add adjustable opacity

diff --git a/src/extension/internal/filter/drop-shadow.h b/src/extension/internal/filter/drop-shadow.h
index 7516bacf9820c5cf2496caded76624d4d1407856..e0785df30f561972b463a4835f77f2bc310a6f3a 100644 (file)
--- a/src/extension/internal/filter/drop-shadow.h
+++ b/src/extension/internal/filter/drop-shadow.h
@@ -34,15 +34,16 @@ public:
                        "<inkscape-extension xmlns=\"" INKSCAPE_EXTENSION_URI "\">\n"
                                "<name>" N_("Drop Shadow") "</name>\n"
                                "<id>org.inkscape.effect.filter.drop-shadow</id>\n"
-                               "<param name=\"blur\" gui-text=\"" N_("Amount of Blur") "\" type=\"float\" min=\"0.0\" max=\"50.0\">2.0</param>\n"
-                               "<param name=\"xoffset\" gui-text=\"" N_("Horizontal Offset") "\" type=\"float\" min=\"-50.0\" max=\"50.0\">4.0</param>\n"
-                               "<param name=\"yoffset\" gui-text=\"" N_("Vertical Offset") "\" type=\"float\" min=\"-50.0\" max=\"50.0\">4.0</param>\n"
+                               "<param name=\"blur\" gui-text=\"" N_("Blur radius, px") "\" type=\"float\" min=\"0.0\" max=\"200.0\">2.0</param>\n"
+                               "<param name=\"opacity\" gui-text=\"" N_("Opacity, %") "\" type=\"float\" min=\"0.0\" max=\"100.0\">50</param>\n"                               
+                               "<param name=\"xoffset\" gui-text=\"" N_("Horizontal offset, px") "\" type=\"float\" min=\"-50.0\" max=\"50.0\">4.0</param>\n"
+                               "<param name=\"yoffset\" gui-text=\"" N_("Vertical offset, px") "\" type=\"float\" min=\"-50.0\" max=\"50.0\">4.0</param>\n"
                                "<effect>\n"
                                        "<object-type>all</object-type>\n"
                                        "<effects-menu>\n"
                                                "<submenu name=\"" N_("Filter") "\" />\n"
                                        "</effects-menu>\n"
-                                       "<menu-tip>" N_("I hate text") "</menu-tip>\n"
+                                       "<menu-tip>" N_("Black, blurred drop shadow") "</menu-tip>\n"
                                "</effect>\n"
                        "</inkscape-extension>\n", new DropShadow());
        };
@@ -55,18 +56,20 @@ DropShadow::get_filter_text (Inkscape::Extension::Extension * ext)
        if (_filter != NULL) g_free((void *)_filter);
 
        float blur = ext->get_param_float("blur");
+       float opacity = ext->get_param_float("opacity") / 100;
        float x = ext->get_param_float("xoffset");
        float y = ext->get_param_float("yoffset");
 
        _filter = g_strdup_printf(
                "<filter>\n"
                        "<feGaussianBlur in=\"SourceAlpha\" stdDeviation=\"%f\" result=\"blur\"/>\n"
-                       "<feOffset in=\"blur\" dx=\"%f\" dy=\"%f\" result=\"offsetBlur\"/>\n"
+                        "<feColorMatrix result=\"bluralpha\" type=\"matrix\" values=\"1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 %f 0 \" />\n"
+                       "<feOffset in=\"bluralpha\" dx=\"%f\" dy=\"%f\" result=\"offsetBlur\"/>\n"
                        "<feMerge>\n"
                                "<feMergeNode in=\"offsetBlur\"/>\n"
                                "<feMergeNode in=\"SourceGraphic\"/>\n"
                        "</feMerge>\n"
-               "</filter>\n", blur, x, y);
+               "</filter>\n", blur, opacity, x, y);
 
        return _filter;
 };