CCITTFaxStream problem when EndOfBlock is false

mozilla · Sep 19, 2017 · 3d99b8d · 3d99b8d
1 parent 9c2e9da
commit 3d99b8d
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Showing 4 changed files with 13 additions and 2 deletions.
diff --git a/src/core/stream.js b/src/core/stream.js
@@ -1787,6 +1787,7 @@ var CCITTFaxStream = (function CCITTFaxStreamClosure() {
     this.inputBits = 0;
     this.inputBuf = 0;
     this.outputBits = 0;
+    this.rowsDone = false;
 
     var code1;
     while ((code1 = this.lookBits(12)) === 0) {
@@ -1872,6 +1873,9 @@ var CCITTFaxStream = (function CCITTFaxStreamClosure() {
     var refPos, blackPixels, bits, i;
 
     if (this.outputBits === 0) {
+      if (this.rowsDone) {
+        this.eof = true;
+      }
       if (this.eof) {
         return null;
       }
@@ -2052,7 +2056,7 @@ var CCITTFaxStream = (function CCITTFaxStreamClosure() {
       }
 
       if (!this.eoblock && this.row === this.rows - 1) {
-        this.eof = true;
+        this.rowsDone = true;
       } else {
         code1 = this.lookBits(12);
         if (this.eoline) {
@@ -2074,7 +2078,7 @@ var CCITTFaxStream = (function CCITTFaxStreamClosure() {
         }
       }
 
-      if (!this.eof && this.encoding > 0) {
+      if (!this.eof && this.encoding > 0 && !this.rowsDone) {
         this.nextLine2D = !this.lookBits(1);
         this.eatBits(1);
       }

diff --git a/test/pdfs/.gitignore b/test/pdfs/.gitignore
@@ -297,3 +297,4 @@
 !issue8097_reduced.pdf
 !transparent.pdf
 !xobject-image.pdf
+!ccitt_EndOfBlock_false.pdf
diff --git a/test/pdfs/ccitt_EndOfBlock_false.pdf b/test/pdfs/ccitt_EndOfBlock_false.pdf
diff --git a/test/test_manifest.json b/test/test_manifest.json
@@ -3693,5 +3693,11 @@
        "rounds": 1,
        "link": true,
        "type": "eq"
+    },
+    {  "id": "ccitt_EndOfBlock_false",
+       "file": "pdfs/ccitt_EndOfBlock_false.pdf",
+       "md5": "ce718efe601cd7491dd00651b4790329",
+       "rounds": 1,
+       "type": "eq"
     }
 ]