Are the check of EXT_color_buffer_float in the gpgpu_context need to be forced?

[lygstate]

https://github.com/tensorflow/tfjs-core/blob/5d0b2997e2f56f126d146dbe282fe1fd08a6ff53/src/kernels/webgl/gpgpu_context.ts#L69

I have GPU that do not support for EXT_color_buffer_float but support OpenGL ES 3.1(Mali T720).
I want to running tfjs on that GPU:)

[nsthorat]

Yes unfortunately we need that extension to render floats. What browser are you using?

[lygstate]

I am using Chrome 67 under Android 7.0 with (Mali T720 + ARM A53)

[lygstate]

How about using https://skytiger.wordpress.com/2010/12/01/packing-depth-into-color/ to polyfill when EXT_color_buffer_float not available

[lygstate]

How about DEPTH_COMPONENT32F for gray image?

[nsthorat]

Closing this out in favor of #551