From f58aa2a23be3a571be879c97b8d7e4bb214ca051 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=BCrg=20Lehni?= <juerg@scratchdisk.com>
Date: Wed, 1 Jun 2011 17:11:06 +0100
Subject: [PATCH] Add comment about overlay mode being the reverse of
hard-light.
---
src/util/BlendMode.js | 1 +
1 file changed, 1 insertion(+)
diff --git a/src/util/BlendMode.js b/src/util/BlendMode.js
index b1b20a02..b5fc7d11 100644
--- a/src/util/BlendMode.js
+++ b/src/util/BlendMode.js
@@ -73,6 +73,7 @@ var BlendMode = {
},
overlay: function(i) {
+ // = Reverse of hard-light
// Correct for 100% opacity case; colors get clipped as opacity falls
dst[i] = dRA <= 0.5 ? (2 * src[i] * dRA / dA) : 255 - (2 - 2 * dRA / dA) * (255 - src[i]);
dst[i + 1] = dGA <= 0.5 ? (2 * src[i + 1] * dGA / dA) : 255 - (2 - 2 * dGA / dA) * (255 - src[i + 1]);