From a32116ce4a9409d2e99ec7ea3f48993e35463659 Mon Sep 17 00:00:00 2001
From: jst <janschlicht@gmail.com>
Date: Tue, 11 Dec 2012 20:35:02 +0100
Subject: [PATCH] Add documentation

---
 converter.go | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/converter.go b/converter.go
index bf610c3..c301fee 100644
--- a/converter.go
+++ b/converter.go
@@ -39,8 +39,9 @@ func replicateBorder(x, y int, rect image.Rectangle) (xx, yy int) {
 	return
 }
 
-// converter allows to retrieve
-// a colorArray for points of an image.
+// converter allows to retrieve a colorArray for points of an image.
+// the idea is to speed up computation by providing optimized implementations
+// for different image types instead of relying on image.Image.At().
 type converter interface {
 	at(x, y int) colorArray
 }