Re: [css-images][css-compositing] Blurring an element’s backdrop

On Wed, Sep 18, 2013 at 8:15 PM, Brad Kemper <brad.kemper@gmail.com> wrote:

>
> On Sep 18, 2013, at 4:33 PM, Rik Cabanier wrote:
>
> Blurring of the backdrop is not quite the same as a CSS image.
> You typically only want to blur where you're actually painting. For
> instance, if you draw large text or an SVG graphic, you only want to blur
> where the pixels of the text or graphic are drawn.
>
> I guess you could pull in the backdrop as a rectangular region of a
> certain size, but seems too primitive for CSS.
>
>
> The backdrop is whatever is behind the element, right? That can change,
> due to scrolling, resizing, dragging, animating, etc., and you'd want the
> blurring to continue to blur whatever is behind it.
>

Yes, since this is all declarative, the effect should look correct if the
content or its backdrop change. (Just like it should with blending)