189 lines
4.2 KiB
C
189 lines
4.2 KiB
C
/* photographic negative ... just an example, really
|
|
*
|
|
* Copyright: 1990, N. Dessipris.
|
|
*
|
|
* Author: Nicos Dessipris
|
|
* Written on: 12/02/1990
|
|
* Modified on :
|
|
* 7/7/93 JC
|
|
* - memory leaks fixed
|
|
* - adapted for partial v2
|
|
* - ANSIfied
|
|
* 22/2/95 JC
|
|
* - tidied up again
|
|
* 2/9/09
|
|
* - gtk-doc comment
|
|
* 23/8/11
|
|
* - rewrite as a class
|
|
*/
|
|
|
|
/*
|
|
|
|
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 <math.h>
|
|
|
|
#include <vips/vips.h>
|
|
|
|
#include "unary.h"
|
|
|
|
/**
|
|
* VipsInvert:
|
|
* @in: input #VipsImage
|
|
* @out: output #VipsImage
|
|
*
|
|
* For unsigned formats, this operation calculates (max - @in), eg. (255 -
|
|
* @in) for uchar. For signed and float formats, this operation calculates (-1
|
|
* * @in).
|
|
*
|
|
* See also: im_lintra().
|
|
*
|
|
* Returns: 0 on success, -1 on error
|
|
*/
|
|
|
|
typedef VipsUnary VipsInvert;
|
|
typedef VipsUnaryClass VipsInvertClass;
|
|
|
|
G_DEFINE_TYPE( VipsInvert, vips_invert, VIPS_TYPE_UNARY );
|
|
|
|
#define LOOP( TYPE, L ) { \
|
|
TYPE *p = (TYPE *) in[0]; \
|
|
TYPE *q = (TYPE *) out; \
|
|
\
|
|
for( x = 0; x < sz; x++ ) \
|
|
q[x] = (L) - p[x]; \
|
|
}
|
|
|
|
#define LOOPN( TYPE ) { \
|
|
TYPE *p = (TYPE *) in[0]; \
|
|
TYPE *q = (TYPE *) out; \
|
|
\
|
|
for( x = 0; x < sz; x++ ) \
|
|
q[x] = -1 * p[x]; \
|
|
}
|
|
|
|
static void
|
|
vips_invert_buffer( VipsArithmetic *arithmetic, PEL *out, PEL **in, int width )
|
|
{
|
|
VipsImage *im = arithmetic->ready[0];
|
|
|
|
/* Complex just doubles the size.
|
|
*/
|
|
const int sz = width * vips_image_get_bands( im ) *
|
|
(vips_band_format_iscomplex( vips_image_get_format( im ) ) ?
|
|
2 : 1);
|
|
|
|
int x;
|
|
|
|
switch( vips_image_get_format( im ) ) {
|
|
case VIPS_FORMAT_UCHAR:
|
|
LOOP( unsigned char, UCHAR_MAX ); break;
|
|
case VIPS_FORMAT_CHAR:
|
|
LOOPN( signed char ); break;
|
|
case VIPS_FORMAT_USHORT:
|
|
LOOP( unsigned short, USHRT_MAX ); break;
|
|
case VIPS_FORMAT_SHORT:
|
|
LOOPN( signed short ); break;
|
|
case VIPS_FORMAT_UINT:
|
|
LOOP( unsigned int, UINT_MAX ); break;
|
|
case VIPS_FORMAT_INT:
|
|
LOOPN( signed int ); break;
|
|
|
|
case VIPS_FORMAT_FLOAT:
|
|
case VIPS_FORMAT_COMPLEX:
|
|
LOOPN( float ); break;
|
|
|
|
case VIPS_FORMAT_DOUBLE:
|
|
case VIPS_FORMAT_DPCOMPLEX:
|
|
LOOPN( 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
|
|
|
|
/* Format doesn't change with invert.
|
|
*/
|
|
static const VipsBandFormat vips_bandfmt_invert[10] = {
|
|
/* UC C US S UI I F X D DX */
|
|
UC, C, US, S, UI, I, F, X, D, DX
|
|
};
|
|
|
|
static void
|
|
vips_invert_class_init( VipsInvertClass *class )
|
|
{
|
|
VipsObjectClass *object_class = (VipsObjectClass *) class;
|
|
VipsArithmeticClass *aclass = VIPS_ARITHMETIC_CLASS( class );
|
|
|
|
object_class->nickname = "invert";
|
|
object_class->description = _( "invert an image" );
|
|
|
|
vips_arithmetic_set_format_table( aclass, vips_bandfmt_invert );
|
|
|
|
aclass->process_line = vips_invert_buffer;
|
|
}
|
|
|
|
static void
|
|
vips_invert_init( VipsInvert *invert )
|
|
{
|
|
}
|
|
|
|
int
|
|
vips_invert( VipsImage *in, VipsImage **out, ... )
|
|
{
|
|
va_list ap;
|
|
int result;
|
|
|
|
va_start( ap, out );
|
|
result = vips_call_split( "invert", ap, in, out );
|
|
va_end( ap );
|
|
|
|
return( result );
|
|
}
|