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Re: [css-masking] 'mask' with resource and image references (was: [css4-images] support for SVG Paint Servers without element())

From: Robert O'Callahan <robert@ocallahan.org>
Date: Wed, 7 Nov 2012 08:35:24 +1300
Message-ID: <CAOp6jLahGyD8OdBpe4W1fkpo7hVb_1qtbe7TxH-O770OM4KVjg@mail.gmail.com>
To: Dirk Schulze <dschulze@adobe.com>
Cc: "Tab Atkins Jr." <jackalmage@gmail.com>, "www-style@w3.org list" <www-style@w3.org>
On Tue, Nov 6, 2012 at 2:56 PM, Dirk Schulze <dschulze@adobe.com> wrote:

> Example:
> mask: url(image.svg#id);
> The URL needs to be checked if valid. In this case it needs o be checked
> if it is an SVG image. If it is, use SVG masking (with <mask>).

Since the URL has a fragment, this will always be treated as an SVG mask
with an external resource document containing a <mask> element. There is no
need to determine whether the image is an SVG image.

Second example:
> mask: url(image.svg#id), url(image2.svg#id);
> Both references should be treated as SVG resources (references to SVG
> mask). But in this case the construct is parsed as an shorthand for
> 'mask-image'. All that makes parsing more difficult.

Why? The value of mask-image is "url(image.svg#id), url(image2.svg#id)".
Both are interpreted as references to SVG <mask> elements. There's no

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Received on Tuesday, 6 November 2012 19:35:53 UTC

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