Fails to generate texture when running zenity on Nexus 4

[Robert Ancell]

Test case:
1. Run XMir on a Nexus 4:
$ Xmir :0 --desktop_file_hint=dialer-app
2. Run zenity
2. DISPLAY=:0 zenity --info

XMir hits an assertion:
Xmir: glamor_fbo.c:189: glamor_pixmap_ensure_fb: Assertion `fbo->tex != 0' failed.

Digging into the code, the failure is occurring in _glamor_create_tex (glamor/glamor_fbo.c). The glGenTextures is returning a 0 for the texture and not setting an error code in glGetError.

[Robert Ancell (robert-ancell)]

The possibilities I've been investigating are:
- We're not setting the GLES context correctly
- There is an issue in the driver that is due to the way we are prompting it
- There is some sort of out of memory issue (doesn't seem to be the case as there aren't a huge amount of textures in use)

[Daniel van Vugt (vanvugt)]

zenity --info works on a Nexus 4 is Xmir is in -sw mode. However the colours are backwards (red/blue mixed up I think).

[Daniel van Vugt (vanvugt)]

Blocked by bug 1494240 :(

[Daniel van Vugt (vanvugt)]

Dropped severity. Glamor is not used by default.