[CREATE] OpenRaster and filters

[Jon Phillips]

Cyrille, whats the latest status of your big push?

Jon

On Wed, 2008-06-11 at 21:20 +0200, Cyrille Berger wrote:
> Hello,
> 
> In the following monthes I am going to try to push OpenRaster forward, and 
> from time to time will raise on the list one of the issue of [1] and ask for 
> opinions on how to solve the issue, until we have been able to find a 
> concensus on the subject.
> 
> The most urgent issue (even if it appears at the bottom of [1]) to solve is 
> how to serialize filters:
> 
> We have three ways (at least) of doing this:
> 1) <filter name="standard:blur" type="standard:gaussianblur">
>    <params>
>      <param name="radius">10</param>
>    </params>
>  </filter>
> 
> 2) <filter:standard:blur radius="10" />
> 
> 3) <filter:standard:blur>
>   <radius>10</radius>
>  </filter:standard:blur>
> 
> The main weakness of 1) is that this doesn't allow DTD/RelaxNG checking and 
> validation, but it makes easier to extend since you don't have to write the 
> schema for your filter
> 
> While 2) and 3) have the advantage to allow DTD/RelaxNG validation, while 
> still allowing extensability. 2) is similar to the SVG syntax.
> 
> 3) and 1) have the advantage that you can easily pass more complex parameters 
> to the filter, for instance, the mask on a layer could be serialize as:
> 
> <filter:standard:mask>
>   <mask> <layer src="alphamask.png" /> </mask>
> </filter:standard:mask>
> 
> I would like to hear your opinions on the subject, as well as other 
> suggestions.
> 
> [1] http://create.freedesktop.org/wiki/index.php/OpenRaster/Open_for_comments
-- 
Jon Phillips
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