Re: bits_per_sample in pixbuf functions

[Havoc Pennington <hp redhat com>]

"Lewin A.R.W. Edwards" <larwe larwe com> writes: 
> I.e., if I had an internal RGB buffer (8:8:8, i.e. 24bpp) would I use
> 24 or 8 as the bits_per_sample field?

8.

> And a more complex case: if I had a 16bpp buffer, would gdk
> automatically assume that it's 5:6:5?

At the top of gdk_pixbuf_new:

  g_return_val_if_fail (bits_per_sample == 8, NULL);

The real utility of GdkPixbuf (vs. GdkImage) is that it's in a fixed
format. The API is "extensible" to allow new formats but at the moment
only 8-bits-per-sample RGB/RGBA are supported, and I haven't seen any
interest in actually adding other stuff.  

Havoc