332 lines
7.3 KiB
C
332 lines
7.3 KiB
C
/* complex.c ... various complex operations
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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: 12/02/1990
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* Modified on : 09/05/1990
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* 15/6/93 JC
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* - stupid stupid includes and externs fixed
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* - I have been editing for 1 1/2 hours and I'm still drowning in
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* rubbish extetrnshh
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* 13/12/94 JC
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* - modernised
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* 9/7/02 JC
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* - degree output, for consistency
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* - slightly better behaviour in edge cases
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* 27/1/10
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* - modernised
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* - gtk-doc
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* 19/11/11
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* - redo as a class
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*/
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/*
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Copyright (C) 1991-2005 The National Gallery
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU 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 General Public License for more details.
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You should have received a copy of the GNU 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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/*
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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 <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 "unary.h"
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typedef struct _VipsComplex {
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VipsUnary parent_instance;
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VipsOperationComplex cmplx;
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} VipsComplex;
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typedef VipsUnaryClass VipsComplexClass;
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G_DEFINE_TYPE( VipsComplex, vips_complex, VIPS_TYPE_UNARY );
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#define LOOP( IN, OUT, OP ) { \
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IN *p = (IN *) in[0]; \
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OUT *q = (OUT *) out; \
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\
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for( x = 0; x < sz; x++ ) { \
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OP( q, p[x], 0.0 ); \
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\
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q += 2; \
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} \
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}
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#define CLOOP( IN, OUT, OP ) { \
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IN *p = (IN *) in[0]; \
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OUT *q = (OUT *) out; \
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\
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for( x = 0; x < sz; x++ ) { \
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OP( q, p[0], p[1] ); \
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\
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p += 2; \
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q += 2; \
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} \
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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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case VIPS_FORMAT_COMPLEX: \
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CLOOP( float, float, OP ); break; \
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case VIPS_FORMAT_DPCOMPLEX: \
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CLOOP( double, double, OP ); 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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#define POLAR( Q, X, Y ) { \
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double re = (X); \
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double im = (Y); \
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double am, ph; \
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\
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am = sqrt( re * re + im * im ); \
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ph = im_col_ab2h( re, im ); \
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\
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Q[0] = am; \
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Q[1] = ph; \
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}
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#define RECT( Q, X, Y ) { \
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double am = (X); \
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double ph = (Y); \
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double re, im; \
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\
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re = am * cos( VIPS_RAD( ph ) ); \
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im = am * sin( VIPS_RAD( ph ) ); \
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\
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Q[0] = re; \
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Q[1] = im; \
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}
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#define CONJ( Q, X, Y ) { \
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double re = (X); \
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double im = (Y); \
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\
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im *= -1; \
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\
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Q[0] = re; \
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Q[1] = im; \
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}
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static void
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vips_complex_buffer( VipsArithmetic *arithmetic, PEL *out, PEL **in, int width )
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{
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VipsComplex *cmplx = (VipsComplex *) 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( cmplx->cmplx ) {
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case VIPS_OPERATION_COMPLEX_POLAR: SWITCH( POLAR ); break;
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case VIPS_OPERATION_COMPLEX_RECT: SWITCH( RECT ); break;
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case VIPS_OPERATION_COMPLEX_CONJ: SWITCH( CONJ ); break;
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default:
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g_assert( 0 );
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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_bandfmt_complex[10] = {
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/* UC C US S UI I F X D DX */
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X, X, X, X, X, X, X, X, DX, DX
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};
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static void
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vips_complex_class_init( VipsComplexClass *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 = "complex";
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object_class->description =
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_( "perform a complex operation on an image" );
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vips_arithmetic_set_format_table( aclass, vips_bandfmt_complex );
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aclass->process_line = vips_complex_buffer;
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VIPS_ARG_ENUM( class, "cmplx", 200,
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_( "Operation" ),
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_( "complex to perform" ),
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VIPS_ARGUMENT_REQUIRED_INPUT,
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G_STRUCT_OFFSET( VipsComplex, cmplx ),
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VIPS_TYPE_OPERATION_COMPLEX, VIPS_OPERATION_COMPLEX_POLAR );
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}
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static void
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vips_complex_init( VipsComplex *complex )
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{
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}
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static int
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vips_complexv( VipsImage *in, VipsImage **out,
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VipsOperationComplex cmplx, va_list ap )
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{
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return( vips_call_split( "complex", ap, in, out, cmplx ) );
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}
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/**
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* vips_complex:
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* @in: input #VipsImage
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* @out: output #VipsImage
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* @cmplx: complex operation to perform
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* @...: %NULL-terminated list of optional named arguments
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*
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* Perform various operations on complex images.
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*
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* Angles are expressed in degrees. The output type is complex unless the
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* input is double or dpcomplex, in which case the output is dpcomplex.
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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_complex( VipsImage *in, VipsImage **out, VipsOperationComplex cmplx, ... )
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{
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va_list ap;
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int result;
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va_start( ap, cmplx );
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result = vips_complexv( in, out, cmplx, 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_polar:
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* @in: input #VipsImage
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* @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_COMPLEX_POLAR on an image. See vips_complex().
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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_polar( 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_complexv( in, out, VIPS_OPERATION_COMPLEX_POLAR, 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_rect:
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* @in: input #VipsImage
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* @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_COMPLEX_RECT on an image. See vips_complex().
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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_rect( 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_complexv( in, out, VIPS_OPERATION_COMPLEX_POLAR, 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_conj:
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* @in: input #VipsImage
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* @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_COMPLEX_CONJ on an image. See vips_complex().
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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_conj( 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_complexv( in, out, VIPS_OPERATION_COMPLEX_CONJ, ap );
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va_end( ap );
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return( result );
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}
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