648 lines
15 KiB
C
648 lines
15 KiB
C
/* VipsMath --- call various -lm functions (trig, log etc.) on images
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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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* 4/11/11
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* - redone as a class
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* 11/8/15
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* - log/log10 zero-avoid
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*/
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/*
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Copyright (C) 1991-2005 The National Gallery
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 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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/*
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#define DEBUG
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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 <glib/gi18n-lib.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 "unary.h"
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typedef struct _VipsMath {
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VipsUnary parent_instance;
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VipsOperationMath math;
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} VipsMath;
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typedef VipsUnaryClass VipsMathClass;
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G_DEFINE_TYPE( VipsMath, vips_math, VIPS_TYPE_UNARY );
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static int
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vips_math_build( VipsObject *object )
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{
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VipsObjectClass *class = VIPS_OBJECT_GET_CLASS( object );
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VipsUnary *unary = (VipsUnary *) object;
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if( unary->in &&
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vips_check_noncomplex( class->nickname, unary->in ) )
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return( -1 );
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if( VIPS_OBJECT_CLASS( vips_math_parent_class )->build( object ) )
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return( -1 );
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return( 0 );
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}
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#define LOOP( IN, OUT, OP ) { \
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IN * restrict p = (IN *) in[0]; \
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OUT * restrict q = (OUT *) out; \
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\
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for( x = 0; x < sz; x++ ) \
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q[x] = OP( p[x] ); \
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}
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#define SWITCH( OP ) \
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switch( vips_image_get_format( im ) ) { \
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case VIPS_FORMAT_UCHAR: \
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LOOP( unsigned char, float, OP ); break; \
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case VIPS_FORMAT_CHAR: \
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LOOP( signed char, float, OP ); break; \
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case VIPS_FORMAT_USHORT: \
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LOOP( unsigned short, float, OP ); break; \
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case VIPS_FORMAT_SHORT: \
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LOOP( signed short, float, OP ); break; \
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case VIPS_FORMAT_UINT: \
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LOOP( unsigned int, float, OP ); break; \
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case VIPS_FORMAT_INT: \
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LOOP( signed int, float, OP ); break; \
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case VIPS_FORMAT_FLOAT: \
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LOOP( float, float, OP ); break; \
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case VIPS_FORMAT_DOUBLE: \
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LOOP( double, double, OP ); break;\
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\
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default: \
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g_assert_not_reached(); \
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}
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/* If there's asinh, assume we have the other two as well.
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*/
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#if HAVE_ASINH
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#define ASINH( X ) (asinh( X ))
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#define ACOSH( X ) (acosh( X ))
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#define ATANH( X ) (atanh( X ))
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#else
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#define ASINH( X ) (LOGZ( (X) + sqrt( (X) * (X) + 1.0 ) ))
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#define ACOSH( X ) (LOGZ( (X) + sqrt( (X) * (X) - 1.0 ) ))
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#define ATANH( X ) (0.5 * LOGZ( (1.0 + (X)) / (1.0 - (X)) ))
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#endif
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/* sin/cos/tan in degrees.
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*/
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#define DSIN( X ) (sin( VIPS_RAD( X ) ))
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#define DCOS( X ) (cos( VIPS_RAD( X ) ))
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#define DTAN( X ) (tan( VIPS_RAD( X ) ))
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#define ADSIN( X ) (VIPS_DEG( asin( X ) ))
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#define ADCOS( X ) (VIPS_DEG( acos( X ) ))
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#define ADTAN( X ) (VIPS_DEG( atan( X ) ))
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/* exp10() is a gnu extension, use pow().
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*/
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#define EXP10( X ) (pow( 10.0, (X) ))
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/* Zero-avoiding log, cf. zero-avoiding behaviour of /.
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*/
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#define LOGZ( X ) ((X) == 0.0 ? 0.0 : log( X ))
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#define LOGZ10( X ) ((X) == 0.0 ? 0.0 : log10( X ))
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static void
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vips_math_buffer( VipsArithmetic *arithmetic,
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VipsPel *out, VipsPel **in, int width )
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{
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VipsMath *math = (VipsMath *) arithmetic;
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VipsImage *im = arithmetic->ready[0];
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const int sz = width * vips_image_get_bands( im );
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int x;
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switch( math->math ) {
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case VIPS_OPERATION_MATH_SIN: SWITCH( DSIN ); break;
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case VIPS_OPERATION_MATH_COS: SWITCH( DCOS ); break;
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case VIPS_OPERATION_MATH_TAN: SWITCH( DTAN ); break;
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case VIPS_OPERATION_MATH_ASIN: SWITCH( ADSIN ); break;
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case VIPS_OPERATION_MATH_ACOS: SWITCH( ADCOS ); break;
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case VIPS_OPERATION_MATH_ATAN: SWITCH( ADTAN ); break;
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case VIPS_OPERATION_MATH_SINH: SWITCH( sinh ); break;
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case VIPS_OPERATION_MATH_COSH: SWITCH( cosh ); break;
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case VIPS_OPERATION_MATH_TANH: SWITCH( tanh ); break;
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case VIPS_OPERATION_MATH_ASINH: SWITCH( ASINH ); break;
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case VIPS_OPERATION_MATH_ACOSH: SWITCH( ACOSH ); break;
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case VIPS_OPERATION_MATH_ATANH: SWITCH( ATANH ); break;
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case VIPS_OPERATION_MATH_LOG: SWITCH( LOGZ ); break;
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case VIPS_OPERATION_MATH_LOG10: SWITCH( LOGZ10 ); break;
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case VIPS_OPERATION_MATH_EXP: SWITCH( exp ); break;
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case VIPS_OPERATION_MATH_EXP10: SWITCH( EXP10 ); break;
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default:
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g_assert_not_reached();
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}
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}
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/* Save a bit of typing.
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*/
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#define UC VIPS_FORMAT_UCHAR
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#define C VIPS_FORMAT_CHAR
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#define US VIPS_FORMAT_USHORT
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#define S VIPS_FORMAT_SHORT
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#define UI VIPS_FORMAT_UINT
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#define I VIPS_FORMAT_INT
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#define F VIPS_FORMAT_FLOAT
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#define X VIPS_FORMAT_COMPLEX
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#define D VIPS_FORMAT_DOUBLE
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#define DX VIPS_FORMAT_DPCOMPLEX
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static const VipsBandFormat vips_math_format_table[10] = {
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/* Band format: UC C US S UI I F X D DX */
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/* Promotion: */ F, F, F, F, F, F, F, X, D, DX
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};
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static void
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vips_math_class_init( VipsMathClass *class )
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS( class );
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VipsObjectClass *object_class = (VipsObjectClass *) class;
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VipsArithmeticClass *aclass = VIPS_ARITHMETIC_CLASS( class );
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gobject_class->set_property = vips_object_set_property;
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gobject_class->get_property = vips_object_get_property;
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object_class->nickname = "math";
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object_class->description = _( "apply a math operation to an image" );
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object_class->build = vips_math_build;
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aclass->process_line = vips_math_buffer;
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vips_arithmetic_set_format_table( aclass, vips_math_format_table );
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VIPS_ARG_ENUM( class, "math", 200,
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_( "Operation" ),
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_( "Math to perform" ),
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VIPS_ARGUMENT_REQUIRED_INPUT,
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G_STRUCT_OFFSET( VipsMath, math ),
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VIPS_TYPE_OPERATION_MATH, VIPS_OPERATION_MATH_SIN );
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}
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static void
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vips_math_init( VipsMath *math )
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{
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}
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static int
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vips_mathv( VipsImage *in, VipsImage **out, VipsOperationMath math, va_list ap )
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{
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return( vips_call_split( "math", ap, in, out, math ) );
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}
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/**
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* vips_math: (method)
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* @in: input #VipsImage
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* @out: (out): output #VipsImage
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* @math: math operation to perform
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* @...: %NULL-terminated list of optional named arguments
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*
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* Perform various functions in -lm, the maths library, on images.
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*
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* Angles are expressed in degrees. The output type is float unless the
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* input is double, in which case the output is double.
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*
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* Non-complex images only.
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*
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* See also: vips_math2().
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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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vips_math( VipsImage *in, VipsImage **out, VipsOperationMath math, ... )
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{
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va_list ap;
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int result;
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va_start( ap, math );
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result = vips_mathv( in, out, math, ap );
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va_end( ap );
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return( result );
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}
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/**
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* vips_sin: (method)
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* @in: input #VipsImage
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* @out: (out): output #VipsImage
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* @...: %NULL-terminated list of optional named arguments
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*
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* Perform #VIPS_OPERATION_MATH_SIN on an image. See vips_math().
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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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vips_sin( VipsImage *in, VipsImage **out, ... )
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{
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va_list ap;
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int result;
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va_start( ap, out );
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result = vips_mathv( in, out, VIPS_OPERATION_MATH_SIN, ap );
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va_end( ap );
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return( result );
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}
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/**
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* vips_cos: (method)
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* @in: input #VipsImage
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* @out: (out): output #VipsImage
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* @...: %NULL-terminated list of optional named arguments
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*
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* Perform #VIPS_OPERATION_MATH_COS on an image. See vips_math().
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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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vips_cos( VipsImage *in, VipsImage **out, ... )
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{
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va_list ap;
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int result;
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va_start( ap, out );
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result = vips_mathv( in, out, VIPS_OPERATION_MATH_COS, ap );
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va_end( ap );
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return( result );
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}
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/**
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* vips_tan: (method)
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* @in: input #VipsImage
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* @out: (out): output #VipsImage
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* @...: %NULL-terminated list of optional named arguments
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*
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* Perform #VIPS_OPERATION_MATH_TAN on an image. See vips_math().
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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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vips_tan( VipsImage *in, VipsImage **out, ... )
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{
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va_list ap;
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int result;
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va_start( ap, out );
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result = vips_mathv( in, out, VIPS_OPERATION_MATH_TAN, ap );
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va_end( ap );
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return( result );
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}
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/**
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* vips_asin: (method)
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* @in: input #VipsImage
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* @out: (out): output #VipsImage
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* @...: %NULL-terminated list of optional named arguments
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*
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* Perform #VIPS_OPERATION_MATH_ASIN on an image. See vips_math().
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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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vips_asin( VipsImage *in, VipsImage **out, ... )
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{
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va_list ap;
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int result;
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va_start( ap, out );
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result = vips_mathv( in, out, VIPS_OPERATION_MATH_ASIN, ap );
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va_end( ap );
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return( result );
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}
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/**
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* vips_acos: (method)
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* @in: input #VipsImage
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* @out: (out): output #VipsImage
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* @...: %NULL-terminated list of optional named arguments
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*
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* Perform #VIPS_OPERATION_MATH_ACOS on an image. See vips_math().
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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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vips_acos( VipsImage *in, VipsImage **out, ... )
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{
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va_list ap;
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int result;
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va_start( ap, out );
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result = vips_mathv( in, out, VIPS_OPERATION_MATH_ACOS, ap );
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va_end( ap );
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return( result );
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}
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/**
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* vips_atan: (method)
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* @in: input #VipsImage
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* @out: (out): output #VipsImage
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* @...: %NULL-terminated list of optional named arguments
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*
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* Perform #VIPS_OPERATION_MATH_ATAN on an image. See vips_math().
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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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vips_atan( VipsImage *in, VipsImage **out, ... )
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{
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va_list ap;
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int result;
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va_start( ap, out );
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result = vips_mathv( in, out, VIPS_OPERATION_MATH_ATAN, ap );
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va_end( ap );
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return( result );
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}
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/**
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* vips_sinh: (method)
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* @in: input #VipsImage
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* @out: (out): output #VipsImage
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* @...: %NULL-terminated list of optional named arguments
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*
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* Perform #VIPS_OPERATION_MATH_SINH on an image. See vips_math().
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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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vips_sinh( VipsImage *in, VipsImage **out, ... )
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{
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va_list ap;
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int result;
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va_start( ap, out );
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result = vips_mathv( in, out, VIPS_OPERATION_MATH_SINH, ap );
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va_end( ap );
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return( result );
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}
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/**
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* vips_cosh: (method)
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* @in: input #VipsImage
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* @out: (out): output #VipsImage
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* @...: %NULL-terminated list of optional named arguments
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*
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* Perform #VIPS_OPERATION_MATH_COSH on an image. See vips_math().
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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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vips_cosh( VipsImage *in, VipsImage **out, ... )
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{
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va_list ap;
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int result;
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va_start( ap, out );
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result = vips_mathv( in, out, VIPS_OPERATION_MATH_COSH, ap );
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va_end( ap );
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return( result );
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}
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/**
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* vips_tanh: (method)
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* @in: input #VipsImage
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* @out: (out): output #VipsImage
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* @...: %NULL-terminated list of optional named arguments
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*
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* Perform #VIPS_OPERATION_MATH_TANH on an image. See vips_math().
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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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vips_tanh( VipsImage *in, VipsImage **out, ... )
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{
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va_list ap;
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int result;
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va_start( ap, out );
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result = vips_mathv( in, out, VIPS_OPERATION_MATH_TANH, ap );
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va_end( ap );
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return( result );
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}
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/**
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* vips_asinh: (method)
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* @in: input #VipsImage
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* @out: (out): output #VipsImage
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* @...: %NULL-terminated list of optional named arguments
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*
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* Perform #VIPS_OPERATION_MATH_ASINH on an image. See vips_math().
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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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vips_asinh( VipsImage *in, VipsImage **out, ... )
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{
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va_list ap;
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int result;
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va_start( ap, out );
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result = vips_mathv( in, out, VIPS_OPERATION_MATH_ASINH, ap );
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va_end( ap );
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return( result );
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}
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/**
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* vips_acosh: (method)
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* @in: input #VipsImage
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* @out: (out): output #VipsImage
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* @...: %NULL-terminated list of optional named arguments
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*
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* Perform #VIPS_OPERATION_MATH_ACOSH on an image. See vips_math().
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*
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* Returns: 0 on success, -1 on error
|
|
*/
|
|
int
|
|
vips_acosh( VipsImage *in, VipsImage **out, ... )
|
|
{
|
|
va_list ap;
|
|
int result;
|
|
|
|
va_start( ap, out );
|
|
result = vips_mathv( in, out, VIPS_OPERATION_MATH_ACOSH, ap );
|
|
va_end( ap );
|
|
|
|
return( result );
|
|
}
|
|
|
|
/**
|
|
* vips_atanh: (method)
|
|
* @in: input #VipsImage
|
|
* @out: (out): output #VipsImage
|
|
* @...: %NULL-terminated list of optional named arguments
|
|
*
|
|
* Perform #VIPS_OPERATION_MATH_ATANH on an image. See vips_math().
|
|
*
|
|
* Returns: 0 on success, -1 on error
|
|
*/
|
|
int
|
|
vips_atanh( VipsImage *in, VipsImage **out, ... )
|
|
{
|
|
va_list ap;
|
|
int result;
|
|
|
|
va_start( ap, out );
|
|
result = vips_mathv( in, out, VIPS_OPERATION_MATH_ATANH, ap );
|
|
va_end( ap );
|
|
|
|
return( result );
|
|
}
|
|
|
|
/**
|
|
* vips_log: (method)
|
|
* @in: input #VipsImage
|
|
* @out: (out): output #VipsImage
|
|
* @...: %NULL-terminated list of optional named arguments
|
|
*
|
|
* Perform #VIPS_OPERATION_MATH_LOG on an image. See vips_math().
|
|
*
|
|
* Returns: 0 on success, -1 on error
|
|
*/
|
|
int
|
|
vips_log( VipsImage *in, VipsImage **out, ... )
|
|
{
|
|
va_list ap;
|
|
int result;
|
|
|
|
va_start( ap, out );
|
|
result = vips_mathv( in, out, VIPS_OPERATION_MATH_LOG, ap );
|
|
va_end( ap );
|
|
|
|
return( result );
|
|
}
|
|
|
|
/**
|
|
* vips_log10: (method)
|
|
* @in: input #VipsImage
|
|
* @out: (out): output #VipsImage
|
|
* @...: %NULL-terminated list of optional named arguments
|
|
*
|
|
* Perform #VIPS_OPERATION_MATH_LOG10 on an image. See vips_math().
|
|
*
|
|
* Returns: 0 on success, -1 on error
|
|
*/
|
|
int
|
|
vips_log10( VipsImage *in, VipsImage **out, ... )
|
|
{
|
|
va_list ap;
|
|
int result;
|
|
|
|
va_start( ap, out );
|
|
result = vips_mathv( in, out, VIPS_OPERATION_MATH_LOG10, ap );
|
|
va_end( ap );
|
|
|
|
return( result );
|
|
}
|
|
|
|
/**
|
|
* vips_exp: (method)
|
|
* @in: input #VipsImage
|
|
* @out: (out): output #VipsImage
|
|
* @...: %NULL-terminated list of optional named arguments
|
|
*
|
|
* Perform #VIPS_OPERATION_MATH_EXP on an image. See vips_math().
|
|
*
|
|
* Returns: 0 on success, -1 on error
|
|
*/
|
|
int
|
|
vips_exp( VipsImage *in, VipsImage **out, ... )
|
|
{
|
|
va_list ap;
|
|
int result;
|
|
|
|
va_start( ap, out );
|
|
result = vips_mathv( in, out, VIPS_OPERATION_MATH_EXP, ap );
|
|
va_end( ap );
|
|
|
|
return( result );
|
|
}
|
|
|
|
/**
|
|
* vips_exp10: (method)
|
|
* @in: input #VipsImage
|
|
* @out: (out): output #VipsImage
|
|
* @...: %NULL-terminated list of optional named arguments
|
|
*
|
|
* Perform #VIPS_OPERATION_MATH_EXP10 on an image. See vips_math().
|
|
*
|
|
* Returns: 0 on success, -1 on error
|
|
*/
|
|
int
|
|
vips_exp10( VipsImage *in, VipsImage **out, ... )
|
|
{
|
|
va_list ap;
|
|
int result;
|
|
|
|
va_start( ap, out );
|
|
result = vips_mathv( in, out, VIPS_OPERATION_MATH_EXP10, ap );
|
|
va_end( ap );
|
|
|
|
return( result );
|
|
}
|