From 0747a715dfb923b3830645003fd63749786d6c09 Mon Sep 17 00:00:00 2001
From: JazzyNico <nicoduf@yahoo.fr>
Date: Tue, 14 Sep 2010 20:21:32 +0200
Subject: [PATCH] Filters. New customizable Poster effect (experimental).

---
 src/extension/internal/filter/experimental.h | 100 +++++++++++++++++++
 src/extension/internal/filter/filter-all.cpp |   4 +
 2 files changed, 104 insertions(+)
 create mode 100644 src/extension/internal/filter/experimental.h

diff --git a/src/extension/internal/filter/experimental.h b/src/extension/internal/filter/experimental.h
new file mode 100644
index 000000000..af5a37b45
--- /dev/null
+++ b/src/extension/internal/filter/experimental.h
@@ -0,0 +1,100 @@
+#ifndef __INKSCAPE_EXTENSION_INTERNAL_FILTER_EXPERIMENTAL_H__
+#define __INKSCAPE_EXTENSION_INTERNAL_FILTER_EXPERIMENTAL_H__
+/* Change the 'EXPERIMENTAL' above to be your file name */
+
+/*
+ * Copyright (C) 2010 Authors:
+ *   Ivan Louette (filters)
+ *   Nicolas Dufour (UI) <nicoduf@yahoo.fr>
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+/* ^^^ Change the copyright to be you and your e-mail address ^^^ */
+
+#include "filter.h"
+
+#include "extension/internal/clear-n_.h"
+#include "extension/system.h"
+#include "extension/extension.h"
+
+namespace Inkscape {
+namespace Extension {
+namespace Internal {
+namespace Filter {
+
+class Posterize : public Inkscape::Extension::Internal::Filter::Filter {
+protected:
+	virtual gchar const * get_filter_text (Inkscape::Extension::Extension * ext);
+
+public:
+	Posterize ( ) : Filter() { };
+	virtual ~Posterize ( ) { if (_filter != NULL) g_free((void *)_filter); return; }
+
+	static void init (void) {
+		Inkscape::Extension::build_from_mem(
+			"<inkscape-extension xmlns=\"" INKSCAPE_EXTENSION_URI "\">\n"
+				"<name>" N_("Posterize, custom -EXP-") "</name>\n"
+				"<id>org.inkscape.effect.filter.Posterize</id>\n"
+                "<param name=\"type\" gui-text=\"" N_("Type:") "\" type=\"enum\">\n"
+                    "<_item value=\"normal\">Normal</_item>\n"
+                    "<_item value=\"contrasted\">Contrasted</_item>\n"
+                "</param>\n"
+                "<param name=\"level\" gui-text=\"" N_("Level:") "\" type=\"int\" min=\"1\" max=\"10\">3</param>\n"
+				"<effect>\n"
+					"<object-type>all</object-type>\n"
+					"<effects-menu>\n"
+						"<submenu name=\"" N_("Filters") "\">\n"
+   						"<submenu name=\"" N_("Experimental") "\"/>\n"
+			      "</submenu>\n"
+					"</effects-menu>\n"
+					"<menu-tip>" N_("Change colors to a two colors palette") "</menu-tip>\n"
+				"</effect>\n"
+			"</inkscape-extension>\n", new Posterize());
+	};
+
+};
+
+gchar const *
+Posterize::get_filter_text (Inkscape::Extension::Extension * ext)
+{
+	if (_filter != NULL) g_free((void *)_filter);
+
+    std::ostringstream transf;
+
+    int level = ext->get_param_int("level") + 1;
+    const gchar *type = ext->get_param_enum("type");
+    float val = 0.0;
+    transf << "0";
+    for ( int step = 1 ; step <= level ; step++ ) {
+        val = (float) step / level;
+        transf << " " << val;
+        if((g_ascii_strcasecmp("contrasted", type) == 0)) {
+            transf << " " << (val - ((float) 1 / (3 * level))) << " " << (val + ((float) 1 / (2 * level)));
+        }
+    }
+    transf << " 1";
+
+	_filter = g_strdup_printf(
+		"<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"
+            "<feGaussianBlur stdDeviation=\"1.5\" result=\"result3\" />\n"
+            "<feGaussianBlur stdDeviation=\"1.5\" in=\"SourceGraphic\" result=\"result4\" />\n"
+            "<feBlend in2=\"result3\" blend=\"normal\" mode=\"lighten\" />\n"
+            "<feComponentTransfer result=\"result1\">\n"
+                "<feFuncR type=\"discrete\" tableValues=\"%s\" />\n"
+                "<feFuncG type=\"discrete\" tableValues=\"%s\" />\n"
+                "<feFuncB type=\"discrete\" tableValues=\"%s\" />\n"
+            "</feComponentTransfer>\n"
+            "<feColorMatrix type=\"saturate\" values=\"1\" />\n"
+            "<feGaussianBlur stdDeviation=\"0.01\" />\n"
+            "<feComposite in2=\"SourceGraphic\" operator=\"atop\" result=\"result2\" />\n"
+        "</filter>\n", transf.str().c_str(), transf.str().c_str(), transf.str().c_str());
+
+	return _filter;
+};
+}; /* namespace Filter */
+}; /* namespace Internal */
+}; /* namespace Extension */
+}; /* namespace Inkscape */
+
+/* Change the 'COLOR' below to be your file name */
+#endif /* __INKSCAPE_EXTENSION_INTERNAL_FILTER_EXPERIMENTAL_H__ */
diff --git a/src/extension/internal/filter/filter-all.cpp b/src/extension/internal/filter/filter-all.cpp
index ef168e09e..6920e1bac 100644
--- a/src/extension/internal/filter/filter-all.cpp
+++ b/src/extension/internal/filter/filter-all.cpp
@@ -11,6 +11,7 @@
 #include "color.h"
 #include "drop-shadow.h"
 #include "snow.h"
+#include "experimental.h"
 
 namespace Inkscape {
 namespace Extension {
@@ -27,6 +28,9 @@ Filter::filters_all (void )
 	DropGlow::init();
     ColorizableDropShadow::init();
 	Snow::init();
+    
+    // Experimental!
+    Posterize::init();
 
 	// Here come the rest of the filters that are read from SVG files in share/filters and
 	// .config/Inkscape/filters
-- 
2.30.2