From c9510db551893775d3233340dd114d971e24323a Mon Sep 17 00:00:00 2001
From: Héctor Ramón Jiménez <hector0193@gmail.com>
Date: Mon, 7 Oct 2019 03:56:16 +0200
Subject: Render colored quads

---
 core/src/color.rs | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'core')

diff --git a/core/src/color.rs b/core/src/color.rs
index 5cc3a084..2b64c78d 100644
--- a/core/src/color.rs
+++ b/core/src/color.rs
@@ -16,4 +16,23 @@ impl Color {
         b: 0.0,
         a: 1.0,
     };
+
+    pub fn into_linear(self) -> [f32; 4] {
+        // As described in:
+        // https://en.wikipedia.org/wiki/SRGB#The_reverse_transformation
+        fn linear_component(u: f32) -> f32 {
+            if u < 0.04045 {
+                u / 12.92
+            } else {
+                ((u + 0.055) / 1.055).powf(2.4)
+            }
+        }
+
+        [
+            linear_component(self.r),
+            linear_component(self.g),
+            linear_component(self.b),
+            self.a,
+        ]
+    }
 }
-- 
cgit