Bug 19665 - Full Page zoom renders incorrectly.
Summary: Full Page zoom renders incorrectly.
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: New Bugs (show other bugs)
Version: 528+ (Nightly build)
Hardware: Macintosh OS X 10.5
: P2 Normal
Assignee: Nobody
URL: http://forums.macrumors.com/subscript...
Keywords:
Depends on:
Blocks:
 
Reported: 2008-06-18 19:09 PDT by Alan Ross
Modified: 2009-07-06 08:51 PDT (History)
1 user (show)

See Also:


Attachments
Screen shot showing zoom rendering error when zoomed twice. (296.24 KB, image/png)
2008-06-18 19:11 PDT, Alan Ross
no flags Details

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Description Alan Ross 2008-06-18 19:09:25 PDT
This is the link to the "View All Subscribed Threads" in the MacRumors forum control panel.

When this page is zoomed twice a shaded field of a table is shown with multiple vertical lines across the entire field.  I have screen shots, but I don't know how to post them.  E-mail me at alan@netross.com if you want me to send them somewhere.

This was in build 34604...

This is a reproducible error...
Comment 1 Alan Ross 2008-06-18 19:11:31 PDT
Created attachment 21829 [details]
Screen shot showing zoom rendering error when zoomed twice.

THis screen shot shows the vertical lines that appear when the screen is zoomed twice...
Comment 2 eddie svärd 2009-06-10 03:26:32 PDT
Another, similar error, produced by the full page zoom as this are the misaligned elemented. Once the lines was fixed, another error with misaligned elements appeared. This has been the case since last year, and the bug survived through the Safari 4 developer build and now even public release. 

Same error applies to the beta, dev. and normal releases of Google Chrome!

http://pici.se/pictures/LafJVlhHB.jpg (example of the bug!)
Comment 3 eddie svärd 2009-06-10 03:32:08 PDT
Another example from the same page (www.apple.com) where there is clearly something oddly disturbing with the full page zoom feature and how it slightly misaligns the graphics. This also goes for the Acid 3 test (acid3.acidtests.org), which fails, when zoomed to another size than 100%!

http://pici.se/pictures/IFUyHFIho.jpg

http://pici.se/pictures/plWrgwbys.jpg

 

Comment 4 eddie svärd 2009-06-10 07:18:36 PDT
Text does not seem to be able to "shrink" accordingly to graphics on pages. Here is a rather straightforward screenshot of the problem where the bottom textrows loose all their proper formatting due the font does not seem to be able to shrink beyond a certain point.

http://pici.se/pictures/dzpHRVvHZ.jpg

Also text and images does not seem to adjust properly on zoom. Check the malplaced elements of this example that is based upon a centered page. (or try it yourselves with zooming/shrinking at: http://dromaeo.com/ ). This cannot be the standard behaviour of a zoom, where it is clearly reformatting the page design, rather than doing it's job (unlike Firefox, which actually does zoom properly, although extremely slow!)

http://pici.se/pictures/XbNxfJYpz.jpg

Examples taken from a Windows Xp sp 3, pc-computer.
Comment 5 eddie svärd 2009-07-06 08:51:01 PDT
I found this little webpage which is a easy way to check whether or not the full page zoom works proper or not. 

http://asymptote1.elnafrederick.computersclub.org/

A proper zoomer would create a evenly pattern over the screen, but clearly webkit renders faulty and therefor odd lines appear in some of the zoom steps  (the pattern is made up by small dots, which should create a stripe-like pattern similar to a table cloth when zoomed/shrinked). 

Compare results with Opera 10, Firefox 3.5 and notice the difference.