From 960f3c4f36ab20c29d7575fbd5f51615ec1a2b05 Mon Sep 17 00:00:00 2001
From: kkapsner <github@mail.kkapsner.de>
Date: Wed, 18 Jan 2017 08:46:45 +0100
Subject: [PATCH] Only alter last bit also in non persistent rng mode.

Fixes #99.
---
 lib/modifiedAPI.js    |  2 +-
 lib/randomSupplies.js | 25 +++----------------------
 2 files changed, 4 insertions(+), 23 deletions(-)

diff --git a/lib/modifiedAPI.js b/lib/modifiedAPI.js
index 3f74878..530a8d8 100644
--- a/lib/modifiedAPI.js
+++ b/lib/modifiedAPI.js
@@ -46,7 +46,7 @@
 		var l = desc.length;
 		var rng = randomSupply.getRng(l, window);
 		
-		for (var i = 0; i < l; i += 10){
+		for (var i = 0; i < l; i += 1){
 			desc[i] = rng(source[i], i);
 		}
 		var canvas = original.cloneNode(true);
diff --git a/lib/randomSupplies.js b/lib/randomSupplies.js
index 83552b4..0058885 100644
--- a/lib/randomSupplies.js
+++ b/lib/randomSupplies.js
@@ -28,7 +28,7 @@
 				// extract the bit
 				var bit = (bitSet[index] >>> bitIndex) & 0x01;
 				
-				// XOR the bit the the value to alter the last bit of it... or not
+				// XOR the bit and the value to alter the last bit of it... or not
 				return value ^ bit;
 			};
 		}
@@ -52,27 +52,8 @@
 				var rnd = randomNumbers[randomI];
 				randomI += 1;
 				
-				// do not alter the most significant bit that is set and
-				// the bit after it, to not disturb the image too much.
-				if (value >= 0x80){
-					value = value ^ (rnd & 0x1F);
-				}
-				else if (value >= 0x40){
-					value = value ^ (rnd & 0x0F);
-				}
-				else if (value >= 0x20){
-					value = value ^ (rnd & 0x07);
-				}
-				else if (value >= 0x10){
-					value = value ^ (rnd & 0x03);
-				}
-				else if (value >= 0x08){
-					value = value ^ (rnd & 0x01);
-				}
-				// else if (value >= 0x04){
-					// value = value ^ (rnd * 0x00);
-				// }
-				return value;
+				// XOR the last bit to alter it... or not
+				return value ^ (rnd & 0x01);
 			};
 		}
 	};