android: Depth buffer problems on Letv Le 1s

[ozkriff]

Letv Le 1s, Andoid 6.0, Opengl ES 3.1, MTK6795

https://gist.github.com/ozkriff/6d7eae2d40251054d960a3e224935485

[ozkriff]

This is how it looks on this phone after the firmware update:

wow.. z-fighting? bad vertex indices? something else?

[ozkriff]

I'll try to update main deps and build a new apk in a few days. Maybe it'll go away on its own? :)

[ozkriff]

See gfx-rs/gfx#1188

[shmutalov]

Changing a precision solves problem:
gfx-rs/gfx#1188 (comment)

[ozkriff]

Ok, so we need to set highp in fragment shader only.

[ozkriff]

Done in https://github.com/ozkriff/zoc/tree/WIP_248_glsl_es_precision

@shmutalov Can you check if it still works on your phone?

[shmutalov]

@ozkriff works as expected. No problems with Z-buffer )