163 lines
4.0 KiB
C
163 lines
4.0 KiB
C
/* fractal surface
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*
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* Author: N. Dessipris
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* Written on: 10/09/1991
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* Modified on:
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* 20/9/95 JC
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* - modernised, a little
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* 7/2/10
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* - cleanups
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* - gtkdoc
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* 4/1/14
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* - redo as a class
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*/
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/*
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This file is part of VIPS.
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VIPS is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA
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*/
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/*
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These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif /*HAVE_CONFIG_H*/
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#include <glib/gi18n-lib.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <vips/vips.h>
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#include "pcreate.h"
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typedef struct _VipsFractsurf {
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VipsCreate parent_instance;
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int width;
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int height;
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double fractal_dimension;
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} VipsFractsurf;
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typedef VipsCreateClass VipsFractsurfClass;
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G_DEFINE_TYPE( VipsFractsurf, vips_fractsurf, VIPS_TYPE_CREATE );
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static int
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vips_fractsurf_build( VipsObject *object )
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{
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VipsCreate *create = VIPS_CREATE( object );
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VipsFractsurf *fractsurf = (VipsFractsurf *) object;
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VipsImage **t = (VipsImage **) vips_object_local_array( object, 5 );
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if( VIPS_OBJECT_CLASS( vips_fractsurf_parent_class )->build( object ) )
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return( -1 );
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if( vips_gaussnoise( &t[0], fractsurf->width, fractsurf->height,
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"mean", 0.0,
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"sigma", 1.0,
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NULL ) ||
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vips_mask_fractal( &t[1], fractsurf->width, fractsurf->height,
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fractsurf->fractal_dimension, NULL ) ||
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vips_freqmult( t[0], t[1], &t[2], NULL ) ||
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vips_image_write( t[2], create->out ) )
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return( -1 );
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return( 0 );
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}
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static void
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vips_fractsurf_class_init( VipsFractsurfClass *class )
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS( class );
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VipsObjectClass *vobject_class = VIPS_OBJECT_CLASS( class );
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gobject_class->set_property = vips_object_set_property;
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gobject_class->get_property = vips_object_get_property;
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vobject_class->nickname = "fractsurf";
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vobject_class->description = _( "make a fractal surface" );
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vobject_class->build = vips_fractsurf_build;
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VIPS_ARG_INT( class, "width", 4,
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_( "Width" ),
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_( "Image width in pixels" ),
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VIPS_ARGUMENT_REQUIRED_INPUT,
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G_STRUCT_OFFSET( VipsFractsurf, width ),
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1, VIPS_MAX_COORD, 64 );
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VIPS_ARG_INT( class, "height", 5,
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_( "Height" ),
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_( "Image height in pixels" ),
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VIPS_ARGUMENT_REQUIRED_INPUT,
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G_STRUCT_OFFSET( VipsFractsurf, height ),
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1, VIPS_MAX_COORD, 64 );
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VIPS_ARG_DOUBLE( class, "fractal_dimension", 8,
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_( "Fractal dimension" ),
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_( "Fractal dimension" ),
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VIPS_ARGUMENT_REQUIRED_INPUT,
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G_STRUCT_OFFSET( VipsFractsurf, fractal_dimension ),
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2.0, 3.0, 2.5 );
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}
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static void
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vips_fractsurf_init( VipsFractsurf *fractsurf )
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{
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fractsurf->width = 64;
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fractsurf->height = 64;
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fractsurf->fractal_dimension = 2.5;
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}
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/**
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* vips_fractsurf:
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* @out: (out): output image
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* @width: output width
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* @height: output height
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* @fractal_dimension: fractal dimension
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* @...: %NULL-terminated list of optional named arguments
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*
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* Generate an image of size @width by @height and fractal dimension
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* @fractal_dimension. The dimension should be between 2 and 3.
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*
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* See also: vips_gaussnoise(), vips_mask_fractal().
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*
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* Returns: 0 on success, -1 on error
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*/
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int
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vips_fractsurf( VipsImage **out,
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int width, int height, double fractal_dimension, ... )
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{
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va_list ap;
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int result;
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va_start( ap, fractal_dimension );
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result = vips_call_split( "fractsurf", ap,
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out, width, height, fractal_dimension );
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va_end( ap );
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return( result );
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}
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