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RE: Browser zooms and testsuites

From: Sylvain Galineau <sylvaing@microsoft.com>
Date: Sun, 28 Oct 2012 17:18:11 +0000
To: François REMY <fremycompany_pub@yahoo.fr>, "www-style@w3.org" <www-style@w3.org>, "public-css-testsuite@w3.org" <public-css-testsuite@w3.org>
Message-ID: <3C4041FF83E1E04A986B6DC50F0178291BE63FE0@TK5EX14MBXC221.redmond.corp.microsoft.com>
[François REMY:]
> Hi all,
> This is just a remainder that some tests I wrote during Test The Web
> Forward work fine when running in 100% zoom but fails when the browser is
> set to other zooms values. This is because, sometimes, the browser uses
> real window/OS units instead of zoomed units, something which is causing
> issues.
> I think it may be important for browser implementers to test their browser
> in real "zoom conditions" and check that the result of the test is the
> same as what they would obtain by scaling down the image from the 'zoom-
> expanded' resolution (or, at least, by running the reference test in the
> same zoom conditions).
> Browser zoom is really useful on small devices (to adapt for a small
> screen a desktop site), and on hi-res desktop displays to accomodate small
> text and wasted space (some browsers have settings to load page zoomed-in
> by default in this case) so this is important to make sure there's no
> implementation bug due to zoom.
These may not always be bugs; optical zoom should not break a testcase but
there are different ways browser zoom pages which may impact a page or
Received on Sunday, 28 October 2012 17:18:58 UTC

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