/* !!!! 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 "svg-multiply.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,
int level)
{
gfloat *in = in_buf;
gfloat *aux = aux_buf;
gfloat *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 (cA * cB + 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;
gegl_operation_class_set_keys (operation_class,
"name" , "gegl:svg-multiply",
"categories" , "compositors:svgfilter",
"description",
_("SVG blend operation svg-multiply (<tt>d = cA * cB + cA * (1 - aB) + cB * (1 - aA)</tt>)"),
NULL);
}
#endif