/* 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>
*/
#include "config.h"
#include <glib/gi18n-lib.h>
#ifdef GEGL_CHANT_PROPERTIES
gegl_chant_double (dampness, _("Dampness"), 0.0, 1.0, 0.95,
_("The value represents the contribution of the past to the new frame."))
#else
#define GEGL_CHANT_TYPE_FILTER
#define GEGL_CHANT_C_FILE "mblur.c"
#include "gegl-chant.h"
typedef struct
{
GeglBuffer *acc;
} Priv;
static void
init (GeglChantO *o)
{
Priv *priv = (Priv*)o->chant_data;
GeglRectangle extent = {0,0,1024,1024};
g_assert (priv == NULL);
priv = g_new0 (Priv, 1);
o->chant_data = (void*) priv;
priv->acc = gegl_buffer_new (&extent, babl_format ("RGBA float"));
}
static void prepare (GeglOperation *operation)
{
gegl_operation_set_format (operation, "output", babl_format ("RGBA float"));
}
static gboolean
process (GeglOperation *operation,
GeglBuffer *input,
GeglBuffer *output,
const GeglRectangle *result,
gint level)
{
GeglChantO *o;
Priv *p;
o = GEGL_CHANT_PROPERTIES (operation);
p = (Priv*)o->chant_data;
if (p == NULL)
init (o);
p = (Priv*)o->chant_data;
{
GeglBuffer *temp_in;
temp_in = gegl_buffer_create_sub_buffer (input, result);
{
gint pixels = result->width * result->height;
gfloat *buf = g_new (gfloat, pixels * 4);
gfloat *acc = g_new (gfloat, pixels * 4);
gfloat dampness;
gint i;
gegl_buffer_get (p->acc, result, 1.0, babl_format ("RGBA float"), acc, GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
gegl_buffer_get (temp_in, result, 1.0, babl_format ("RGBA float"), buf, GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
dampness = o->dampness;
for (i=0;i<pixels;i++)
{
gint c;
for (c=0;c<4;c++)
acc[i*4+c]=acc[i*4+c]*dampness + buf[i*4+c]*(1.0-dampness);
}
gegl_buffer_set (p->acc, result, 0, babl_format ("RGBA float"), acc, GEGL_AUTO_ROWSTRIDE);
gegl_buffer_set (output, result, 0, babl_format ("RGBA float"), acc, GEGL_AUTO_ROWSTRIDE);
g_free (buf);
g_free (acc);
}
g_object_unref (temp_in);
}
return TRUE;
}
static void
finalize (GObject *object)
{
GeglChantO *o = GEGL_CHANT_PROPERTIES (object);
if (o->chant_data)
{
Priv *p = (Priv*)o->chant_data;
g_object_unref (p->acc);
g_free (o->chant_data);
o->chant_data = NULL;
}
G_OBJECT_CLASS (gegl_chant_parent_class)->finalize (object);
}
static void
gegl_chant_class_init (GeglChantClass *klass)
{
GeglOperationClass *operation_class;
GeglOperationFilterClass *filter_class;
G_OBJECT_CLASS (klass)->finalize = finalize;
operation_class = GEGL_OPERATION_CLASS (klass);
filter_class = GEGL_OPERATION_FILTER_CLASS (klass);
filter_class->process = process;
operation_class->prepare = prepare;
gegl_operation_class_set_keys (operation_class,
"name" , "gegl:mblur",
"categories" , "blur:video",
"description", _("Accumulating motion blur"),
NULL);
}
#endif