From: Andrew Apted <ajapted@netspace.net.au>
  To  : ggi-develop@eskimo.com
  Date: Wed, 12 Aug 1998 23:43:56 +1000

Re: Graph types...

Johan Karlberg writes:

>  we define a couple of graphtypes, but for exampl GT_16BIT, what IS 16 bit?
>  is it a 5-5-5-1 (XGA) mode, a 5-6-5 (TARGA) mode, or even a 6-6-5 RGB
>  mode?

It depends on the hardware.  The mode could be RGB 5:6:5 or 6:6:4 or
5:7:4, with or without byte swapping (e.g. little endian card in a big
endian machine).  Once you set the mode, you can query the format with
the ggiGetPixelFormat() function or via the DirectBuffer interface.

Cheers,
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  Andrew Apted   <andrew@ggi-project.org>       \/