/* 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>
* Copyright 2006 Geert Jordaens <geert.jordaens@telenet.be>
*/
#include "config.h"
#include <glib/gi18n-lib.h>
#ifdef GEGL_CHANT_PROPERTIES
gegl_chant_string (values, _("Values"), "", _("list of <number>s"))
#else
#define GEGL_CHANT_TYPE_POINT_FILTER
#define GEGL_CHANT_C_FILE "svg-saturate.c"
#include "gegl-chant.h"
#include <math.h>
#include <stdlib.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, "output", format);
}
static gboolean
process (GeglOperation *op,
void *in_buf,
void *out_buf,
glong n_pixels,
const GeglRectangle *roi,
gint level)
{
GeglChantO *o = GEGL_CHANT_PROPERTIES (op);
gfloat *in = in_buf;
gfloat *out = out_buf;
gfloat *m;
gfloat ma[25] = { 1.0, 0.0, 0.0, 0.0, 0.0,
0.0, 1.0, 0.0, 0.0, 0.0,
0.0, 0.0, 1.0, 0.0, 0.0,
0.0, 0.0, 0.0, 1.0, 0.0,
0.0, 0.0, 0.0, 0.0, 1.0};
char *endptr;
gfloat value;
const gchar delimiter=',';
const gchar *delimiters=" ";
gchar **values;
glong i;
m = ma;
if ( o->values != NULL )
{
g_strstrip(o->values);
g_strdelimit (o->values, delimiters, delimiter);
values = g_strsplit (o->values, &delimiter, 1);
if (values[0] != NULL)
{
value = g_ascii_strtod(values[0], &endptr);
if (endptr != values[0])
if ( value >= 0.0 && value <= 1.0 )
{
ma[0] = 0.213 + 0.787 * value;
ma[1] = 0.715 - 0.715 * value;
ma[2] = 0.072 - 0.072 * value;
ma[5] = 0.213 - 0.213 * value;
ma[6] = 0.715 + 0.285 * value;
ma[7] = 0.072 - 0.072 * value;
ma[10] = 0.213 - 0.213 * value;
ma[11] = 0.715 - 0.715 * value;
ma[12] = 0.072 + 0.928 * value;
}
}
g_strfreev(values);
}
for (i=0; i<n_pixels; i++)
{
out[0] = m[0] * in[0] + m[1] * in[1] + m[2] * in[2] + m[3] * in[3] + m[4];
out[1] = m[5] * in[0] + m[6] * in[1] + m[7] * in[2] + m[8] * in[3] + m[9];
out[2] = m[10] * in[0] + m[11] * in[1] + m[12] * in[2] + m[13] * in[3] + m[14];
out[3] = m[15] * in[0] + m[16] * in[1] + m[17] * in[2] + m[18] * in[3] + m[19];
in += 4;
out += 4;
}
return TRUE;
}
static void
gegl_chant_class_init (GeglChantClass *klass)
{
GeglOperationClass *operation_class;
GeglOperationPointFilterClass *point_filter_class;
operation_class = GEGL_OPERATION_CLASS (klass);
point_filter_class = GEGL_OPERATION_POINT_FILTER_CLASS (klass);
point_filter_class->process = process;
operation_class->prepare = prepare;
gegl_operation_class_set_keys (operation_class,
"name" , "gegl:svg-saturate",
"categories" , "compositors:svgfilter",
"description", _("SVG color matrix operation svg_saturate"),
NULL);
}
#endif