1 files changed, 78 insertions, 0 deletions
diff --git a/src/object/filters/sp-filter-primitive.h b/src/object/filters/sp-filter-primitive.h
new file mode 100644
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--- /dev/null
+++ b/src/object/filters/sp-filter-primitive.h
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+#ifndef SEEN_SP_FILTER_PRIMITIVE_H
+#define SEEN_SP_FILTER_PRIMITIVE_H
+
+/** \file
+ * Document level base class for all SVG filter primitives.
+ */
+/*
+ * Authors:
+ *   Hugo Rodrigues <haa.rodrigues@gmail.com>
+ *   Niko Kiirala <niko@kiirala.com>
+ *
+ * Copyright (C) 2006,2007 Authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include "2geom/rect.h"
+#include "../sp-object.h"
+#include "../sp-dimensions.h"
+
+#define SP_FILTER_PRIMITIVE(obj) (dynamic_cast<SPFilterPrimitive*>((SPObject*)obj))
+#define SP_IS_FILTER_PRIMITIVE(obj) (dynamic_cast<const SPFilterPrimitive*>((SPObject*)obj) != NULL)
+
+namespace Inkscape {
+namespace Filters {
+class Filter;
+class FilterPrimitive;
+} }
+
+class SPFilterPrimitive : public SPObject, public SPDimensions {
+public:
+	SPFilterPrimitive();
+	~SPFilterPrimitive() override;
+
+    int image_in, image_out;
+
+protected:
+	void build(SPDocument* doc, Inkscape::XML::Node* repr) override;
+	void release() override;
+
+	void set(SPAttr key, char const* value) override;
+
+	void update(SPCtx* ctx, unsigned int flags) override;
+
+	Inkscape::XML::Node* write(Inkscape::XML::Document* doc, Inkscape::XML::Node* repr, unsigned int flags) override;
+
+public:
+	virtual void build_renderer(Inkscape::Filters::Filter* filter) = 0;
+
+        /* Calculate the filter's effect on the region */
+        virtual Geom::Rect calculate_region(Geom::Rect region);
+
+        /* Return true if the object should be allowed to use this filter */
+        virtual bool valid_for(SPObject const *obj) const {
+            // This is used by feImage to stop infinate loops.
+            return true;
+        };
+
+	/* Common initialization for filter primitives */
+	void renderer_common(Inkscape::Filters::FilterPrimitive *nr_prim);
+
+	int name_previous_out();
+	int read_in(char const *name);
+	int read_result(char const *name);
+};
+
+#endif
+/*
+  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 :