[whatwg] Media queries, viewport dimensions, srcset and picture

[Markus Ernst]

Am 06.06.2012 14:36 schrieb Henri Sivonen:
> On Wed, May 23, 2012 at 6:21 PM, Florian Rivoal<florianr at opera.com>  wrote:
>> 1) simplyfy srcset to only accept the *x qualifier
>
> Is there a good reason to believe that * will be something other than
> a power of two?
>
> That is, could we just optimize the *x syntax away and specify that
> the first option is 1x, the second is 2x, the third is 4x, etc.?

Explicitly specifying the * in *x allows more flexibility in the future 
for cases such as:
- If sometime most displays will have 2x or higher resolutions, authors 
might want to set 1x versions aside.
- If 3x or whatever displays should occur, the spec should be suitable 
for them, too.
- Some UAs might decide to progressively load sources in order to 
emulate what we know from interlaced GIFs. Authors could for this 
purpose add 0.5x and even 0.25x versions.