/* !!!! AUTOGENERATED FILE generated by math.rb !!!!!
*
* 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>
*
* !!!! AUTOGENERATED FILE !!!!!
*/
#include "config.h"
#include <glib/gi18n-lib.h>
#ifdef GEGL_CHANT_PROPERTIES
gegl_chant_double (value, _("Value"), -G_MAXDOUBLE, G_MAXDOUBLE, 0.0, _("global value used if aux doesn't contain data"))
#else
#define GEGL_CHANT_TYPE_POINT_COMPOSER
#define GEGL_CHANT_C_FILE "subtract.c"
#include "gegl-chant.h"
#include <math.h>
#ifdef _MSC_VER
#define powf(a,b) ((gfloat)pow(a,b))
#endif
static void prepare (GeglOperation *operation)
{
const Babl *format = babl_format ("RGBA float");
gegl_operation_set_format (operation, "input", format);
gegl_operation_set_format (operation, "aux", babl_format ("RGB float"));
gegl_operation_set_format (operation, "output", format);
}
static gboolean
process (GeglOperation *op,
void *in_buf,
void *aux_buf,
void *out_buf,
glong n_pixels,
const GeglRectangle *roi,
gint level)
{
gfloat * GEGL_ALIGNED in = in_buf;
gfloat * GEGL_ALIGNED out = out_buf;
gfloat * GEGL_ALIGNED aux = aux_buf;
gint i;
if (aux == NULL)
{
gfloat value = GEGL_CHANT_PROPERTIES (op)->value;
for (i=0; i<n_pixels; i++)
{
gint j;
gfloat c;
for (j=0; j<3; j++)
{
c=in[j];
c = c - value;
out[j]=c;
}
out[3]=in[3];
in += 4;
out+= 4;
}
}
else
{
for (i=0; i<n_pixels; i++)
{
gint j;
gfloat c;
gfloat value;
for (j=0; j<3; j++)
{
c=in[j];
value=aux[j];
c = c - value;
out[j]=c;
}
out[3]=in[3];
in += 4;
aux += 3;
out+= 4;
}
}
return TRUE;
}
static void
gegl_chant_class_init (GeglChantClass *klass)
{
GeglOperationClass *operation_class;
GeglOperationPointComposerClass *point_composer_class;
operation_class = GEGL_OPERATION_CLASS (klass);
point_composer_class = GEGL_OPERATION_POINT_COMPOSER_CLASS (klass);
point_composer_class->process = process;
operation_class->prepare = prepare;
gegl_operation_class_set_keys (operation_class,
"name" , "gegl:subtract",
"categories" , "compositors:math",
"description" ,
_("Math operation subtract (c = c - value)"),
NULL);
}
#endif