845783 - Broken pdf.js rendering (image transparency)

Status: VERIFIED FIXED

(Firefox :: PDF Viewer, defect)

Description

[Martin Koegler]

Attachment: Testcase.pdf

The attached PDF contains transparent graphics. 

pdf.js (released Firefox 19.0) renders the images with a random background color (in contrast to Acrobat Reader).

Comment 1

[Matthias Versen [:Matti]]

Looks like a dupe of bug 843321

Comment 2

[Martin Koegler]

In my option, it is a different issue. 
In bug 843321, the text is displayed opaque instead of being semitransparent. 
In my testcase, the viewer replaces the transparent background with a different, random color at each (re-)load. It looks like it is related to the security features of the PDF document.

Comment 3

[Martin Koegler]

I think, that I found the bug in the pdf.js sources:
diff --git a/src/parser.js b/src/parser.js
index 6b09686..570203f 100644
--- a/src/parser.js
+++ b/src/parser.js
@@ -60,7 +60,7 @@ var Parser = (function ParserClosure() {
         this.shift();
         var array = [];
         while (!isCmd(this.buf1, ']') && !isEOF(this.buf1))
-          array.push(this.getObj());
+          array.push(this.getObj(cipherTransform));
         if (isEOF(this.buf1))
           error('End of file inside array');
         this.shift();

Comment 4

[Martin Koegler]

https://github.com/mozilla/pdf.js/commit/69353e363d8285639d916011aca0d18ff0c07499

Comment 5

[Ryan VanderMeulen [:RyanVM]]

Fixed by bug 848641.
https://hg.mozilla.org/mozilla-central/rev/8c5d7b67d20d

Comment 6

[Mihaela Velimiroviciu (:mihaelav)]

Mozilla/5.0 (Windows NT 6.1; rv:22.0) Gecko/20130312 Firefox/22.0, Build ID: 20130312031046

Verified the fix on latest Nightly.