"Steve Mann" <[EMAIL PROTECTED]> wrote in message
news:38991@palm-dev-forum...
>
> >My guess is that ideally the 5 bitmaps will be swapped on the
> >offscreen region in about a second, so I wonder if that is slow enough to
> >fetch them from a resource and then draw to the offscreen region, and
then
> >dump that to the screen. I guess the question here is what I should
> >sacrifice: memory or cpu.
>
> Good questions. I would just try it and see what happens.
>
> >Since we are talking about bitmaps, here is another question: Would it
be
> >better if I, say, make the bitmap dimensions a multiple of 8?
>
> I have no idea. That's a good question for someone at Palm.
>From the looks of things, the fastest PalmOS 3.5 WinCopyRectangle situation
occurs when
1) both src and dest windows are in the same format
2) src and dest X addresses are aligned at the same bit offset within a
16-bit word; for example, a 1-bit copy from (4,10) to (20, 17) would be
fast. If you shifted your src to (5,10), it would take longer due to the
shifting needed.
Having rectangles on 16-bit boundaries with multiples of 16-bits in a row
seems to be the fastest, but there isn't much overhead for starting and
ending outside a 16-bit boundary.
This all probably changes if your using Quickbits or on an older OS version.
--
Ben Combee
Veriprise Wireless <http://www.veriprise.com>
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