733698 - Assign font property to canvas context inside hidden iframe fails

Status: RESOLVED DUPLICATE of bug 941146

(Core :: Graphics: Canvas2D, defect)

Description

[subzey]

Attachment: ZIP archive containing parent and inner pages

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:10.0.2) Gecko/20100101 Firefox/10.0.2
Build ID: 20120215223356

Steps to reproduce:

Set `font` property to canvas context on page that is located within iframe.
IFRAME object in parent document has style `display: none`.


Actual results:

An error.
Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIDOMCanvasRenderingContext2D.font]


Expected results:

Property should have been set without causing any errors

Comment 1

[subzey]

Attachment: Two HTML files to reproduce errors

This errors relates not only .font property but also .fillText(), .strokeText() and .measureText() methods.

Comment 2

[Alon Zakai (:azakai)]

Looks like this is breaking

https://www.dartlang.org/performance/

Clicking on the other tabs there does not show content. See

http://code.google.com/p/dart/issues/detail?id=10602

Comment 3

[[e-mail]]

Same on Linux with FF29 and FF32. Using canvas with text is not possible within an iframe.

Comment 4

[Peter J. Sloetjes]

This also occurs on Windows with my extension Extensor when an iframe that contains canvas elements is initially hidden. The behavior is correct after the iframe is shown.

Comment 5

[ainop]

Same for me: NS_ERROR_FAILURE. Firefox 37.0.2 on Mac OS 10.5.9.

Comment 6

[Manor Askenazi]

alex@ndre suggests this may be a duplicate of the following bug:
https://bugzilla.mozilla.org/show_bug.cgi?id=941146

Comment 7

[Boris Zbarsky [:bzbarsky]]

Dupping forward, since the other bug has more info about which code is involved.