From 173bd419c7e2a1eb1f13bf9fca89ac79aa37096e Mon Sep 17 00:00:00 2001
From: JazzyNico <nicoduf@yahoo.fr>
Date: Fri, 10 Sep 2010 22:18:10 +0200
Subject: [PATCH] Filters. New Customizable Colored Drop Shadow filter
 (experimental).

---
 src/extension/internal/filter/drop-shadow.h  | 65 ++++++++++++++++++++
 src/extension/internal/filter/filter-all.cpp |  1 +
 2 files changed, 66 insertions(+)

diff --git a/src/extension/internal/filter/drop-shadow.h b/src/extension/internal/filter/drop-shadow.h
index 12f0c6055..914d9cf9d 100644
--- a/src/extension/internal/filter/drop-shadow.h
+++ b/src/extension/internal/filter/drop-shadow.h
@@ -141,6 +141,71 @@ DropGlow::get_filter_text (Inkscape::Extension::Extension * ext)
 	return _filter;
 };
 
+class ColorizableDropShadow : public Inkscape::Extension::Internal::Filter::Filter {
+protected:
+	virtual gchar const * get_filter_text (Inkscape::Extension::Extension * ext);
+
+public:
+	ColorizableDropShadow ( ) : Filter() { };
+	virtual ~ColorizableDropShadow ( ) { 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_("Drop shadow, color -EXP-") "</name>\n"
+				"<id>org.inkscape.effect.filter.colorizable-drop-shadow</id>\n"
+				"<param name=\"blur\" gui-text=\"" N_("Blur radius (px):") "\" type=\"float\" min=\"0.0\" max=\"200.0\">3.0</param>\n"
+				"<param name=\"xoffset\" gui-text=\"" N_("Horizontal offset (px):") "\" type=\"float\" min=\"-50.0\" max=\"50.0\">6.0</param>\n"
+				"<param name=\"yoffset\" gui-text=\"" N_("Vertical offset (px):") "\" type=\"float\" min=\"-50.0\" max=\"50.0\">6.0</param>\n"
+				"<param name=\"color\" gui-text=\"" N_("Color") "\" type=\"color\">0</param>\n"
+				"<effect>\n"
+					"<object-type>all</object-type>\n"
+					"<effects-menu>\n"
+						"<submenu name=\"" N_("Filters") "\">\n"
+   						"<submenu name=\"" N_("Shadows and Glows") "\"/>\n"
+			      "</submenu>\n"
+					"</effects-menu>\n"
+					"<menu-tip>" N_("Colorizable Drop shadow") "</menu-tip>\n"
+				"</effect>\n"
+			"</inkscape-extension>\n", new ColorizableDropShadow());
+	};
+
+};
+
+gchar const *
+ColorizableDropShadow::get_filter_text (Inkscape::Extension::Extension * ext)
+{
+	if (_filter != NULL) g_free((void *)_filter);
+
+    std::ostringstream blur;
+    std::ostringstream a;
+    std::ostringstream r;
+    std::ostringstream g;
+    std::ostringstream b;
+    std::ostringstream x;
+    std::ostringstream y;
+
+    guint32 color = ext->get_param_color("color");
+
+    blur << ext->get_param_float("blur");
+    x << ext->get_param_float("xoffset");
+    y << ext->get_param_float("yoffset");
+    a << (color & 0xff) / 255.0F;
+    r << ((color >> 24) & 0xff);
+    g << ((color >> 16) & 0xff);
+    b << ((color >>  8) & 0xff);
+
+	_filter = g_strdup_printf(
+		"<filter xmlns:inkscape=\"http://www.inkscape.org/namespaces/inkscape\" color-interpolation-filters=\"sRGB\" height=\"1.2\" width=\"1.2\" y=\"-0.1\" x=\"-0.1\" inkscape:label=\"Drop shadow, color -EXP-\">\n"
+			"<feFlood flood-opacity=\"%s\" result=\"flood\" flood-color=\"rgb(%s,%s,%s)\" />\n"
+			"<feComposite in2=\"SourceGraphic\" in=\"flood\" result=\"composite\" operator=\"in\" />\n"
+			"<feGaussianBlur result=\"blur\" stdDeviation=\"%s\" in=\"composite\" />\n"
+			"<feOffset result=\"offsetBlur\" dx=\"%s\" dy=\"%s\" />\n"
+		"<feComposite in2=\"offsetBlur\" in=\"SourceGraphic\" operator=\"over\" result=\"compositeBlur\" />\n"
+		"</filter>\n", a.str().c_str(), r.str().c_str(), g.str().c_str(), b.str().c_str(), blur.str().c_str(), x.str().c_str(), y.str().c_str());
+
+	return _filter;
+};
 }; /* namespace Filter */
 }; /* namespace Internal */
 }; /* namespace Extension */
diff --git a/src/extension/internal/filter/filter-all.cpp b/src/extension/internal/filter/filter-all.cpp
index b4b8caf81..6d61501fb 100644
--- a/src/extension/internal/filter/filter-all.cpp
+++ b/src/extension/internal/filter/filter-all.cpp
@@ -23,6 +23,7 @@ Filter::filters_all (void )
 	// Here come the filters which are coded in C++ in order to present a parameters dialog
 	DropShadow::init();
 	DropGlow::init();
+    ColorizableDropShadow::init();
 	Snow::init();
 
 	// Here come the rest of the filters that are read from SVG files in share/filters and
-- 
2.30.2