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/* an image plus a constant
*
* 11/11/11
* - from arith_binary_const
*/
/*
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 General Public License for more details.
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
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
/*
#define DEBUG
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <vips/intl.h>
#include <stdio.h>
#include <stdlib.h>
#include <vips/vips.h>
#include "unaryconst.h"
G_DEFINE_ABSTRACT_TYPE( VipsUnaryConst, vips_unary_const, VIPS_TYPE_UNARY );
/* Cast a vector of double to a vector of TYPE, clipping to a range.
*/
#define CAST_CLIP( TYPE, N, X ) { \
TYPE *tq = (TYPE *) q; \
\
for( i = 0; i < m; i++ ) { \
double v = p[VIPS_MIN( n - 1, i )]; \
\
tq[i] = (TYPE) VIPS_CLIP( N, v, X ); \
} \
}
/* Cast a vector of double to a vector of TYPE.
*/
#define CAST( TYPE ) { \
TYPE *tq = (TYPE *) q; \
\
for( i = 0; i < m; i++ ) \
tq[i] = (TYPE) p[VIPS_MIN( n - 1, i )]; \
}
/* Cast a vector of double to a complex vector of TYPE.
*/
#define CASTC( TYPE ) { \
TYPE *tq = (TYPE *) q; \
\
for( i = 0; i < m; i++ ) { \
tq[0] = (TYPE) p[VIPS_MIN( n - 1, i )]; \
tq[1] = 0; \
\
tq += 2; \
} \
}
/* Cast a n-band vector of double to a m-band vector in another format.
*/
static VipsPel *
make_pixel( VipsObject *obj, int m, VipsBandFmt fmt, int n, double *p )
{
VipsPel *q;
int i;
if( !(q = VIPS_ARRAY( obj,
m * vips__image_sizeof_bandformat[fmt], VipsPel )) )
return( NULL );
switch( fmt ) {
case VIPS_FORMAT_CHAR:
CAST_CLIP( signed char, SCHAR_MIN, SCHAR_MAX );
break;
case VIPS_FORMAT_UCHAR:
CAST_CLIP( unsigned char, 0, UCHAR_MAX );
break;
case VIPS_FORMAT_SHORT:
CAST_CLIP( signed short, SCHAR_MIN, SCHAR_MAX );
break;
case VIPS_FORMAT_USHORT:
CAST_CLIP( unsigned short, 0, USHRT_MAX );
break;
case VIPS_FORMAT_INT:
CAST_CLIP( signed int, INT_MIN, INT_MAX );
break;
case VIPS_FORMAT_UINT:
CAST_CLIP( unsigned int, 0, UINT_MAX );
break;
case VIPS_FORMAT_FLOAT:
CAST( float );
break;
case VIPS_FORMAT_DOUBLE:
CAST( double );
break;
case VIPS_FORMAT_COMPLEX:
CASTC( float );
break;
case VIPS_FORMAT_DPCOMPLEX:
CASTC( double );
break;
default:
g_assert( 0 );
}
return( q );
}
static int
vips_unary_const_build( VipsObject *object )
{
VipsArithmetic *arithmetic = VIPS_ARITHMETIC( object );
VipsUnary *unary = (VipsUnary *) object;
VipsUnaryConst *uconst = (VipsUnaryConst *) object;
/* If we have a three-element vector we need to bandup the image to
* match.
*/
uconst->n = 1;
if( uconst->c )
uconst->n = VIPS_MAX( uconst->n, uconst->c->n );
if( unary->in )
uconst->n = VIPS_MAX( uconst->n, unary->in->Bands );
arithmetic->base_bands = uconst->n;
if( unary->in && uconst->c ) {
if( vips_check_vector( "VipsRelationalConst",
uconst->c->n, unary->in ) )
return( -1 );
}
/* Some operations need the vector in the input type (eg.
* im_equal_vec() where the output type is always uchar and is useless
* for comparisons), some need it in the output type (eg.
* im_andimage_vec() where we want to get the double to an int so we
* can do bitwise-and without having to cast for each pixel), some
* need a fixed type (eg. im_powtra_vec(), where we want to keep it as
* double).
*
* Therefore pass in the desired vector type as a param.
*/
if( uconst->c )
uconst->c_ready = make_pixel( (VipsObject *) uconst,
uconst->n, uconst->const_format,
uconst->c->n, (double *) uconst->c->data );
if( VIPS_OBJECT_CLASS( vips_unary_const_parent_class )->
build( object ) )
return( -1 );
return( 0 );
}
static void
vips_unary_const_class_init( VipsUnaryConstClass *class )
{
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
VipsObjectClass *object_class = (VipsObjectClass *) class;
gobject_class->set_property = vips_object_set_property;
gobject_class->get_property = vips_object_get_property;
object_class->nickname = "unary_const";
object_class->description = _( "unary operations with a constant" );
object_class->build = vips_unary_const_build;
VIPS_ARG_BOXED( class, "c", 200,
_( "c" ),
_( "Array of constants" ),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET( VipsUnaryConst, c ),
VIPS_TYPE_ARRAY_DOUBLE );
}
static void
vips_unary_const_init( VipsUnaryConst *uconst )
{
}
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