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Re: [whatwg] [canvas] inner shadows

From: Glenn Maynard <glenn@zewt.org>
Date: Fri, 23 Nov 2012 17:47:06 -0600
Message-ID: <CABirCh-2SVhtbV53Nvnk_thr9xEhLFZ1A=V1A_qNC6nYi-UStA@mail.gmail.com>
To: Rik Cabanier <cabanier@gmail.com>
Cc: Tyler Larson <talltyler@gmail.com>, Ian Hickson <ian@hixie.ch>, whatwg@whatwg.org
On Fri, Sep 21, 2012 at 7:49 PM, Rik Cabanier <cabanier@gmail.com> wrote:

> With both types of shadow, you take the shape of the element and calculate
> the blur image.
> With an outer shadow, you take the result of the blur and composite it.
> After this, you composite the original shape.
> With an inner shadow, you draw the shape first followed by the blur image.
> Importantly, the blur image also needs to clipped by the shape before it is
> composited.

Also, the blurred image's alpha is inverted.

Glenn Maynard
Received on Saturday, 24 November 2012 01:27:44 UTC

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