[CREATE] create resources, OpenRaster and tiled layers

[Boudewijn Rempt]

Hi,

Both MyPaint and Krita 
(http://www.valdyas.org/fading/index.cgi/hacking/krita/background.html) have 
the concept of a "background" image -- a pattern that is tiled behind the 
actual layers, for instance to show something that looks like paper when 
sketching.

Ideally, we'd be able to interchange images that contain such a background in 
OpenRaster. MyPaint saves its background as a layer and has some code to 
detect that the layer is actually a background layer with a pattern, but also 
saves a filled png of the size of the image.

I think it would be generally useful to be able to save layers that have tiled 
contents, and that it would also be nice to have an explicit tag that declares 
such a layer to be a background.

About create resources: maybe we could define a new resource, backgrounds, 
that we can package with create and re-use across applications? Both Krita and 
MyPaint now use pngs's, but it would be nice to have a format where we can 
name, tag, categorize and so on.
-- 
Boudewijn Rempt | http://www.valdyas.org