On Fri, Aug 04, 2000 at 11:23:43AM -0700, Stuart Nicholson wrote:
> Don't think so...you'll have to get nasty with the hardware registers.
>
> In my experience PalmOS didn't support 16 gray shades properly until
> PalmOS 3.3 (despite EZ devices being capable of it).
>
> Although I'd love it if somebody would correct me!
> -----Original Message-----
> From: DIAMOND JEFF [mailto:[EMAIL PROTECTED]]
>
> I noticed the glue library has nothing in it involving graphics.
> If you wanted someone with an older (EZ) Palm running OS 3.1 to switch
> into 16 shades mode, would you have to write the low level driver
> yourself, or is their an approved way to do it?
I have a question into Handspring's developer support about this but
have received no response to date.
OS 3.1 will do 4 level greyscale if you do the Seeing Gray calls, but
a Visor has an EZ and will do 16 level grayscale.
For now, I've had to create a separate routine for displaying PNG
files (PiNGer, part of PalmBoxer) in 16 level grayscale just for the
Visor. OS 3.3 on my V works fine, as does the Visor, but in 4 level
grey if I don't hack hardware. But the contrast slider isn't
available in that mode. Then there's color, which requires 3.5, and I
don't know how the palette operations work on a 16 level Palm (and
have been too busy to try - it works for color, and the old calls work
for grey).
On my www.execpc.com/~tz I wrote an example (hardware hack since it
was pre-3.3) greyscale doodlepad, but the PiNGer backend source is
more mature, and you can compare things (both are GPL, the latter is
part of boxer at palmboxer.sourceforge.net).
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