[CREATE] OpenRaster fallbacks (proposal/RFC)
cberger at cberger.net
Tue Aug 18 09:10:42 PDT 2009
On Sunday 09 August 2009, Martin Renold wrote:
> New pixel formats:
> As it is now, we need to use different attributes to save the "legacy" and
> the new file format side-by-side in a compatible way. For example:
> <layer src="data/layer001.png" src_16bit="data/layer001_16bit.png"/>
> and also for fallbacks:
> <cache src="caches/checkerboard.png" src_float='caches/checkerboard.dat'/>
> Essentially, the specification needs to be updated to state that src=...
> attributes can only point to 8bpc PNG images, and all other formats need
> other attributes. Ugly? Acceptable? Alternatives?
I think it would work with fallback
<fallback src="data/layer001.png" />
> Layer modes:
> Would a compositing mode other than OVER be implemented as an <effect> in
> OpenRaster? Or would the mode be part of the <layer> tag, which then can
> also have a fallback? If so, can a <stack> tag also have a compositing
I am more for the <layer> tag. And defaulting to OVER.
> Filter/Renderer variants:
> Implementation might like to have a way to decide whether they can render
> something without fallback. This can be solved with version=...
I don't follow you, you mean different version of the filter ?
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