323 lines
7.8 KiB
C
323 lines
7.8 KiB
C
/* v7math.c --- call various -lm functions (trig, log etc.) on imags
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*
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* vips7 compat stuff
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*
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* Copyright: 1990, N. Dessipris, based on im_powtra()
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* Author: Nicos Dessipris
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* Written on: 02/05/1990
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* Modified on:
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* 5/5/93 JC
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* - adapted from im_lintra to work with partial images
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* - incorrect implementation of complex logs removed
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* 1/7/93 JC
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* - adapted for partial v2
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* - ANSIfied
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* 24/2/95 JC
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* - im_logtra() adapted to make im_sintra()
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* - adapted for im_wrapone()
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* 26/1/96 JC
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* - im_asintra() added
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* 30/8/09
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* - gtkdoc
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* - tiny cleanups
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* - use im__math()
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* 19/9/09
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* - im_sintra() adapted to make math.c
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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 <math.h>
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#include <vips/vips.h>
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#include <vips/internal.h>
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/* What we do for each band element. Non-complex only.
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*/
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#define FUN_LOOP( IN, OUT, FUN ) { \
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IN *p = (IN *) in; \
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OUT *q = (OUT *) out; \
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\
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for( x = 0; x < ne; x++ ) \
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q[x] = FUN( (double) p[x] ); \
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}
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/* Operate on a buffer of PELs
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*/
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#define FUN_BUFFER( FUN ) \
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static void \
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FUN ## _buffer( PEL *in, PEL *out, int width, IMAGE *im ) \
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{ \
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const int ne = width * im->Bands; \
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\
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int x; \
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\
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/* Switch for all input types. \
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*/ \
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switch( im->BandFmt ) { \
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case IM_BANDFMT_UCHAR: FUN_LOOP( unsigned char, float, FUN ); break; \
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case IM_BANDFMT_CHAR: FUN_LOOP( signed char, float, FUN ); break; \
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case IM_BANDFMT_USHORT: FUN_LOOP( unsigned short, float, FUN ); break; \
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case IM_BANDFMT_SHORT: FUN_LOOP( signed short, float, FUN ); break; \
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case IM_BANDFMT_UINT: FUN_LOOP( unsigned int, float, FUN ); break; \
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case IM_BANDFMT_INT: FUN_LOOP( signed int, float, FUN ); break; \
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case IM_BANDFMT_FLOAT: FUN_LOOP( float, float, FUN ); break; \
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case IM_BANDFMT_DOUBLE: FUN_LOOP( double, double, FUN ); break; \
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\
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default: \
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g_assert( 0 ); \
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} \
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}
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/* Do a math (eg. sin(), acos(), log()) type-function. No complex, everything
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* goes to float except double.
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*/
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int
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im__math( const char *name, IMAGE *in, IMAGE *out, im_wrapone_fn gen )
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{
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if( im_piocheck( in, out ) ||
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im_check_uncoded( name, in ) ||
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im_check_noncomplex( name, in ) )
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return( -1 );
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if( im_cp_desc( out, in ) )
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return( -1 );
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if( vips_bandfmt_isint( in->BandFmt ) )
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out->BandFmt = IM_BANDFMT_FLOAT;
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if( im_wrapone( in, out, gen, in, NULL ) )
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return( -1 );
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return( 0 );
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}
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/* Sin in degrees.
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*/
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#define DSIN( X ) (sin( IM_RAD( X ) ))
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FUN_BUFFER( DSIN )
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/**
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* im_sintra
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* @in: input #IMAGE
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* @out: output #IMAGE
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*
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* For each pixel, call <function>sin(3)</function> (sine). Angles are
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* expressed in degrees. The output type is float, unless the input is
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* double, in which case the output is double. Non-complex images only.
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*
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* See also: im_asintra(), im_costra(), im_tantra().
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*
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* Returns: 0 on success, -1 on error
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*/
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int
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im_sintra( IMAGE *in, IMAGE *out )
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{
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return( im__math( "im_sintra", in, out, (im_wrapone_fn) DSIN_buffer ) );
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}
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/* Asin in degrees.
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*/
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#define ADSIN( X ) (IM_DEG( asin( X ) ))
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FUN_BUFFER( ADSIN )
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/**
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* im_asintra
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* @in: input #IMAGE
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* @out: output #IMAGE
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*
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* For each pixel, call <function>asin(3)</function> (arc, or inverse sine).
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* Angles are
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* expressed in degrees. The output type is float, unless the input is
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* double, in which case the output is double. Non-complex images only.
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*
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* See also: im_asintra(), im_costra(), im_tantra().
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*
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* Returns: 0 on success, -1 on error
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*/
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int
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im_asintra( IMAGE *in, IMAGE *out )
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{
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return( im__math( "im_asintra", in, out,
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(im_wrapone_fn) ADSIN_buffer ) );
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}
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/* Cos in degrees.
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*/
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#define DCOS( X ) (cos( IM_RAD( X ) ))
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FUN_BUFFER( DCOS )
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/**
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* im_costra
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* @in: input #IMAGE
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* @out: output #IMAGE
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*
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* For each pixel, call <function>cos(3)</function> (cosine). Angles are
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* expressed in degrees. The output type is float, unless the input is
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* double, in which case the output is double. Non-complex images only.
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*
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* See also: im_acostra(), im_sintra(), im_tantra().
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*
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* Returns: 0 on success, -1 on error
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*/
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int
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im_costra( IMAGE *in, IMAGE *out )
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{
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return( im__math( "im_costra", in, out, (im_wrapone_fn) DCOS_buffer ) );
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}
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/* Acos in degrees.
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*/
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#define ADCOS( X ) (IM_DEG( acos( X ) ))
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FUN_BUFFER( ADCOS )
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/**
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* im_acostra
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* @in: input #IMAGE
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* @out: output #IMAGE
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*
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* For each pixel, call <function>acos(3)</function> (arc or inverse cosine).
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* Angles are expressed in
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* degrees. The output type is float, unless the input is double, in which
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* case the output is double. Non-complex images only.
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*
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* See also: im_costra(), im_asintra(), im_atantra().
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*
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* Returns: 0 on success, -1 on error
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*/
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int
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im_acostra( IMAGE *in, IMAGE *out )
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{
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return( im__math( "im_acostra", in, out,
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(im_wrapone_fn) ADCOS_buffer ) );
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}
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/* Tan in degrees.
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*/
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#define DTAN( X ) (tan( IM_RAD( X ) ))
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FUN_BUFFER( DTAN )
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/**
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* im_tantra
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* @in: input #IMAGE
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* @out: output #IMAGE
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*
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* For each pixel, call <function>tan(3)</function> (tangent). Angles are
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* expressed in degrees. The output type is float, unless the input is
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* double, in which case the output is double. Non-complex images only.
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*
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* See also: im_atantra(), im_sintra(), im_tantra().
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*
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* Returns: 0 on success, -1 on error
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*/
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int
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im_tantra( IMAGE *in, IMAGE *out )
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{
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return( im__math( "im_tantra", in, out, (im_wrapone_fn) DTAN_buffer ) );
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}
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/* Atan in degrees.
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*/
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#define ADTAN( X ) (IM_DEG( atan( X ) ))
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FUN_BUFFER( ADTAN )
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/**
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* im_atantra
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* @in: input #IMAGE
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* @out: output #IMAGE
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*
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* For each pixel, call <function>atan(3)</function> (arc or inverse tangent).
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* Angles are expressed in
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* degrees. The output type is float, unless the input is double, in which
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* case the output is double. Non-complex images only.
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*
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* See also: im_tantra(), im_asintra(), im_atantra().
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*
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* Returns: 0 on success, -1 on error
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*/
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int
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im_atantra( IMAGE *in, IMAGE *out )
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{
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return( im__math( "im_atantra", in, out,
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(im_wrapone_fn) ADTAN_buffer ) );
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}
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FUN_BUFFER( log10 )
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/**
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* im_log10tra
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* @in: input #IMAGE
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* @out: output #IMAGE
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*
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* For each pixel, call <function>log10(3)</function> (base 10 logarithm).
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* The output type is float, unless the input is
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* double, in which case the output is double. Non-complex images only.
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*
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* See also: im_exp10tra(), im_logntra(), im_sintra().
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*
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* Returns: 0 on success, -1 on error
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*/
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int
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im_log10tra( IMAGE *in, IMAGE *out )
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{
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return( im__math( "im_log10tra", in, out,
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(im_wrapone_fn) log10_buffer ) );
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}
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FUN_BUFFER( log )
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/**
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* im_logtra
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* @in: input #IMAGE
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* @out: output #IMAGE
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*
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* For each pixel, call <function>log(3)</function> (natural logarithm).
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* The output type is float, unless the input is
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* double, in which case the output is double. Non-complex images only.
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*
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* See also: im_exp10tra(), im_logntra(), im_sintra().
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*
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* Returns: 0 on success, -1 on error
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*/
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int
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im_logtra( IMAGE *in, IMAGE *out )
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{
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return( im__math( "im_logtra", in, out, (im_wrapone_fn) log_buffer ) );
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}
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