| /* im_fractsurf |
| * |
| * Copyright: 1991, N. Dessipris. |
| * |
| * Author: N. Dessipris |
| * Written on: 10/09/1991 |
| * Modified on: |
| * 20/9/95 JC |
| * - modernised, a little |
| * 7/2/10 |
| * - cleanups |
| * - gtkdoc |
| */ |
| |
| /* |
| |
| 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 <vips/intl.h> |
| |
| #include <stdio.h> |
| #include <stdarg.h> |
| #include <math.h> |
| |
| #include <vips/vips.h> |
| |
| #ifdef WITH_DMALLOC |
| #include <dmalloc.h> |
| #endif /*WITH_DMALLOC*/ |
| |
| /** |
| * im_fractsurf: |
| * @out: output image |
| * @size: size of image to generate |
| * @frd: fractal dimension |
| * |
| * Generate an image of size @size and fractal dimension @frd. The dimension |
| * should be between 2 and 3. |
| * |
| * See also: im_gaussnoise(), im_flt_image_freq(). |
| * |
| * Returns: 0 on success, -1 on error. |
| */ |
| int |
| im_fractsurf( IMAGE *out, int size, double frd ) |
| { |
| IMAGE *noise; |
| |
| if( frd <= 2.0 || frd >= 3.0 ) { |
| im_error( "im_fractsurf", "%s", |
| _( "dimension should be in (2,3)" ) ); |
| return( -1 ); |
| } |
| |
| if( !(noise = im_open_local( out, "im_fractsurf", "p" )) || |
| im_gaussnoise( noise, size, size, 0.0, 1.0 ) || |
| im_flt_image_freq( noise, out, VIPS_MASK_FRACTAL_FLT, frd ) ) |
| return( -1 ); |
| |
| return( 0 ); |
| } |