> It seems that direct screen access is slow on some devices.
My application uses direct screen access to gain some speed especially on old 
devices. Since it's using only 2 bits per pixel (4 level grey) I have not 
examined other modes.

IIRC an old hirez Sony Cli� was not only very slow (the screen got updated 
only every second), it additionally has its bits "the other way around" so 
that the MSBs of each byte hold the right pixel, not the left as usual.

Devices I found really slow are Tungsten W, Samsung i500, and 
Xplore G18.

At least with OS5 the application does the mentioned double buffering and 
bitmap copy with the OS. Since this is ARM code, it so much faster than 
emulated 68K direct access ;-)

Bodo


-- 
For information on using the Palm Developer Forums, or to unsubscribe, please 
see http://www.palmos.com/dev/support/forums/

Reply via email to