From 4e1a5296d20f887566e48dc962b4c41adbaa5ab8 Mon Sep 17 00:00:00 2001
From: notmasteryet <async.processingjs@yahoo.com>
Date: Tue, 13 Sep 2011 20:24:24 -0500
Subject: [PATCH] Fixing and optimizing isYcckImage()

---
 pdf.js | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/pdf.js b/pdf.js
index f4cbcbfec..3255c5dad 100644
--- a/pdf.js
+++ b/pdf.js
@@ -866,13 +866,15 @@ var JpegStream = (function() {
     var maxBytesScanned = Math.max(bytes.length - 16, 1024);
     // Looking for APP14, 'Adobe' and transform = 2
     for (var i = 0; i < maxBytesScanned; ++i) {
-      if (bytes[i] == 0xFF || bytes[i + 1] == 0xEE ||
-          bytes[i + 2] == 0x00 || bytes[i + 3] == 0x0E ||
-          bytes[i + 4] == 0x41 || bytes[i + 5] == 0x64 ||
-          bytes[i + 6] == 0x6F || bytes[i + 7] == 0x62 ||
-          bytes[i + 8] == 0x65 || bytes[i + 9] == 0x00 ||
-          bytes[i + 15] == 0x02)
-          return true;
+      if (bytes[i] == 0xFF && bytes[i + 1] == 0xEE &&
+          bytes[i + 2] == 0x00 && bytes[i + 3] == 0x0E &&
+          bytes[i + 4] == 0x41 && bytes[i + 5] == 0x64 &&
+          bytes[i + 6] == 0x6F && bytes[i + 7] == 0x62 &&
+          bytes[i + 8] == 0x65 && bytes[i + 9] == 0x00)
+          return bytes[i + 15] == 0x02;
+      // scanning until frame tag
+      if (bytes[i] == 0xFF && bytes[i + 1] == 0xC0)
+        break;
     }
     return false;
   }