/* 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 .
*
* Copyright 2006 Øyvind Kolås
* 2008 James Legg
*/
#include "config.h"
#include
#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 "weighted-blend.c"
#include "gegl-chant.h"
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", 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 *in = in_buf;
gfloat *out = out_buf;
gfloat *aux = aux_buf;
gint i;
if (aux == NULL)
{
/* there is no auxilary buffer.
* output the input buffer.
* gfloat value = GEGL_CHANT_PROPERTIES (op)->value;
*/
for (i = 0; i < n_pixels; i++)
{
gint j;
for (j = 0; j < 4; j++)
{
out[j] = in[j];
}
}
}
else
{
for (i=0; iprocess = process;
operation_class->prepare = prepare;
gegl_operation_class_set_keys (operation_class,
"name" , "gegl:weighted-blend",
"categories" , "compositors:blend",
"description",
_("blend two images using alpha values as weights"),
NULL);
}
#endif