407360 - Images with transparent backgrounds are garbled when printed

Status: RESOLVED FIXED

(Core :: Graphics, defect, P2)

Description

[Bill Gianopoulos [:WG9s]]

Attachment: image that shows the issue when printed

Since the latest Cairo upgrade, images with transparent backgrounds no longer print correctly under Linux.  Print preview displays correctly.

The problem does not seem to be present under Windows.

Comment 1

[Bill Gianopoulos [:WG9s]]

Attachment: how this looks when printed

Comment 2

[Daniel Holbert [:dholbert]]

Attachment: print-to-file results

If I tick "Print to file" in the print dialog, this is what I get in FF3.

Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9b2pre) Gecko/2007121008 Minefield/3.0b2pre

In FF2, I get a nice postscript printout.

Comment 3

[Daniel Holbert [:dholbert]]

Attachment: screenshot of print-to-file

Comment 4

[Mats Palmgren (inactive)]

Attachment: Image #2

I'm guessing I'm seeing the same bug with this image.

Comment 5

[Mats Palmgren (inactive)]

Attachment: Screenshot of Image #2

This is what it looks like when printed.  Note that it displays correctly
in Print Preview.  The problem only occurs on Linux.

Comment 6

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

Fixed upstream:

commit c621d8d7191bfa8c1bca533bf9d53d514d01f529
Author: Vladimir Vukicevic <[e-mail]>
Date:   Fri Jan 25 15:01:44 2008 -0800

    [ps] Pad image mask lines out to full lines
    
    The PostScript backend was generating image masks with packed mask
    bits, when PS seems to expect each line of the mask to be padded out
    to 8 bytes.
    
    Ref: https://bugzilla.mozilla.org/show_bug.cgi?id=407360