Merge pull request #2021 from yurydelendik/issue-1877

Merges new jpgjs: fixes invalid JPEG marker.

external/jpgjs/LICENSE

@@ -1,24 +1,17 @@
 
-Copyright (C) 2011 by notmasteryet
+   Copyright (C) 2011 notmasteryet
 
-Contributors: Yury Delendik
+   Contributors: Yury Delendik <ydelendik@mozilla.com>
                  Brendan Dahl <bdahl@mozilla.com>
 
-Permission is hereby granted, free of charge, to any person obtaining
+   Licensed under the Apache License, Version 2.0 (the "License");
-a copy of this software and associated documentation files (the
+   you may not use this file except in compliance with the License.
-"Software"), to deal in the Software without restriction, including
+   You may obtain a copy of the License at
-without limitation the rights to use, copy, modify, merge, publish,
-distribute, sublicense, and/or sell copies of the Software, and to
-permit persons to whom the Software is furnished to do so, subject to
-the following conditions:
 
-The above copyright notice and this permission notice shall be
+       http://www.apache.org/licenses/LICENSE-2.0
-included in all copies or substantial portions of the Software.
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+   Unless required by applicable law or agreed to in writing, software
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+   distributed under the License is distributed on an "AS IS" BASIS,
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+   See the License for the specific language governing permissions and
-LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+   limitations under the License.
-OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

external/jpgjs/jpg.js

@@ -1,5 +1,20 @@
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- /
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/*
+   Copyright 2011 notmasteryet
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
 
 // - The JPEG specification can be found in the ITU CCITT Recommendation T.81
 //   (www.w3.org/Graphics/JPEG/itu-t81.pdf)
@@ -627,8 +642,9 @@ var JpegImage = (function jpegImage() {
             break;
 
           case 0xFFDB: // DQT (Define Quantization Tables)
-            var quantizationTableCount = Math.floor((readUint16() - 2) / 65);
+            var quantizationTablesLength = readUint16();
-            for (i = 0; i < quantizationTableCount; i++) {
+            var quantizationTablesEnd = quantizationTablesLength + offset - 2;
+            while (offset < quantizationTablesEnd) {
               var quantizationTableSpec = data[offset++];
               var tableData = new Int32Array(64);
               if ((quantizationTableSpec >> 4) === 0) { // 8 bit values
@@ -721,6 +737,13 @@ var JpegImage = (function jpegImage() {
             offset += processed;
             break;
           default:
+            if (data[offset - 3] == 0xFF &&
+                data[offset - 2] >= 0xC0 && data[offset - 2] <= 0xFE) {
+              // could be incorrect encoding -- last 0xFF byte of the previous
+              // block was eaten by the encoder
+              offset -= 3;
+              break;
+            }
             throw "unknown JPEG marker " + fileMarker.toString(16);
         }
         fileMarker = readUint16();