xsize; i++, k++ )
|
|
printf( "%f\t", pm[k] );
|
|
|
|
printf( "\n" );
|
|
}
|
|
}
|