[Development] QSG render thread crashes during volumetric rendering

[Sean Harmer]

On Monday 15 December 2014 14:16:17 Cartik Sharma wrote:
> Thanks so much. I tried a view.resetOpenGLState and it works without
> crashing.

One of the common ways this crashes the driver is inside calls to 
glDrawElements if you have a bad element buffer bound which then indexes into 
some random memory address. This is easy to have happen if VTK leaves some 
state configured when control goes back to Qt Quick. Qt Quick assumes the state 
has not been tampered with and may go ahead and update something which 
tramples over one of your buffers.

A handy technique is to run your app through a debug tracing tool like 
apitrace to see what state is left behind by your custom rendering code.

Cheers,

Sean
--
Dr Sean Harmer | sean.harmer at kdab.com | Managing Director UK
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