[whatwg] to use pixels a DPI should be defined in hader of each page

Ian Hickson ian at hixie.ch
Tue Jul 22 02:24:13 PDT 2008

On Tue, 22 Jul 2008, Shimon Doodkin Support wrote:
> in now days we have different sizes of displays some of them huge with 
> low resolution and some of them normal but with very tiny dots. usually 
> the DPI of the development machine is matching the dpi of the VIEWER but 
> sometimes it doesn't when progress comes and new displays with higher 
> DPI are manufactured no one buy them because all the text will be very 
> small and unreadable.

The CSS spec defines the "pixel" as a nominal 96dpi relative unit, to 
avoid this very problem. HTML5 uses "CSS pixels" whenever discussing 
dimensions. <canvas> supports higher resolution backing stores.

This as far as I can tell HTML5 already deals with this.

Ian Hickson               U+1047E                )\._.,--....,'``.    fL
http://ln.hixie.ch/       U+263A                /,   _.. \   _\  ;`._ ,.
Things that are impossible just take longer.   `._.-(,_..'--(,_..'`-.;.'

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