Re: i5 & i7 auto graphics switching
Re: i5 & i7 auto graphics switching
- Subject: Re: i5 & i7 auto graphics switching
- From: Trygve Inda <email@hidden>
- Date: Mon, 13 Sep 2010 15:03:10 +0000
- Thread-topic: i5 & i7 auto graphics switching
> 2010/9/12 <email@hidden>
>
>> When it is running on the slow card, the CGDirectDisplayID will be x, and on
>> the fast card it will be y. Is there anyway to derive x from y or y from x?
>> I am trying to be able to uniquely identify screens even before/after a
>> processor switch.
>
> Given a CGDirectDisplayID, you can use
> IORegistryEntryCreateCFProperties to get the display properties. In
> the returned CFDictionary, the value associated with the
> IODisplayPrefsKey remains the same before/after any GPU switch.
>
> I don't know if this is documented anywhere, it's just the result of
> my observations.
How do I get the CGDirectDisplayID into IORegistryEntryCreateCFProperties?
Is this any different than:
io_service_t servicePort = CGDisplayIOServicePort (myCGDirectDisplayID);
CFDictionaryRef oldInfoDict = IODisplayCreateInfoDictionary (servicePort,
kNilOptions);
T.
_______________________________________________
Cocoa-dev mailing list (email@hidden)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden