> Copying from a RAM buffer direct to VRAM: 35 - 38 frames per second
> Copying from VRAM to VRAM: 20 frames per second.
not to be picky, but - why would one want to copy from VRAM to VRAM?
if you have the adequate knowledge of the hardware, you'd just
manually set the display address on the controller to point to
the two VRAM chunks consecutively. :)
> Well, I hope this was informative and not merely a waste of bandwidth.
> If you're thinking I need a good flaming, just remember that I mean
> well. :)
so, basically.. if you create your own offscreen window, and blit
the data directly to VRAM - thats the most optimal solution without
tweaking anything - which is what everyone does right now.
also, in regards to VRAM, only color devices have it right now :)
so performance tests on other Palms may prove pointless :) they
will yield RAM -> RAM copy rates, which are a lot higher.
focusing on hardware specific issues will only cause more problems
in the future.. for example, right now, the only way to test if the
SED 1375/6 controller exists is to read from a predefined memory
location (0x1f00000 - from memory) and check if the value 0x24
exists in that location
on a device without the SED 1375/6 controller, you'll get a nice
little bus error.. fatal exception -> reset.
now, how does one detect if the SED controller exists? right now,
you have to check if it is a color device and then check this
value.. the problem arises when a new display controller is
used in a new device - and a new memory location is used for
checking the existance of the controller..
as i discussed with david fedor at palmsource europe, it would
be nice to have a feature made available - to tell developers
an identification code of some form for the display controller(s)
however, the real question is if Palm wants to venture down
that line?? do they really care about "pushing the limit"?
is the device supposed to be a gaming platform? those are
the questions you need to get answers to.
just my 2c.
// az
[EMAIL PROTECTED]
http://www.ardiri.com/ <--- free games!
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