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Re: [css3-images] `image-resolution: span` and transformations.

From: Tab Atkins Jr. <jackalmage@gmail.com>
Date: Mon, 29 Jul 2013 13:56:22 -0700
Message-ID: <CAAWBYDAGxb=t9jjq3hXGJj0LjG8NSAgGKmuO7DAzjLA_Q1LYnA@mail.gmail.com>
To: Rik Cabanier <cabanier@gmail.com>
Cc: Simon Sapin <simon.sapin@exyr.org>, www-style list <www-style@w3.org>
On Mon, Jul 29, 2013 at 1:40 PM, Rik Cabanier <cabanier@gmail.com> wrote:
> Wouldn't this result in weird resizing behavior while zooming?
>
> For instance, you have a 96x96 pixel image that knows it 96dpi. By default,
> it will take up 96 CSS and device pixels on the screen.
> If you zoom by 10%, it will still take up 96 CSS pixels but 106 device
> pixels.
>
> Now what happens if you set the image style to:
>
> image-resolution: from-image snap;

The image's intrinsic size would change to approximately 87 CSS px
(that is, 96 device pixels at a screen resolution of 105.6dpi).

>> > This is a very confusing property. Shouldn't there be a reference to
>> > device
>> > pixel ratio?
>>
>> Maybe?  The relevant concepts are very ill-defined in the platform at
>> the moment (and this is a legacy property).
>
> I agree.
> What do you mean by 'legacy'? Did anyone implement this?

Yes, it's implemented by CSS based printers and printing programs.

~TJ
Received on Monday, 29 July 2013 20:57:09 UTC

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