[CREATE] OpenRaster fallbacks (proposal/RFC)
martinxyz at gmx.ch
Wed Sep 2 11:03:21 PDT 2009
On Wed, Sep 02, 2009 at 10:12:48AM +0200, Cyrille Berger wrote:
> That sounds like a bug in Krita, it should be able to open it at 16bit, or
> maybe it's just that the main image is always marked as RGB 8bit (very likely)
> and the layer is actually 16bit, do you have the file so that I can check ?
> Now that I think of it, I seems to remember there is a function in libpng that
> always return a RGB 8bit image (whatever the original image is, 8/16bit RGB,
> grayscale, indexed). It's very possible that MyPaint use that, and DrawPile
Sounds very likely.
> But if there is that API, we can as well says that the fallback can be any
> kind of PNG, and people who only support RGB 8bit would be advised to use that
That doesn't sound so bad then. If we choose to make this official, then we
should offer a kind of "compatibility test suite" of ORA files for
developers to check against, as this case is easily overlooked.
> On that point, I am not too concern about those breakage, I think that
> OpenRaster goal is interoperability, but if that goal can only be achieved in
> a year, it's not a big problem for me (as long as we communicate on this). So
> what it is important is that mypaint keeps being able to open old files created
> with older mypaint.
There is a GIMP plugin being written, and I recently got mail from someone
who wants to try implementing full-screen previews in a file browser (gloobus).
I hope we can make only one breakage, and after that applications should be
able to add as much compatibility as they think is still required when saving.
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