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/* fractal surface
*
* Author: N. Dessipris
* Written on: 10/09/1991
* Modified on:
* 20/9/95 JC
* - modernised, a little
* 7/2/10
* - cleanups
* - gtkdoc
* 4/1/14
* - redo 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
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
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <glib/gi18n-lib.h>
#include <stdio.h>
#include <stdlib.h>
#include <vips/vips.h>
#include "pcreate.h"
typedef struct _VipsFractsurf {
VipsCreate parent_instance;
int width;
int height;
double fractal_dimension;
} VipsFractsurf;
typedef VipsCreateClass VipsFractsurfClass;
G_DEFINE_TYPE( VipsFractsurf, vips_fractsurf, VIPS_TYPE_CREATE );
static int
vips_fractsurf_build( VipsObject *object )
{
VipsCreate *create = VIPS_CREATE( object );
VipsFractsurf *fractsurf = (VipsFractsurf *) object;
VipsImage **t = (VipsImage **) vips_object_local_array( object, 5 );
if( VIPS_OBJECT_CLASS( vips_fractsurf_parent_class )->build( object ) )
return( -1 );
if( vips_gaussnoise( &t[0], fractsurf->width, fractsurf->height,
"mean", 0.0,
"sigma", 1.0,
NULL ) ||
vips_mask_fractal( &t[1], fractsurf->width, fractsurf->height,
fractsurf->fractal_dimension, NULL ) ||
vips_freqmult( t[0], t[1], &t[2], NULL ) ||
vips_image_write( t[2], create->out ) )
return( -1 );
return( 0 );
}
static void
vips_fractsurf_class_init( VipsFractsurfClass *class )
{
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
VipsObjectClass *vobject_class = VIPS_OBJECT_CLASS( class );
gobject_class->set_property = vips_object_set_property;
gobject_class->get_property = vips_object_get_property;
vobject_class->nickname = "fractsurf";
vobject_class->description = _( "make a fractal surface" );
vobject_class->build = vips_fractsurf_build;
VIPS_ARG_INT( class, "width", 4,
_( "Width" ),
_( "Image width in pixels" ),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET( VipsFractsurf, width ),
1, VIPS_MAX_COORD, 64 );
VIPS_ARG_INT( class, "height", 5,
_( "Height" ),
_( "Image height in pixels" ),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET( VipsFractsurf, height ),
1, VIPS_MAX_COORD, 64 );
VIPS_ARG_DOUBLE( class, "fractal_dimension", 8,
_( "Fractal dimension" ),
_( "Fractal dimension" ),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET( VipsFractsurf, fractal_dimension ),
2.0, 3.0, 2.5 );
}
static void
vips_fractsurf_init( VipsFractsurf *fractsurf )
{
fractsurf->width = 64;
fractsurf->height = 64;
fractsurf->fractal_dimension = 2.5;
}
/**
* vips_fractsurf:
* @out: (out): output image
* @width: output width
* @height: output height
* @fractal_dimension: fractal dimension
* @...: %NULL-terminated list of optional named arguments
*
* Generate an image of size @width by @height and fractal dimension
* @fractal_dimension. The dimension should be between 2 and 3.
*
* See also: vips_gaussnoise(), vips_mask_fractal().
*
* Returns: 0 on success, -1 on error
*/
int
vips_fractsurf( VipsImage **out,
int width, int height, double fractal_dimension, ... )
{
va_list ap;
int result;
va_start( ap, fractal_dimension );
result = vips_call_split( "fractsurf", ap,
out, width, height, fractal_dimension );
va_end( ap );
return( result );
}
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