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diff --git a/src/display/nr-filter-blend.h b/src/display/nr-filter-blend.h
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+++ b/src/display/nr-filter-blend.h
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+// SPDX-License-Identifier: GPL-2.0-or-later
+#ifndef SEEN_NR_FILTER_BLEND_H
+#define SEEN_NR_FILTER_BLEND_H
+
+/*
+ * SVG feBlend renderer
+ *
+ * "This filter composites two objects together using commonly used
+ * imaging software blending modes. It performs a pixel-wise combination
+ * of two input images."
+ * http://www.w3.org/TR/SVG11/filters.html#feBlend
+ *
+ * Authors:
+ *   Niko Kiirala <niko@kiirala.com>
+ *
+ * Copyright (C) 2007 authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+#include <set>
+#include "style-enums.h"
+#include "display/nr-filter-primitive.h"
+
+namespace Inkscape {
+namespace Filters {
+
+class FilterBlend : public FilterPrimitive {
+public:
+    FilterBlend();
+    static FilterPrimitive *create();
+    ~FilterBlend() override;
+
+    void render_cairo(FilterSlot &slot) override;
+    bool can_handle_affine(Geom::Affine const &) override;
+    double complexity(Geom::Affine const &ctm) override;
+    bool uses_background() override;
+
+    void set_input(int slot) override;
+    void set_input(int input, int slot) override;
+    void set_mode(SPBlendMode mode);
+
+    Glib::ustring name() override { return Glib::ustring("Blend"); }
+
+private:
+    static const std::set<SPBlendMode> _valid_modes;
+    SPBlendMode _blend_mode;
+    int _input2;
+};
+
+
+} /* namespace Filters */
+} /* namespace Inkscape */
+
+
+
+
+#endif /* __NR_FILTER_BLEND_H__ */
+/*
+  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:fileencoding=utf-8:textwidth=99 :