Video adapter of a display http://www.allegro.cc/forums/view/617836 Allegro.cc Forum Thread matthew@allegro.cc (Matthew Leverton) Sun, 12 May 2019 00:43:06 +0000

How do you get the video adapter number in use by a given display?

]]> no-reply@allegro.cc (roger levy) Fri, 10 May 2019 23:43:13 +0000

Each adapter represents a monitor.

You can get the primary display by searching for the monitor at 0,0.

To get a specific monitor, you need it's coordinates.

See al_get_monitor_info for details.

]]> no-reply@allegro.cc (Edgar Reynaldo) Sun, 12 May 2019 00:23:23 +0000

How would I get the needed information from an ALLEGRO_DISPLAY?

]]> no-reply@allegro.cc (roger levy) Sun, 12 May 2019 00:35:03 +0000

You don't. The adapter set is the one specified by al_set_new_display_adapter, which defaults to 0.

Rather, just call al_get_new_display_adapter and al_get_monitor_info.

]]> no-reply@allegro.cc (Edgar Reynaldo) Sun, 12 May 2019 00:40:43 +0000

I am not sure that's true because my program is starting on my secondary display.

]]> no-reply@allegro.cc (roger levy) Sun, 12 May 2019 00:41:40 +0000

Adapter 0 is not guaranteed to be the primary display.

]]> no-reply@allegro.cc (Edgar Reynaldo) Sun, 12 May 2019 00:42:07 +0000

I see. Thanks.

]]> no-reply@allegro.cc (roger levy) Sun, 12 May 2019 00:43:06 +0000