0337c09700
Use GLib's i18n support instead of copying and pasting that logic into its own header. This deprecates the vips/intl.h header in favour of glib/gi18n.h.
149 lines
3.3 KiB
C
149 lines
3.3 KiB
C
/* base class for frequency filter create operations
|
|
*
|
|
* 02/01/14
|
|
* - from sines.c
|
|
*/
|
|
|
|
/*
|
|
|
|
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
|
|
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.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
02110-1301 USA
|
|
|
|
*/
|
|
|
|
/*
|
|
|
|
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
|
|
|
|
*/
|
|
|
|
/*
|
|
#define VIPS_DEBUG
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif /*HAVE_CONFIG_H*/
|
|
#include <glib/gi18n-lib.h>
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <math.h>
|
|
|
|
#include <vips/vips.h>
|
|
|
|
#include "pcreate.h"
|
|
#include "point.h"
|
|
#include "pmask.h"
|
|
|
|
G_DEFINE_ABSTRACT_TYPE( VipsMask, vips_mask, VIPS_TYPE_POINT );
|
|
|
|
static float
|
|
vips_mask_point( VipsPoint *point, int x, int y )
|
|
{
|
|
VipsMask *mask = VIPS_MASK( point );
|
|
VipsMaskClass *class = VIPS_MASK_GET_CLASS( point );
|
|
|
|
/* VIPS_MAX to prevent /0.
|
|
*/
|
|
int half_width = VIPS_MAX( point->width / 2, 1 );
|
|
int half_height = VIPS_MAX( point->height / 2, 1 );
|
|
|
|
double result;
|
|
|
|
/* Move centre for an optical transform mask.
|
|
*/
|
|
if( !mask->optical ) {
|
|
x = (x + half_width) % point->width;
|
|
y = (y + half_height) % point->height;
|
|
}
|
|
|
|
x = x - half_width;
|
|
y = y - half_height;
|
|
|
|
if( !mask->nodc &&
|
|
x == 0 &&
|
|
y == 0 )
|
|
/* DC component is always 1.
|
|
*/
|
|
result = 1.0;
|
|
else {
|
|
double dx, dy;
|
|
|
|
dx = (double) x / half_width;
|
|
dy = (double) y / half_height;
|
|
|
|
result = class->point( mask, dx, dy );
|
|
|
|
/* Invert filter sense for a highpass filter, or to swap
|
|
* band-pass for band-reject.
|
|
*/
|
|
if( mask->reject )
|
|
result = 1.0 - result;
|
|
}
|
|
|
|
return( result );
|
|
}
|
|
|
|
static void
|
|
vips_mask_class_init( VipsMaskClass *class )
|
|
{
|
|
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
|
|
VipsObjectClass *vobject_class = VIPS_OBJECT_CLASS( class );
|
|
VipsPointClass *point_class = VIPS_POINT_CLASS( class );
|
|
|
|
gobject_class->set_property = vips_object_set_property;
|
|
gobject_class->get_property = vips_object_get_property;
|
|
|
|
vobject_class->nickname = "mask";
|
|
vobject_class->description = _( "base class for frequency filters" );
|
|
|
|
point_class->point = vips_mask_point;
|
|
point_class->min = 0.0;
|
|
point_class->max = 1.0;
|
|
point_class->interpretation = VIPS_INTERPRETATION_FOURIER;
|
|
|
|
VIPS_ARG_BOOL( class, "optical", 5,
|
|
_( "Optical" ),
|
|
_( "Rotate quadrants to optical space" ),
|
|
VIPS_ARGUMENT_OPTIONAL_INPUT,
|
|
G_STRUCT_OFFSET( VipsMask, optical ),
|
|
FALSE );
|
|
|
|
VIPS_ARG_BOOL( class, "reject", 5,
|
|
_( "Reject" ),
|
|
_( "Invert the sense of the filter" ),
|
|
VIPS_ARGUMENT_OPTIONAL_INPUT,
|
|
G_STRUCT_OFFSET( VipsMask, reject ),
|
|
FALSE );
|
|
|
|
VIPS_ARG_BOOL( class, "nodc", 5,
|
|
_( "Nodc" ),
|
|
_( "Remove DC component" ),
|
|
VIPS_ARGUMENT_OPTIONAL_INPUT,
|
|
G_STRUCT_OFFSET( VipsMask, nodc ),
|
|
FALSE );
|
|
|
|
}
|
|
|
|
static void
|
|
vips_mask_init( VipsMask *mask )
|
|
{
|
|
}
|
|
|