src/extension/internal/filter/experimental.h

   1 #ifndef __INKSCAPE_EXTENSION_INTERNAL_FILTER_EXPERIMENTAL_H__
   2 #define __INKSCAPE_EXTENSION_INTERNAL_FILTER_EXPERIMENTAL_H__
   3 /* Change the 'EXPERIMENTAL' above to be your file name */
   4
   5 /*
   6  * Copyright (C) 2010 Authors:
   7  *   Ivan Louette (filters)
   8  *   Nicolas Dufour (UI) <nicoduf@yahoo.fr>
   9  *
  10  * Released under GNU GPL, read the file 'COPYING' for more information
  11  */
  12 /* ^^^ Change the copyright to be you and your e-mail address ^^^ */
  13
  14 #include "filter.h"
  15
  16 #include "extension/internal/clear-n_.h"
  17 #include "extension/system.h"
  18 #include "extension/extension.h"
  19
  20 namespace Inkscape {
  21 namespace Extension {
  22 namespace Internal {
  23 namespace Filter {
  24
  25 class Posterize : public Inkscape::Extension::Internal::Filter::Filter {
  26 protected:
  27         virtual gchar const * get_filter_text (Inkscape::Extension::Extension * ext);
  28
  29 public:
  30         Posterize ( ) : Filter() { };
  31         virtual ~Posterize ( ) { if (_filter != NULL) g_free((void *)_filter); return; }
  32
  33         static void init (void) {
  34                 Inkscape::Extension::build_from_mem(
  35                         "<inkscape-extension xmlns=\"" INKSCAPE_EXTENSION_URI "\">\n"
  36                                 "<name>" N_("Posterize, custom -EXP-") "</name>\n"
  37                                 "<id>org.inkscape.effect.filter.Posterize</id>\n"
  38                 "<param name=\"type\" gui-text=\"" N_("Type:") "\" type=\"enum\">\n"
  39                     "<_item value=\"normal\">Normal</_item>\n"
  40                     "<_item value=\"contrasted\">Contrasted</_item>\n"
  41                 "</param>\n"
  42                 "<param name=\"level\" gui-text=\"" N_("Level:") "\" type=\"int\" min=\"1\" max=\"10\">3</param>\n"
  43                                 "<effect>\n"
  44                                         "<object-type>all</object-type>\n"
  45                                         "<effects-menu>\n"
  46                                                 "<submenu name=\"" N_("Filters") "\">\n"
  47                                                 "<submenu name=\"" N_("Experimental") "\"/>\n"
  48                               "</submenu>\n"
  49                                         "</effects-menu>\n"
  50                                         "<menu-tip>" N_("Change colors to a two colors palette") "</menu-tip>\n"
  51                                 "</effect>\n"
  52                         "</inkscape-extension>\n", new Posterize());
  53         };
  54
  55 };
  56
  57 gchar const *
  58 Posterize::get_filter_text (Inkscape::Extension::Extension * ext)
  59 {
  60         if (_filter != NULL) g_free((void *)_filter);
  61
  62     std::ostringstream transf;
  63
  64     int level = ext->get_param_int("level") + 1;
  65     const gchar *type = ext->get_param_enum("type");
  66     float val = 0.0;
  67     transf << "0";
  68     for ( int step = 1 ; step <= level ; step++ ) {
  69         val = (float) step / level;
  70         transf << " " << val;
  71         if((g_ascii_strcasecmp("contrasted", type) == 0)) {
  72             transf << " " << (val - ((float) 1 / (3 * level))) << " " << (val + ((float) 1 / (2 * level)));
  73         }
  74     }
  75     transf << " 1";
  76
  77         _filter = g_strdup_printf(
  78                 "<filter xmlns:inkscape=\"http://www.inkscape.org/namespaces/inkscape\" color-interpolation-filters=\"sRGB\" height=\"1\" width=\"1\" y=\"0\" x=\"0\" inkscape:label=\"Posterize, custom -EXP-\">\n"
  79             "<feGaussianBlur stdDeviation=\"1.5\" result=\"result3\" />\n"
  80             "<feGaussianBlur stdDeviation=\"1.5\" in=\"SourceGraphic\" result=\"result4\" />\n"
  81             "<feBlend in2=\"result3\" blend=\"normal\" mode=\"lighten\" />\n"
  82             "<feComponentTransfer result=\"result1\">\n"
  83                 "<feFuncR type=\"discrete\" tableValues=\"%s\" />\n"
  84                 "<feFuncG type=\"discrete\" tableValues=\"%s\" />\n"
  85                 "<feFuncB type=\"discrete\" tableValues=\"%s\" />\n"
  86             "</feComponentTransfer>\n"
  87             "<feColorMatrix type=\"saturate\" values=\"1\" />\n"
  88             "<feGaussianBlur stdDeviation=\"0.01\" />\n"
  89             "<feComposite in2=\"SourceGraphic\" operator=\"atop\" result=\"result2\" />\n"
  90         "</filter>\n", transf.str().c_str(), transf.str().c_str(), transf.str().c_str());
  91
  92         return _filter;
  93 };
  94 }; /* namespace Filter */
  95 }; /* namespace Internal */
  96 }; /* namespace Extension */
  97 }; /* namespace Inkscape */
  98
  99 /* Change the 'COLOR' below to be your file name */
 100 #endif /* __INKSCAPE_EXTENSION_INTERNAL_FILTER_EXPERIMENTAL_H__ */