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RE: [CSS3-MQ] Resolution

From: Grant, Melinda <melinda.grant@hp.com>
Date: Tue, 22 Aug 2006 21:14:11 -0500
Message-ID: <78A3602ADF54BA4EAB53F378BF55588B0C50BF@G3W0067.americas.hpqcorp.net>
To: Christoph Päper <christoph.paeper@crissov.de>, <www-style@w3.org>

Depending on the intended use model of the resolution feature, additional flexibility might also be desirable to allow differing black and color resolutions.  Many modern printers use a higher resolution for black pixels than for color pixels.

A more fundamental issue is that I believe this feature is intended to allow selection of presentation or content based on the achievable visual acuity of the display surface.  Resolution is a simplistic but very unreliable metric in this regard.  In today's color inkjet printers, for example, achievable print quality may be much more a function of the number of pens (ink colors) and the ability to modulate dot size than a function of resolution.

But my sense is that this feature is meant as a rather broad brushstroke, in which case resolution may be appropriate.


-----Original Message-----
From: www-style-request@w3.org [mailto:www-style-request@w3.org] On Behalf Of Christoph Päper
Sent: Tuesday, August 22, 2006 4:59 AM
To: www-style@w3.org
Subject: [CSS3-MQ] Resolution

CSS3 Media Queries CR introduces two new units (7.), |dpi| and | 
dpcm|, solely for its |resolution| media feature (6.9.). Could this
be changed or at least be amended to also allow standard CSS absolute length units (e.g. |mm|)? The values using |in| and |cm| would of course be the respective reciprocals of the current ones and described the size of one point^W pixel. If a new unit was needed at all this would be |um|, the ASCII representation of 'µm' for micrometre, approved by ISO (31?).
It might also be a good idea to make this media feature a shorthand for horizontal and vertical resolution for which separate features might be added later.
Received on Wednesday, 23 August 2006 02:14:36 UTC

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