433 lines
12 KiB
C
433 lines
12 KiB
C
/* remainder.c
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*
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* 2/8/99 JC
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* - im_divide adapted to make im_remainder
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* 8/5/02 JC
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* - im_remainderconst added
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* - im_remainderconst_vec added
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* 27/9/04
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* - updated for 1 band $op n band image -> n band image case
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* 26/2/07
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* - oop, broken for _vec case :-(
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* 14/5/08
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* - better /0 test
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* 27/8/08
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* - revise upcasting system
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* - add gtkdoc comments
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* 23/6/10
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* - constant ops clip to target range
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* 12/11/11
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* - redone 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 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 "binary.h"
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#include "unaryconst.h"
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typedef VipsBinary VipsRemainder;
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typedef VipsBinaryClass VipsRemainderClass;
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G_DEFINE_TYPE( VipsRemainder, vips_remainder, VIPS_TYPE_BINARY );
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static int
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vips_remainder_build( VipsObject *object )
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{
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VipsObjectClass *class = VIPS_OBJECT_GET_CLASS( object );
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VipsBinary *binary = (VipsBinary *) object;
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if( binary->left &&
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vips_check_noncomplex( class->nickname, binary->left ) )
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return( -1 );
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if( binary->right &&
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vips_check_noncomplex( class->nickname, binary->right ) )
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return( -1 );
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if( VIPS_OBJECT_CLASS( vips_remainder_parent_class )->build( object ) )
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return( -1 );
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return( 0 );
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}
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/* Integer remainder-after-division.
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*/
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#define IREMAINDER( TYPE ) { \
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TYPE * restrict p1 = (TYPE *) in[0]; \
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TYPE * restrict p2 = (TYPE *) in[1]; \
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TYPE * restrict q = (TYPE *) out; \
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\
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for( x = 0; x < sz; x++ ) \
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q[x] = p2[x] ? p1[x] % p2[x] : -1; \
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}
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/* Float remainder-after-division.
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*/
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#define FREMAINDER( TYPE ) { \
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TYPE * restrict p1 = (TYPE *) in[0]; \
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TYPE * restrict p2 = (TYPE *) in[1]; \
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TYPE * restrict q = (TYPE *) out; \
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\
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for( x = 0; x < sz; x++ ) { \
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double a = p1[x]; \
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double b = p2[x]; \
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\
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q[x] = b ? a - b * VIPS_FLOOR (a / b) : -1; \
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} \
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}
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static void
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vips_remainder_buffer( VipsArithmetic *arithmetic,
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VipsPel *out, VipsPel **in, int width )
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{
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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( vips_image_get_format( im ) ) {
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case VIPS_FORMAT_CHAR: IREMAINDER( signed char ); break;
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case VIPS_FORMAT_UCHAR: IREMAINDER( unsigned char ); break;
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case VIPS_FORMAT_SHORT: IREMAINDER( signed short ); break;
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case VIPS_FORMAT_USHORT:IREMAINDER( unsigned short ); break;
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case VIPS_FORMAT_INT: IREMAINDER( signed int ); break;
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case VIPS_FORMAT_UINT: IREMAINDER( unsigned int ); break;
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case VIPS_FORMAT_FLOAT: FREMAINDER( float ); break;
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case VIPS_FORMAT_DOUBLE:FREMAINDER( double ); 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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/* Type promotion for remainder. Keep in sync with remainder_buffer() above.
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*/
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static int vips_remainder_format_table[10] = {
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/* UC C US S UI I F X D DX */
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UC, C, US, S, UI, I, F, X, D, DX
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};
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static void
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vips_remainder_class_init( VipsRemainderClass *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 = "remainder";
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object_class->description =
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_( "remainder after integer division of two images" );
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object_class->build = vips_remainder_build;
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aclass->process_line = vips_remainder_buffer;
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vips_arithmetic_set_format_table( aclass,
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vips_remainder_format_table );
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}
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static void
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vips_remainder_init( VipsRemainder *remainder )
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{
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}
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/**
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* vips_remainder:
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* @left: left-hand input #VipsImage
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* @right: right-hand 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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* This operation calculates @left % @right (remainder after integer division)
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* and writes the result to @out. The images may have any
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* non-complex format. For float formats, vips_remainder() calculates @in1 -
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* @in2 * floor (@in1 / @in2).
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*
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* If the images differ in size, the smaller image is enlarged to match the
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* larger by adding zero pixels along the bottom and right.
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*
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* If the number of bands differs, one of the images
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* must have one band. In this case, an n-band image is formed from the
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* one-band image by joining n copies of the one-band image together, and then
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* the two n-band images are operated upon.
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*
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* The two input images are cast up to the smallest common format (see table
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* Smallest common format in
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* <link linkend="libvips-arithmetic">arithmetic</link>), and that format is the
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* result type.
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*
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* See also: vips_remainder_const(), vips_divide(), vips_round().
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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_remainder( VipsImage *left, VipsImage *right, 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_call_split( "remainder", ap, left, right, out );
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va_end( ap );
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return( result );
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}
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typedef VipsUnaryConst VipsRemainderConst;
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typedef VipsUnaryConstClass VipsRemainderConstClass;
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G_DEFINE_TYPE( VipsRemainderConst,
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vips_remainder_const, VIPS_TYPE_UNARY_CONST );
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static int
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vips_remainder_const_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_remainder_const_parent_class )->
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build( object ) )
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return( -1 );
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return( 0 );
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}
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/* Integer remainder-after-divide, per-band constant.
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*/
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#define IREMAINDERCONST( TYPE ) { \
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TYPE * restrict p = (TYPE *) in[0]; \
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TYPE * restrict q = (TYPE *) out; \
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int * restrict c = uconst->c_int; \
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\
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for( i = 0, x = 0; x < width; x++ ) \
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for( b = 0; b < bands; b++, i++ ) \
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q[i] = p[i] % c[b]; \
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}
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/* Float remainder-after-divide, per-band constant.
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*/
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#define FREMAINDERCONST( TYPE ) { \
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TYPE * restrict p = (TYPE *) in[0]; \
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TYPE * restrict q = (TYPE *) out; \
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int * restrict c = uconst->c_int; \
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\
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for( i = 0, x = 0; x < width; x++ ) \
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for( b = 0; b < bands; b++, i++ ) { \
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double left = p[i]; \
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double right = c[b]; \
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\
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q[i] = right ? \
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left - right * floor( left / right ) : \
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-1; \
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} \
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}
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static void
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vips_remainder_const_buffer( VipsArithmetic *arithmetic,
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VipsPel *out, VipsPel **in, int width )
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{
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VipsUnaryConst *uconst = (VipsUnaryConst *) arithmetic;
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VipsImage *im = arithmetic->ready[0];
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int bands = im->Bands;
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int i, x, b;
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switch( vips_image_get_format( im ) ) {
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case VIPS_FORMAT_CHAR: IREMAINDERCONST( signed char ); break;
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case VIPS_FORMAT_UCHAR: IREMAINDERCONST( unsigned char ); break;
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case VIPS_FORMAT_SHORT: IREMAINDERCONST( signed short ); break;
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case VIPS_FORMAT_USHORT:IREMAINDERCONST( unsigned short ); break;
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case VIPS_FORMAT_INT: IREMAINDERCONST( signed int ); break;
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case VIPS_FORMAT_UINT: IREMAINDERCONST( unsigned int ); break;
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case VIPS_FORMAT_FLOAT: FREMAINDERCONST( float ); break;
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case VIPS_FORMAT_DOUBLE:FREMAINDERCONST( double ); 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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static void
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vips_remainder_const_class_init( VipsRemainderConstClass *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 = "remainder_const";
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object_class->description =
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_( "remainder after integer division of an image "
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"and a constant" );
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object_class->build = vips_remainder_const_build;
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aclass->process_line = vips_remainder_const_buffer;
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vips_arithmetic_set_format_table( aclass, vips_remainder_format_table );
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}
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static void
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vips_remainder_const_init( VipsRemainderConst *remainder_const )
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{
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}
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static int
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vips_remainder_constv( VipsImage *in, VipsImage **out,
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const double *c, int n, va_list ap )
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{
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VipsArea *area_c;
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double *array;
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int result;
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int i;
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area_c = vips_area_new_array( G_TYPE_DOUBLE, sizeof( double ), n );
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array = (double *) area_c->data;
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for( i = 0; i < n; i++ )
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array[i] = c[i];
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result = vips_call_split( "remainder_const", ap, in, out, area_c );
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vips_area_unref( area_c );
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return( result );
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}
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/**
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* vips_remainder_const: (method)
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* @in: input image
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* @out: (out): output image
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* @c: (array length=n): array of constants
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* @n: number of constants in @c
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* @...: %NULL-terminated list of optional named arguments
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*
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* This operation calculates @in % @c (remainder after division by an
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* array of constants)
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* and writes the result to @out.
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* The image may have any
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* non-complex format. For float formats, vips_remainder_const() calculates
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* @in - @c * floor (@in / @c).
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*
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* If the array of constants has just one element, that constant is used for
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* all image bands. If the array has more than one element and they have
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* the same number of elements as there are bands in the image, then
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* one array element is used for each band. If the arrays have more than one
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* element and the image only has a single band, the result is a many-band
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* image where each band corresponds to one array element.
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*
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* See also: vips_remainder(), vips_divide(), vips_round().
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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_remainder_const( VipsImage *in, VipsImage **out,
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const double *c, int n, ... )
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{
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va_list ap;
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int result;
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va_start( ap, n );
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result = vips_remainder_constv( in, out, c, n, 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_remainder_const1: (method)
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* @in: input image
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* @out: (out): output image
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* @c: constant
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* @...: %NULL-terminated list of optional named arguments
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*
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* This operation calculates @in % @c (remainder after division by a
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* constant)
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* and writes the result to @out.
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* The image may have any
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* non-complex format. For float formats, vips_remainder_const() calculates
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* @in - @c * floor (@in / @c).
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*
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* If the array of constants has just one element, that constant is used for
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* all image bands. If the array has more than one element and they have
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* the same number of elements as there are bands in the image, then
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* one array element is used for each band. If the arrays have more than one
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* element and the image only has a single band, the result is a many-band
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* image where each band corresponds to one array element.
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*
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* See also: vips_remainder(), vips_divide(), vips_round().
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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_remainder_const1( VipsImage *in, VipsImage **out, double c, ... )
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{
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va_list ap;
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int result;
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va_start( ap, c );
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result = vips_remainder_constv( in, out, &c, 1, ap );
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va_end( ap );
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return( result );
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}
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