From 39765c9d26ef0da042adca26f9bd9a119d0066d0 Mon Sep 17 00:00:00 2001
From: lisyarus <lisyarus@gmail.com>
Date: Sun, 13 Sep 2020 11:07:20 +0300
Subject: [PATCH] Add white noise pixmap generator

---
 libs/pcg/include/psemek/pcg/white.hpp | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 libs/pcg/include/psemek/pcg/white.hpp

diff --git a/libs/pcg/include/psemek/pcg/white.hpp b/libs/pcg/include/psemek/pcg/white.hpp
new file mode 100644
index 00000000..bc12aec1
--- /dev/null
+++ b/libs/pcg/include/psemek/pcg/white.hpp
@@ -0,0 +1,27 @@
+#pragma once
+
+#include <psemek/geom/interval.hpp>
+#include <psemek/gfx/pixmap.hpp>
+
+#include <random>
+
+namespace psemek::pcg
+{
+
+	template <typename T = float, typename RNG>
+	gfx::basic_pixmap<T> white(std::size_t width, std::size_t height, RNG && rng, geom::interval<T> const & range)
+	{
+		using dist = std::conditional_t<std::is_floating_point_v<T>, std::uniform_real_distribution<T>, std::uniform_int_distribution<T>>;
+
+		dist d{range.min, range.max};
+
+		gfx::basic_pixmap<T> result(width, height);
+
+		for (std::size_t x = 0; x < width; ++x)
+			for (std::size_t y = 0; y < height; ++y)
+				result(x, y) = d(rng);
+
+		return result;
+	}
+
+}