From 4233b69ecf6811181d0dd5d746cfeca8bdd57432 Mon Sep 17 00:00:00 2001
From: Matthew Olsson <matthewcolsson@gmail.com>
Date: Tue, 20 Apr 2021 12:39:48 -0700
Subject: [PATCH] Color: Add interpolate method

---
 Userland/Libraries/LibGfx/Color.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Userland/Libraries/LibGfx/Color.h b/Userland/Libraries/LibGfx/Color.h
index f4045fff99..f3f2f98a09 100644
--- a/Userland/Libraries/LibGfx/Color.h
+++ b/Userland/Libraries/LibGfx/Color.h
@@ -12,6 +12,7 @@
 #include <AK/SIMD.h>
 #include <AK/StdLibExtras.h>
 #include <LibIPC/Forward.h>
+#include <math.h>
 
 namespace Gfx {
 
@@ -139,6 +140,15 @@ public:
 #endif
     }
 
+    constexpr Color interpolate(const Color& other, float weight) const
+    {
+        u8 r = red() + roundf(static_cast<float>(other.red() - red()) * weight);
+        u8 g = green() + roundf(static_cast<float>(other.green() - green()) * weight);
+        u8 b = blue() + roundf(static_cast<float>(other.blue() - blue()) * weight);
+        u8 a = alpha() + roundf(static_cast<float>(other.alpha() - alpha()) * weight);
+        return Color(r, g, b, a);
+    }
+
     constexpr Color multiply(const Color& other) const
     {
         return Color(