hrj/gl_test_nexus10

An OpenGL Test case for the Nexus 10

This is a minimal app that crashes on Nexus 10, likely due to a bug in the Nexus 10 system. It works fine on other devices.

This test-case is based on a real app that is also reported to crash on the Nexus 10.

The app is now available on the play store for beta testers. To see it, you need to join either:

• SkEye Google Group or
• SkEye Google+ Community

(Sorry, those are Google's restrictions)

What the app does

The app draws a texture N=25 times on the screen. Each time, the texture is updated in place using glTexSubImage2D. A video of how this appears on a Nexus 4 can be viewed here.

Bug Description

On the Nexus 10, this app crashes silently. There is no exception stack in the log, nor is a "Forced Close" dialog shown to the user.

If the the number of draws (N) is reduced, there is no crash. I have tried with N=2 and it didn't crash.

I haven't found the exact N at which the crash behavior begins (because I don't own a Nexus 10 myself).

Guide to the code

The main action is in MyRenderer.java. A bitmap is created and then a canvas that draws on the bitmap is created. The Canvas APIs are used to draw an arc into the bitmap. The bitmap is then read out into a byte buffer, and then the texure is updated using glTexSubImage2D. This is then shown on the screen using a GLSL shader.