Ogre Android - Crash on Home Button

[BigDave2001]

Hi,

I'm getting *occasional* crashes in Ogre when pressing the home button on Android.

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OpenGL ES2 error 0x0506  in virtual void Ogre::GLES2RenderSystem::clearFrameBuffer(unsigned int, const Ogre::ColourValue&, Ogre::Real, short unsigned int) at line 1834

... and this one, which is much more common:

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OGRE EXCEPTION(3:RenderingAPIException): Fail to SwapBuffers in swapBuffers

I would expect that this is to do with OpenGL trying to render when losing focus (and context) - and I have a check when the window loses focus (APP_CMD_LOST_FOCUS) that stops the rendering update. However, with a bit of logging I can see the error is occurring before I receive any key or window messages (I actually don't appear to receive a key message for the home button).

It is a Nexus 7 - code is based on the last 1.9 (which had the comment - merging 1.8-1.9)

Any ideas? Are there any earlier methods of checking when the home button has been pressed?

Thanks

[Wolfmanfx]

Hi,

The problem could be the ndk - you get the messages with a bit of lag on the c++ side.
So it could be that the context is already invalid before the message arrives - i assume the crash happens when you go to the home screen or does it happen when you reopen it?

[BigDave2001]

Thanks for the reply.

Yes, it crashes when I close it. Don't think I've ever had it crash when I've re-opened it (and it has closed safely).
EDIT - when I say close, I mean, go to the home page.

If it is the NDK - is there a way round the problem?

Thanks

[BigDave2001]

Think I've solved the problem:

APP_CMD_PAUSE

This is the first event (and one I wasn't checking) which occurs when the home button is pressed. Stopping rendering at this point appears to have solved it.

[Wolfmanfx]

Thats great i will incorporate into the sample browser.