[mythtv] Kernel 2X HW-GL Deinterlacing

[Peter Bennett]

On 11/24/18 9:13 PM, Mark Spieth wrote:
> I dont think the coord system is different between GL and GLES but 
> have not checked. GLES just has less capability than GL, I suspect all 
> the other elements are identical. Main issue between them is the 
> precision of the floats I believe for our purposes.

Mark
FYI
I have committed a change to set default float precision on opengl es to 
highp instead of mediump. It does not affect shield, which seems to use 
high precision regardless, but it fixes fire tv 4k so that YV12 and UYVY 
both work. Without this fix, UYVY has poor resolution on the right hand 
side of the screen. Fire tv (non-4k) does not support highp and ignores 
the setting, so I believe this change should not adversely impact 
anybody, it should be ignored where it is not supported.

Peter