Yep, that's what I'm trying, precisely. For some reason, when I use my old white macbook with intel GPU, this still doesn't work.
This is what QCAdvanced player does as well, and it also crashes on that machine. I was probably way too wordy with my first email. -gt On Apr 19, 2012, at 5:25 PM, CoGe - Tamas Nagy wrote: > When you init your MSAA enabled NSOpenGLContext, check if it fails. If it > fails, it the GPU doesn't supports MSAA, fallback to a "normal" context, and > avoid MSAA related GL calls. > > > On Apr 19, 2012, at 11:18 PM, George Toledo wrote: > >> >> What's the best way to "fallback" when a GPU doesn't have multi sample >> antialiasing available? >> >> Right now, I'm setting up the NSOpenGLPixelFormatAttribute so that it uses >> multisample. This works fine on my machine w/ nVidia 9400/9600, and I'm >> guessing any other GPU that supports MSAA. >> >> So in the code, I setup the pixel format that calls MSAA, and if gl context >> can't be set, then I provide it a pixel format that works on cards that >> don't have multisampling available. I've tried a few variations on the pixel >> format to use when there isn't MSAA available, but I can tell that's not the >> problem. If I run just the "no MSAA" pixel format from start, everything is >> ok on the older machines. >> >> I started out with the idea of doing that from the QCAdvancedPlayer / old >> discussion and vimeo video about enabling multisampling in an app from Vade >> and TobySpark. When I run that code on my old white macbook (intel X3100 >> series GPU, I think it was called), it also fails, so it's not some rogue >> problem elsewhere in my code. >> >> Is there a reliable way to do a check for MSAA or give some conditional >> logic that won't wind up with an app crashing? I'm almost not too worried >> about it, because there are so few machines that don't support MSAA >> nowdays... and I can keep around an alternate build for older machines. I'd >> rather handle the pixel format switch in the app itself if possible. >> >> I don't want to cross-post this, but if it's a more appropriate for another >> list (cocoa, openGL, quartz?), let me know. >> >> -gt >> _______________________________________________ >> Do not post admin requests to the list. They will be ignored. >> Quartzcomposer-dev mailing list ([email protected]) >> Help/Unsubscribe/Update your Subscription: >> https://lists.apple.com/mailman/options/quartzcomposer-dev/info%40cogevj.hu >> >> This email sent to [email protected] > > > > > >
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