From bed384db6a56bcf28773098fffe91282d13bf632 Mon Sep 17 00:00:00 2001
From: Ryan Oldenburg <guzba8@gmail.com>
Date: Thu, 3 Dec 2020 20:21:15 -0600
Subject: [PATCH] add links to blend formula sources

---
 src/pixie/blends.nim | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/pixie/blends.nim b/src/pixie/blends.nim
index 15a296b..3ac932f 100644
--- a/src/pixie/blends.nim
+++ b/src/pixie/blends.nim
@@ -1,6 +1,9 @@
 ## Blending modes.
 import chroma, math, algorithm
 
+# See https://www.w3.org/TR/compositing-1/
+# See https://www.khronos.org/registry/OpenGL/extensions/KHR/KHR_blend_equation_advanced.txt
+
 type BlendMode* = enum
   bmNormal
   bmDarken