/* This file is an image processing operation for GEGL
*
* GEGL 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 3 of the License, or (at your option) any later version.
*
* GEGL 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 GEGL; if not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2006 Øyvind Kolås <pippin@gimp.org>
*/
#include "config.h"
#include <glib/gi18n-lib.h>
#ifdef GEGL_CHANT_PROPERTIES
gegl_chant_double_ui (alpha, _("Alpha"), -G_MAXDOUBLE, G_MAXDOUBLE, 1.2, 0.0, 4.0, 1.0,
NULL)
gegl_chant_double_ui (scale, _("Scale"), -G_MAXDOUBLE, G_MAXDOUBLE, 1.8, 0.0, 20.0, 1.0,
NULL)
gegl_chant_double_ui (zoff, _("Z offset"), -G_MAXDOUBLE, G_MAXDOUBLE, -1, -1.0, 8.0, 1.0,
NULL)
gegl_chant_double_ui (seed, _("Seed"), -G_MAXDOUBLE, G_MAXDOUBLE, 0.0, 0.0, 100.0, 1.0,
NULL)
gegl_chant_int (n, _("Iteration"), 0, 20, 3,
NULL)
#else
#define GEGL_CHANT_TYPE_POINT_RENDER
#define GEGL_CHANT_C_FILE "noise.c"
#include "gegl-chant.h"
#include "perlin/perlin.c"
#include "perlin/perlin.h"
static void
prepare (GeglOperation *operation)
{
gegl_operation_set_format (operation, "output", babl_format ("Y float"));
}
static GeglRectangle
get_bounding_box (GeglOperation *operation)
{
GeglRectangle result = {-10000000, -10000000, 20000000, 20000000};
return result;
}
static gboolean
process (GeglOperation *operation,
void *out_buf,
glong n_pixels,
const GeglRectangle *roi,
gint level)
{
GeglChantO *o = GEGL_CHANT_PROPERTIES (operation);
gfloat *out_pixel = out_buf;
gint x = roi->x; /* initial x */
gint y = roi->y; /* and y coordinates */
while (n_pixels--)
{
gfloat val;
val = PerlinNoise3D ((double) (x)/50.0,
(double) (y)/50.0,
(double) o->zoff, o->alpha, o->scale,
o->n);
*out_pixel = val * 0.5 + 0.5;
out_pixel ++;
/* update x and y coordinates */
x++;
if (x>=roi->x + roi->width)
{
x=roi->x;
y++;
}
}
return TRUE;
}
static void
gegl_chant_class_init (GeglChantClass *klass)
{
GeglOperationClass *operation_class;
GeglOperationPointRenderClass *point_render_class;
operation_class = GEGL_OPERATION_CLASS (klass);
point_render_class = GEGL_OPERATION_POINT_RENDER_CLASS (klass);
point_render_class->process = process;
operation_class->get_bounding_box = get_bounding_box;
operation_class->prepare = prepare;
operation_class->no_cache = TRUE;
operation_class->get_cached_region = NULL;
gegl_operation_class_set_keys (operation_class,
"name" , "gegl:perlin-noise",
"categories" , "render",
"description", _("Perlin noise generator"),
NULL);
}
#endif