Forums - 30 FPS frame cap

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30 FPS frame cap
Antoine Cohade
Join Date: 14 Apr 14
Posts: 4
Posted: Tue, 2014-11-25 15:01

Hi, 

I'm trying to avoid wasting power while developing my app. Easiest way, would be to cap at 30FPS. Ideally, I'd like to use EGLSwapInterval with 2 Vblank interval to do that, but it doesnt seem to be supported by my Nexus 7(2013) - Adreno 320. 

I'd like to do that without adding a sleep in the rendering loop. Is there any chance you will add it to next driver update ?

Thanks, 

Antoine 

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mhfeldma Moderator
Join Date: 29 Nov 12
Posts: 312
Posted: Thu, 2014-12-04 07:37

Our drivers are dependent on the underlying window system which handles syncing with the video refresh. Commonly only 0 or 1 swap intervals are supported on most systems. <?xml:namespace prefix = o /?>

You can query EGL_MAX_SWAP_INTERVAL or EGL_MIN_SWAP_INTERVAL, using eglGetConfigAttrib, to get your range of supported interval values, but you’ll have to say within those limits.

Many games do use a sleep feature to maintain a desired frame rate (which is the preferred/device independent approach). Is there a reason you are averse to doing this?

 

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