[Bug 209953] [NEW] Large image is corrupted when zoomed out

[Alex Fraser]

Public bug reported:

Binary package hint: firefox-3.0

A large png is displayed corrupted in a small window.

Steps to reproduce:
 1. Make your browser window small, E.G. 800x600.
 2. Load this image (1680x1050): http://launchpadlibrarian.net/11474451/Screenshot-1.png (screenshot from another bug report, not uploaded by me).

As the image streams in, it should be incrementally displayed and zoomed
to fit the window. The top may be displayed well, but then the lower-
half will appear garbled (using colours from the image, not random
ones). If the image is clicked on to zoom to full-size it renders
correctly. Zooming back out produces different corruption: the image
appears zoomed out and then shifted vertically to show only a lower
portion. Everything below that is rendered black.

Browsing in other tabs and then returning to the image may fix the
problem, but forcing a reload (shift-click on Reload button) shows the
image corrupted again.

Versions:
Ubuntu: 8.04
Firefox-3.0: 3.0~b4+nobinonly-0ubuntu1
libcairo2: 1.5.14-0ubuntu2
libgtk2.0-0: 2.12.9-2ubuntu2
libpng12-0: 1.2.15~beta5-3
libxrender1: 1:0.9.4-1

Non-free:
xorg-driver-fglrx: 1:7.1.0-8-3+2.6.24.11-12.31

Now that I've written all that I can't reproduce the problem! I'll try
in a new instance of Firefox.

** Affects: firefox-3.0 (Ubuntu)
     Importance: Undecided
         Status: New

-- 
Large image is corrupted when zoomed out
https://bugs.launchpad.net/bugs/209953
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