From a3d5a424ddc77c152b0c3e5b9b6cf790109de0db Mon Sep 17 00:00:00 2001
From: lisyarus <lisyarus@gmail.com>
Date: Mon, 16 May 2022 23:25:34 +0300
Subject: [PATCH] Add sRGB <-> linear conversion for pixmaps

---
 libs/gfx/include/psemek/gfx/pixmap.hpp | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/libs/gfx/include/psemek/gfx/pixmap.hpp b/libs/gfx/include/psemek/gfx/pixmap.hpp
index 788cb429..1a1e9b56 100644
--- a/libs/gfx/include/psemek/gfx/pixmap.hpp
+++ b/libs/gfx/include/psemek/gfx/pixmap.hpp
@@ -27,4 +27,18 @@ namespace psemek::gfx
 	pixmap_rgba read_png(io::istream && is);
 	pixmap_monochrome read_png_monochrome(io::istream && is);
 
+	template <typename Pixel, std::size_t N>
+	auto to_srgb(util::array<Pixel, N> pm, float g = 1.f / 2.2f)
+	{
+		for (auto & c : pm)
+			c = to_srgb(c, g);
+		return pm;
+	}
+
+	template <typename Pixel, std::size_t N>
+	auto to_linear(util::array<Pixel, N> pm, float g = 1.f / 2.2f)
+	{
+		return to_srgb(std::move(pm), 1.f / g);
+	}
+
 }