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im_divide() -> VipsDivide

This commit is contained in:
John Cupitt 2011-11-06 22:24:42 +00:00
parent 1fd1559bb5
commit e5b5bed428
7 changed files with 201 additions and 134 deletions
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2
ChangeLog
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@ -7,7 +7,7 @@
im_lintra(), im_lintra_vec(), im_black(), im_rot90, im_rot180(), im_rot270()
im_sintra(), im_costra(), im_tantra(), im_asintra(), im_acostra(),
im_atantra(), im_exptra(), im_exp10tra(), im_logtra(), im_log10tra(),
im_abs(), im_sign(), im_max(), im_maxpos(), im_deviate()
im_abs(), im_sign(), im_max(), im_maxpos(), im_deviate(), im_divide()
redone as classes
- added argument priorites to help control arg ordering
- generate has a 'stop' param to signal successful early termination

2
libvips/arithmetic/Makefile.am
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@ -6,7 +6,7 @@ libarithmetic_la_SOURCES = \
im_bandmean.c \
im_cross_phase.c \
deviate.c \
im_divide.c \
divide.c \
im_recomb.c \
im_linreg.c \
im_maxpos_avg.c \

6
libvips/arithmetic/arithmetic.c
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@ -502,8 +502,9 @@ void
vips_arithmetic_operation_init( void )
{
extern GType vips_add_get_type( void );
extern GType vips_invert_get_type( void );
extern GType vips_subtract_get_type( void );
extern GType vips_divide_get_type( void );
extern GType vips_invert_get_type( void );
extern GType vips_avg_get_type( void );
extern GType vips_min_get_type( void );
extern GType vips_max_get_type( void );
@ -514,8 +515,9 @@ vips_arithmetic_operation_init( void )
extern GType vips_sign_get_type( void );
vips_add_get_type();
vips_invert_get_type();
vips_subtract_get_type();
vips_divide_get_type();
vips_invert_get_type();
vips_avg_get_type();
vips_min_get_type();
vips_max_get_type();

305
libvips/arithmetic/im_divide.c → libvips/arithmetic/divide.c
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@ -1,4 +1,4 @@
/* im_divide.c
/* Divide two images
*
* Copyright: 1990, N. Dessipris.
*
@ -26,23 +26,25 @@
* 31/7/10
* - remove liboil support
* - avoid /0
* 6/11/11
* - rewrite as a class
*/
/*
This file is part of VIPS.
VIPS is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
Copyright (C) 1991-2005 The National Gallery
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
GNU General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
@ -54,6 +56,10 @@
*/
/*
#define DEBUG
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
@ -62,123 +68,14 @@
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <assert.h>
#include <vips/vips.h>
#include <vips/internal.h>
/* Complex divide.
*/
#ifdef USE_MODARG_DIV
/* This is going to be much slower */
#define CLOOP( TYPE ) { \
TYPE *X = (TYPE *) in[0]; \
TYPE *Y = (TYPE *) in[1]; \
TYPE *Z = (TYPE *) out; \
int i; \
\
for( i = 0; i < sz; i++ ) { \
double arg = atan2( X[1], X[0] ) - atan2( Y[1], Y[0] ); \
double mod = hypot( X[1], X[0] ) / hypot( Y[1], Y[0] ); \
\
Z[0] = mod * cos( arg ); \
Z[1] = mod * sin( arg ); \
\
X += 2; \
Y += 2; \
Z += 2; \
} \
}
#else /* USE_MODARG_DIV */
#define CLOOP( TYPE ) { \
TYPE *X = (TYPE *) in[0]; \
TYPE *Y = (TYPE *) in[1]; \
TYPE *Z = (TYPE *) out; \
int i; \
\
for( i = 0; i < sz; i++ ) { \
if( fabs( Y[0] ) > fabs( Y[1] ) ) { \
double a = Y[1] / Y[0]; \
double b = Y[0] + Y[1] * a; \
\
Z[0] = (X[0] + X[1] * a) / b; \
Z[1] = (X[1] - X[0] * a) / b; \
} \
else { \
double a = Y[0] / Y[1]; \
double b = Y[1] + Y[0] * a; \
\
Z[0] = (X[0] * a + X[1]) / b; \
Z[1] = (X[1] * a - X[0]) / b; \
} \
\
X += 2; \
Y += 2; \
Z += 2; \
} \
}
#endif /* USE_MODARG_DIV */
/* Real divide.
*/
#define RLOOP( IN, OUT ) { \
IN *p1 = (IN *) in[0]; \
IN *p2 = (IN *) in[1]; \
OUT *q = (OUT *) out; \
\
for( x = 0; x < sz; x++ ) \
if( p2[x] == 0.0 ) \
q[x] = 0; \
else \
q[x] = p1[x] / p2[x]; \
}
static void
divide_buffer( PEL **in, PEL *out, int width, IMAGE *im )
{
int x;
int sz = width * im->Bands;
/* Divide all input types.
*/
switch( im->BandFmt ) {
case IM_BANDFMT_CHAR: RLOOP( signed char, float ); break;
case IM_BANDFMT_UCHAR: RLOOP( unsigned char, float ); break;
case IM_BANDFMT_SHORT: RLOOP( signed short, float ); break;
case IM_BANDFMT_USHORT: RLOOP( unsigned short, float ); break;
case IM_BANDFMT_INT: RLOOP( signed int, float ); break;
case IM_BANDFMT_UINT: RLOOP( unsigned int, float ); break;
case IM_BANDFMT_FLOAT: RLOOP( float, float ); break;
case IM_BANDFMT_DOUBLE: RLOOP( double, double ); break;
case IM_BANDFMT_COMPLEX:CLOOP( float ); break;
case IM_BANDFMT_DPCOMPLEX:CLOOP( double ); break;
default:
assert( 0 );
}
}
/* Save a bit of typing.
*/
#define F IM_BANDFMT_FLOAT
#define X IM_BANDFMT_COMPLEX
#define D IM_BANDFMT_DOUBLE
#define DX IM_BANDFMT_DPCOMPLEX
/* Type promotion for division. Sign and value preserving. Make sure
* these match the case statement in divide_buffer() above.
*/
static int bandfmt_divide[10] = {
/* UC C US S UI I F X D DX */
F, F, F, F, F, F, F, X, D, DX
};
#include "arithmetic.h"
#include "binary.h"
/**
* im_divide:
* VipsDivide::
* @in1: input #IMAGE 1
* @in2: input #IMAGE 2
* @out: output #IMAGE
@ -256,15 +153,165 @@ static int bandfmt_divide[10] = {
* In other words, the output type is just large enough to hold the whole
* range of possible values.
*
* See also: im_multiply(), im_lintra().
*
* Returns: 0 on success, -1 on error
* See also: #VipsAdd, #VipsSubtract.
*/
int
im_divide( IMAGE *in1, IMAGE *in2, IMAGE *out )
{
return( im__arith_binary( "im_divide",
in1, in2, out,
bandfmt_divide,
(im_wrapmany_fn) divide_buffer, NULL ) );
typedef VipsBinary VipsDivide;
typedef VipsBinaryClass VipsDivideClass;
G_DEFINE_TYPE( VipsDivide, vips_divide, VIPS_TYPE_BINARY );
/* Complex divide.
*/
#ifdef USE_MODARG_DIV
/* This is going to be much slower */
#define CLOOP( TYPE ) { \
TYPE *left = (TYPE *) in[0]; \
TYPE *right = (TYPE *) in[1]; \
TYPE *q = (TYPE *) out; \
int i; \
\
for( i = 0; i < sz; i++ ) { \
double arg = atan2( left[1], left[0] ) - \
atan2( right[1], right[0] ); \
double mod = hypot( left[1], left[0] ) / \
hypot( right[1], right[0] ); \
\
q[0] = mod * cos( arg ); \
q[1] = mod * sin( arg ); \
\
left += 2; \
right += 2; \
q += 2; \
} \
}
#else /* USE_MODARG_DIV */
#define CLOOP( TYPE ) { \
TYPE *left = (TYPE *) in[0]; \
TYPE *right = (TYPE *) in[1]; \
TYPE *q = (TYPE *) out; \
int i; \
\
for( i = 0; i < sz; i++ ) { \
if( fabs( right[0] ) > fabs( right[1] ) ) { \
double a = right[1] / right[0]; \
double b = right[0] + right[1] * a; \
\
q[0] = (left[0] + left[1] * a) / b; \
q[1] = (left[1] - left[0] * a) / b; \
} \
else { \
double a = right[0] / right[1]; \
double b = right[1] + right[0] * a; \
\
q[0] = (left[0] * a + left[1]) / b; \
q[1] = (left[1] * a - left[0]) / b; \
} \
\
left += 2; \
right += 2; \
q += 2; \
} \
}
#endif /* USE_MODARG_DIV */
/* Real divide.
*/
#define RLOOP( IN, OUT ) { \
IN *left = (IN *) in[0]; \
IN *right = (IN *) in[1]; \
OUT *q = (OUT *) out; \
\
for( x = 0; x < sz; x++ ) \
if( right[x] == 0.0 ) \
q[x] = 0; \
else \
q[x] = left[x] / right[x]; \
}
static void
vips_divide_buffer( VipsArithmetic *arithmetic,
PEL *out, PEL **in, int width )
{
VipsImage *im = arithmetic->ready[0];
const int sz = width * vips_image_get_bands( im );
int x;
/* Keep types here in sync with bandfmt_divide[]
* below.
*/
switch( vips_image_get_format( im ) ) {
case VIPS_FORMAT_CHAR: RLOOP( signed char, signed short ); break;
case VIPS_FORMAT_UCHAR: RLOOP( unsigned char, signed short ); break;
case VIPS_FORMAT_SHORT: RLOOP( signed short, signed int ); break;
case VIPS_FORMAT_USHORT:RLOOP( unsigned short, signed int ); break;
case VIPS_FORMAT_INT: RLOOP( signed int, signed int ); break;
case VIPS_FORMAT_UINT: RLOOP( unsigned int, signed int ); break;
case VIPS_FORMAT_FLOAT: RLOOP( float, float ); break;
case VIPS_FORMAT_DOUBLE: RLOOP( double, double ); break;
case VIPS_FORMAT_COMPLEX: CLOOP( float ); break;
case VIPS_FORMAT_DPCOMPLEX: CLOOP( double ); break;
default:
g_assert( 0 );
}
}
/* Save a bit of typing.
*/
#define UC VIPS_FORMAT_UCHAR
#define C VIPS_FORMAT_CHAR
#define US VIPS_FORMAT_USHORT
#define S VIPS_FORMAT_SHORT
#define UI VIPS_FORMAT_UINT
#define I VIPS_FORMAT_INT
#define F VIPS_FORMAT_FLOAT
#define X VIPS_FORMAT_COMPLEX
#define D VIPS_FORMAT_DOUBLE
#define DX VIPS_FORMAT_DPCOMPLEX
/* Type promotion for division. Sign and value preserving. Make sure
* these match the case statement in divide_buffer() above.
*/
static int vips_bandfmt_divide[10] = {
/* UC C US S UI I F X D DX */
F, F, F, F, F, F, F, X, D, DX
};
static void
vips_divide_class_init( VipsDivideClass *class )
{
VipsObjectClass *object_class = (VipsObjectClass *) class;
VipsArithmeticClass *aclass = VIPS_ARITHMETIC_CLASS( class );
object_class->nickname = "divide";
object_class->description = _( "divide two images" );
vips_arithmetic_set_format_table( aclass, vips_bandfmt_divide );
aclass->process_line = vips_divide_buffer;
}
static void
vips_divide_init( VipsDivide *divide )
{
}
int
vips_divide( VipsImage *left, VipsImage *right, VipsImage **out, ... )
{
va_list ap;
int result;
va_start( ap, out );
result = vips_call_split( "divide", ap, left, right, out );
va_end( ap );
return( result );
}

16
libvips/deprecated/vips7compat.c
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@ -928,6 +928,22 @@ im_subtract( IMAGE *in1, IMAGE *in2, IMAGE *out )
return( 0 );
}
int
im_divide( IMAGE *in1, IMAGE *in2, IMAGE *out )
{
VipsImage *x;
if( vips_call( "divide", in1, in2, &x, NULL ) )
return( -1 );
if( im_copy( x, out ) ) {
g_object_unref( x );
return( -1 );
}
g_object_unref( x );
return( 0 );
}
int
im_avg( IMAGE *in, double *out )
{

3
libvips/include/vips/arithmetic.h
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@ -70,6 +70,8 @@ int vips_add( VipsImage *left, VipsImage *right, VipsImage **out, ... )
__attribute__((sentinel));
int vips_subtract( VipsImage *in1, VipsImage *in2, VipsImage **out, ... )
__attribute__((sentinel));
int vips_divide( VipsImage *left, VipsImage *right, VipsImage **out, ... )
__attribute__((sentinel));
int vips_avg( VipsImage *in, double *out, ... )
__attribute__((sentinel));
int vips_deviate( VipsImage *in, double *out, ... )
@ -107,7 +109,6 @@ int im_minpos_vec( VipsImage *im, int *xpos, int *ypos, double *minima, int n );
int im_bandmean( VipsImage *in, VipsImage *out );
int im_multiply( VipsImage *in1, VipsImage *in2, VipsImage *out );
int im_divide( VipsImage *in1, VipsImage *in2, VipsImage *out );
int im_remainder( VipsImage *in1, VipsImage *in2, VipsImage *out );
int im_remainder_vec( VipsImage *in, VipsImage *out, int n, double *c );
int im_remainderconst( VipsImage *in, VipsImage *out, double c );

1
libvips/include/vips/vips7compat.h
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@ -522,6 +522,7 @@ size_t im_ref_string_get_length( const GValue *value );
int im_add( VipsImage *in1, VipsImage *in2, VipsImage *out );
int im_subtract( VipsImage *in1, VipsImage *in2, VipsImage *out );
int im_divide( VipsImage *in1, VipsImage *in2, VipsImage *out );
int im_min( VipsImage *in, double *out );
int im_minpos( VipsImage *in, int *xpos, int *ypos, double *out );
int im_max( VipsImage *in, double *out );