What non-idempotent code would you have had in onSurfaceChanged()? I would expect it all to be idempotent.
Thanks. On Friday, April 13, 2012 8:56:18 AM UTC-5, Latimerius wrote: > > Okay, if nobody has an answer or explanation, I will hope that moving > non-idempotent code out of onSurfaceChanged() and ignoring the first > onDrawFrame() is enough to work around this bug. > > On Thu, Apr 12, 2012 at 5:57 PM, Latimerius > <[email protected]<javascript:>> > wrote: > > Hello, > > > > googling for the following problem got me a lot of hits where people > > ask or rant about this but no actual explanation so I figured I'll ask > > here, perhaps someone has an update on the problem. > > > > I'm using stock GLSurfaceView, only subclassed to get onTouchEvent(), > > the rest of it is standard. When coming back to my app (*not* > > starting it anew, that seems to work as expected) I get the following > > sequence of calls: > > > > onSurfaceCreated() > > onSurfaceChanged() > > onDrawFrame() > > onSurfaceChanged() > > onDrawFrame() > > onDrawFrame() > > onDrawFrame() > > ... > > > > The (by now standard ;-)) question is: why is onSurfaceChanged() > > called twice? The calls are identical as far as the callee can tell, > > the GL10 argument refers to the same GL10 instance, the width & height > > are the same, too. > > > > The other question (might have been asked before, too, I haven't come > > across that if so) is: the single onDrawFrame() call which occurs > > between both onSurfaceChanged() calls is strange because whatever gets > > drawn during that call (might be just a simple glClear(), or a full > > scene render, doesn't matter) never seems to make it to the screen, > > never becomes visible. Why is that? > > > > I'm trying to figure out whether it's safe to ignore the issue or hack > > around it, and to decide that it'd be very helpful to understand the > > causes. > > > > Thanks in advance! > -- -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en --- You received this message because you are subscribed to the Google Groups "Android Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
