/* !!!! AUTOGENERATED FILE generated by svg12-blend.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, 2007 Øyvind Kolås <pippin@gimp.org>

 *            2007 John Marshall

 *

 * SVG rendering modes; see:

 *     http://www.w3.org/TR/SVG12/rendering.html

 *     http://www.w3.org/TR/2004/WD-SVG12-20041027/rendering.html#comp-op-prop

 *

 *     aA = aux(src) alpha      aB = in(dst) alpha      aD = out alpha

 *     cA = aux(src) colour     cB = in(dst) colour     cD = out colour

 *

 * !!!! AUTOGENERATED FILE !!!!!

 */

#include "config.h"

#include <glib/gi18n-lib.h>

#ifdef GEGL_CHANT_PROPERTIES

/* no properties */

#else

#define GEGL_CHANT_TYPE_POINT_COMPOSER

#define GEGL_CHANT_C_FILE        "darken.c"

#include "gegl-chant.h"

static void prepare (GeglOperation *operation)

{

  const Babl *format = babl_format ("RaGaBaA float");

  gegl_operation_set_format (operation, "input", format);

  gegl_operation_set_format (operation, "aux", format);

  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 aux = aux_buf;

  gfloat * GEGL_ALIGNED out = out_buf;

  gint    i;

  if (aux==NULL)

    return TRUE;

  for (i = 0; i < n_pixels; i++)

    {

      gfloat aA, aB, aD;

      gint   j;

      aB = in[3];

      aA = aux[3];

      aD = aA + aB - aA * aB;

      for (j = 0; j < 3; j++)

        {

          gfloat cA, cB;

          cB = in[j];

          cA = aux[j];

          out[j] = CLAMP (MIN (cA * aB, cB * aA) + cA * (1 - aB) + cB * (1 - aA), 0, aD);

        }

      out[3] = aD;

      in  += 4;

      aux += 4;

      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;

  operation_class->compat_name = "gegl:darken";

  gegl_operation_class_set_keys (operation_class,

  "name"        , "svg:darken",

  "description" ,

        _("SVG blend operation darken (<tt>d = MIN (cA * aB, cB * aA) + cA * (1 - aB) + cB * (1 - aA)</tt>)"),

        NULL);

  gegl_operation_class_set_key (operation_class, "categories", "compositors:svgfilter");

}

#endif