From 049c1a536c295cc85c0e3e42721cd3e4c382fe00 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?kleines=20Filmr=C3=B6llchen?= <filmroellchen@serenityos.org>
Date: Wed, 17 Aug 2022 18:04:08 +0200
Subject: [PATCH] LibGfx: Add saturation modification functions to Color

This operates via the HSV color space; I'm not 100% sure whether the
conversions are lossless.
---
 Userland/Libraries/LibGfx/Color.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Userland/Libraries/LibGfx/Color.h b/Userland/Libraries/LibGfx/Color.h
index 4277089712..941bc2dd7c 100644
--- a/Userland/Libraries/LibGfx/Color.h
+++ b/Userland/Libraries/LibGfx/Color.h
@@ -313,6 +313,15 @@ public:
     Vector<Color> shades(u32 steps, float max = 1.f) const;
     Vector<Color> tints(u32 steps, float max = 1.f) const;
 
+    constexpr Color saturated_to(float saturation) const
+    {
+        auto hsv = to_hsv();
+        auto alpha = this->alpha();
+        auto color = Color::from_hsv(hsv.hue, static_cast<double>(saturation), hsv.value);
+        color.set_alpha(alpha);
+        return color;
+    }
+
     constexpr Color inverted() const
     {
         return Color(~red(), ~green(), ~blue(), alpha());