[CREATE] Requirements on PNG data in OpenRaster files

[Boudewijn Rempt]

On Monday 09 April 2012 Apr, Andrew Chadwick wrote:
> It would be a good idea to place some limitations and requirements on
> PNG file data in OpenRaster files.
> 
> Proposal:
> http://www.freedesktop.org/wiki/Specifications/OpenRaster/Draft/PngDataRequirements
> 
> Could interested parties on this list please read the proposal and
> comment on the text here? Thanks.
> 
> 
> Quick summary:
> 
> * Recommend the PNG format for layer data. It's a good format for flat
> raster graphics, and permitting any format for use in layers will be
> problematic. Should I leave more room open for things like SVG layers?

In another version -- and when users start clamoring for it.

> 
> * State that CM information should be written to PNGs inside ORA
> files, and read/used when loading them (without placing any
> requirements on pixel storage inside apps)
> 
> * Advise writers to not use interlacing (it's not like ORA is a
> streaming format).
> 
> * Thumbnails should be sRGB for greater compatibility with desktop
> thumbnail management software.
> 
> 

I agree with all of this.

-- 
Boudewijn Rempt
http://www.valdyas.org, http://www.krita.org, http://www.boudewijnrempt.nl