Add vecr::blur

libs/vecr/include/psemek/vecr/blur.hpp

@@ -0,0 +1,31 @@
+#pragma once
+
+#include <psemek/vecr/sdf.hpp>
+#include <psemek/geom/point.hpp>
+#include <psemek/geom/box.hpp>
+
+namespace psemek::vecr
+{
+
+	template <typename Shape>
+	struct blur
+	{
+		Shape shape;
+		float factor;
+	};
+
+	template <typename Shape>
+	sdf_sample sdf(blur<Shape> const & s, geom::point<float, 2> const & p)
+	{
+		auto result = sdf(s.shape, p);
+		result.value /= s.factor;
+		return result;
+	}
+
+	template <typename Shape>
+	geom::box<float, 2> bbox(blur<Shape> const & s)
+	{
+		return bbox(s.shape);
+	}
+
+}