/* !!!! 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

        {

          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

        {

          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