new file for filter manipulation stuff

(bzr r1775)

1 files changed, 91 insertions, 0 deletions

diff --git a/src/filter-chemistry.cpp b/src/filter-chemistry.cpp
new file mode 100644
index 000000000..0b374160c
--- /dev/null
+++ b/src/filter-chemistry.cpp
@@ -0,0 +1,91 @@
+#define __SP_FILTER_CHEMISTRY_C__
+
+/*
+ * Various utility methods for filters
+ *
+ * Authors:
+ *   Hugo Rodrigues
+ *   bulia byak
+ *
+ * Copyright (C) 2006 authors
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+
+#include "style.h"
+#include "document-private.h"
+#include "desktop-style.h"
+
+#include "sp-filter.h"
+#include "sp-gaussian-blur.h"
+#include "svg/css-ostringstream.h"
+
+#include "xml/repr.h"
+
+/**
+ * Creates a filter with blur primitive of specified stdDeviation
+ */
+SPFilter *
+new_filter_gaussian_blur (SPDocument *document, gdouble stdDeviation)
+{
+    g_return_val_if_fail(document != NULL, NULL);
+
+    SPDefs *defs = (SPDefs *) SP_DOCUMENT_DEFS(document);
+
+    // create a new private filter
+    Inkscape::XML::Node *repr;
+    repr = sp_repr_new("svg:filter");
+    repr->setAttribute("inkscape:collect", "always");
+
+    //create feGaussianBlur node
+    Inkscape::XML::Node *b_repr;
+    b_repr = sp_repr_new("svg:feGaussianBlur");
+    b_repr->setAttribute("inkscape:collect", "always");
+    
+    //set stdDeviation attribute
+    Inkscape::CSSOStringStream os;
+    os << stdDeviation;
+    b_repr->setAttribute("stdDeviation", os.str().c_str());
+    
+    //set feGaussianBlur as child of filter node
+    repr->appendChild(b_repr);
+    Inkscape::GC::release(b_repr);
+    
+    // Append the new filter node to defs
+    SP_OBJECT_REPR(defs)->appendChild(repr);
+    Inkscape::GC::release(repr);
+
+    // get corresponding object
+    SPFilter *f = SP_FILTER( document->getObjectByRepr(repr) );
+    SPGaussianBlur *b = SP_GAUSSIANBLUR( document->getObjectByRepr(b_repr) );
+    
+    g_assert(f != NULL);
+    g_assert(SP_IS_FILTER(f));
+    g_assert(b != NULL);
+    g_assert(SP_IS_GAUSSIANBLUR(b));
+
+    return f;
+}
+
+void remove_filter (SPObject *item, bool recursive)
+{
+	SPCSSAttr *css = sp_repr_css_attr_new ();
+	sp_repr_css_unset_property (css, "filter");
+	if (recursive)
+		sp_repr_css_change_recursive(SP_OBJECT_REPR(item), css, "style");
+	else
+		sp_repr_css_change (SP_OBJECT_REPR(item), css, "style");
+      sp_repr_css_attr_unref (css);
+}
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :