From 2b6cb317db1e64017036bb0f7d35ee940d6133ef Mon Sep 17 00:00:00 2001
From: p01 <p01@opera.com>
Date: Mon, 10 Mar 2014 14:58:32 +0100
Subject: [PATCH] Optmized decodeRefinement, moving the prediction error
 outside the inner loop

There is no need to slow down the inner loop with a test for ltp as it can only
change if prediction is true in which case it only changes in the outer loop.
---
 src/core/jbig2.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/core/jbig2.js b/src/core/jbig2.js
index 0b9a1546e..23d4bd54b 100755
--- a/src/core/jbig2.js
+++ b/src/core/jbig2.js
@@ -376,13 +376,13 @@ var Jbig2Image = (function Jbig2ImageClosure() {
       if (prediction) {
         var sltp = decoder.readBit(contexts, pseudoPixelContext);
         ltp ^= sltp;
+        if (ltp) {
+          error('JBIG2 error: prediction is not supported');
+        }
       }
       var row = new Uint8Array(width);
       bitmap.push(row);
       for (var j = 0; j < width; j++) {
-        if (ltp) {
-          error('JBIG2 error: prediction is not supported');
-        }
 
         var contextLabel = 0;
         for (var k = 0; k < codingTemplateLength; k++) {