Display info

[Karlos]

Hi all,

I got another RTFM question :-P

Does anybody know how to determine the horizontal / vertical refresh rates of a given display from C? I've been rumaging through the RKMS's, Includes & Autodocs and can't seem to find what I need.

I especially need the vertical refresh rate to determine the maximum safe locking time for direct video access / rendering under cybergraphx.

I know the info must be stored away in an intuition or graphics library structure somewhere. After all, you can see the refresh rates in the screenmode preferences window...

Thanks,

K

[Karlos]

*bump*

:-)

[Piru]

Does anybody know how to determine the horizontal / vertical refresh rates of a given display from C?

See getmodeidrate.c.

[Karlos]

Thanks! :-)

-edit-

BTW, whats the significance of the constants 280 and 5 in the

moninfo.TotalColorClocks * 280 * moninfo.TotalRows / 1000) + 5;

expression? Is there any likelyhood that theyre hardware dependent? Sorry if that turns out to be a really stupid question, don't have RKM to hand at the mo :-)

[Piru]

from graphics/displayinfo.h:

/* scanline width in 280 ns units    */

That +5 is just for proper rounding.
These are not hw dependant constants.

[Karlos]

Thanks again ;-)#

-edit-

Worked a treat...