W3C home > Mailing lists > Public > www-style@w3.org > October 2010

Re: [css-device-adaptation] New draft

From: Kenneth Rohde Christiansen <kenneth.christiansen@gmail.com>
Date: Tue, 19 Oct 2010 17:50:32 -0300
Message-ID: <AANLkTikQKJaYvmgFCLE9t3etof3-1OGE1ogO_na1gYmU@mail.gmail.com>
To: Rune Lillesveen <rune@opera.com>
Cc: www-style@w3.org, Grace Kloba <klobag@gmail.com>
Exactly, but if I do not add a 1.5 scale on a device having 480 pixels in
the width, instead of 320, the pages designed with the iphone in mind will
have way to small buttons etc. That is why the Android device and Firefox
Mobile on the N900 scales every page with viewport meta tags with additional
1.5.

It is basically a legacy issue, due to the fact that sites *do not* consult
the dpi using the media feature. It seems that the targetDensityDpi was
added to avoid doing this always on higher dpi devices.

Kenneth

On Tue, Oct 19, 2010 at 5:42 PM, Rune Lillesveen <rune@opera.com> wrote:

> On Tue, 19 Oct 2010 15:28:36 +0200, Kenneth Rohde Christiansen <
> kenneth.christiansen@gmail.com> wrote:
>
>  I think the most important is that you might want to import another css
>> style when the device has a higher dpi, and keep zoom at 1.0.
>>
>
> Selecting different css based on device dpi is already supported with the
> resolution media feature in Media Queries.
>
>
>  It is more a legacy thing, as most mobile web app widgets are developed
>> with
>> the iPhone in mind, and they thus become too small on a device with a
>> higher
>> DPI. People have worked around with that by adjusting the zoom factor
>> (multiplying with a dpi factor) and the targetDensityDpi was introduced so
>> that sites could actually make use of the better dpi and ignore the dpi
>> adjustment factor.
>>
>
> I don't buy the different-dpi-than-iPhone argument. Content designed for
> 320x480 iPhones works well on 640x960 iPhones even though the 640x960
> iPhones have doubled the dpi. It should of course be noted that "luckily"
> the CSS pixel is a whole number of device pixels (not 1.5) and the
> width/height in CSS pixels ends up to be the same on both types of devices,
> but I'd expect a different width and/or height to be more of a problem for
> content designed for iPhone than different physical resolution. Unless the
> CSS pixels aren't scaled to a reasonable amount of physical pixels, which
> would be a UA issue.
>
>
> --
> Rune Lillesveen
> Senior Core Developer / Architect
> Opera Software ASA
>
>


-- 
Kenneth Rohde Christiansen
Senior Engineer
Nokia Danmark A/S
Phone  +55 81 8895 6002 / E-mail kenneth.christiansen at gmail.com

http://codeposts.blogspot.com ﹆﹆﹆
Received on Tuesday, 19 October 2010 20:51:29 GMT

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