r19136@shi: ted | 2008-04-24 19:44:01 -0700

[inkscape.git] / src / extension / internal / filter / filter.cpp

diff --git a/src/extension/internal/filter/filter.cpp b/src/extension/internal/filter/filter.cpp
index e87290ab4dfb752f5d1966e7b2d55cad01ba961c..b2a55b6e6154a9c1522378bd133ad66185f32408 100644 (file)
--- a/src/extension/internal/filter/filter.cpp
+++ b/src/extension/internal/filter/filter.cpp
@@ -71,7 +71,7 @@ Filter::get_filter (Inkscape::Extension::Extension * ext) {
 }
 
 void 
-Filter::merge_filters (Inkscape::XML::Node * to, Inkscape::XML::Node * from, Inkscape::XML::Document * doc)
+Filter::merge_filters (Inkscape::XML::Node * to, Inkscape::XML::Node * from, Inkscape::XML::Document * doc, gchar * srcGraphic, gchar * srcGraphicAlpha)
 {
        if (from == NULL) return;
 
@@ -82,6 +82,16 @@ Filter::merge_filters (Inkscape::XML::Node * to, Inkscape::XML::Node * from, Ink
                //printf("Attribute List: %s\n", attr);
                if (!strcmp(attr, "id")) continue; // nope, don't copy that one!
                to->setAttribute(attr, from->attribute(attr));
+
+               if (!strcmp(attr, "in") || !strcmp(attr, "in2") || !strcmp(attr, "in3")) {
+                       if (srcGraphic != NULL && !strcmp(from->attribute(attr), "SourceGraphic")) {
+                               to->setAttribute(attr, srcGraphic);
+                       }
+
+                       if (srcGraphicAlpha != NULL && !strcmp(from->attribute(attr), "SourceAlpha")) {
+                               to->setAttribute(attr, srcGraphicAlpha);
+                       }
+               }
        }
 
        // for each child call recursively
@@ -92,12 +102,19 @@ Filter::merge_filters (Inkscape::XML::Node * to, Inkscape::XML::Node * from, Ink
                
                Inkscape::XML::Node * to_child = doc->createElement(name.c_str());
                to->appendChild(to_child);
-               merge_filters(to_child, from_child, doc);
+               merge_filters(to_child, from_child, doc, srcGraphic, srcGraphicAlpha);
+
+               if (from_child == from->firstChild() && !strcmp("filter", from->name()) && srcGraphic != NULL && to_child->attribute("in") == NULL) {
+                       to_child->setAttribute("in", srcGraphic);
+               }
        }
 
        return;
 }
 
+#define FILTER_SRC_GRAPHIC       "fbSourceGraphic"
+#define FILTER_SRC_GRAPHIC_ALPHA "fbSourceGraphicAlpha"
+
 void
 Filter::effect (Inkscape::Extension::Effect *module, Inkscape::UI::View::View *document, Inkscape::Extension::Implementation::ImplementationDocumentCache * docCache)
 {
@@ -129,6 +146,35 @@ Filter::effect (Inkscape::Extension::Effect *module, Inkscape::UI::View::View *d
 
                        sp_repr_css_set_property(css, "filter", url.c_str());
                        sp_repr_css_set(node, css, "style");
+               } else {
+                       if (strncmp(filter, "url(#", strlen("url(#")) || filter[strlen(filter) - 1] != ')') {
+                               // This is not url(#id) -- we can't handle it
+                               continue;
+                       }
+
+                       gchar * lfilter = g_strndup(filter + 5, strlen(filter) - 6);
+                       Inkscape::XML::Node * filternode = NULL;
+                       for (Inkscape::XML::Node * child = defsrepr->firstChild(); child != NULL; child = child->next()) {
+                               if (!strcmp(lfilter, child->attribute("id"))) {
+                                       filternode = child;
+                                       break;
+                               }
+                       }
+                       g_free(lfilter);
+
+                       if (filternode == NULL) {
+                               continue;
+                       }
+
+                       filternode->lastChild()->setAttribute("result", FILTER_SRC_GRAPHIC);
+
+                       Inkscape::XML::Node * alpha = xmldoc->createElement("svg:feColorMatrix");
+                       alpha->setAttribute("result", FILTER_SRC_GRAPHIC_ALPHA);
+                       alpha->setAttribute("in", FILTER_SRC_GRAPHIC); // not required, but we're being explicit
+                       alpha->setAttribute("values", "0 0 0 -1 0 0 0 0 -1 0 0 0 0 -1 0 0 0 0 1 0");
+                       filternode->appendChild(alpha);
+
+                       merge_filters(filternode, get_filter(module)->root(), xmldoc, FILTER_SRC_GRAPHIC, FILTER_SRC_GRAPHIC_ALPHA);
                }
     }