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/* This file is an image processing operation for GEGL
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*
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* GEGL is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or (at your option) any later version.
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*
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* GEGL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with GEGL; if not, see <http://www.gnu.org/licenses/>.
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*
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* Copyright 2006 Øyvind Kolås <pippin@gimp.org>
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* Copyright 2006 Geert Jordaens <geert.jordaens@telenet.be>
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*/
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#include "config.h"
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#include <glib/gi18n-lib.h>
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#ifdef GEGL_CHANT_PROPERTIES
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gegl_chant_string (values, _("Values"), "", _("list of <number>s"))
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#else
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#define GEGL_CHANT_TYPE_POINT_FILTER
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#define GEGL_CHANT_C_FILE "svg-matrix.c"
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#include "gegl-chant.h"
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#include <math.h>
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#include <stdlib.h>
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static void prepare (GeglOperation *operation)
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{
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const Babl *format = babl_format ("RaGaBaA float");
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gegl_operation_set_format (operation, "input", format);
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gegl_operation_set_format (operation, "output", format);
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}
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static gboolean
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process (GeglOperation *op,
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void *in_buf,
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void *out_buf,
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glong n_pixels,
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const GeglRectangle *roi,
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gint level)
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{
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GeglChantO *o = GEGL_CHANT_PROPERTIES (op);
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gfloat *in = in_buf;
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gfloat *out = out_buf;
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gfloat *m;
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gfloat mi[25] = { 1.0, 0.0, 0.0, 0.0, 0.0,
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0.0, 1.0, 0.0, 0.0, 0.0,
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0.0, 0.0, 1.0, 0.0, 0.0,
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0.0, 0.0, 0.0, 1.0, 0.0,
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0.0, 0.0, 0.0, 0.0, 1.0};
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gfloat ma[25] = { 1.0, 0.0, 0.0, 0.0, 0.0,
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0.0, 1.0, 0.0, 0.0, 0.0,
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0.0, 0.0, 1.0, 0.0, 0.0,
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0.0, 0.0, 0.0, 1.0, 0.0,
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0.0, 0.0, 0.0, 0.0, 1.0};
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char *endptr;
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gfloat value;
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const gchar delimiter=',';
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const gchar *delimiters=" ";
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gchar **values;
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glong i;
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m = ma;
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if (o->values != NULL)
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{
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g_strstrip(o->values);
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g_strdelimit (o->values, delimiters, delimiter);
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values = g_strsplit (o->values, ",", 20);
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for (i = 0 ; i < 20 ; i++)
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if ( values[i] != NULL )
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{
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value = g_ascii_strtod(values[i], &endptr);
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if (endptr != values[i])
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ma[i] = value;
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else
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{
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m = mi;
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i = 21;
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}
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}
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else
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{
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m = mi;
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i = 21;
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}
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g_strfreev(values);
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}
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for (i=0; i
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{
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out[0] = m[0] * in[0] + m[1] * in[1] + m[2] * in[2] + m[3] * in[3] + m[4];
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out[1] = m[5] * in[0] + m[6] * in[1] + m[7] * in[2] + m[8] * in[3] + m[9];
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out[2] = m[10] * in[0] + m[11] * in[1] + m[12] * in[2] + m[13] * in[3] + m[14];
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out[3] = m[15] * in[0] + m[16] * in[1] + m[17] * in[2] + m[18] * in[3] + m[19];
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in += 4;
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out += 4;
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}
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return TRUE;
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}
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static void
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gegl_chant_class_init (GeglChantClass *klass)
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{
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GeglOperationClass *operation_class;
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GeglOperationPointFilterClass *point_filter_class;
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operation_class = GEGL_OPERATION_CLASS (klass);
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point_filter_class = GEGL_OPERATION_POINT_FILTER_CLASS (klass);
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point_filter_class->process = process;
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operation_class->prepare = prepare;
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gegl_operation_class_set_keys (operation_class,
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"name" , "gegl:svg-matrix",
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"categories" , "compositors:svgfilter",
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"description", _("SVG color matrix operation svg_matrix"),
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NULL);
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}
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#endif
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