It sounds like the issue might be your fragment shader. How complex is it? On today's mobile GPUs you cannot do that many operations per fragment at 60fps.
On Tue, Jan 10, 2012 at 1:08 PM, Brad Grimm <sna...@gmail.com> wrote: > I have noticed an interesting bug when using TextureView with the > Camera. > > If I setup a TextureView, pass it a valid OpenGL texture and pass that > into the camera, everything works great. I can then swap out the > pixel shader with a simple shader and all still works great. But if I > swap out the pixel shader with a more complex shader the framerate > drops and stuttering appears. > > What seems to be happening is that a frame is getting processed out of > order. After some hypothesizing I wondered if the hardware was being > sent too much to do. After trying a number of things I found that if > I just slept the gl processing thread for around 75 milliseconds or so > the framerate jumped back up and the stuttering disappeared. > > This is an okay hack for now, but I worry that value is just an > arbitrary guess based on my shader, and that it may change with other > shaders or other phones. My question is: Is it possible to know when > it is safe to send another frame down to OpenGL without over-taxing > the system? (Or is something else going on here?) > > I have tried using glFinish, and glFlush and neither of these helped. > I wondered if that was because the camera uses samplerExternalOES and > somehow that effects it? > > Note: If I run the same OpenGL code using a SurfaceView instead I > don't get any stuttering. Of course the performance isn't as good so > that may be the reason it doesn't. > > Any help is appreciated. > > Thanks, > Brad > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to android-developers@googlegroups.com > To unsubscribe from this group, send email to > android-developers+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en -- Romain Guy Android framework engineer romain...@android.com -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
