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#!/usr/bin/env ruby
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copyright = '
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/* !!!! AUTOGENERATED FILE generated by math.rb !!!!!
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*
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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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*
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* !!!! AUTOGENERATED FILE !!!!!
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*/'
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a = [
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['add', 'c = c + value', 0.0],
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['subtract', 'c = c - value', 0.0],
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['multiply', 'c = c * value', 1.0],
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['divide', 'c = value==0.0f?0.0f:c/value', 1.0],
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['gamma', 'c = powf (c, value)', 1.0],
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# ['threshold', 'c = c>=value?1.0f:0.0f', 0.5],
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# ['invert', 'c = 1.0-c']
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]
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a.each do
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|item|
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name = item[0] + ''
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filename = name + '.c'
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puts "generating #{filename}"
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file = File.open(filename, 'w')
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name = item[0]
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capitalized = name.capitalize
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swapcased = name.swapcase
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formula = item[1]
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file.write copyright
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file.write "
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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_double (value, _(\"Value\"), -G_MAXDOUBLE, G_MAXDOUBLE, #{item[2]}, _(\"global value used if aux doesn't contain data\"))
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#else
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#define GEGL_CHANT_TYPE_POINT_COMPOSER
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#define GEGL_CHANT_C_FILE \"#{filename}\"
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#include \"gegl-chant.h\"
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#include <math.h>
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#ifdef _MSC_VER
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#define powf(a,b) ((gfloat)pow(a,b))
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#endif
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static void prepare (GeglOperation *operation)
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{
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const Babl *format = babl_format (\"RGBA float\");
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gegl_operation_set_format (operation, \"input\", format);
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gegl_operation_set_format (operation, \"aux\", babl_format (\"RGB float\"));
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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 *aux_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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gfloat * GEGL_ALIGNED in = in_buf;
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gfloat * GEGL_ALIGNED out = out_buf;
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gfloat * GEGL_ALIGNED aux = aux_buf;
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gint i;
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if (aux == NULL)
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{
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gfloat value = GEGL_CHANT_PROPERTIES (op)->value;
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for (i=0; i
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{
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gint j;
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gfloat c;
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for (j=0; j<3; j++)
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{
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c=in[j];
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#{formula};
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out[j]=c;
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}
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out[3]=in[3];
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in += 4;
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out+= 4;
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}
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}
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else
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{
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for (i=0; i
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{
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gint j;
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gfloat c;
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gfloat value;
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for (j=0; j<3; j++)
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{
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c=in[j];
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value=aux[j];
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#{formula};
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out[j]=c;
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}
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out[3]=in[3];
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in += 4;
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aux += 3;
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out+= 4;
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}
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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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GeglOperationPointComposerClass *point_composer_class;
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operation_class = GEGL_OPERATION_CLASS (klass);
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point_composer_class = GEGL_OPERATION_POINT_COMPOSER_CLASS (klass);
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point_composer_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:#{name}\",
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\"categories\" , \"compositors:math\",
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\"description\" ,
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_(\"Math operation #{name} (#{formula})\"),
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NULL);
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}
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#endif
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"
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file.close
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end
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