diff --git a/libs/pcg/include/psemek/pcg/sample.hpp b/libs/pcg/include/psemek/pcg/sample.hpp
index 9443c155..66940ad8 100644
--- a/libs/pcg/include/psemek/pcg/sample.hpp
+++ b/libs/pcg/include/psemek/pcg/sample.hpp
@@ -5,6 +5,21 @@
 namespace psemek::pcg
 {
 
+	template <typename Gen, typename R>
+	void sample(Gen && gen, gfx::basic_pixmap<R> & result)
+	{
+		for (std::size_t j = 0; j < result.height(); ++j)
+		{
+			for (std::size_t i = 0; i < result.width(); ++i)
+			{
+				float ti = (i + 0.5f) / result.width();
+				float tj = (j + 0.5f) / result.height();
+
+				result(i, j) = gen(ti, tj);
+			}
+		}
+	}
+
 	template <typename Gen>
 	auto sample(Gen && gen, std::size_t width, std::size_t height)
 	{
@@ -12,18 +27,9 @@ namespace psemek::pcg
 
 		gfx::basic_pixmap<R> result({width, height});
 
-		for (std::size_t j = 0; j < height; ++j)
-		{
-			for (std::size_t i = 0; i < width; ++i)
-			{
-				float ti = (i + 0.5f) / width;
-				float tj = (j + 0.5f) / height;
-
-				result(i, j) = gen(ti, tj);
-			}
-		}
-
+		sample(std::forward<Gen>(gen), result);
 		return result;
 	}
 
+
 }